記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   出版者・発行元：Medical Education Online  

COVID-19 pandemic has caused disruption in higher medical education and healthcare worldwide. To thrive in times of uncertainty, medical higher education institutions have to adapt to the post-COVID-19 era and innovate its international activities. To make a difference in societies locally, nationally and internationally, they will have to enhance their global presence. Internationalization is the best way to the exchanging of knowledge, enhancement of the medical curriculum, and mobilization of talent and resources for research and teaching. To remain competitive, universities will need to expand their international activities. This paper highlights several suggestions to enhance internationalization of medical higher education institutions in the post-COVID-19 era.

DOI： 10.1080/10872981.2023.2202459

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記述言語：英語   出版者・発行元：Neuropsychopharmacology Reports  

Background: Copy number variations (CNVs) have been implicated in psychiatric and neurodevelopmental disorders. Especially, 15q13.3 deletions are strongly associated with autism spectrum disorder (ASD), intellectual disability (ID), schizophrenia (SCZ), attention deficithyperactivity disorder (ADHD), and mood disorder. Case Presentation: We present two siblings with ASD. They had a father with bipolar disorder (BD). Patient 1 is a 21-year-old female with ASD and mild ID, who had language delay and repetitive behavior in childhood, social difficulties, and refused to go to school because of bullying. She was hospitalized in a psychiatric hospital several times. Patient 2 is a 19-year-old male with ASD and ADHD. He did not have developmental delay, but had social difficulties and impulsiveness, then refused to go to school because of bullying. He was treated by a psychiatrist for anxiety and disrupted sleep rhythms. Array comparative genomic hybridization was performed for the siblings and parents. 15q13.3 deletions were detected in the siblings and their healthy mothers. No other pathogenic CNVs were detected. We performed whole-genome sequencing of the family and identified 13 rare missense variants in brain-expressed genes, which may be responsible for the phenotypic differences between the siblings and their mother. Conclusions: This study shows incomplete penetrance and variable expressivity in 15q13.3 deletions. We detected second-hit variants that may explain the phenotypic differences within this family. In addition, detecting 15q13.3 deletions may lead to early diagnosis and a better prognosis with careful follow-up.

DOI： 10.1002/npr2.12340

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記述言語：英語   出版者・発行元：Journal of Clinical Psychopharmacology  

Aim The Drug-Induced Extrapyramidal Symptom Scale (DIEPSS) is a multidimensional rating scale for the assessment of drug-induced extrapyramidal symptoms (EPS), developed in 1994. It is suitable for evaluating EPS considering the degree of influence EPS has on daily activities and the subjective distress that it causes. Method This study to evaluate the interrater and test-retest reliability of the DIEPSS Slovenian version conducted at the University Medical Center Maribor in Slovenia in November 2018. Results Six raters performed the interrater assessment of 135 DIEPSS video clips with recordings of patients with EPS. A second assessment was then performed by 2 raters to evaluate the test-retest reliability, which was high (interclass correlation coefficients from 0.743 to 0.936). Conclusions The results for the Slovenian language version of the DIEPSS show high interrater and test-retest reliability, with high concordance rates for all evaluated items (interclass correlation coefficient > 0.8).

DOI： 10.1097/JCP.0000000000001682

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記述言語：英語   出版者・発行元：Human Genetics  

The minichromosome maintenance (MCM) complex acts as a DNA helicase during DNA replication, and thereby regulates cell cycle progression and proliferation. In addition, MCM-complex components localize to centrosomes and play an independent role in ciliogenesis. Pathogenic variants in genes coding for MCM components and other DNA replication factors have been linked to growth and developmental disorders as Meier–Gorlin syndrome and Seckel syndrome. Trio exome/genome sequencing identified the same de novo MCM6 missense variant p.(Cys158Tyr) in two unrelated individuals that presented with overlapping phenotypes consisting of intra-uterine growth retardation, short stature, congenital microcephaly, endocrine features, developmental delay and urogenital anomalies. The identified variant affects a zinc binding cysteine in the MCM6 zinc finger signature. This domain, and specifically cysteine residues, are essential for MCM-complex dimerization and the induction of helicase activity, suggesting a deleterious effect of this variant on DNA replication. Fibroblasts derived from the two affected individuals showed defects both in ciliogenesis and cell proliferation. We additionally traced three unrelated individuals with de novo MCM6 variants in the oligonucleotide binding (OB)-fold domain, presenting with variable (neuro)developmental features including autism spectrum disorder, developmental delay, and epilepsy. Taken together, our findings implicate de novo MCM6 variants in neurodevelopmental disorders. The clinical features and functional defects related to the zinc binding residue resemble those observed in syndromes related to other MCM components and DNA replication factors, while de novo OB-fold domain missense variants may be associated with more variable neurodevelopmental phenotypes. These data encourage consideration of MCM6 variants in the diagnostic arsenal of NDD.

DOI： 10.1007/s00439-023-02569-7

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記述言語：英語  

DOI： 10.1016/j.ajhg.2023.04.008

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出版者・発行元：Nature Genetics  

Some individuals with autism spectrum disorder (ASD) carry functional mutations rarely observed in the general population. We explored the genes disrupted by these variants from joint analysis of protein-truncating variants (PTVs), missense variants and copy number variants (CNVs) in a cohort of 63,237 individuals. We discovered 72 genes associated with ASD at false discovery rate (FDR) ≤ 0.001 (185 at FDR ≤ 0.05). De novo PTVs, damaging missense variants and CNVs represented 57.5%, 21.1% and 8.44% of association evidence, while CNVs conferred greatest relative risk. Meta-analysis with cohorts ascertained for developmental delay (DD) (n = 91,605) yielded 373 genes associated with ASD/DD at FDR ≤ 0.001 (664 at FDR ≤ 0.05), some of which differed in relative frequency of mutation between ASD and DD cohorts. The DD-associated genes were enriched in transcriptomes of progenitor and immature neuronal cells, whereas genes showing stronger evidence in ASD were more enriched in maturing neurons and overlapped with schizophrenia-associated genes, emphasizing that these neuropsychiatric disorders may share common pathways to risk.

DOI： 10.1038/s41588-022-01104-0

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記述言語：英語   出版者・発行元：Ovid Technologies (Wolters Kluwer Health)  

<jats:sec>
<jats:title>Objective</jats:title>
<jats:p>Studies showed that rare copy number variations (CNVs) encompassing the vasoactive intestinal peptide receptor 2 gene (<jats:italic toggle="yes">VIPR2</jats:italic>) were associated with schizophrenia, indicating <jats:italic toggle="yes">VIPR2</jats:italic> is a risk gene for schizophrenia. We hypothesized that besides CNV, rare pathogenic single-nucleotide variant (SNV) or small insertion/deletion (Indel) of <jats:italic toggle="yes">VIPR2</jats:italic> might be present in some patients and contribute to the pathogenesis of schizophrenia.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Methods</jats:title>
<jats:p>We performed genome-wide CNV analysis to screen CNV at the <jats:italic toggle="yes">VIPR2</jats:italic> locus and targeted sequencing of all the exons of <jats:italic toggle="yes">VIPR2</jats:italic> to search for SNV and indel in a sample of patients with chronic schizophrenia from Taiwan.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Results</jats:title>
<jats:p>We detected a 230-kb microduplication encompassing the <jats:italic toggle="yes">VIPR2</jats:italic> in 1 out of 200 patients. Furthermore, we identified six ultrarare SNVs, including one splicing SNV and five missense SNVs, in 516 patients. In-silico analyses showed these SNVs had a damaging effect on the function of <jats:italic toggle="yes">VIPR2</jats:italic>.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Conclusion</jats:title>
<jats:p>Our findings support the idea that besides CNV, rare pathogenic SNVs of <jats:italic toggle="yes">VIPR2</jats:italic> might contribute to the pathogenesis of schizophrenia in some patients.</jats:p>
</jats:sec>

DOI： 10.1097/YPG.0000000000000313

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記述言語：英語   出版者・発行元：Asia-Pacific Psychiatry  

DOI： 10.1111/appy.12509

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記述言語：英語   出版者・発行元：European child &amp; adolescent psychiatry  

DOI： 10.1007/s00787-021-01788-5

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記述言語：英語   出版者・発行元：Human Genome Variation  

Disabled 1 (DAB1) is an intracellular adaptor protein in the Reelin signaling pathway and plays an essential role in correct neuronal migration and layer formation in the developing brain. DAB1 has been repeatedly reported to be associated with neurodevelopmental disorders including schizophrenia (SCZ) and autism spectrum disorders (ASD) in genetic, animal, and postmortem studies. Recently, increasing attention has been given to rare single-nucleotide variants (SNVs) found by deep sequencing of candidate genes. In this study, we performed exon-targeted resequencing of DAB1 in 370 SCZ and 192 ASD patients using next-generation sequencing technology to identify rare SNVs with a minor allele frequency <1%. We detected two rare missense mutations (G382C, V129I) and then performed a genetic association study in a sample comprising 1763 SCZ, 380 ASD, and 2190 healthy control subjects. Although no statistically significant association with the detected mutations was observed for either SCZ or ASD, G382C was found only in the case group, and in silico analyses and in vitro functional assays suggested that G382C alters the function of the DAB1 protein. The rare variants of DAB1 found in the present study should be studied further to elucidate their potential functional relevance to the pathophysiology of SCZ and ASD.

DOI： 10.1038/s41439-020-00125-7

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.euroneuro.2019.08.099

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.euroneuro.2017.08.085

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.euroneuro.2018.08.490

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掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Lancet Psychiatry  

DOI： 10.1016/S2215-0366(16)30409-6

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DOI： 10.1016/j.buildenv.2016.07.002

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掲載種別：研究論文（学術雑誌）  

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掲載種別：研究論文（学術雑誌）  

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DOI： 10.1016/S0920-9964(14)70345-7

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1136/bmjopen-2011-000596corr1

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Recent genetic studies have found common genomic risk variants among psychiatric disorders, strongly suggesting the overlaps in their molecular and cellular mechanism. Our research group identified the variant in ASTN2 as one of the candidate risk factors across these psychiatric disorders by whole-genome copy number variation analysis. However, the alterations in the human neuronal cells resulting from ASTN2 variants identified in patients remain unknown. To address this, we used patient-derived and genome-edited iPS cells with ASTN2 deletion; cells were further differentiated into neuronal cells. A comprehensive gene expression analysis using genome-edited iPS cells with variants on both alleles revealed that the expression level of ZNF558, a gene specifically expressed in human forebrain neural progenitor cells, was greatly reduced in ASTN2-deleted neuronal cells. Furthermore, the expression of the mitophagy-related gene SPATA18, which is repressed by ZNF558, and mitophagy activity were increased in ASTN2-deleted neuronal cells. These phenotypes were also detected in neuronal cells differentiated from patient-derived iPS cells with heterozygous ASTN2 deletion. Our results suggest that ASTN2 deletion is related to the common pathogenic mechanism of psychiatric disorders by regulating mitophagy via ZNF558.

DOI： 10.1038/s41398-024-02962-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nagoya Journal of Medical Science  

Psychiatric disorders are highly inheritable, and most psychiatric disorders exhibit genetic overlap. Recent studies associated the 3q29 recurrent deletion with schizophrenia (SCZ) and autism spectrum disorder (ASD). In this study, we investigated the association of genes in the 3q29 region with SCZ and ASD. TM4SF19 and PAK2 were chosen as candidate genes for this study based on evidence from previous research. We sequenced TM4SF19 and PAK2 in 437 SCZ cases, 187 ASD cases and 524 controls in the Japanese population. Through targeted sequencing, we identified 6 missense variants among the cases (ASD & SCZ), 3 missense variants among controls, and 1 variant common to both cases and controls; however, no loss-of-function variants were identified. Fisher’s exact test showed a significant association of variants in TM4SF19 among cases (p=0.0160). These results suggest TM4SF19 variants affect the etiology of SCZ and ASD in the Japanese population. Further research examining 3q29 region genes and their association with SCZ and ASD is thus needed.

DOI： 10.18999/nagjms.86.2.216

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記述言語：日本語   出版者・発行元：(株)メディカルレビュー社  

摂食症の発症には遺伝的要因が関与することが知られている。筆者らは,重症の摂食症患者を対象にゲノムコピー数バリアント(CNV)解析を行った結果,神経発達症に関連するCNVが発症リスクに関与すること,摂食症病態にシナプス機能異常が寄与することが示唆された。この知見に基づき,今後,分子メカニズムの解明が進むことが期待される。(著者抄録)

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Whole genome analysis has identified rare copy number variations (CNV) that are strongly involved in the pathogenesis of psychiatric disorders, and 3q29 deletion has been found to have the largest effect size. The 3q29 deletion mice model (3q29-del mice) has been established as a good pathological model for schizophrenia based on phenotypic analysis; however, circadian rhythm and sleep, which are also closely related to neuropsychiatric disorders, have not been investigated. In this study, our aims were to reevaluate the pathogenesis of 3q29-del by recreating model mice and analyzing their behavior and to identify novel new insights into the temporal activity and temperature fluctuations of the mouse model using a recently developed small implantable accelerometer chip, Nano-tag. We generated 3q29-del mice using genome editing technology and reevaluated common behavioral phenotypes. We next implanted Nano-tag in the abdominal cavity of mice for continuous measurements of long-time activity and body temperature. Our model mice exhibited weight loss similar to that of other mice reported previously. A general behavioral battery test in the model mice revealed phenotypes similar to those observed in mouse models of schizophrenia, including increased rearing frequency. Intraperitoneal implantation of Nano-tag, a miniature acceleration sensor, resulted in hypersensitive and rapid increases in the activity and body temperature of 3q29-del mice upon switching to lights-off condition. Similar to the 3q29-del mice reported previously, these mice are a promising model animals for schizophrenia. Successive quantitative analysis may provide results that could help in treating sleep disorders closely associated with neuropsychiatric disorders.

DOI： 10.1038/s41398-023-02679-w

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Neuropsychopharmacology Reports  

Aim: The present study aimed to examine the association between copy number variations (CNVs) in parkin (PRKN) and schizophrenia (SCZ) and autism spectrum disorder (ASD) in a large case–control sample. Method: Array comparative genomic hybridization was performed on 3111 cases with SCZ, 1236 cases with ASD, and 2713 controls. We systematically prioritized likely pathogenic CNVs (LP-CNVs) in PRKN and examined their association with SCZ and ASD. Results: In total, 3014 SCZ cases (96.9%), 1205 ASD cases (97.5%), and 2671 controls (98.5%) passed quality control. We found that monoallelic carriers of LP-CNVs in PRKN were common (70/6890, 1.02%) and were not at higher risk of SCZ (p = 0.29) or ASD (p = 0.72). We observed that the distribution pattern of LP-CNVs in the Japanese population was consistent with those in other populations. We also identified a patient diagnosed with SCZ and early-onset Parkinson's disease carrying biallelic pathogenic CNVs in PRKN. The absence of Parkinson's symptoms in 10 other monoallelic carriers of the same pathogenic CNV further reflects the lack of effect of monoallelic pathogenic variants in PRKN in the absence of a second hit. Conclusion: The present findings suggest that monoallelic CNVs in PRKN do not confer a significant risk for SCZ or ASD. However, further studies to investigate the association between biallelic CNVs in PRKN and SCZ and ASD are warranted.

DOI： 10.1002/npr2.12370

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記述言語：英語   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:sec><jats:title>Background</jats:title><jats:p>Chromosome 16p13.11 duplication is a well‐known genetic risk factor for schizophrenia (SCZ) (odds ratio = 1.84). However, no case reports focusing on patients with SCZ and 16p13.11 duplication have been published. Therefore, here, we report the detailed clinical cases of four patients with SCZ and 16p13.11 duplication who were identified in our previous whole‐genome copy number variant (CNV) study.</jats:p></jats:sec><jats:sec><jats:title>Case Presentation</jats:title><jats:p>In the four patients with SCZ and 16p13.11 duplication detected by array comparative genomic hybridization, one patient was found to have treatment‐resistant SCZ and an additional pathogenic rare CNV. Two of the four patients in this study had environmental risk factors that may have been involved in the development of SCZ.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The results of this case series suggest that a genetic cohort study would be useful for evaluating which genetic and environmental risk factors could better explain the variable expressivity of 16p13.11 duplication. Furthermore, this work could be useful for elucidating the pathophysiology of SCZ.</jats:p></jats:sec>

DOI： 10.1002/npr2.12334

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

Schizophrenia is a complex and often chronic psychiatric disorder with high heritability. Diagnosis of schizophrenia is still made clinically based on psychiatric symptoms; no diagnostic tests or biomarkers are available. Pathophysiology-based diagnostic scheme and treatments are also not available. Elucidation of the pathogenesis is needed for development of pathology-based diagnostics and treatments. In the past few decades, genetic research has made substantial advances in our understanding of the genetic architecture of schizophrenia. Rare copy number variations (CNVs) and rare single-nucleotide variants (SNVs) detected by whole-genome CNV analysis and whole-genome/-exome sequencing analysis have provided the great advances. Common single-nucleotide polymorphisms (SNPs) detected by large-scale genome-wide association studies have also provided important information. Large-scale genetic studies have been revealed that both rare and common genetic variants play crucial roles in this disorder. In this review, we focused on CNVs, SNVs, and SNPs, and discuss the latest research findings on the pathogenesis of schizophrenia based on these genetic variants. Rare variants with large effect sizes can provide mechanistic hypotheses. CRISPR-based genetics approaches and induced pluripotent stem cell technology can facilitate the functional analysis of these variants detected in patients with schizophrenia. Recent advances in long-read sequence technology are expected to detect variants that cannot be detected by short-read sequence technology. Various studies that bring together data from common variant and transcriptomic datasets provide biological insight. These new approaches will provide additional insight into the pathophysiology of schizophrenia and facilitate the development of pathology-based therapeutics.

DOI： 10.1038/s10038-022-01059-4

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その他リンク： https://www.nature.com/articles/s10038-022-01059-4

DOI： 10.21203/rs.3.rs-2586527/v1

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記述言語：英語   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13494

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>The aims of the present study were: (i) to examine the association between schizophrenia (SCZ) and 47, XXY or 47, XXX in a large case–control sample; and (ii) to characterize the clinical features of patients with SCZ with these X chromosome aneuploidies.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>To identify 47, XXY and 47, XXX, array comparative genomic hybridization (aCGH) was performed in 3188 patients with SCZ and 3586 controls. We examined the association between 47, XXY and 47, XXX and SCZ in males and females separately using exact conditional tests to control for platform effects. Clinical data were retrospectively examined for patients with SCZ with X chromosome aneuploidies.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Of the analyzed samples, 3117 patients (97.8%) and 3519 controls (98.1%) passed our quality control. X chromosome aneuploidies were exclusively identified in patients: 47, XXY in seven patients (0.56%), 47, XXX in six patients (0.42%). Statistical analysis revealed a significant association between SCZ and 47, XXY (<jats:italic>P</jats:italic> = 0.028) and 47, XXX (<jats:italic>P</jats:italic> = 0.011). Phenotypic data were available from 12 patients. Treatment‐resistance to antipsychotics and manic symptoms were observed in six patients each (four with 47, XXY and two with 47, XXX for both), respectively. Statistical analysis revealed that treatment‐resistance to antipsychotics, mood stabilizer use, and manic symptoms were significantly more common in patients with 47, XXY than in male patients without pathogenic copy number variations.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>These findings indicate that both 47, XXY and 47, XXX are significantly associated with risk for SCZ. Patients with SCZ with 47, XXY may be characterized by treatment‐resistance and manic symptoms.</jats:p></jats:sec>

DOI： 10.1111/pcn.13474

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Biological Psychiatry  

Background: We aimed to determine the similarities and differences in the roles of genic and regulatory copy number variations (CNVs) in bipolar disorder (BD), schizophrenia (SCZ), and autism spectrum disorder (ASD). Methods: Based on high-resolution CNV data from 8708 Japanese samples, we performed to our knowledge the largest cross-disorder analysis of genic and regulatory CNVs in BD, SCZ, and ASD. Results: In genic CNVs, we found an increased burden of smaller (<100 kb) exonic deletions in BD, which contrasted with the highest burden of larger (>500 kb) exonic CNVs in SCZ/ASD. Pathogenic CNVs linked to neurodevelopmental disorders were significantly associated with the risk for each disorder, but BD and SCZ/ASD differed in terms of the effect size (smaller in BD) and subtype distribution of CNVs linked to neurodevelopmental disorders. We identified 3 synaptic genes (DLG2, PCDH15, and ASTN2) as risk factors for BD. Whereas gene set analysis showed that BD-associated pathways were restricted to chromatin biology, SCZ and ASD involved more extensive and similar pathways. Nevertheless, a correlation analysis of gene set results indicated weak but significant pathway similarities between BD and SCZ or ASD (r = 0.25–0.31). In SCZ and ASD, but not BD, CNVs were significantly enriched in enhancers and promoters in brain tissue. Conclusions: BD and SCZ/ASD differ in terms of CNV burden, characteristics of CNVs linked to neurodevelopmental disorders, and regulatory CNVs. On the other hand, they have shared molecular mechanisms, including chromatin biology. The BD risk genes identified here could provide insight into the pathogenesis of BD.

DOI： 10.1016/j.biopsych.2022.04.003

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>Eating disorders (EDs) are complex, multifactorial psychiatric conditions. Previous studies identified pathogenic copy number variations associated with NDDs (NDD‐CNVs) in ED patients. However, no statistical evidence for an association between NDD‐CNVs and EDs has been demonstrated. Therefore, we examined whether NDD‐CNVs confer risk for EDs.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Using array comparative genomic hybridization (aCGH), we conducted a high‐resolution CNV analysis of 71 severe female ED patients and 1045 female controls. According to the American College of Medical Genetics guidelines, we identified NDD‐CNVs or pathogenic/likely pathogenic CNVs in NDD‐linked loci. Gene set analysis was performed to examine the involvement of synaptic dysfunction in EDs. Clinical data were retrospectively examined for ED patients with NDD‐CNVs.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Of the samples analyzed with aCGH, 70 severe ED patients (98.6%) and 1036 controls (99.1%) passed our quality control filtering. We obtained 189 and 2539 rare CNVs from patients and controls, respectively. NDD‐CNVs were identified in 10.0% (7/70) of patients and 2.3% (24/1036) of controls. Statistical analysis revealed a significant association between NDD‐CNVs and EDs (odds ratio = 4.69, <jats:italic>P</jats:italic> = 0.0023). NDD‐CNVs in ED patients included 45,X and deletions at <jats:italic>KATNAL2</jats:italic>, <jats:italic>DIP2A</jats:italic>, <jats:italic>PTPRT</jats:italic>, <jats:italic>RBFOX1</jats:italic>, <jats:italic>CNTN4</jats:italic>, <jats:italic>MACROD2</jats:italic>, and <jats:italic>FAM92B</jats:italic>. Four of these genes were related to synaptic function. In gene set analysis, we observed a nominally significant enrichment of rare exonic CNVs in synaptic signaling in ED patients (odds ratio = 2.55, <jats:italic>P</jats:italic> = 0.0254).</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>Our study provides the first preliminary evidence that NDD‐CNVs may confer risk for severe EDs. The pathophysiology may involve synaptic dysfunction.</jats:p></jats:sec>

DOI： 10.1111/pcn.13430

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pcn.13430

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Autism spectrum disorder (ASD) is a highly heritable, complex disorder in which rare variants contribute significantly to disease risk. Although many genes have been associated with ASD, there have been few genetic studies of ASD in the Japanese population. In whole exomes from a Japanese ASD sample of 309 cases and 299 controls, rare variants were associated with ASD within specific neurodevelopmental gene sets, including highly constrained genes, fragile X mental retardation protein target genes, and genes involved in synaptic function, with the strongest enrichment in trans-synaptic signaling (p = 4.4 × 10−4, Q-value = 0.06). In particular, we strengthen the evidence regarding the role of ABCA13, a synaptic function-related gene, in Japanese ASD. The overall results of this case-control exome study showed that rare variants related to synaptic function are associated with ASD susceptibility in the Japanese population.

DOI： 10.1038/s41398-022-02033-6

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その他リンク： https://www.nature.com/articles/s41398-022-02033-6

記述言語：英語   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13361

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記述言語：英語   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13367

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1371/journal.pone.0268321

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nagoya Journal of Medical Science  

A number of genomic mutations that are thought to be strongly involved in the development of schizophrenia (SCZ) and autism spectrum disorder (ASD) have been identified. Abnormalities involving oligodendrocytes have been reported in SCZ, and as a related gene, oligodendrocyte lineage transcription factor 2 (OLIG2) has been reported to be strongly associated with SCZ. In this study, based on the common disease–rare variant hypothesis, target sequencing of candidate genes was performed to identify rare mutations with a high effect size and the possibility that the identified mutations may increase the risks of SCZ and ASD in the Japanese population. In this study, the exon region of OLIG2 was targeted; 370 patients with SCZ and 192 with ASD were subjected to next-generation sequencing. As a result, one rare missense mutation (A33T) was detected. We used the Sanger method to validate this missense mutation with a low frequency (<1%), and then carried out a genetic association analysis involving 3299 unrelated individuals (1447 with SCZ, 380 with ASD, and 1472 healthy controls) to clarify whether A33T was associated with SCZ or ASD. A33T was not found in either case group, and in only one control. We did not find evidence that p.A33T is involved in the onset of ASD or SCZ; however, associations with this variant need to be evaluated in larger samples to confirm our results

DOI： 10.18999/nagjms.84.2.260

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13329

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pcn.13329

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13324

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pcn.13324

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Several large-scale whole-exome sequencing studies in patients with schizophrenia (SCZ) and autism spectrum disorder (ASD) have identified rare variants with modest or strong effect size as genetic risk factors. Dysregulation of cellular calcium homeostasis might be involved in SCZ/ASD pathogenesis, and genes encoding L-type voltage-gated calcium channel (VGCC) subunits Cav1.1 (CACNA1S), Cav1.2 (CACNA1C), Cav1.3 (CACNA1D), and T-type VGCC subunit Cav3.3 (CACNA1I) recently were identified as risk loci for psychiatric disorders. We performed a screening study, using the Ion Torrent Personal Genome Machine (PGM), of exon regions of these four candidate genes (CACNA1C, CACNA1D, CACNA1S, CACNA1I) in 370 Japanese patients with SCZ and 192 with ASD. Variant filtering was applied to identify biologically relevant mutations that were not registered in the dbSNP database or that have a minor allele frequency of less than 1% in East-Asian samples from databases; and are potentially disruptive, including nonsense, frameshift, canonical splicing site single nucleotide variants (SNVs), and non-synonymous SNVs predicted as damaging by five different in silico analyses. Each of these filtered mutations were confirmed by Sanger sequencing. If parental samples were available, segregation analysis was employed for measuring the inheritance pattern. Using our filter, we discovered one nonsense SNV (p.C1451* in CACNA1D), one de novo SNV (p.A36V in CACNA1C), one rare short deletion (p.E1675del in CACNA1D), and 14 NSstrict SNVs (non-synonymous SNV predicted as damaging by all of five in silico analyses). Neither p.A36V in CACNA1C nor p.C1451* in CACNA1D were found in 1871 SCZ cases, 380 ASD cases, or 1916 healthy controls in the independent sample set, suggesting that these SNVs might be ultra-rare SNVs in the Japanese population. The neuronal splicing isoform of Cav1.2 with the p.A36V mutation, discovered in the present study, showed reduced Ca2+-dependent inhibition, resulting in excessive Ca2+ entry through the mutant channel. These results suggested that this de novo SNV in CACNA1C might predispose to SCZ by affecting Ca2+ homeostasis. Thus, our analysis successfully identified several ultra-rare and potentially disruptive gene variants, lending partial support to the hypothesis that VGCC-encoding genes may contribute to the risk of SCZ/ASD.

DOI： 10.1038/s41398-022-01851-y

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Informa UK Limited  

Chromatin remodelling is an important process in neural development and is related to autism spectrum disorder (ASD) and schizophrenia (SCZ) aetiology. To further elucidate the involvement of chromatin remodelling genes in the genetic aetiology of ASD and SCZ in the Japanese population, we performed a case–control study. Targeted sequencing was conducted on coding regions of four BAF chromatin remodelling complex genes: SMARCA2, SMARCA4, SMARCC2, and ARID1B in 185 ASD, 432 SCZ patients, and 517 controls. 27 rare non-synonymous variants were identified in ASD and SCZ patients, including 25 missense, one in-frame deletion in SMRACA4, and one frame-shift variant in SMARCC2. Association analysis was conducted to investigate the burden of rare variants in BAF genes in ASD and SCZ patients. Significant enrichment of rare missense variants in BAF genes, but not synonymous variants, was found in ASD compared to controls. Rare pathogenic variants indicated by in silico tools were significantly enriched in ASD, but not statistically significant in SCZ. Pathogenic-predicted variants were located in disordered binding regions and may confer risk for ASD and SCZ by disrupting protein–protein interactions. Our study supports the involvement of rare missense variants of BAF genes in ASD and SCZ susceptibility.

DOI： 10.1080/09540261.2022.2072193

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1111/pcn.13309

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Neuroscience Research  

Recent rapid progress in genome analysis and large-scale consortia has made it possible to discover variants with a variety of allele frequencies and effect sizes associated with psychiatric disorders. Among psychiatric disorder-susceptibility variants, rare variants with large effect sizes detected by sequencing analysis or array comparative genomic hybridization would be particularly useful for elucidating pathophysiology by developing disease models, such as genome-edited mouse or induced pluripotent stem cells. In the last decade, investigations of rare variants with large effect size have revealed an important role of neurodevelopment in the pathogenesis of psychiatric disorders. In future research, integration of recent evidence concerning the contribution of the immune system or gut microbiota will enhance our understanding of psychiatric disorders and facilitate novel drug development.

DOI： 10.1016/j.neures.2020.11.008

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Advances in Medical Education and Practice  

Purpose: Japanese higher education institutions have long been striving for the globaliza-tion of medical education. Nagoya University (NU) adopted PBL as a means of enhancing intercultural awareness in globalizing medical education by working with the Norwegian University of Science and Technology (NTNU), Faculty of Medicine and Health Science, under the Trondheim NTNU-Nagoya (TroNa) partnership for mobility and internationaliza-tion of child and mental health studies. This study aims to assess students’ attitudes towards PBL and to suggest future developments in this form of education by introducing common PBL scenarios experienced at NTNU and NU. Methods: Two 90-minute PBL sessions were conducted at NU. Ten groups of medical students were formed, each consisting of up to 10 students, and students were asked to fill in a questionnaire developed to assess their understanding of, attitudes to and satisfaction with the classes. We investigated three different groups of questions on: NU medical students’ general impressions of PBL; their impressions of PBL in child and adolescent psychiatry (CAP); and their impressions of PBL in specific case scenarios. Correlations between each of the questions from the three groups were evaluated using multivariate analysis. Results: Overall, a majority of the NU medical students were satisfied with PBL, while a small number preferred traditional lecture-style learning (5%). More than half of the students agreed that PBL increased their understanding and interest in CAP (53%), although some male students felt that the amount of time spent was insufficient (20.3%). Correlations were seen for students who thought that PBL enhanced their understanding of and interest in CAP. Regarding case scenarios, most students (82.5%) agreed that PBL helped them to develop clinical problem-solving skills. Conclusion: The study found an overall positive attitude towards PBL, PBL in CAP and the specific PBL case scenario presented.

DOI： 10.2147/AMEP.S333958

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Dysregulation of epigenetic processes involving histone methylation induces neurodevelopmental impairments and has been implicated in schizophrenia (SCZ) and autism spectrum disorder (ASD). Variants in the gene encoding lysine demethylase 4C (KDM4C) have been suggested to confer a risk for such disorders. However, rare genetic variants in KDM4C have not been fully evaluated, and the functional impact of the variants has not been studied using patient-derived cells. In this study, we conducted copy number variant (CNV) analysis in a Japanese sample set (2605 SCZ and 1141 ASD cases, and 2310 controls). We found evidence for significant associations between CNVs in KDM4C and SCZ (p = 0.003) and ASD (p = 0.04). We also observed a significant association between deletions in KDM4C and SCZ (corrected p = 0.04). Next, to explore the contribution of single nucleotide variants in KDM4C, we sequenced the coding exons in a second sample set (370 SCZ and 192 ASD cases) and detected 18 rare missense variants, including p.D160N within the JmjC domain of KDM4C. We, then, performed association analysis for p.D160N in a third sample set (1751 SCZ and 377 ASD cases, and 2276 controls), but did not find a statistical association with these disorders. Immunoblotting analysis using lymphoblastoid cell lines from a case with KDM4C deletion revealed reduced KDM4C protein expression and altered histone methylation patterns. In conclusion, this study strengthens the evidence for associations between KDM4C CNVs and these two disorders and for their potential functional effect on histone methylation patterns.

DOI： 10.1038/s41398-020-01107-7

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その他リンク： http://www.nature.com/articles/s41398-020-01107-7

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/s11689-020-09325-2

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その他リンク： http://link.springer.com/article/10.1186/s11689-020-09325-2/fulltext.html

記述言語：英語   出版者・発行元：Nature Neuroscience  

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

DOI： 10.1038/s41593-020-0681-z

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記述言語：日本語   出版者・発行元：日本神経精神薬理学会・日本生物学的精神医学会・日本精神薬学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Schizophrenia (SCZ) is known to be a heritable disorder; however, its multifactorial nature has significantly hampered attempts to establish its pathogenesis. Therefore, in this study, we performed genome-wide copy-number variation (CNV) analysis of 2940 patients with SCZ and 2402 control subjects and identified a statistically significant association between SCZ and exonic CNVs in the ARHGAP10 gene. ARHGAP10 encodes a member of the RhoGAP superfamily of proteins that is involved in small GTPase signaling. This signaling pathway is one of the SCZ-associated pathways and may contribute to neural development and function. However, the ARHGAP10 gene is often confused with ARHGAP21, thus, the significance of ARHGAP10 in the molecular pathology of SCZ, including the expression profile of the ARHGAP10 protein, remains poorly understood. To address this issue, we focused on one patient identified to have both an exonic deletion and a missense variant (p.S490P) in ARHGAP10. The missense variant was found to be located in the RhoGAP domain and was determined to be relevant to the association between ARHGAP10 and the active form of RhoA. We evaluated ARHGAP10 protein expression in the brains of reporter mice and generated a mouse model to mimic the patient case. The model exhibited abnormal emotional behaviors, along with reduced spine density in the medial prefrontal cortex (mPFC). In addition, primary cultured neurons prepared from the mouse model brain exhibited immature neurites in vitro. Furthermore, we established induced pluripotent stem cells (iPSCs) from this patient, and differentiated them into tyrosine hydroxylase (TH)-positive neurons in order to analyze their morphological phenotypes. TH-positive neurons differentiated from the patient-derived iPSCs exhibited severe defects in both neurite length and branch number; these defects were restored by the addition of the Rho-kinase inhibitor, Y-27632. Collectively, our findings suggest that rare ARHGAP10 variants may be genetically and biologically associated with SCZ and indicate that Rho signaling represents a promising drug discovery target for SCZ treatment.

DOI： 10.1038/s41398-020-00917-z

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その他リンク： http://www.nature.com/articles/s41398-020-00917-z

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:sec><jats:title>Objective</jats:title><jats:p>Neurodevelopmental disorders (NDDs) often associate with epilepsy or craniofacial malformations. Recent large‐scale DNA analyses identified hundreds of candidate genes for NDDs, but a large portion of the cases still remain unexplained. We aimed to identify novel candidate genes for NDDs.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>We performed exome sequencing of 95 patients with NDDs including 51 with trigonocephaly and subsequent targeted sequencing of additional 463 NDD patients, functional analyses of variant <jats:italic>in vitro,</jats:italic> and evaluations of autism spectrum disorder (ASD)‐like phenotypes and seizure‐related phenotypes <jats:italic>in vivo</jats:italic>.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>We identified <jats:italic>de novo</jats:italic> truncation variants in nine novel genes; <jats:italic>CYP1A1</jats:italic>, <jats:italic>C14orf119</jats:italic>, <jats:italic>FLI1</jats:italic>, <jats:italic>CYB5R4</jats:italic>, <jats:italic>SEL1L2, RAB11FIP2, ZMYND8, ZNF143,</jats:italic> and <jats:italic>MSX2. MSX2</jats:italic> variants have been described in patients with cranial malformations, and our present patient with the <jats:italic>MSX2 de novo</jats:italic> truncation variant showed cranial meningocele and partial epilepsy. MSX2 protein is known to be ubiquitinated by an E3 ubiquitin ligase PJA1, and interestingly we found a <jats:italic>PJA1</jats:italic> hemizygous p.Arg376Cys variant recurrently in seven Japanese NDD patients; five with trigonocephaly and one with partial epilepsy, and the variant was absent in 886 Japanese control individuals. <jats:italic>Pja1</jats:italic> knock‐in mice carrying p.Arg365Cys, which is equivalent to p.Arg376Cys in human, showed a significant decrease in PJA1 protein amount, suggesting a loss‐of‐function effect of the variant. <jats:italic>Pja1</jats:italic> knockout mice displayed moderate deficits in isolation‐induced ultrasonic vocalizations and increased seizure susceptibility to pentylenetetrazole.</jats:p></jats:sec><jats:sec><jats:title>Interpretation</jats:title><jats:p>These findings propose novel candidate genes including <jats:italic>PJA1</jats:italic> and <jats:italic>MSX2</jats:italic> for NDDs associated with craniofacial abnormalities and/or epilepsy.</jats:p></jats:sec>

DOI： 10.1002/acn3.51093

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/acn3.51093

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Introduction A history of major depressive disorder before pregnancy is one risk factor for peripartum depression. Therefore, the purpose of the present study was to examine the validation and factor structure of the Japanese version of the Inventory to Diagnose Depression, Lifetime version (IDDL) for pregnant women. Methods The study participants were 556 pregnant women. Factor analysis was performed to identify the factor structure, construct validity was examined based on the results of the factor analysis, and reliability was examined using Cronbach's α coefficient. Results Based on the results of the factor analysis of the IDDL, a bifactor model composed of a single general dimension along with the following five factors was extracted: (1) depression, anxiety, and irritability (items 1, 2, 8-10, and 19-21); (2) retardation, decreased concentration, indecisiveness, and insomnia (items 4, 11, 12, and 17); (3) decrease in appetite/significant weight loss (items 13 and 14); (4) increase in appetite/significant weight gain (items 15 and 16); and (5) diminished interest, pleasure, and libido (items 5-7). Cronbach's α coefficients for these five factors were as follows: 0.910, 0.815, 0.780, 0.683, and 0.803, respectively. Conclusions The reliability, construct validity, and factor structure of the Japanese version of the IDDL were confirmed in pregnant women.

DOI： 10.1371/journal.pone.0234240

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Frontiers in Psychiatry  

Introduction: The aim of the present study was to elucidate the foreseeable risk factors for suicidal ideation among Japanese perinatal women. Methods: This cohort study was conducted in Nagoya, Japan, from July 2012 to March 2018. The Edinburgh Postnatal Depression Scale (EPDS) questionnaire was conducted at four time points: early pregnancy, late pregnancy, 5 days postpartum, and 1 month postpartum. A total of 430 women completed the questionnaires. A logistic regression analysis was performed using the presence of suicidal ideation on the EPDS as an objective variable. The explanatory variables were age, presence of physical or mental disease, smoking and drinking habits, education, hospital types, EPDS total score in early pregnancy, bonding, and quality and amount of social support, as well as the history of major depressive disorder (MDD). Results: The rate of participants who were suspected of having suicidal ideation at any of the four time points was 11.6% (n=52), with the highest (n=25, 5.8%) at late pregnancy. For suicidal ideation, education level (OR: 1.19; 95% CI: 1.00–1.41; p=0.047), EPDS total points in the pregnancy period (OR: 1.25; 95% CI: 1.16–1.34; p < 0.000), a history of MDD (OR: 2.16; 95% CI: 1.00–4.79; p=0.049), and presence of mental disease (OR: 2.39; 95% CI: 1.00–5.70; p=0.049) were found to be risk factors for suicidal ideation. Age [odds ratio (OR): 0.88; 95% confidence interval (CI): 0.80–0.95; p=.002] and quality of social support (OR: 0.77; 95% CI: 0.60–0.99; p=.041) were found to be protective factors. Conclusion: Based on these results, effective preventive interventions, such as increasing the quality of social support and confirming the history of depression, should be carried out in pregnant depressive women at the early stage of the perinatal period.

DOI： 10.3389/fpsyt.2020.00441

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>A Japanese individual with schizophrenia harboring a novel exonic deletion in <jats:italic>RELN</jats:italic> was recently identified by genome‐wide copy‐number variation analysis. Thus, the present study aimed to generate and analyze a model mouse to clarify whether <jats:italic>Reln</jats:italic> deficiency is associated with the pathogenesis of schizophrenia.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>A mouse line with a novel <jats:italic>RELN</jats:italic> exonic deletion (<jats:italic>Reln</jats:italic>‐del) was established using the CRISPR/Cas9 method to elucidate the underlying molecular mechanism. Subsequently, general behavioral tests and histopathological examinations of the model mice were conducted and phenotypic analysis of the cerebellar granule cell migration was performed.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>The phenotype of homozygous <jats:italic>Reln</jats:italic>‐del mice was similar to that of <jats:italic>reeler</jats:italic> mice with cerebellar atrophy, dysplasia of the cerebral layers, and abrogated protein levels of cerebral reelin. The expression of reelin in heterozygous <jats:italic>Reln</jats:italic>‐del mice was approximately half of that in wild‐type mice. Conversely, behavioral analyses in heterozygous <jats:italic>Reln</jats:italic>‐del mice without cerebellar atrophy or dysplasia showed abnormal social novelty in the three‐chamber social interaction test. <jats:italic>In vitro</jats:italic> reaggregation formation and neuronal migration were severely altered in the cerebellar cultures of homozygous <jats:italic>Reln</jats:italic>‐del mice.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>The present results in novel <jats:italic>Reln</jats:italic>‐del mice modeled after our patient with a novel exonic deletion in <jats:italic>RELN</jats:italic> are expected to contribute to the development of reelin‐based therapies for schizophrenia.</jats:p></jats:sec>

DOI： 10.1111/pcn.12993

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMC Psychiatry  

Background: This paper is a systematic review and meta-analysis of the efficacy of available medications for the treatment of restricted/repetitive behavior (RRBs) in Autism Spectrum Disorder (ASD). Method: We searched MEDLINE, Embase, PsycINFO, The Cochrane Library (Cochrane Database of Systematic Reviews (CDRS), the Cochrane Central Register of Controlled Trials (CENTRAL), database of Abstracts of Reviews of Effects (DARE)), Scopus, Epistimonikos, Clinicaltrials.gov, and included all randomized controlled trials published after 1993 that were directed at RRBs in patients with ASD of all ages. We extracted the relevant data from the published studies with a predefined data extraction form and assessed the risk of bias. The primary outcomes were change in restricted/repetitive behavior. We performed a meta-analysis using the random effect model and included studies with given mean and standard deviation. This study is registered with PROSPERO number CRD42018092660). Results: We identified 14 randomized controlled trials that met initial inclusion criteria. After closer inspection, nine trials-involving 552 patients in total-were included in the final analysis. The meta-analysis found no significant difference between medications (including fluvoxamine, risperidone, fluoxetine, citalopram, oxytocin, N-Acetylcysteine, buspirone) and placebo in the treatment of RRBs in ASD (P = 0.20). Similarly, the sub-group meta-analysis also showed no significant difference between Selective Serotonin Reuptake Inhibitor (SSRIs) and placebo in the treatment of RRBs in ASD (P = 0.68). There was no evidence of publication bias. Conclusion: This meta-analysis finds little support for the routine use of medications to treat restricted/repetitive behaviors in Autism Spectrum Disorder. Further research of large, balanced trials with precise assessment tools and long-term follow-up are needed. Trial registration: The study protocol is registered in PROSPERO (Reference number: CRD42018092660).

DOI： 10.1186/s12888-020-2477-9

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cell.2019.12.036

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

Genetic studies have identified rare RELN variants as risk factors for psychiatric disorders. However, additional genetic factors appear to be necessary for disease onset. Detailed genetic information and the use of patient-derived neuronal cells may thus enable to discover these disease-related additional factors. Here, we performed whole-genome sequencing of a schizophrenia patient with a rare RELN deletion and his healthy mother, and examined the phenotypes of 3D-cultured neuronal cells derived from induced pluripotent stem cells of this patient. Our results revealed that, along with the RELN deletion, neuronal death was promoted in this patient; thus, neuronal death may be a vulnerable factor for schizophrenia.

DOI： 10.1016/j.schres.2019.10.038

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Informa UK Limited  

Background: The Drug-Induced Extrapyramidal Symptoms Scale (DIEPSS) is a multidimensional rating scale designed for the fast, easy and reliable assessment of extrapyramidal symptoms (EPSs) induced by antipsychotics. Aim: The aim of this study was to validate the level of inter-rater and test–retest reliability of the Norwegian translation of this scale. Methods: A total of 125 video clips showing a variety of or no signs of EPSs were used in the present study. The participants recorded were Japanese psychiatric patients receiving first- and/or second-generation antipsychotics. A total of 103 patients (47 males and 56 females), diagnosed with schizophrenia (n = 68) or mood disorders (n = 35) appeared in the video clips. Their mean age was 48.7 ± 16.3 years (range 18–80) at the time of video recording. Inter-rater agreement was assessed with five raters and test–retest reliability with three. Results: Inter-rater reliability analyses showed interclass correlation coefficients (ICCs) ranging from 0.74 to 0.93 for each individual item. Test–retest reliability analysed independently for each rater ranged from 0.71 to 0.96. Conclusions: Inter-rater and test–retest agreement exhibited satisfactory ICC levels above 0.70. The Norwegian version of the DIEPSS is a reliable instrument for the assessment of drug-induced EPSs.

DOI： 10.1080/08039488.2019.1665708

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3389/fpsyt.2019.00515

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Oxford University Press (OUP)  

Genome-wide association studies (GWASs) have identified >100 susceptibility loci for schizophrenia (SCZ) and demonstrated that SCZ is a polygenic disorder determined by numerous genetic variants but with small effect size. We conducted a GWAS in the Japanese (JPN) population (a) to detect novel SCZ-susceptibility genes and (b) to examine the shared genetic risk of SCZ across (East Asian [EAS] and European [EUR]) populations and/or that of trans-diseases (SCZ, bipolar disorder [BD], and major depressive disorder [MDD]) within EAS and between EAS and EUR (trans-diseases/populations). Among the discovery GWAS subjects (JPN-SCZ GWAS: 1940 SCZ cases and 7408 controls) and replication dataset (4071 SCZ cases and 54 479 controls), both comprising JPN populations, 3 novel susceptibility loci for SCZ were identified: SPHKAP (Pbest = 4.1 × 10−10), SLC38A3 (Pbest = 5.7 × 10−10), and CABP1-ACADS (Pbest = 9.8 × 10−9). Subsequent meta-analysis between our samples and those of the Psychiatric GWAS Consortium (PGC; EUR samples) and another study detected 12 additional susceptibility loci. Polygenic risk score (PRS) prediction revealed a shared genetic risk of SCZ across populations (Pbest = 4.0 × 10−11) and between SCZ and BD in the JPN population (P ~ 10−40); however, a lower variance-explained was noted between JPN-SCZ GWAS and PGC-BD or MDD within/across populations. Genetic correlation analysis supported the PRS results; the genetic correlation between JPN-SCZ and PGC-SCZ was ρ = 0.58, whereas a similar/ lower correlation was observed between the trans-diseases (JPN-SCZ vs JPN-BD/EAS-MDD, rg = 0.56/0.29) or trans-diseases/populations (JPN-SCZ vs PGC-BD/MDD, ρ = 0.38/0.12). In conclusion, (a) Fifteen novel loci are possible susceptibility genes for SCZ and (b) SCZ “risk” effect is shared with other psychiatric disorders even across populations.

DOI： 10.1093/schbul/sby140

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMC Psychiatry  

Background: Postpartum depression (PPD) is a major depressive disorder that occurs after childbirth. Objective diagnostic and predictive methods for PPD are important for early detection and appropriate intervention. DNA methylation has been recognized as a potential biomarker for major depressive disorder. In this study, we used methylation analysis and peripheral blood to search for biomarkers that could to lead to the development a predictive method for PPD. Methods: Study participants included 36 pregnant women (18 cases and 18 controls determined after childbirth). Genome-wide DNA methylation profiles were obtained by analysis with an Infinium Human Methylation 450BeadChip. The association of DNA methylation status at each DNA methylation site with PPD was assessed using linear regression analysis. We also conducted functional enrichment analysis of PPD using The Database for Annotation, Visualization and Integrated Discovery 6.8 to explore enriched functional-related gene groups for PPD. Results: In the analysis with postpartum depressed state as an independent variable, the difference in methylation frequency between the postpartum non-depressed group and the postpartum depressed group was small, and sites with genome-wide significant differences were not confirmed. After analysis by The Database for Annotation, Visualization and Integrated Discovery 6.8, we revealed four gene ontology terms, including axon guidance, related to postpartum depression. Conclusions: These findings may help with the development of an objective predictive method for PPD.

DOI： 10.1186/s12888-019-2172-x

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Research in Developmental Disabilities  

Background: New classification system Diagnostic and statistical manual of mental disorders. 5th ed.(DSM – 5) includes sensory problems as one of the symptoms in diagnostic profile of Autism Spectrum Disorder (ASD). Researching the effects of sensory integration treatment may improve new approaches to the individuals with ASD. The objective of this study is to determine the effects of Snoezelen, multisensory environment on the severity of ASD and stereotyped/repetitive behaviours in adolescents and adults using CARS scale. Method: The study involved 40 subjects with ASD associated with intellectual difficulties of both sexes, aged 15–35. The subjects were randomly divided into two groups: a control one (without treatment) and an experimental one (with treatment). The assessments were rated by CARS (Childhood Autism Rating Scale) before and after the three-month treatment. Results: In the experimental group, there was a statistically significant difference of the total CARS score before and after the treatment (p < 0.0005). Comparing the results of both experimental and control groups, a statistically significant difference was found on total CARS score (p < 0.0005). Conslusion: The results in the present study indicate that the continual sessions in Snoezelen room had effects on reducing severity of ASD and repetitive and stereotyped behaviours on CARS scale.

DOI： 10.1016/j.ridd.2019.03.007

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記述言語：日本語   出版者・発行元：(公社)日本精神神経学会  

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記述言語：日本語   出版者・発行元：(公社)日本精神神経学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

The original Article required a few updates; one co-author name, which was given as Hiroki Kiumura, has been updated to Hiroki Kimura. Furthermore, supplementary information has been updated, and grant numbers have been added. These updates have been made to both the PDF and HTML versions of this Article.

DOI： 10.1038/s41398-019-0479-5

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nagoya journal of medical science  

In a world of increasing academic mobility, most universities seek to give their students opportunities to experience education in different countries, which is especially true for senior research students. The Nagoya University Graduate School of Medicine started a joint degree program (JDP) for PhD students with the University of Adelaide, Faculty of Health Science (Australia) in 2015 and with Lund University Faculty of Medicine (Sweden) in 2017. Furthermore, we have started a new JDP with the University of Freiburg, Faculty of Medicine (Germany) in 2018. This article reports the issues specific to counterpart medical schools, including student's recruitment, the curriculum, and the general differences between each schools. JDPs are not only important for educational collaboration, but also as a strategy to encourage international research collaboration, which is a core criterion to a university's world-ranking reputation. Acquiring knowledge about educational strategies that are implemented in different foreign medical schools represents a unique opportunity to improve our own curriculum.

DOI： 10.18999/nagjms.81.2.183

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Majority of head and neck cancer (HNC) patients are male, and more than 85% of patients with HNC have the habit of smoking and drinking. Due to the specific demographic characteristics, HNC patients are anticipated to have specific coping styles, affecting psychological distress, survival, and quality of life. We explored the subscales of the Mental Adjustment to Cancer (MAC) Scale in male patients with HNC, and then examined the correlation between revised subscales of the MAC scale and anxiety/depression. Participants were 150 male inpatients with HNC, and their demographic and medical data were obtained. Coping style was assessed by MAC scale. Anxiety and depression were assessed using the Hospital Anxiety and Depression Scale. Out of 40 items in the original MAC scale, 19 items were excluded by factor analysis, and the remaining 21 items were divided into three factors: Negative Adjustment, Positive Adjustment, and Abandonment. Negative and Positive Adjustments were similar to the copings of mixed gender patients with heterogeneous cancers, and Abandonment was a new subscale specific to male patients with HNC. This subscale had a weak positive correlation with anxiety and depression. Male HNC patients revealed a specific coping style of Abandonment, related with psychological distress. We believe that an understanding of the Abandonment coping style revealed in our study will improve the psychological support offered to male patients with HNC.

DOI： 10.18999/nagjms.81.2.249

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Although a number of studies have identified several convincing candidate genes or molecules, the pathophysiology of schizophrenia (SCZ) has not been completely elucidated. Therapeutic optimization based on pathophysiology should be performed as early as possible to improve functional outcomes and prognosis; to detect useful biomarkers for SCZ, which reflect pathophysiology and can be utilized for timely diagnosis and effective therapy. To explore biomarkers for SCZ, we employed fluorescence two-dimensional differential gel electrophoresis (2D-DIGE) of lymphoblastoid cell lines (LCLs) (1st sample set: 30 SCZ and 30 CON). Differentially expressed proteins were sequenced by liquid chromatography tandem-mass spectrometry (LC-MS/MS) and identified proteins were confirmed by western blotting (WB) (1st and 2nd sample set: 60 SCZ and 60 CON). Multivariate logistic regression analysis was performed to identify an optimal combination of biomarkers to create a prediction model for SCZ. Twenty protein spots were differentially expressed between SCZ and CON in 2D-DIGE analysis and 22 unique proteins were identified by LC-MS/MS. Differential expression of eight of 22 proteins was confirmed by WB. Among the eight candidate proteins (HSPA4L, MX1, GLRX3, UROD, MAPRE1, TBCB, IGHM, and GART), we successfully constructed logistic regression models comprised of 4- and 6-markers with good discriminative ability between SCZ and CON. In both WB and gene expression analysis of LCL, MX1 showed reproducibly significant associations. Moreover, Mx1 and its related proinflamatory genes (Mx2, Il1b, and Tnf) were also up-regulated in poly I:C-treated mice. Differentially expressed proteins might be associated with molecular pathophysiology of SCZ, including dysregulation of immunological reactions and potentially provide diagnostic and prognostic biomarkers.

DOI： 10.1038/s41398-019-0461-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.euroneuro.2017.08.415

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Early detection of perinatal depression is an urgent issue. Our study aimed to examine the construct validity and factor structure of the Japanese version of the Edinburgh Postnatal Depression Scale (EPDS) from a prospective cohort study from pregnancy to postpartum. A total of 1075 women completed all items of the EPDS at four time points: early pregnancy, late pregnancy, 5 days postpartum and 1 month postpartum. The participants were randomly divided into two sample sets. The first sample set (n = 304) was used for exploratory factor analysis, and the second sample set (n = 771) was used for confirmatory factor analysis. As a result, the Cronbach’s alpha coefficients of the EPDS items were 0.762, 0.740, 0.765 and 0.772 at the four time points. From the confirmatory factor analysis of the EPDS in a sample set of Japanese women from pregnancy to postpartum, the following three factors were detected: depression (items 7, 9), anxiety (items 4, 5) and anhedonia (items 1, 2). In conclusion, the EPDS is a useful rating scale, and its factor structure is consistently stable during the whole peripartum period.

DOI： 10.1038/s41598-018-36101-z

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:sec><jats:label /><jats:p>Myelinated axons segregate the axonal membrane into four defined regions: the node of Ranvier, paranode, juxtaparanode, and internode. The paranodal junction consists of specific component proteins, such as neurofascin155 (<jats:styled-content style="fixed-case">NF</jats:styled-content>155) on the glial side, and Caspr and Contactin on the axonal side. Although paranodal junctions are thought to play crucial roles in rapid saltatory conduction and nodal assembly, the role of their interaction with neurons is not fully understood. In a previous study, conditional <jats:italic><jats:styled-content style="fixed-case">NF</jats:styled-content>155</jats:italic> knockout in oligodendrocytes led to disorganization of the paranodal junctions. To examine if disruption of paranodal junctions affects neuronal gene expression, we prepared total <jats:styled-content style="fixed-case">RNA</jats:styled-content> from the retina of <jats:italic><jats:styled-content style="fixed-case">NF</jats:styled-content>155</jats:italic> conditional knockout, and performed expression analysis. We found that the expression level of 433 genes changed in response to paranodal junction ablation. Interestingly, expression of <jats:italic>aquaporin 3</jats:italic> (<jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic>) was significantly reduced in <jats:italic><jats:styled-content style="fixed-case">NF</jats:styled-content>155</jats:italic> conditional knockout mice, but not in cerebroside sulfotransferase knockout (<jats:italic><jats:styled-content style="fixed-case">CST</jats:styled-content>‐<jats:styled-content style="fixed-case">KO</jats:styled-content></jats:italic>) mice, whose paranodes are not originally formed during development. Copy number variations have an important role in the etiology of schizophrenia (<jats:styled-content style="fixed-case">SCZ</jats:styled-content>). We observed rare duplications of <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic> in <jats:styled-content style="fixed-case">SCZ</jats:styled-content> patients, suggesting a correlation between abnormal <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic> expression and <jats:styled-content style="fixed-case">SCZ</jats:styled-content>. To determine if <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic> over‐expression in <jats:italic><jats:styled-content style="fixed-case">NF</jats:styled-content>155</jats:italic> conditional knockout mice influences neuronal function, we performed adeno‐associated virus (<jats:styled-content style="fixed-case">AAV</jats:styled-content>)‐mediated over‐expression of <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic> in the motor cortex of mice and found a significant increase in caspase 3‐dependent neuronal apoptosis in <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic>‐transduced cells. This study may provide new insights into therapeutic approaches for <jats:styled-content style="fixed-case">SCZ</jats:styled-content> by regulating <jats:italic><jats:styled-content style="fixed-case">AQP</jats:styled-content>3</jats:italic> expression, which is associated with paranodal disruption.</jats:p></jats:sec><jats:sec><jats:label /><jats:p>
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DOI： 10.1111/jnc.14553

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Psychiatric Genetics  

Enhanced carbonyl stress has been observed in a subgroup of patients with schizophrenia. Glyoxalase I, which is encoded by GLO1, is an enzyme that protects against carbonyl stress. In this study, we focused on the association between rare genetic variants of GLO1 and schizophrenia. First, we identified one heterozygous frameshift variant, p.P122fs, in 370 Japanese schizophrenia cases with allele frequencies of up to 1% by exon-targeted mutation screening of GLO1. We then performed an association analysis on 1282 cases and 1764 controls with this variant. The variant was found in three cases and eight controls. There was no statistically significant association between p.P122fs in GLO1 and schizophrenia (P=0.25). This frameshift variant in GLO1 might occur at near-polymorphic frequencies in the Japanese population, although further investigations using larger samples and biological analyses are needed to exclude the possibility of a low-penetrance genetic risk associated with this variant.

DOI： 10.1097/YPG.0000000000000204

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

<jats:p>Oncolytic viral therapy has been accepted as a standard immunotherapy since talimogene laherparepvec (T-VEC, Imlygic®) was approved by the Food and Drug Administration (FDA) and European Medicines Agency (EMA) for melanoma treatment in 2015. Various oncolytic viruses (OVs), such as HF10 (Canerpaturev—C-REV) and CVA21 (CAVATAK), are now actively being developed in phase II as monotherapies, or in combination with immune checkpoint inhibitors against melanoma. Moreover, in glioma, several OVs have clearly demonstrated both safety and a promising efficacy in the phase I clinical trials. Additionally, the safety of several OVs, such as pelareorep (Reolysin®), proved their safety and efficacy in combination with paclitaxel in breast cancer patients, but the outcomes of OVs as monotherapy against breast cancer have not provided a clear therapeutic strategy for OVs. The clinical trials of OVs against pancreatic cancer have not yet demonstrated efficacy as either monotherapy or as part of combination therapy. However, there are several oncolytic viruses that have successfully proved their efficacy in different preclinical models. In this review, we mainly focused on the oncolytic viruses that transitioned into clinical trials against melanoma, glioma, pancreatic, and breast cancers. Hence, we described the current status and future prospects of OVs clinical trials against melanoma, glioma, pancreatic, and breast cancers.</jats:p>

DOI： 10.3390/cancers10100356

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Psychiatric Research  

Background: Although previous studies have reported associations between bonding failure, depression, social support among mothers, and perceived rearing, the causal relationships remain unclear. Methods: A total of 855 women (mean age, 32.4 ± 4.4 years) completed the Mother-Infant Bonding Questionnaire (MIBQ), the Edinburgh Postnatal Depression Scale (EPDS), the Japanese version of the Social Support Questionnaire, and the Parental Bonding Instrument in early pregnancy before week 25 (T1) and at 1 month after delivery (T2). We created a path model to clarify the causal relationships between perinatal bonding failure, depression, social support, and perceived rearing during pregnancy and at 1 month after delivery. The model was tested using structural equation modeling. Results: Our recursive model showed acceptable fit (chi-squared statistic/degree of freedom = 2.1, comparative fit index = 0.98, root mean square error of approximation = 0.04). It was revealed that: (1) at T1, higher overprotection significantly predicted MIBQ scores; (2) at T1, poorer social support significantly predicted both MIBQ and EPDS scores; and (3) at T1, both MIBQ and EPDS scores significantly predicted respective scores at T2. Conclusions: These results showed that bonding failure in the postpartum period was significantly influenced by mothers’ own perceived rearing and social support during pregnancy. In addition, depression in the postpartum period was strongly influenced by social support during pregnancy. These findings suggest that psychosocial interventions that focus on both mothers’ recollections of their own upbringing and social support during pregnancy are effective for preventing bonding failure and depression in the postpartum period.

DOI： 10.1016/j.jpsychires.2018.09.001

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Cell Reports  

Compelling evidence in Caucasian populations suggests a role for copy-number variations (CNVs) in autism spectrum disorder (ASD) and schizophrenia (SCZ). We analyzed 1,108 ASD cases, 2,458 SCZ cases, and 2,095 controls in a Japanese population and confirmed an increased burden of rare exonic CNVs in both disorders. Clinically significant (or pathogenic) CNVs, including those at 29 loci common to both disorders, were found in about 8% of ASD and SCZ cases, which was significantly higher than in controls. Phenotypic analysis revealed an association between clinically significant CNVs and intellectual disability. Gene set analysis showed significant overlap of biological pathways in both disorders including oxidative stress response, lipid metabolism/modification, and genomic integrity. Finally, based on bioinformatics analysis, we identified multiple disease-relevant genes in eight well-known ASD/SCZ-associated CNV loci (e.g., 22q11.2, 3q29). Our findings suggest an etiological overlap of ASD and SCZ and provide biological insights into these disorders. Kushima et al. perform comparative analyses of CNVs in ASD and SCZ in a Japanese population. They identify pathogenic CNVs and biological pathways in each disorder with significant overlap. Patients with pathogenic CNVs have a higher prevalence of intellectual disability. Disease-relevant genes are detected in eight well-known ASD/SCZ-associated CNV loci.

DOI： 10.1016/j.celrep.2018.08.022

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.pscychresns.2018.06.007

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Reelin protein (RELN), an extracellular matrix protein, plays multiple roles that range from embryonic neuronal migration to spine formation in the adult brain. Results from genetic studies have suggested that RELN is associated with the risk of psychiatric disorders, including schizophrenia (SCZ). We previously identified a novel exonic deletion of RELN in a patient with SCZ. High-resolution copy number variation analysis revealed that this deletion included exons 52 to 58, which truncated the RELN in a similar manner to the Reln Orleans mutation (Relnrl-Orl). We examined the clinical features of this patient and confirmed a decreased serum level of RELN. To elucidate the pathophysiological role of the exonic deletion of RELN in SCZ, we conducted behavioral and neurochemical analyses using heterozygous Relnrl-Orl/+ mice. These mice exhibited abnormalities in anxiety, social behavior, and motor learning; the deficits in motor learning were ameliorated by antipsychotics. Methamphetamine-induced hyperactivity and dopamine release were significantly reduced in the Relnrl-Orl/+ mice. In addition, the levels of GABAergic markers were decreased in the brain of these mice. Taken together, our results suggest that the exonic deletion of RELN plays a pathological role, implicating functional changes in the dopaminergic and GABAergic systems, in the pathophysiology of SCZ.

DOI： 10.1038/s41598-018-31390-w

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

This study aimed to assess the situation of postpartum depression and maternal bonding in Nagoya, a city distant from the epicenter of the Great East Japan Earthquake that occurred on March 11, 2011. Among the participants at 1 month after childbirth between March 11, 2010 and March 10, 2013 (n = 188), 152 fully responded to the Edinburgh Postnatal Depression Scale (EPDS) and Mother–Infant Bonding Questionnaire (MIBQ). They were divided into pre-quake (n = 58), and 0–6, 6–12, 12–18, and 18–24 months after the earthquake groups (n = 20, 26, 29, and 19, respectively). The rate of mothers who scored above the cutoff point for the EPDS increased from 12.1% in the pre-quake to 35.0% in the 0–6 months group (p = 0.022). The EPDS total and anxiety subscale scores (mean ± standard error) were also significantly different between the pre-quake and 0–6 months after the earthquake groups (4.45 ± 0.50 vs. 7.95 ± 1.47, p = 0.024; 2.16 ± 0.26 vs. 3.65 ± 0.57, p = 0.021, respectively). The EPDS total and anxiety scores were the highest for the 0–6 months group, followed by the 6–12, 12–18, 18–24 months groups (p = 0.019, p = 0.022). MIBQ scores did not differ between the pre-quake and 0–6 months groups. Depressive symptoms, mainly explained by anxiety, increased after the earthquake with no changes in maternal bonding.

DOI： 10.1038/s41598-018-30065-w

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

Reelin is a protein encoded by the RELN gene that controls neuronal migration in the developing brain. Human genetic studies suggest that rare RELN variants confer susceptibility to mental disorders such as schizophrenia. However, it remains unknown what effects rare RELN variants have on human neuronal cells. To this end, the analysis of human neuronal dynamics at the single-cell level is necessary. In this study, we generated human-induced pluripotent stem cells carrying a rare RELN variant (RELN-del) using targeted genome editing; cells were further differentiated into highly homogeneous dopaminergic neurons. Our results indicated that RELN-del triggered an impaired reelin signal and decreased the expression levels of genes relevant for cell movement in human neurons. Single-cell trajectory analysis revealed that control neurons possessed directional migration even in vitro, while RELN-del neurons demonstrated a wandering type of migration. We further confirmed these phenotypes in neurons derived from a patient carrying the congenital RELN-del. To our knowledge, this is the first report of the biological significance of a rare RELN variant in human neurons based on individual neuron dynamics. Collectively, our approach should be useful for studying reelin function and evaluating mental disorder susceptibility, focusing on individual human neuronal migration.

DOI： 10.1038/s41398-018-0177-8

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>Although the effects of psychotropics on driving ability have received much attention, little research is available on driving performance of stable outpatients with depression undergoing real‐world treatment. This observational study investigated driving performance, cognitive functions, and depressive symptomatology of partly remitted outpatients with depression under daily‐practice psychopharmacologic treatment.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Seventy stable outpatients with depression and 67 healthy volunteers were enrolled. Patients’ prescriptions were not controlled in order to capture the real‐world treatment environment. Participants underwent three driving tasks – road‐tracking, car‐following, and harsh‐braking – using a driving simulator, and three cognitive tasks – Continuous Performance Test, Wisconsin Card Sorting Test, and Trail‐Making Test. The Symptom Assessment Scale – Structured Interview Guide for the Hamilton Depression Rating Scale, Beck Depression Inventory‐II, Social Adaptation Self‐Evaluation Scale, and Stanford Sleepiness Scale were also completed.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Although many patients received various pharmacologic treatments, there were no significant differences in the three driving tasks between outpatients with depression and healthy controls. Difficulty of maintaining set in the Wisconsin Card Sorting Test was significantly increased in patients with depression. Results on the Social Adaptation Self‐Evaluation Scale were significantly associated with road‐tracking and car‐following performance, in contrast to results on the Hamilton Depression Rating Scale and the Beck Depression Inventory‐II.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>We conclude that partly remitted depressive patients under steady‐state pharmacologic treatment do not differ from healthy controls with respect to driving performance, which seems to be more affected by psychosocial functioning than by pharmacologic agents. This, however, should be investigated systematically in an off/on study.</jats:p></jats:sec>

DOI： 10.1111/pcn.12648

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:p>Migfilin, encoded by <jats:italic>FBLIM1</jats:italic> at the 1p36 locus, is a multi‐domain adaptor protein essential for various cellular processes such as cell morphology and migration. Small deletions and duplications at the 1p36 locus, monosomy of which results in neurodevelopmental disorders and multiple congenital anomalies, have also been identified in patients with autism spectrum disorder (ASD). However, the impact of <jats:italic>FBLIM1</jats:italic>, the gene within 1p36, on the pathogenesis of ASD is unknown. In this study, we performed morphological analyses of migfilin to elucidate its role in brain development. Migfilin was detected specifically in the embryonic and perinatal stages of the mouse brain. Either silencing or overexpression of migfilin in embryos following in utero electroporation disrupted Neocortical neuronal migration. Additionally, neurite elongation was impaired when migfilin was silenced in cultured mouse hippocampal neurons. We then screened <jats:italic>FBLIM1</jats:italic> for rare exonic deletions/duplications in 549 Japanese ASD patients and 824 controls, detecting one case of ASD and intellectual delay that harbored a 26‐kb deletion at 1p36.21 that solely included the C‐terminal exon of <jats:italic>FBLIM1</jats:italic>. The <jats:italic>FBLIM1</jats:italic> mRNA expression level in this case was reduced compared to levels in individuals without <jats:italic>FBLIM1</jats:italic> deletion. Our findings indicate that tightly regulated expression of migfilin is essential for neuronal development and that <jats:italic>FBLIM1</jats:italic> disruption may be related to the phenotypes associated with ASD and related neurodevelopmental disorders.</jats:p>

DOI： 10.1002/jnr.24194

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Oxford University Press (OUP)  

Background: Adenosine kinase (ADK) is supposed to be a schizophrenia susceptibility gene based on the findings that ADK is an enzyme that catalyzes transfer of the gamma-phosphate from ATP to adenosine, which interacts with dopamine and glutamate neurotransmitters. However, no reports of schizophrenia cases with loss of function variants in the ADK region have been published. In our previous study investigating copy number variants in schizophrenia, we detected a copy number variant in the ADK region in 1 of 1699 schizophrenia patients. Methods: We validated the ADK deletion by determining the breakpoint. Then, we compared the relative expression of ADK in 32 schizophrenia patients, including a schizophrenia patient with deletion of ADK, with 29 healthy controls using lymphoblastoid cell lines. Furthermore, we evaluated the clinical phenotypes of the schizophrenia with ADK deletion. Result: We validated the copy number variants with Sanger sequencing and predicted that this copy number variant results in loss of function of ADK. Furthermore, expression analysis of mRNA from peripheral blood in this schizophrenia patient with the ADK deletion showed an extremely low level of ADK. Here we describe a case report of a patient with ADK deletion with phenotypes (schizophrenia, parkinsonism, epilepsy) that are predicted when ADK function is disrupted. Conclusion: Considering that the patient had a low ADK mRNA level and showed a phenotype that may be related to ADK deficiency, the copy number variants in the region of ADK may be strongly related to the phenotypes described here, such as schizophrenia, Parkinsonism, and epilepsy.

DOI： 10.1093/ijnp/pyx103

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掲載種別：研究論文（学術雑誌）  

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掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Neural Transmission  

The authors present a narrative review from the diagnostic and nosologic viewpoints of mood disorders (bipolar and depressive ones) by revisiting the revision from the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders, Text Revision to DSM-5, including the following: the separation of the bipolar and depressive sections; the addition of increased energy and continuation of symptoms to the hypo/manic criteria; the elimination of mixed episodes; the creation of new categories and specifiers (“other specified bipolar and related disorder”, “disruptive mood dysregulation disorder”, “with anxious distress”, “with mixed features”, “with peripartum onset”); the categorization of hypo/manic episodes during antidepressant treatment into bipolar disorder; the elimination of the “bereavement exclusion”; the ambiguous separation between bipolar I and II; the insufficient distinction between “other specified bipolar and related disorders” and major depressive disorder; the differentiation regarding borderline personality disorder; agitation; premenstrual dysphoric disorder; and society and psychiatry. Through this analysis, we point out both the achievements and limitations of DSM-5. In addition, to examine the future direction of psychiatry, we introduce our cohort study regarding maternal depression and an outline of the National Institute of Mental Health’s Research Domain Criteria project in the US. Finally, we advocate the importance of elucidating etiopathogeneses by starting from or going beyond the DSM operational diagnostic system, which has shown great efficacy.

DOI： 10.1007/s00702-017-1828-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Translational Psychiatry  

In schizophrenia (SCZ) and autism spectrum disorder (ASD), the dysregulation of glutamate transmission through N-methyl-d-aspartate receptors (NMDARs) has been implicated as a potential etiological mechanism. Previous studies have accumulated evidence supporting NMDAR-encoding genes' role in etiology of SCZ and ASD. We performed a screening study for exonic regions of GRIN1, GRIN2A, GRIN2C, GRIN2D, GRIN3A, and GRIN3B, which encode NMDAR subunits, in 562 participates (370 SCZ and 192 ASD). Forty rare variants were identified including 38 missense, 1 frameshift mutation in GRIN2C and 1 splice site mutation in GRIN2D. We conducted in silico analysis for all variants and detected seven missense variants with deleterious prediction. De novo analysis was conducted if pedigree samples were available. The splice site mutation in GRIN2D is predicted to result in intron retention by minigene assay. Furthermore, the frameshift mutation in GRIN2C and splice site mutation in GRIN2D were genotyped in an independent sample set comprising 1877 SCZ cases, 382 ASD cases, and 2040 controls. Both of them were revealed to be singleton. Our study gives evidence in support of the view that ultra-rare variants with loss of function (frameshift, nonsense or splice site) in NMDARs genes may contribute to possible risk of SCZ.

DOI： 10.1038/s41398-017-0061-y

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Pediatric Consultation-Liaison Psychiatry: A Global, Healthcare Systems-Focused, and Problem-Based Approach  

DOI： 10.1007/978-3-319-89488-1_14

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>Although the association between maternal depression and bonding failure during pregnancy and after delivery has been investigated, the causal relationships remain unclear.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>A total of 751 women (mean [SD] age, 32.1 [4.4] years) completed the Mother–Infant Bonding Questionnaire and the Edinburgh Postnatal Depression Scale during early pregnancy before week 25 (T1), during late pregnancy around week 36 (T2), and at 5 days after delivery (T3). We created a structural regression model to clarify the relationships between depressive mood and bonding failure during pregnancy and at 5 days after delivery. The model was tested with structural equation modeling.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Our non‐recursive model fit the data well, and we found that: (i) during T2, bonding failure predicted depressive mood (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.23); (ii) at T3, bonding failure predicted depressive mood (<jats:italic>P</jats:italic> < 0.05, <jats:italic>r</jats:italic> = 0.31); (iii) during T1, depressive mood was correlated with bonding failure (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.45); (iv) depressive mood during T1 predicted depressive mood during T2 (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.58); (v) depressive mood during T2 predicted depressive mood at T3 (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.45); (vi) bonding failure during T1 predicted bonding failure during T2 (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.84); and (vii) bonding failure during T2 predicted bonding failure at T3 (<jats:italic>P</jats:italic> < 0.01, <jats:italic>r</jats:italic> = 0.44). The determinant coefficients of depressive mood and bonding failure at T3 were 0.41 and 0.28, respectively.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>Our large‐scale cohort study indicates that bonding failure predicts depressive mood during pregnancy and 5 days after delivery. These findings suggest that protection and support for pregnant women with depressive mood and bonding failure may prevent both issues during pregnancy and the early stage after delivery.</jats:p></jats:sec>

DOI： 10.1111/pcn.12541

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nature Neuroscience  

We systematically analyzed postzygotic mutations (PZMs) in whole-exome sequences from the largest collection of trios (5,947) with autism spectrum disorder (ASD) available, including 282 unpublished trios, and performed resequencing using multiple independent technologies. We identified 7.5% of de novo mutations as PZMs, 83.3% of which were not described in previous studies. Damaging, nonsynonymous PZMs within critical exons of prenatally expressed genes were more common in ASD probands than controls (P < 1 × 10-6), and genes carrying these PZMs were enriched for expression in the amygdala (P = 5.4 × 10-3). Two genes (KLF16 and MSANTD2) were significantly enriched for PZMs genome-wide, and other PZMs involved genes (SCN2A, HNRNPU and SMARCA4) whose mutation is known to cause ASD or other neurodevelopmental disorders. PZMs constitute a significant proportion of de novo mutations and contribute importantly to ASD risk.

DOI： 10.1038/nn.4598

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Causal relationships between perinatal bonding failure, depression, and social support among mothers remain unclear. A total of 494 women (mean age 32.4 ± 4.5 years) completed the Mother-Infant Bonding Questionnaire (MIBQ), the Edinburgh Postnatal Depression Scale (EPDS), and the Japanese version of the Social Support Questionnaire in early pregnancy before week 25 (T1) and 1 month after delivery (T2). Our model of recursive structured equation modeling (SEM) showed acceptable fit (CMIN/df = 2.2, CFI = 0.97, and RMSEA = 0.05). It was revealed that: (1) a lower number of supportive persons at T1 significantly predicted both MIBQ and EPDS scores at T1 and T2; (2) at T1, poorer satisfaction with the social support received significantly predicted EPDS scores; (3) both MIBQ and EPDS scores at T1 significantly predicted their respective scores at T2. Out cohort study indicates that the number of individuals who are available to provide social support and the degree of satisfaction with the level of social support received during pregnancy have a great influence on bonding failure and depression in the postpartum period. These findings suggest that psychosocial interventions that focus on these two aspects of social support during pregnancy are effective in preventing bonding failure and depression in the postpartum period.

DOI： 10.1038/s41598-017-08768-3

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記述言語：英語  

DOI： 10.1038/tp.2017.170

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Drug-induced Extrapyramidal Symptoms Scale (DIEPSS) is developed in the era of second-generation antipsychotics and is suitable for evaluation of the low incidence of extrapyramidal symptoms occurring in the treatment of atypical antipsychotics, as well as the relationship between personal and social functioning. The study was carried out at the Institute of Mental Health in Serbia in 2015 Study used the 127 DIEPSS video clips material, recorded from 1987 till 2015. Four raters performed the assessment simultaneously, individually rating one assigned item immediately after seeing the video clip. For the purpose of evaluating test-retest reliability the second assessment of the same material was performed nine months after the first assessment. Inter-rater reliability was high for each individual item, with ICCs ranging from 0.769 to 0.949. The inter-rater reliability was highest for akathisia item and lowest for dyskinesia. The test-retest reliability was high for each individual item, with ICC ranging from 0.713 to 0.935. The test-retest reliability was highest for bradykinesia item and lowest for dystonia. The Serbian version of DIEPSS has high level of inter-rater and test-retest reliability. High values of concordance rates (ICC > 0.7) for each evaluated individual item suggest that items of DIEPSS are well defined.

DOI： 10.1038/s41598-017-08706-3

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記述言語：英語   出版者・発行元：Translational Psychiatry  

CX3CR1, a G protein-coupled receptor solely expressed by microglia in the brain, has been repeatedly reported to be associated with neurodevelopmental disorders including schizophrenia (SCZ) and autism spectrum disorders (ASD) in transcriptomic and animal studies but not in genetic studies. To address the impacts of variants in CX3CR1 on neurodevelopmental disorders, we conducted coding exon-targeted resequencing of CX3CR1 in 370 Japanese SCZ and 192 ASD patients using next-generation sequencing technology, followed by a genetic association study in a sample comprising 7054 unrelated individuals (2653 SCZ, 574 ASD and 3827 controls). We then performed in silico three-dimensional (3D) structural modeling and in vivo disruption of Akt phosphorylation to determine the impact of the detected variant on CX3CR1-dependent signal transduction. We detected a statistically significant association between the variant Ala55Thr in CX3CR1 with SCZ and ASD phenotypes (odds ratio=8.3, P=0.020). A 3D structural model indicated that Ala55Thr could destabilize the conformation of the CX3CR1 helix 8 and affect its interaction with a heterotrimeric G protein. In vitro functional analysis showed that the CX3CR1-Ala55Thr mutation inhibited cell signaling induced by fractalkine, the ligand for CX3CR1. The combined data suggested that the variant Ala55Thr in CX3CR1 might result in the disruption of CX3CR1 signaling. Our results strengthen the association between microglia-specific genes and neurodevelopmental disorders.

DOI： 10.1038/tp.2017.173

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その他リンク： http://www.nature.com/articles/tp2017173

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Frontiers in Oncology  

Oncolytic viruses (OVs) are opening new possibilities in cancer therapy with their unique mechanism of selective replication within tumor cells and triggering of antitumor immune responses. HF10 is an oncolytic herpes simplex virus-1 with a unique genomic structure that has non-engineered deletions and insertions accompanied by frame-shift mutations, in contrast to the majority of engineered OVs. At the genetic level, HF10 naturally lacks the expression of UL43, UL49.5, UL55, UL56, and latency-associated transcripts, and overexpresses UL53 and UL54. In preclinical studies, HF10 replicated efficiently within tumor cells with extensive cytolytic effects and induced increased numbers of activated CD4+ and CD8+ T cells and natural killer cells within the tumor, leading to a significant reduction in tumor growth and prolonged survival rates. Investigator-initiated clinical studies of HF10 have been completed in recurrent breast carcinoma, head and neck cancer, and unresectable pancreatic cancer in Japan. Phase I trials were subsequently completed in refractory superficial cancers and melanoma in the United States. HF10 has been demonstrated to have a high safety margin with low frequency of adverse effects in all treated patients. Interestingly, HF10 antigens were detected in pancreatic carcinoma over 300 days after treatment with infiltration of CD4+ and CD8+ T cells, which enhanced the immune response. To date, preliminary results from a Phase II trial have indicated that HF10 in combination with ipilimumab (anti-CTLA-4) is safe and well tolerated, with high antitumor efficacy. Improvement of the effect of ipilimumab was observed in patients with stage IIIb, IIIc, or IV unresectable or metastatic melanoma. This review provides a concise description of the genomic functional organization of HF10 compared with talimogene laherparepvec. Furthermore, this review focuses on HF10 in cancer treatment as monotherapy as well as in combination therapy through a concise description of all preclinical and clinical data. In addition, we will address approaches for future directions in HF10 studies as cancer therapy.

DOI： 10.3389/fonc.2017.00149

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Pharmacopsychiatry  

Introduction: Although adjunctive aripiprazole improves hyperprolactinemia, sufficient evidence for its effects on sexual dysfunction has not been obtained. We assessed the usefulness of adjunctive aripiprazole for schizophrenia with sexual dysfunction. Methods: 22 Japanese schizophrenia patients with antipsychotic-induced hyperprolactinemia and sexual dysfunction were enrolled, and 19 of them completed the study. Aripiprazole was administrated in a flexible titration schedule to participants according to the judgment of each doctor, and patients were followed for 24 weeks. Serum prolactin, Clinical Global Impression Scales-Severity (CGI-S), and Nagoya Sexual Function Questionnaire (NSFQ) were measured at baseline and at 4, 8, 12, and 24 weeks. Results: Prolactin at week 4 and later was significantly lower than that at baseline. Compared to baseline, we observed a significant improvement in total sexual dysfunction as measured by NSFQ at week 8 and later. In males, erectile dysfunction was significantly reduced at week 24. In females, menstrual irregularity and galactorrhea were significantly reduced at week 24. CGI-S did not significantly change. Discussion: Although the small sample size is a limitation in this study, adjunctive aripiprazole may be useful treatment for sexual dysfunction including hyperprolactinemia in schizophrenia.

DOI： 10.1055/s-0042-116323

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その他リンク： http://orcid.org/0000-0002-2539-1031

記述言語：英語   出版者・発行元：Molecular Psychiatry  

Recent schizophrenia (SCZ) studies have reported an increased burden of de novo copy number variants (CNVs) and identified specific high-risk CNVs, although with variable phenotype expressivity. However, the pathogenesis of SCZ has not been fully elucidated. Using array comparative genomic hybridization, we performed a high-resolution genome-wide CNV analysis on a mainly (92%) Japanese population (1699 SCZ cases and 824 controls) and identified 7066 rare CNVs, 70.0% of which were small (<100 kb). Clinically significant CNVs were significantly more frequent in cases than in controls (odds ratio=3.04, P=9.3 × 10 -9, 9.0% of cases). We confirmed a significant association of X-chromosome aneuploidies with SCZ and identified 11 de novo CNVs (e.g., MBD5 deletion) in cases. In patients with clinically significant CNVs, 41.7% had a history of congenital/developmental phenotypes, and the rate of treatment resistance was significantly higher (odds ratio=2.79, P=0.0036). We found more severe clinical manifestations in patients with two clinically significant CNVs. Gene set analysis replicated previous findings (e.g., synapse, calcium signaling) and identified novel biological pathways including oxidative stress response, genomic integrity, kinase and small GTPase signaling. Furthermore, involvement of multiple SCZ candidate genes and biological pathways in the pathogenesis of SCZ was suggested in established SCZ-associated CNV loci. Our study shows the high genetic heterogeneity of SCZ and its clinical features and raises the possibility that genomic instability is involved in its pathogenesis, which may be related to the increased burden of de novo CNVs and variable expressivity of CNVs.

DOI： 10.1038/mp.2016.88

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Early detection of Autism Spectrum Disorder (ASD) has proven to be of high significance, however there is a limited availability of ASD screening tools in Serbian language. In this study we aim to translate, assess reliability and, in part, test the applicability of Modified Checklist for Autism in Toddlers, Revised, with Follow-Up (M-CHAT R/F) in Serbian Healthcare environment. We screened 128 children in three primary healthcare centres and 20 children in a tertiary psychiatric center, using M-CHAT R/F translated into Serbian language, between December 2014 and October 2015. At the end of the screening process 80% of participants in the risk group screened positive for ASD, while in the control group 4 (3.1%) participants screened positive, with a mean total scores of 8.25 and 0.66 respectively. The Cronbach's α coefficient was 0.91 and Guttman's λ6 was 0.93. Test-retest reliability was deemed as acceptable, and no significant correlation was found between M-CHAT-R/F scores and Epworth Sleepiness Scale for children scores. The Serbian version of the M-CHAT-R/F has shown satisfactory reliability. We can therefore assert that it is a reliable tool for identifying ASD and it can be used in clinical practice to improve early detection, assessment and treatment.

DOI： 10.1038/srep38222

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：Schizophrenia Research  

DOI： 10.1016/j.schres.2016.08.023

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nagoya Journal of Medical Science  

MBD5 (Methyl-CpG-binding domain 5) is a critical gene for normal development. While deletion or duplication of MBD5 may contribute to a genetic predisposition to autism spectrum disorders (ASD), intellectual disability, or epilepsy, the impact of rare MBD5 single nucleotide variants (SNVs) on neurodevelopmental features, particularly features with late onset, has not been fully explored. In this study, we conducted exon-targeted resequencing of MBD5 with next-generation sequencing technology in 562 Japanese patients (192 with idiopathic ASD and 370 with schizophrenia (SCZ)) and detected 16 MBD5 SNVs with allele frequencies of ≤ 1%. We then performed phenotype analyses with 12 novel variants of these 16 SNVs. SCZ patients with these variants exhibited mainly within normal development ranges until the first psychosis and ASD patients with SNVs did not precisely overlap with the core characteristics described in previous literature as being associated with MBD5 SNVs. Our results suggested that MBD5 variants might contribute to a broad spectrum of neurodevelopmental pathophysiology. Further research and assessment of clinical diagnostic screening are necessary for understanding the burden of rare MBD5 SNVs for these neurodevelopmental disorders.

DOI： 10.18999/nagjms.78.4.465

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

N-methyl-d-aspartate receptors (NMDARs) play a critical role in excitatory synaptic transmission and plasticity in the central nervous systems. Recent genetics studies in schizophrenia (SCZ) show that SCZ is susceptible to NMDARs and the NMDAR signaling complex. In autism spectrum disorder (ASD), several studies report dysregulation of NMDARs as a risk factor for ASD. To further examine the association between NMDARs and SCZ/ASD development, we conducted a mutation screening study of GRIN2B which encodes NR2B subunit of NMDARs, to identify rare mutations that potentially cause diseases, in SCZ and ASD patients (n = 574 and 152, respectively). This was followed by an association study in a large sample set of SCZ, ASD, and normal healthy controls (n = 4145, 381, and 4432, respectively). We identified five rare missense mutations through the mutation screening of GRIN2B. Although no statistically significant association between any single mutation and SCZ or ASD was found, one of its variant, K1292R, is found only in the patient group. To further examine the association between mutations in GRIN2B and SCZ/ASD development, a larger sample size and functional experiments are needed.

DOI： 10.1038/srep33311

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：Wiley  

<jats:p>The fifth edition of the <jats:italic>Diagnostic and Statistical Manual of Mental Disorders</jats:italic> (<jats:styled-content style="fixed-case">DSM</jats:styled-content>‐5) was published in 2013, and its official Japanese version was published in 2014. The Japanese Government uses classifications from the 10th revision of the <jats:styled-content style="fixed-case">
<jats:italic>I</jats:italic>
</jats:styled-content>
<jats:italic>nternational</jats:italic> <jats:styled-content style="fixed-case">
<jats:italic>C</jats:italic>
</jats:styled-content>
<jats:italic>lassification of</jats:italic> <jats:styled-content style="fixed-case">
<jats:italic>D</jats:italic>
</jats:styled-content>
<jats:italic>iseases</jats:italic> (<jats:styled-content style="fixed-case">ICD</jats:styled-content>‐10) to categorize disorders and determine treatment fees. However, since the publication of the <jats:styled-content style="fixed-case">DSM‐III</jats:styled-content>, the use of the <jats:styled-content style="fixed-case">DSM</jats:styled-content> system has become prevalent in research and educational settings in Japan. In addition to traditional psychiatry, both the <jats:styled-content style="fixed-case">ICD</jats:styled-content> and the <jats:styled-content style="fixed-case">DSM</jats:styled-content> are taught by many Japanese medical schools, and virtually all clinical research and trials refer to the <jats:styled-content style="fixed-case">DSM</jats:styled-content> to define targeted disorders. Amid the current backdrop in which the reputation of the <jats:styled-content style="fixed-case">DSM</jats:styled-content>‐5 is being established, the editorial board of <jats:styled-content style="fixed-case">
<jats:italic>P</jats:italic>
</jats:styled-content>
<jats:italic>sychiatry and</jats:italic> <jats:styled-content style="fixed-case">
<jats:italic>C</jats:italic>
</jats:styled-content>
<jats:italic>linical</jats:italic> <jats:styled-content style="fixed-case">
<jats:italic>N</jats:italic>
</jats:styled-content>
<jats:italic>eurosciences</jats:italic> has asked Japanese experts across 12 specialties to examine the structure of the <jats:styled-content style="fixed-case">DSM</jats:styled-content>‐5, including the following categories: Neurodevelopmental Disorders, Schizophrenia Spectrum Disorders, Major Depression, Bipolar Disorders, Obsessive–Compulsive Disorders, Somatic Symptom Disorder, Eating Disorders, Substance‐Related and Addictive Disorders, Gender Dysphoria, and Neurocognitive Disorders. Although opinions were only obtained from these selected experts, we believe that we have succeeded, to a certain extent, in presenting views that are representative of each specialty.</jats:p>

DOI： 10.1111/pcn.12421

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMC Psychiatry  

Background: The Mother-Infant Bonding Questionnaire (MIBQ) has been widely used to assess maternal emotional involvement with infants. Although the reliability and validity of the MIBQ in the postpartum period has been confirmed, it remains unclear whether the MIBQ is appropriate to assess maternal bonding in both pregnancy and the postpartum period over time. Our study were aimed to 1) examine the reliability and validity of the MIBQ for clinical use among pregnant and postpartum women; and 2) examine the factor structure of the items, create subscales, and confirm the stability of the MIBQ in the pregnancy and postpartum periods. Methods: Participants (n = 751, mean age 32.1 ± 4.4 years) completed the MIBQ and the Edinburgh Postnatal Depression Scale (EPDS) in early pregnancy (before week 25), in late pregnancy (around week 36), 5 days after delivery, and 1 month after delivery. We randomly divided participants into two sample sets. We conducted an exploratory factor analysis of the nine MIBQ items using data from one group of mothers (Group 1; n = 376) in all four periods. The factor structure derived from the exploratory factor analysis was confirmed by a confirmatory factor analysis in the second group (Group 2; n = 375) of mothers in all four periods. Results: Exploratory factor analysis yielded two factors: Lack of Affection (LA) and Anger and Rejection (AR). Confirmatory factor analysis demonstrated that LA and AR factors existed for the MIBQ in all periods. Cronbach's alpha coefficients were 0.879 and 0.584, respectively. The scores for LA and AR were significantly correlated over the four time periods. Mothers with higher AR scores on the MIBQ at any of the four periods had higher scores on the EPDS. Conclusions: The MIBQ has two subscales regardless of the timing of the assessment. The MIBQ is appropriate for pregnant as well as postpartum women to assess maternal bonding toward the fetus and infant.

DOI： 10.1186/s12888-016-0933-3

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記述言語：日本語   出版者・発行元：(一社)日本神経精神薬理学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

PSD-95 associated PSD proteins play a critical role in regulating the density and activity of glutamate receptors. Numerous previous studies have shown an association between the genes that encode these proteins and schizophrenia (SZ) and autism spectrum disorders (ASD), which share a substantial portion of genetic risks. We sequenced the protein-encoding regions of DLG1, DLG2, DLG4, DLGAP1, DLGAP2, and SynGAP in 562 cases (370 SZ and 192 ASD patients) on the Ion PGM platform. We detected 26 rare (minor allele frequency <1%), non-synonymous mutations, and conducted silico functional analysis and pedigree analysis when possible. Three variants, G344R in DLG1, G241S in DLG4, and R604C in DLGAP2, were selected for association analysis in an independent sample set of 1315 SZ patients, 382 ASD patients, and 1793 healthy controls. Neither DLG4-G241S nor DLGAP2-R604C was detected in any samples in case or control sets, whereas one additional SZ patient was found that carried DLG1-G344R. Our results suggest that rare missense mutations in the candidate PSD genes may increase susceptibility to SZ and/or ASD. These findings may strengthen the theory that rare, non-synonymous variants confer substantial genetic risks for these disorders.

DOI： 10.1038/srep27491

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS Genetics  

Duplications at 15q11.2-q13.3 overlapping the Prader-Willi/Angelman syndrome (PWS/AS) region have been associated with developmental delay (DD), autism spectrum disorder (ASD) and schizophrenia (SZ). Due to presence of imprinted genes within the region, the parental origin of these duplications may be key to the pathogenicity. Duplications of maternal origin are associated with disease, whereas the pathogenicity of paternal ones is unclear. To clarify the role of maternal and paternal duplications, we conducted the largest and most detailed study to date of parental origin of 15q11.2-q13.3 interstitial duplications in DD, ASD and SZ cohorts. We show, for the first time, that paternal duplications lead to an increased risk of developing DD/ASD/multiple congenital anomalies (MCA), but do not appear to increase risk for SZ. The importance of the epigenetic status of 15q11.2-q13.3 duplications was further underlined by analysis of a number of families, in which the duplication was paternally derived in the mother, who was unaffected, whereas her offspring, who inherited a maternally derived duplication, suffered from psychotic illness. Interestingly, the most consistent clinical characteristics of SZ patients with 15q11.2-q13.3 duplications were learning or developmental problems, found in 76% of carriers. Despite their lower pathogenicity, paternal duplications are less frequent in the general population with a general population prevalence of 0.0033% compared to 0.0069% for maternal duplications. This may be due to lower fecundity of male carriers and differential survival of embryos, something echoed in the findings that both types of duplications are de novo in just over 50% of cases. Isodicentric chromosome 15 (idic15) or interstitial triplications were not observed in SZ patients or in controls. Overall, this study refines the distinct roles of maternal and paternal interstitial duplications at 15q11.2-q13.3, underlining the critical importance of maternally expressed imprinted genes in the contribution of Copy Number Variants (CNVs) at this interval to the incidence of psychotic illness. This work will have tangible benefits for patients with 15q11.2-q13.3 duplications by aiding genetic counseling.

DOI： 10.1371/journal.pgen.1005993

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Oxford University Press (OUP)  

DOI： 10.1093/ijnp/pyw041.338

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Both schizophrenia (SCZ) and autism spectrum disorders (ASD) are neuropsychiatric disorders with overlapping genetic etiology. Protocadherin 15(PCDH15), which encodes a member of the cadherin super family that contributes to neural development and function, has been cited as a risk gene for neuropsychiatric disorders. Recently, rare variants of large effect have been paid attention to understand the etiopathology of these complex disorders. Thus, we evaluated the impacts of rare, single-nucleotide variants (SNVs) in PCDH15 on SCZ or ASD. First, we conducted coding exon-targeted resequencing of PCDH15 with nextgeneration sequencing technology in 562 Japanese patients (370 SCZ and 192 ASD) and detected 16 heterozygous SNVs. We then performed association analyses on 2,096 cases (1,714 SCZ and 382 ASD) and 1,917 controls with six novel variants of these 16 SNVs. Of these six variants, four (p.R219K, p.T281A, p.D642N, c.3010-1G>C) were ultra-rare variants (minor allele frequency < 0.0005) that may increase disease susceptibility. Finally, no statistically significant association between any of these rare, heterozygous PCDH15 point variants and SCZ or ASD was found. Our results suggest that a larger sample size of resequencing subjects is necessary to detect associations between rare PCDH15 variants and neuropsychiatric disorders.

DOI： 10.1371/journal.pone.0153224

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:label /><jats:p>Chromosome 22q11.2 deletion syndrome and genetic variations including single‐nucleotide polymorphism (SNP) and copy number variation (CNV) in catechol‐O‐methyltransferase (<jats:italic>COMT</jats:italic>) situated at 22q11.2 remains controversial. Here, the genetic relationship between <jats:italic>COMT</jats:italic> and Japanese patients with schizophrenia was investigated by examining whether the SNPs correlated with schizophrenia based on a common disease–common variant hypothesis. Additionally, 22q11.2DS were screened based on a common disease–rare variant hypothesis; low‐frequency CNVs situated at two <jats:italic>COMT</jats:italic> promoters and exons were investigated based on the low‐frequency variants with an intermediate effect; and positive findings from the first stage were reconfirmed using a second‐stage replication study including a larger sample size. Eight SNPs and 10 CNVs were investigated using Taqman SNP and CNV quantitative real‐time polymerase chain reaction method. For the first‐stage analysis, 513 unrelated Japanese patients with schizophrenia and 705 healthy controls were examined. For the second‐stage replication study, positive findings from the first stage were further investigated using a larger sample size, namely 1,854 patients with schizophrenia and 2,137 controls. The first‐stage analysis showed significant associations among schizophrenia, intronic SNP rs165774, CNV6 situated at promoter 1, CNV8 at exon 6, and CNV9 at exon 7. The second‐stage study showed that intronic SNP rs165774 (χ<jats:sup>2</jats:sup> = 8.327, <jats:italic>P</jats:italic> = 0.0039), CNV6 (χ<jats:sup>2</jats:sup> = 19.66, <jats:italic>P</jats:italic> = 0.00005), and CNV8 (χ<jats:sup>2</jats:sup> = 16.57, <jats:italic>P</jats:italic> = 0.00025) were significantly associated with schizophrenia. Large and rare CNVs as well as low‐frequency CNVs and relatively small CNVs, namely <30 kb in <jats:italic>COMT</jats:italic>, may be genetic risk factors for schizophrenia. © 2016 Wiley Periodicals, Inc.</jats:p></jats:sec>

DOI： 10.1002/ajmg.b.32426

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：Journal of Eating Disorders  

The authors investigated the association between personality and physical/mental status in malnourished patients with eating disorders. A total of 45 patients with anorexia nervosa, avoidant/restrictive food intake disorder, and other specified feeding or eating disorders were included and compared with 39 healthy controls. Personality characteristics and severity of depression were assessed using the Temperament and Character Inventory-125 and Beck's Depression Inventory. Depression correlated with harm avoidance and self-directedness in both cases and controls. Body mass index did not correlate with personality in either group. These findings should be verified by longitudinal studies with higher weight/weight recovered patients.

DOI： 10.1186/s40337-015-0077-8

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

B-cell CLL/lymphoma 9 (BCL9) is located within the schizophrenia (SCZ) suspected locus chr1q21.1. A recent study reported that a single nucleotide polyphormism (SNP) within BCL9 (rs583583) is associated with negative symptoms of Schizophrenia, as measured by the Positive and Negative Syndrome Scale (PANSS), in the Caucasian population. We therefore investigated genetic association of rs583583, and its effect on negative symptoms in the Japanese patients. For association analysis, we used a Japanese sample set comprising 1089 SCZ and 950 controls (CON). Analysis of the effect of rs586586 on negative symptoms as examined by PANSS was investigated using 280 SCZ. Furthermore, for analysis of cognitive performance, we investigated 90 SCZ and 51 CON using the Continuous Performance Test (CPT-IP) and the Wisconsin Card Sorting Test (WCST) Keio version. We did not detect association between rs583583 and SCZ. Furthermore, rs583583 was not associated with PANSS negative scores or with CPT-IT or WCST cognitive tests. Considering the results of our previous study, combined with the results of the current study of rs583583, we argue that BCL9 most likely does not harbor a common genetic variant that can increase the risk for SCZ in the Japanese population.

DOI： 10.1038/srep15705

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:sec><jats:title>Introduction</jats:title><jats:p>Response conflict involves selectively attending to relevant information and suppressing distracting, irrelevant information. The medial frontal cortex (<jats:styled-content style="fixed-case">MFC</jats:styled-content>) is considered to be involved in response conflict. However, it remains unclear which white matter connectivity is associated with response conflict. This study aimed to delineate the neural connectivity of response conflict in healthy subjects and investigate the association between white matter microstructure and performance of a response conflict task.</jats:p></jats:sec><jats:sec><jats:title>Method</jats:title><jats:p>Twenty‐eight healthy subjects underwent functional magnetic resonance imaging (<jats:styled-content style="fixed-case">fMRI</jats:styled-content>) during the Flanker task and diffusion <jats:styled-content style="fixed-case">MRI</jats:styled-content>. We identified the presupplementary motor area (pre‐<jats:styled-content style="fixed-case">SMA</jats:styled-content>) using <jats:styled-content style="fixed-case">fMRI</jats:styled-content>. Furthermore, we delineated the white matter connectivity between the pre‐<jats:styled-content style="fixed-case">SMA</jats:styled-content> and the cingulum bundle (<jats:styled-content style="fixed-case">CB</jats:styled-content>), which is located in the <jats:styled-content style="fixed-case">MFC</jats:styled-content>, using probabilistic tractography. We calculated the mean diffusivity (<jats:styled-content style="fixed-case">MD</jats:styled-content>), index of white matter microstructure, of this tract and evaluate the association between <jats:styled-content style="fixed-case">MD</jats:styled-content> and performance of the Flanker task.</jats:p></jats:sec><jats:sec><jats:title>Result</jats:title><jats:p>The mean <jats:styled-content style="fixed-case">MD</jats:styled-content> of this tract was significantly and positively associated with performance of the Flanker task.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>The present study suggests the white matter connectivity between the pre‐<jats:styled-content style="fixed-case">SMA</jats:styled-content> and the <jats:styled-content style="fixed-case">CB</jats:styled-content> is related to the response conflict in healthy subjects and finer white matter microstructure is associated with smaller response conflict.</jats:p></jats:sec>

DOI： 10.1002/brb3.375

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:p>Schizophrenia, a debilitating disease with 1% prevalence in the general population, is characterized by major neuropsychiatric symptoms, including delusions, hallucinations, and deficits in emotional and social behavior. Previous studies have directed their investigations on the mechanism of schizophrenia towards neuronal dysfunction and have defined schizophrenia as a ‘neuron‐centric’ disorder. However, along with the development of genetics and systematic biology approaches in recent years, the crucial role of glial cells in the brain has also been shown to contribute to the etiopathology of schizophrenia. Here, we summarize comprehensive data that support the involvement of glial cells (including oligodendrocytes, astrocytes, and microglial cells) in schizophrenia and list several acknowledged glia‐related genes or molecules associated with schizophrenia. Instead of purely an abnormality of neurons in schizophrenia, an additional ‘glial perspective’ provides us a novel and promising insight into the causal mechanisms and treatment for this disease.</jats:p>

DOI： 10.1111/pcn.12290

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Psychopharmacology  

Abstract Rationale: Hypnotics are widely used to treat insomnia but adverse effects of different hypnotics, especially benzodiazepine receptor agonists, are getting more attention lately. The effects of novel hypnotics have not been fully examined. Objective: This study aims to assess the effects of two hypnotics, ramelteon and triazolam, on driving performance, cognitive function, and equilibrium function. Methods: In this double-blinded, three-way crossover trial, 17 healthy males received acute doses of 8 mg ramelteon, 0.125 mg triazolam, and placebo. The subjects were administered three driving tasks - road-tracking, car-following, and harsh-braking - using a driving simulator and three cognitive tasks - Continuous Performance Test, N-back Test, and Trail-Making Test - at baseline and at 1 and 4 h post-dosing. The Stanford Sleepiness Scale scores and computerized posturography were also assessed. Results: In the driving simulations, ramelteon and triazolam increased the number of subjects who slid off the road. Triazolam increased the standard deviation of lateral position compared to ramelteon and placebo at 1 h post-dosing. Ramelteon and triazolam significantly increased the time to complete of Trail-Making Test part A and the environmental area in posturography compared to placebo at 1 and 4 h post-dosing. Ramelteon and triazolam significantly increased subjective sleepiness compared to placebo at 1 h post-dosing. Conclusions: Ramelteon may affect road-tracking performance, visual attention and/or psychomotor speed measured by Trail-Making Test part A, and body balance in acute dosing. Lower dose of triazolam also impaired performance worse than ramelteon. Physicians should consider risks and benefits when prescribing both drugs, especially in the initial period of administration.

DOI： 10.1007/s00213-014-3843-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Although the association between social support and postpartum depression has been previously investigated, its causal relationship remains unclear. Therefore, we examined prospectively whether social support during pregnancy affected postpartum depression. Social support and depressive symptoms were assessed by Japanese version of Social Support Questionnaire (J-SSQ) and Edinburgh Postnatal Depression Scale (EPDS), among 877 pregnant women in early pregnancy and at one month postpartum. First, J-SSQ was standardized among peripartum women. The J-SSQ was found to have a two-factor structure, with Number and Satisfaction subscales, by exploratory and confirmatory factor analyses. Analysis of covariance was performed to examine how EPDS and J-SSQ scores during pregnancy affected the EPDS score at postpartum. Significant associations were found between postpartum EPDS score and both EPDS and total scores on the Number subscales during pregnancy (β= 0.488 and-0.054, ps < 0.001). Specifically, this negative correlation was stronger in depressive than non-depressive groups. Meanwhile, total score on Satisfaction subscales was not significantly associated with postpartum EPDS score. These results suggest that having a larger number of supportive persons during pregnancy helps protect against postpartum depression, and that this effect is greater in depressive than non-depressive pregnant women. This finding is expected to be vitally important in preventive interventions.

DOI： 10.1038/srep10520

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Vaccine  

Objective: This case-control study investigated the relationship between the risk of Autism Spectrum Disorder (ASD) onset, and early exposure to the combined Measles-Mumps-Rubella (MMR) vaccine and thimerosal consumption measured from vaccinations in the highly genetically homogenous Japanese population. Methods: Vaccination histories at 1, 3, 6, 12, 18, 24, and 36 months from birth were investigated in ASD cases (189 samples), and controls (224 samples) matching age and sex in each case. Crude odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated to determine relationship between MMR vaccination and ASD. The differences in mean values of the thimerosal dosage between cases and controls were analyzed using an unpaired t-test. MMR vaccination and thimerosal dosage were also investigated using a conditional multiple-regression model. Results: There were no significant differences in MMR vaccination and thimerosal dosage between cases and controls at any age. Furthermore, the ORs (95% CIs) of MMR vaccination and thimerosal dosage associated with ASD in the conditional multiple regression model were, respectively, 0.875 (0.345-2.222) and 1.205 (0.862-1.683) at age 18 months, 0.724 (0.421-1.243) and 1.343 (0.997-1.808) at 24 months, and 1.040 (0.648-1.668) and 0.844 (0.632-1.128) at 36 months. Thus, there were no significant differences. Conclusions: No convincing evidence was found in this study that MMR vaccination and increasing thimerosal dose were associated with an increased risk of ASD onset.

DOI： 10.1016/j.vaccine.2014.12.036

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Psychosomatic Research  

Objective: Burning mouth syndrome (BMS) is a chronic disease in which patients feel a burning sensation and pain in the oral cavity. Although personality traits have been suggested to influence the development and course of BMS, they have not yet been examined in detail. We therefore investigated the personality traits of BMS patients. Methods: Sample consisted of 65 BMS patients presenting to the Aichi-Gakuin Dental School Hospital between May 2005 and April 2009. They were also diagnosed as having pain disorder by a psychiatrist. The control group consisted of 116 healthy subjects. The Temperament and Character Inventory (TCI) was used to evaluate personality traits, while the Beck Depression Inventory (BDI) was used to evaluate the depression rate in both groups. Results: In TCI, we found that, in comparison to the control group, the novelty seeking score was significantly lower (p. =. 0.009), the harm avoidance score was significantly higher (p. <. 0.001), and the self-directedness score was significantly lower (p. =. 0.039) in the BMS group. To remove the influence of depression, we performed an analysis of covariance of each TCI item using the BDI score as a covariate. No significant differences were observed in harm avoidance or self-directedness, whereas the differences noted in novelty seeking were significant (p. =. 0.008). Conclusion: The novelty seeking score was low in BMS patients in comparison to the control group. They also had high harm avoidance and low self-directedness tendencies, but these were attributed to the influence of depression.

DOI： 10.1016/j.jpsychores.2015.02.006

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Bulletin  

Background: Nuclear distribution E homolog 1 (NDE1), located within chromosome 16p13.11, plays an essential role in microtubule organization, mitosis, and neuronal migration and has been suggested by several studies of rare copy number variants to be a promising schizophrenia (SCZ) candidate gene. Recently, increasing attention has been paid to rare single-nucleotide variants (SNVs) discovered by deep sequencing of candidate genes, because such SNVs may have large effect sizes and their functional analysis may clarify etiopathology. Methods and Results: We conducted mutation screening of NDE1 coding exons using 433 SCZ and 145 pervasive developmental disorders samples in order to identify rare single nucleotide variants with a minor allele frequency =5%. We then performed genetic association analysis using a large number of unrelated individuals (3554 SCZ, 1041 bipolar disorder [BD], and 4746 controls). Among the discovered novel rare variants, we detected significant associations between SCZ and S214F (P = .039), and between BD and R234C (P = .032). Furthermore, functional assays showed that S214F affected axonal outgrowth and the interaction between NDE1 and YWHAE (14-3-3 epsilon; a neurodevelopmental regulator). Conclusions: This study strengthens the evidence for association between rare variants within NDE1 and SCZ, and may shed light into the molecular mechanisms underlying this severe psychiatric disorder.

DOI： 10.1093/schbul/sbu147

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：(株)学研メディカル秀潤社  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Progress in Neuro-Psychopharmacology and Biological Psychiatry  

Increasing evidence has implicated the role of Disrupted-in-Schizophrenia-1 (DISC1), a potential susceptibility gene for schizophrenia, in early neurodevelopmental processes. However, the effect of its genotype variation on brain morphologic changes related to neurodevelopmental abnormalities in schizophrenia remains largely unknown. This magnetic resonance imaging study examined the association between DISC1 Ser704Cys polymorphism and a range of brain neurodevelopmental markers [cavum septi pellucidi (CSP), adhesio interthalamica (AI), olfactory sulcus depth, and sulcogyral pattern (Types I, II, III, and IV) in the orbitofrontal cortex (OFC)] in an all Japanese sample of 75 schizophrenia patients and 87 healthy controls. The Cys carriers had significantly larger CSP than the Ser homozygotes for both schizophrenia patients and healthy controls. The Cys carriers also exhibited a reduction in the Type I pattern of the right OFC in the healthy controls, but not in the schizophrenia patients. The DISC1 Ser704Cys polymorphism did not affect the AI and olfactory sulcus depth in either group. These results suggested a possible role of the DISC1 genotype in the early neurodevelopment of human brains, but failed to show its specific role in the neurodevelopmental pathology of schizophrenia. © 2014 Elsevier Inc.

DOI： 10.1016/j.pnpbp.2014.07.005

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: The PTPRA gene, which encodes the protein RPTP-α, is critical to neurodevelopment. Previous linkage studies, genome-wide association studies, controlled expression analyses and animal models support an association with both schizophrenia and autism spectrum disorders, both of which share a substantial portion of genetic risks. Copyright:

DOI： 10.1371/journal.pone.0112531

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Nature  

The genetic architecture of autism spectrum disorder involves the interplay of common and rare variants and their impact on hundreds of genes. Using exome sequencing, here we show that analysis of rare coding variation in 3,871 autism cases and 9,937 ancestry-matched or parental controls implicates 22 autosomal genes at a false discovery rate (FDR) < 0.05, plus a set of 107 autosomal genes strongly enriched for those likely to affect risk (FDR < 0.30). These 107 genes, which show unusual evolutionary constraint against mutations, incur de novo loss-of-function mutations in over 5% of autistic subjects. Many of the genes implicated encode proteins for synaptic formation, transcriptional regulation and chromatin-remodelling pathways. These include voltage-gated ion channels regulating the propagation of action potentials, pacemaking and excitability-transcription coupling, as well as histone-modifying enzymes and chromatin remodellers - most prominently those that mediate post-translational lysine methylation/demethylation modifications of histones.

DOI： 10.1038/nature13772

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：(株)世論時報社  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: YWHAE is a possible susceptibility gene for schizophrenia that encodes 14-3-3epsilon, a Disrupted-in-Schizophrenia 1 (DISC1)-interacting molecule, but the effect of variation in its genotype on brain morphology remains largely unknown. Methods: In this voxel-based morphometric magnetic resonance imaging study, we conducted whole-brain analyses regarding the effects of YWHAE single-nucleotide polymorphisms (SNPs) (rs28365859, rs11655548, and rs9393) and DISC1 SNP (rs821616) on gray matter volume in a Japanese sample of 72 schizophrenia patients and 86 healthy controls. On the basis of a previous animal study, we also examined the effect of rs28365859 genotype specifically on hippocampal volume. Results: Whole-brain analyses showed no significant genotype effect of these SNPs on gray matter volume in all subjects, but we found significant genotype-by-diagnosis interaction for rs28365859 in the left insula and right putamen. The protective C allele carriers of rs28365859 had a significantly larger left insula than the G homozygotes only for schizophrenia patients, while the controls with G allele homozygosity had a significantly larger right putamen than the C allele carriers. The C allele carriers had a larger right hippocampus than the G allele homozygotes in schizophrenia patients, but not in healthy controls. No significant interaction was found between rs28365859 and DISC1 SNP on gray matter volume. Conclusions: These different effects of the YWHAE (rs28365859) genotype on brain morphology in schizophrenia and healthy controls suggest that variation in its genotype might be, at least partly, related to the abnormal neurodevelopment, including in the limbic regions, reported in schizophrenia. Our results also suggest its specific role among YWHAE SNPs in the pathophysiology of schizophrenia. © 2014 Kido et al.

DOI： 10.1371/journal.pone.0103571

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: The Edinburgh Postnatal Depression Scale (EPDS) is a widely used screening tool for postpartum depression (PPD). Although the reliability and validity of EPDS in Japanese has been confirmed and the prevalence of PPD is found to be about the same as Western countries, the factor structure of the Japanese version of EPDS has not been elucidated yet. Methods: 690 Japanese mothers completed all items of the EPDS at 1 month postpartum. We divided them randomly into two sample sets. The first sample set (n = 345) was used for exploratory factor analysis, and the second sample set was used (n = 345) for confirmatory factor analysis. Results: The result of exploratory factor analysis indicated a three-factor model consisting of anxiety, depression and anhedonia. The results of confirmatory factor analysis suggested that the anxiety and anhedonia factors existed for EPDS in a sample of Japanese women at 1 month postpartum. The depression factor varies by the models of acceptable fit. Conclusions: We examined EPDS scores. As a result, "anxiety" and "anhedonia" exist for EPDS among postpartum women in Japan as already reported in Western countries. Cross-cultural research is needed for future research. © 2014 Kubota et al.

DOI： 10.1371/journal.pone.0103941

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Psychiatric Genetics  

The XXI World Congress of Psychiatric Genetics (WCPG), sponsored by the International Society of Psychiatric Genetics (ISPG), took place in Boston, Massachusetts, on 17-21 October 2013. Approximately 900 participants gathered to discuss the latest findings in this rapidly advancing field. The following report was written by student travel awardees. Each was assigned one or more sessions as a rapporteur. This manuscript represents topics covered in most, but not all of the oral presentations during the conference, and contains some of the major notable new findings reported. © 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins.

DOI： 10.1097/YPG.0000000000000043

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Aim</jats:title><jats:p>Postnatal depression has demonstrated long‐term consequences on child cognitive and emotional development; however, the link between maternal and child pathology has not been clearly identified. We conducted a prospective study using self‐rating questionnaires to clarify the association between bonding disorder and maternal mood during pregnancy and after childbirth.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>A total of 389 women participated in this study and completed questionnaires. Participants were asked to complete the <jats:styled-content style="fixed-case">E</jats:styled-content>dinburgh Postnatal Depression Scale (<jats:styled-content style="fixed-case">EPDS</jats:styled-content>) and the Mother‐to‐Infant Bonding Scale four times during pregnancy and the postpartum period.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>We found statistically significant weak to moderate correlations (r = 0.14–0.39) between the <jats:styled-content style="fixed-case">EPDS</jats:styled-content> and Mother‐to‐Infant Bonding Scale scores at each testing period. Women who experienced low mood tended to have stronger bonding disorder. Furthermore, the effectiveness of attachment between the mother and child was closely related to the mood of the mother as measured by the <jats:styled-content style="fixed-case">EPDS</jats:styled-content>.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>We observed different patterns of bonding and maternal mood. Distinct subtypes regarding maternal mood and formation of mother‐to‐infant attachment suggests that analysis of bonding disorder should be performed considering the course of maternal depressive symptoms.</jats:p></jats:sec>

DOI： 10.1111/pcn.12171

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

The ubiquitin ligase F-box protein 45 (FBXO45) is critical for synaptogenesis, neuronal migration, and synaptic transmission. FBXO45 is included in the 3q29 microdeletion region that confers a significant risk for schizophrenia, as shown by rare structural variant studies. Thus, FBXO45 is considered a prominent candidate for mediating schizophrenia pathogenesis. Here, we investigated rare, deleterious single nucleotide variants (SNVs) as well as small insertions and deletions (INDELs) in FBXO45 that may contribute to schizophrenia susceptibility.Using Sanger sequencing, we performed mutation screening in FBXO45 exon regions in 337 schizophrenia patients. Novel missense or nonsense variants were followed up with a genetic association study in an independent sample set of 601 schizophrenia patients and 916 controls, a case report for assessing the clinical consequence of the mutations, a pedigree study for measuring mutation inheritance in the proband's family, bioinformatics analyses for evaluating mutation effect on protein structure and function, and mRNA expression analysis for examining mutation transcriptional influence on FBXO45 expression.One heterozygous, novel, and rare missense mutation (R108C) was identified in a single schizophrenia patient and in his healthy mother. At age 20, this patient was diagnosed with paranoid schizophrenia and carried some clinical features of 3q29 deletion phenotypes, including premorbid IQ decline. With follow-up genotyping, this mutation was not found in either the schizophrenia group (0/601) or the healthy control group (0/916). Bioinformatics analyses predicted that R108C probably pathologically impacted the structure and function of the FBXO45 protein. The relative expression of FBXO45 in SCZ case with R108C mutation was relatively low when compared to 50 schizophrenia patients and 52 healthy controls.The R108C mutation in FBXO45 is a rare variant with a modest effect on schizophrenia risk that may disrupt the structure and function of the FBXO45 protein. Our findings also suggest that FBXO45 may be a new attractive candidate gene for schizophrenia. © 2014 Elsevier B.V.

DOI： 10.1016/j.schres.2014.04.032

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:label /><jats:p>Recent genome‐wide association studies (GWASs) of schizophrenia (SCZ) identified several susceptibility genes and suggested shared genetic components between SCZ and bipolar disorder (BD). We conducted a genetic association study of single nucleotide polymorphisms (SNPs) selected according to previous SCZ GWAS targeting psychotic disorders (SCZ and BD) in the Japanese population. Fifty‐one SNPs were analyzed in a two‐stage design using first‐set screening samples (all SNPs: 1,032 SCZ, 1,012 BD, and 993 controls) and second‐set replication samples (“significant” SNPs in the first‐set screening analysis: 1,808 SCZ, 821 BD, and 2,321 controls). We assessed allelic associations between the selected SNPs and the three phenotypes (SCZ, BD, and “psychosis” [SCZ + BD]). Nine SNPs revealed nominal association signals for all comparisons (P<jats:sub>uncorrected</jats:sub> < 0.05), of which two SNPs located in the major histocompatibility complex region (rs7759855 in <jats:italic>zinc finger and SCAN domain containing 31</jats:italic> [<jats:italic>ZSCAN31</jats:italic>] and rs1736913 in <jats:italic>HLA‐F antisense RNA1</jats:italic> [<jats:italic>HLA‐F‐AS1</jats:italic>]) were further assessed in the second‐set replication samples. The associations were confirmed for rs7759855 (P<jats:sub>corrected</jats:sub> = 0.026 for psychosis; P<jats:sub>corrected</jats:sub> = 0.032 for SCZ), although the direction of effect was opposite to that in the original GWAS of the Chinese population. Finally, a meta‐analysis was conducted using our two samples and using our data and data from Psychiatric GWAS Consortium (PGC), which have shown the same direction of effect. SNP in <jats:italic>ZSCAN31</jats:italic> (rs7759855) had the strongest association with the phenotypes (best <jats:italic>P</jats:italic> = 6.8 × 10<jats:sup>−5</jats:sup> for psychosis: present plus PGC results). These data support shared risk SNPs between SCZ and BD in the Japanese population and association between MHC and psychosis. © 2014 Wiley Periodicals, Inc.</jats:p></jats:sec>

DOI： 10.1002/ajmg.b.32246

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMC Psychiatry  

Background: Functional neuroimaging techniques are widely used to elucidate changes in brain activity, and various questionnaires are used to investigate psychopathological features in patients with eating disorders (ED). It is well known that social skills and interpersonal difficulties are strongly associated with the psychopathology of patients with ED. However, few studies have examined the association between brain activity and social relationships in patients with ED, particularly in patients with extremely low body weight.Methods: In this study, 22-channel near-infrared spectroscopy was used to quantify regional hemodynamic changes during a letter fluency task (LFT) in 20 female patients with ED with a mean body mass index of 14.0 kg/m2and 31 female controls (CTLs). Symptoms were assessed using the Eating Disorder Inventory-2 and Beck Depression Inventory. We hypothesized that frontal activity in patients with ED would be lower than in CTLs and would show different correlations with psychopathological features compared with CTLs.Results: The LFT performance and score on the social insecurity subscale of the Eating Disorder Inventory-2 were significantly higher in the ED group than in the CTL group. The mean change in oxygenated hemoglobin (oxy-Hb) in bilateral frontal regions during the LFT was significantly smaller in the ED group than in the CTL group. Social insecurity score was positively correlated with the concentration of oxy-Hb in the bilateral orbitofrontal cortex in the ED group but not in the CTL group.Conclusions: These results suggest that activity of the orbitofrontal cortex is associated with social insecurity and disturbed in patients with ED. Therefore, disturbed orbitofrontal cortex activity may underlie the lack of insight and social isolation that is characteristic of patients with ED. © 2014 Katayama et al.; licensee BioMed Central Ltd.

DOI： 10.1186/1471-244X-14-173

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Progress in Neuro-Psychopharmacology and Biological Psychiatry  

An altered sulcogyral pattern in the orbitofrontal cortex (OFC) has been implicated in schizophrenia as a possible marker of abnormal neurodevelopment, while its genetic mechanism remains unknown. This magnetic resonance imaging study investigated the relationship between the polymorphism of YWHAE (rs28365859), a gene encoding 14-3-3epsilon that is a Disrupted-in-Schizophrenia 1 (DISC1)-interacting molecule associated with neuronal development, and the OFC subtypes of the 'H-shaped' sulcus (Types I, II, and III) in a Japanese sample of 72 schizophrenia patients and 86 healthy controls. The schizophrenia patients had significantly increased Type III (p=0.004) and decreased Type I (p=0.013) expression on the right hemisphere compared to the controls. The subjects carrying the protective C allele showed a decrease in Type III (p=0.005) and an increase in Type I (p=0.017) compared to the G allele homozygotes, especially for the healthy subjects in the left hemisphere. These results suggest a possible role for the YWHAE genotype in the early development of the OFC sulcogyral pattern, but its effect alone is not likely to explain the altered sulcogyral pattern in schizophrenia. © 2014 Elsevier Inc.

DOI： 10.1016/j.pnpbp.2014.02.005

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5754/hge14104

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Japanese Journal of Clinical Oncology  

Objective: Emotional distress is considered to be higher in patients with head and neck cancer than other types of cancer. The present study aimed to identify predictors of the postoperative levels of depression in patients with head and neck cancer who have undergone surgery. Methods: Postoperative levels of depression were assessed at 3, 6 and 12 months after surgery. The preoperative factors that were significant predictors of the postoperative level of depression at each time point were extracted using multiple regression analyses. Results: The preoperative level of depression was a significant predictor of the postoperative level of depression at the 3rd, 6th and 12th postoperative months. At the sixth postoperative month, negative adjustment to cancer at baseline was also a significant predictor of the postoperative level of depression. Conclusion: Evaluating the level of depression and negative adjustment before surgery is considered to be effective for identifying patients who will develop depression after surgery. © The Author 2014. Published by Oxford University Press. All rights reserved.

DOI： 10.1093/jjco/hyu002

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:p>Autism spectrum disorder is a neurodevelopmental disorder present in 1% of the population, characterized by impairments in reciprocal social interaction, communication deficits and restricted patterns of behavior. Approximately 10% of the autism spectrum disorder population is thought to have large chromosomal rearrangements. Copy‐number variations (CNV) alter the genome structure either by duplication or deletion of a chromosomal region. The association between CNV and autism susceptibility has become more apparent through the use of methods based on comparative genomic hybridization in screening CNV. The nature of the high CNV rate in the human genome is partly explained by non‐allelic homologous recombination between flanking repeated sequences derived from multiple copies of transposons or mobile genetic elements. There are hotspots for CNV in the human genome, such as 16p11.2 and 22q11.2. Genes involved in CNV are supposed to have copy‐number dose‐dependent effects on the behavior of affected individuals. Animal models give insight into the possible interactions between core genetic loci and additional factors contributing to the phenotypes of each individual. If affected genes code for cellular signaling molecules, reducing the dosage in the intracellular signaling pathway may result in the malfunction of the nervous system. The genetic background of autism spectrum disorder is highly heterogenic and most common or rare CNV do not lead to autism spectrum disorders in the majority of cases, but may occasionally increase the risk of developing an autism spectrum disorder.</jats:p>

DOI： 10.1111/pcn.12128

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

Several epidemiological and genetic studies have suggested that the risk of type II diabetes (T2D) is likely to overlap with the susceptibility to psychotic disorders such as schizophrenia (SCZ) and bipolar disorder (BD). In this study, we aimed to examine the association of single-nucleotide polymorphisms (SNPs) detected in previous T2D genome-wide association studies (GWAS) with SCZ, BD and psychosis (SCZ plus BD). A total of 37 SNPs were selected from the literature. A two-stage analysis was conducted using a first set of screening samples (total N=3037) and a second set of replication samples (N=4950). None of the SNPs showed a significant association to the screening samples after correction for multiple testing. To avoid type II error, we genotyped the top three SNPs in BCL11A, HMG20A and HNF4A showing associations with any of the phenotypes (P uncorrected <0.01) using independent samples to replicate the nominal associations. However, we were unable to find any significant associations based on the screening results (P uncorrected >0.05). Our findings did not support the shared genetic risk between T2D and psychotic disorders in the Japanese population. However, further replication using a larger sample size is required.

DOI： 10.1038/jhg.2013.116

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記述言語：英語   出版者・発行元：Journal of Medical Biochemistry  

Background:Schizophrenia is a relatively common disorder, with a lifetime prevalence of about 1%. Family history is the most important risk factor for schizophrenia, consistent with a genetic contribution to its etiology. Recent human genetic studies reported that some common variants located within BCL9 are associated with schizophrenia in the Chinese population, but not associated with bipolar disorder in the Caucasian population. Methods: Single nucleotide variant (SNP) prioritization sample was comprised of 575 patients with schizophrenia and 564 healthy controls with no personal or family history of psychiatric illness. For SNP association analysis, we used an independent Japanese sample set (replication sample) comprising 1464 cases and 1171 controls. For the analysis of cognitive performance, we investigated 115 cases and 87 controls using Continuous Performance Test (CPT-IP) and the Wisconsin Card Sorting Test Keio version (WCST). Meta-selectanalysis was performed using a combined Japanese total sample (N=3735) and a Chinese sample from a previous study. Results: In the replication sample set, we did not detect any association in 2 SNPs (rs672607 and rs10494252) and schizophrenia. Meta-analysis of rs672607 showed significant association (p-value 0.012, odds ratio 0.855). There was a significant (p<0.01) difference between the A/A and G carrier group of rs672607 in CPT mean d' (p=0.0092). Conclusions: We were able to detect evidence for an association between rs672607 in BCL9 and schizophrenia in the meta-analysis of Japanese and Chinese populations. Additionally, this common variant may affect cognitive performance, as measured by the CPT-IP in schizophrenia patients.

DOI： 10.2478/jomb-2013-0049

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Scientific Reports  

Using a very high-resolution oligonucleotide array for copy number variant (CNV) screening of samples comprising schizophrenic patients, we detected a novel CNV within the critical region (NCBI36/hg18, Chr7: 158,630,410-158,719, 410) previously shown to be associated with schizophrenia. We investigated the association between the novel CNV identified in the current study and schizophrenia. Three independent samples were used: (1) Screening set, 300 Japanese schizophrenic patients (53.28 ± 14.66 years); (2) Confirmation set, 531 schizophrenic patients (46.03 ± 12.15 years); and (3) 711 healthy controls (47.12 ± 11.03 years). All subjects enrolled in the study were Japanese. Chromosomal position was determined using fluorescence in situ hybridization. We identified a novel duplication within the region associated with schizophrenia identified on 7q36.3 that is adjacent to VIPR2 and is not associated with schizophrenia. In the Japanese population, the 35-kb region that harbors the common, novel CNV should be excluded from the region associated with schizophrenia on 7q36.3.

DOI： 10.1038/srep02587

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Neuropsychopharmacology  

Methamphetamine (METH) use can provoke psychotic reactions requiring immediate treatment, namely METH-induced psychosis. Although the distinction between METH-induced and primary psychosis is important for understanding their clinical courses, we do not have clear diagnostic procedure by their symptoms. Not only are there similarities between the clinical features of METH-induced psychosis and schizophrenia (SCZ), but there is also epidemiological evidence of a shared genetic risk between 'METH-related' disorders and SCZ, which makes the differentiation of these two conditions difficult. In this study, we conducted a genome-wide association study (GWAS) targeting METH-dependent patients. The METH sample group, used in the METH-dependence GWAS, included 236 METH-dependent patients and 864 healthy controls. We also included a 'within-case' comparison between 194 METH-induced psychosis patients and 42 METH-dependent patients without psychosis in a METH-induced psychosis GWAS. To investigate the shared genetic components between METH dependence, METH-induced psychosis, and SCZ, data from our previous SCZ GWAS (total N=1108) were re-analyzed. In the SNP-based analysis, none of the SNPs showed genome-wide significance in either data set. By performing a polygenic component analysis, however, we found that a large number of 'risk' alleles for METH-induced psychosis are over-represented in individuals with SCZ (P best =0.0090). Conversely, we did not detect enrichment either between METH dependence and METH-induced psychosis or between METH dependence and SCZ. The results support previous epidemiological and neurobiological evidence for a relationship between METH-induced psychosis and SCZ. These also suggest that the overlap between genes scored as positive in these data sets can have higher probability as susceptibility genes for psychosis.

DOI： 10.1038/npp.2013.94

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background:Recent genome-wide association studies (GWASs) investigating bipolar disorder (BD) have detected a number of susceptibility genes. These studies have also provided novel insight into shared genetic components between BD and schizophrenia (SCZ), two major psychotic disorders. To examine the replication of the risk variants for BD and the pleiotropic effect of the variants associated with BD, we conducted a genetic association study of single nucleotide polymorphisms (SNPs) that were selected based upon previous BD GWASs, which targeted psychotic disorders (BD and SCZ) in the Japanese population.Methods:Forty-eight SNPs were selected based upon previous GWASs. A two-stage analysis was conducted using first-set screening (for all SNPs: BD = 1,012, SCZ = 1,032 and control = 993) and second-set replication samples (for significant SNPs in the screening analysis: BD = 821, SCZ = 1,808 and control = 2,149). We assessed allelic association between BD, SCZ, psychosis (BD+SCZ) and the SNPs selected for the analysis.Results:Eight SNPs revealed nominal association signals for all comparisons (Puncorrected<0.05). Among these SNPs, the top two SNPs (associated with psychosis: Pcorrected = 0.048 and 0.037 for rs2251219 and rs2709722, respectively) were further assessed in the second-set samples, and we replicated the signals from the initial screening analysis (associated with psychosis: Pcorrected = 0.0070 and 0.033 for rs2251219 and rs2709722, respectively). The meta-analysis between the current and previous GWAS results showed that rs2251219 in Polybromo1 (PBRM1) was significant on genome-wide association level (P = 5×10-8) only for BD (P = 9.4×10-9) and psychosis (P = 2.0×10-10). Although the association of rs2709722 in Sp8 transcription factor (SP8) was suggestive in the Asian population (P = 2.1×10-7 for psychosis), this signal weakened when the samples size was increased by including data from a Caucasian population (P = 4.3×10-3).Conclusions:We found 3p21.1 (including PBRM1, strong linkage disequilibrium made it difficult to pinpoint the risk genes) and SP8 as risk loci for BD, SCZ and psychosis. Further replication studies will be required for conclusive results. © 2013 Kondo et al.

DOI： 10.1371/journal.pone.0070964

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記述言語：英語   出版者・発行元：Wiley  

<jats:title>Abstract</jats:title><jats:p>Glossodynia is chronic pain localized around the tongue, with no perceivable organic abnormalities. In the fields of oral and maxillofacial surgery, it is categorized as an oral psychosomatic disease. In contrast, psychiatric nosology classifies glossodynia as a pain disorder among somatoform disorders, per the <jats:styled-content style="fixed-case">DSM‐IV</jats:styled-content>. The patient was a 71‐year‐old woman who developed symptoms of glossodynia, specifically a sore tongue. In the decade before she presented to us, she had had bizarre symptoms of oral cenesthopathy such as the sensation that her teeth had become ‘limp and floppy’ and that she needles in her mouth. Treatment was attempted using several psychotropic drugs, but no satisfactory response was noted. Because the patient was referred to our outpatient clinic, we tried psychotropic therapy again. Additionally, valproic acid, tandospirone and sertraline were administered (in this order), but the patient still showed no response. However, when sertraline was changed to milnacipran, all symptoms disappeared in a short period. We suggest that a small dose of milnacipran can be effective for controlling oral cenesthopathy as well as glossodynia.</jats:p>

DOI： 10.1111/j.1479-8301.2012.00430.x

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記述言語：英語  

DOI： 10.1176/appi.ajp.2013.12091228

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記述言語：英語   出版者・発行元：Molecular Psychiatry  

DOI： 10.1038/mp.2012.74

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その他リンク： http://orcid.org/0000-0003-1761-6314

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Bulletin  

In recently completed Japanese genome-wide association studies (GWAS) of schizophrenia (JPN-GWAS) one of the top association signals was detected in the region of VAV3, a gene that maps to the chromosome 1p13.3. In order to complement JPN-GWAS findings, we tested the association of rs1410403 with brain structure in healthy individuals and schizophrenic patients and performed exon resequencing of VAV3. We performed voxel-based morphometry (VBM) and mutation screening of VAV3. Four independent samples were used in the present study: (1) for VBM analysis, we used case-control sample comprising 100 patients with schizophrenia and 264 healthy controls, (2) mutation analysis was performed on a total of 321 patients suffering from schizophrenia, and 2 case-control samples (3) 729 unrelated patients with schizophrenia and 564 healthy comparison subjects, and (4) sample comprising 1511 cases and 1517 healthy comparison subjects and were used for genetic association analysis of novel coding variants with schizophrenia. The VBM analysis suggests that rs1410403 might affect the volume of the left superior and middle temporal gyri (P =. 011 and P =. 013, respectively), which were reduced in patients with schizophrenia compared with healthy subjects. Moreover, 4 rare novel missense variants were detected. The mutations were followed-up in large independent sample, and one of the novel variants (Glu741Gly) was associated with schizophrenia (P =. 02). These findings demonstrate that VAV3 can be seen as novel candidate gene for schizophrenia in which both rare and common variants may be related to increased genetic risk for schizophrenia in Japanese population. © 2012 The Author.

DOI： 10.1093/schbul/sbs038

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Objective</jats:title><jats:p>This study aimed to evaluate the effects of repeated treatments with the sedative antidepressants mirtazapine and trazodone on driving performance and cognitive function.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Nineteen healthy men received continuous nocturnal doses of 15‐mg mirtazapine , 25‐mg trazodone, or placebo for 8 days in a double‐blinded, three‐way crossover trial. Subjects were asked to perform three driving tasks (road tracking, car following, and harsh braking) using a driving simulator and cognitive tasks (the Wisconsin Card Sorting Test, Continuous Performance Test, and N‐back Test) at baseline and on Days 2 and 9. Stanford Sleepiness Scale scores were also assessed.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Mirtazapine significantly increased the standard deviation of lateral position in the road‐tracking task as compared with trazodone on Day 2. Mirtazapine significantly increased Stanford Sleepiness Scale scores as compared with trazodone and placebo. For the remaining tasks, no significant effects of treatment were observed.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>Acute treatment of mirtazapine impaired road‐tracking performance and increased sleepiness, but sedative effects disappeared under repeated administrations. Trazodone did not affect driving performance or cognitive function under acute or repeated administrations. Both initial sedative effects and pharmacological profiles should be taken into consideration when using sedative antidepressants. Copyright © 2013 John Wiley & Sons, Ltd.</jats:p></jats:sec>

DOI： 10.1002/hup.2321

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記述言語：英語   出版者・発行元：Palliative and Supportive Care  

Objective: Malignancy-related thromboembolism, also referred to as Trousseau's syndrome, can present as acute cerebral infarction, nonbacterial thrombotic endocarditis (NBTE), and migratory thrombophlebitis. Therefore, many physical, neurological, and psychological symptoms associated with Trousseau's syndrome may occur in the clinical course. Method: To illustrate this, we report a case of a male patient in his 50s with carcinomatous peritonitis caused by gastric cancer, with multiple cerebral infractions that developed during disease progression. The patient was admitted to our hospital for the treatment of side effects of chemotherapy, although he strongly hoped to go home as soon as possible. In addition to making social supports plans, we were required to perform intensive total palliative care, because of his physical pain, general fatigue, anorexia, abdominal and neck pain, and psychological issues (insomnia, delirium, depression, suicidal thoughts, self-mutilation, panic attacks, agoraphobia, fear of death, and feelings of hopelessness). Results: To the best of our knowledge, based on the literature search, this is the first reported case of Trousseau's syndrome described in the context of total palliative care, especially psychological care. Significance of results: We propose that neurological symptoms of Trousseau's syndrome cause these extensive mental disorders. Furthermore, because of the prognosis of Trousseau's syndrome, we should utilize our expertise fulfill the patient's wishes. © 2012 Cambridge University Press.

DOI： 10.1017/S1478951512000624

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Psychopharmacology  

Rationale: Japanese researchers have recently conducted studies using near-infrared spectroscopy (NIRS) to help diagnose psychiatric disorders based on changes in brain activity. However, the influence of psychotropic drugs on NIRS measurements has not been clarified. Objective: To assess the effects of sedative antidepressants on prefrontal cortex activity in healthy subjects using NIRS in a double-blinded, placebo-controlled, crossover trial. Methods: Nineteen healthy males received nocturnal doses of mirtazapine 15 mg, trazodone 25 mg, or placebo for eight consecutive days in rotation, with a washout period of more than 1 week between each rotation. Subjects performed a verbal fluency task during NIRS on a total of seven occasions during the study period: more than a week prior to receiving the first dose of the first medication; and on days 2 and 9 of each rotation. The number of words correctly generated during the task (behavioral performance) was also recorded. Stanford Sleepiness Scale (SSS) scores were determined each day. Results: Mirtazapine 15 mg significantly increased oxyhemoglobin (oxy-Hb) concentration change in NIRS on day 9, compared to trazodone 25 mg and placebo. Mirtazapine 15 mg significantly increased SSS on day 2, compared to the other conditions. No significant differences in behavioral performance were observed. Conclusions: Administration of mirtazapine for eight consecutive days affected oxy-Hb changes on NIRS. This result indicates that researchers should consider how certain types of antidepressant could influence brain function when the brain activity of patients with psychiatric disorders is assessed. © 2012 Springer-Verlag Berlin Heidelberg.

DOI： 10.1007/s00213-012-2885-8

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: The relationship between perceived rearing and the postpartum depressive state remains unclear. We aimed to examine whether perceived rearing is a risk factor for postpartum depression as measured by the Edinburgh Postnatal Depression Scale (EPDS), and whether the score of perceived rearing is affected by depressive mood (the state dependency of perceived rearing). Methods: Pregnant women (n = 448, mean age 31.8±4.2 years) completed the EPDS as a measure of depressive state in early pregnancy (T1), late pregnancy (around 36 weeks), and at 1 month postpartum (T2), and the Parental Bonding Instrument (PBI) at T1 as a measure of perceived rearing. Changes in the EPDS and the PBI scores from T1 to T2 were compared between the non depressive (ND) group and the postpartum depressive (PD) group. Results: There were no significant differences in any PBI category for perceived rearing between the ND and PD groups at T1. EPDS scores did not change significantly from T1 to T2 in the ND group but increased significantly in the PD group. The PBI maternal care score increased significantly in the ND group (p<0.01), while decreasing in the PD group (p<0.05). Additionally, in both the ND and PD groups, significant negative correlation was observed regarding change in the EPDS and PBI maternal care scores from T1 to T2 (r = -0.28, p = 0.013). Conclusions: The present study suggests that perceived rearing is not a strong risk factor for postpartum depression as measured by the EPDS. Furthermore, the results indicated the state dependency of the PBI maternal care score. © 2012 Hayakawa et al.

DOI： 10.1371/journal.pone.0050220

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記述言語：英語   出版者・発行元：Clinical Neuropharmacology  

OBJECTIVE: We examined the pain-relieving effect of duloxetine on chronic nonorganic orofacial pain (burning mouth syndrome and atypical odontalgia), considering the influence of baseline depressive symptoms. METHODS: In this study of 12 weeks, duloxetine was administered in a fixed-flexible dose of 20 to 40 mg/d to 41 patients with burning mouth syndrome and/or atypical odontalgia. Pain was evaluated using the visual analog scale (VAS) at baseline and at 2, 4, 6, 8, 10, and 12 weeks of treatment. Depressive symptoms were assessed using the Hamilton Depression Rating Scale at baseline and at 12 weeks of treatment. RESULTS: We analyzed the data from 29 patients who completed the study. The VAS score at 12 weeks of treatment was significantly lower than that at baseline. The time course of the VAS scores revealed its significant decrease from 2 weeks of treatment compared to the baseline score. To investigate the influence of baseline depressive symptoms on the pain-relieving effect of duloxetine, the subjects were divided into 2 groups based on the Hamilton Depression Rating Scale score on initial consultation: groups with (≥8) and without (≤7) depressive symptoms. Two-way repeated-measures analysis of variance revealed no significant interaction between time and initial presence or absence of depression. An additional intent-to-treat last-observation-carried-forward analysis including dropped-out patients revealed a similar result. CONCLUSION: Duloxetine significantly relieved chronic nonorganic orofacial pain. Its pain-relieving effect appeared from 2 weeks of treatment. Furthermore, the pain-relieving effects of duloxetine similarly appeared regardless of the presence or absence of baseline depressive symptoms. Copyright © 2012 by Lippincott Williams & Wilkins.

DOI： 10.1097/WNF.0b013e31827453fa

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Neuroscience Letters  

Disturbances of the circadian rhythm are involved in the pathophysiology of bipolar disorder (BD), schizophrenia (SCZ) and major depressive disorder (MDD). Specifically, because clock gene dysfunction is good candidate for enhancing the susceptibility to these psychiatric disorders, we selected two circadian rhythm-related genes (CSNK1D and CSNK1E) and investigated genetic associations of the genes with these three disorders. None of the SNPs showed a significant association with MDD, but a SNP (rs2075984) in CSNK1E and SNP (rs6502097) in CSNK1D were associated with SCZ (P= 0.0091, uncorrected) and BD (P= 0.030, uncorrected), respectively. To confirm these findings, we analyzed an independent dataset (maximum N= 3815) but found a lack of association (P= 0.63 for rs2075984 and P= 0.61 for rs6502097). The final meta-analysis showed no association between these SNPs with SCZ (P= 0.21) and BD (P= 0.53). These results do not support that genetic variation in CSNK1D and CSNK1E is a susceptibility factor for major psychiatric disorders in the Japanese population. © 2012 Elsevier Ireland Ltd.

DOI： 10.1016/j.neulet.2012.08.070

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記述言語：英語   出版者・発行元：Psychiatry and Clinical Neurosciences  

DOI： 10.1111/j.1440-1819.2012.02362.x

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Vaccine  

Objective: The aim of this study was to investigate the relationship between autism spectrum disorder (ASD) and general vaccinations, including measles-mumps-rubella (MMR) vaccine, in Japanese subjects, a population with high genetic homogeneity. Patients and methods: A case-control study was performed. Cases (n=189) were diagnosed with ASD, while controls (n=224) were volunteers from general schools, matched by sex and birth year to cases. Vaccination history and prenatal, perinatal, and neonatal factors from the Maternal and Child Health handbook, which was part of each subject's file, were examined. To determine the relationship between potential risk factors and ASD, crude odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated, and the differences in mean values of the quantitative variables between cases and controls were analyzed using an unpaired t-test. Moreover, MMR vaccination and the effect of the number of vaccine injections were investigated using a conditional multiple regression model. Results: For MMR vaccination, the OR was 1.04 (95% CI, 0.65-1.68), and no significant differences were found for the other vaccines. For all of the prenatal, perinatal and neonatal factors, there were no significant differences between cases and controls. Furthermore, regarding the presence of ASD, MMR vaccination and the number of vaccine injections had ORs of 1.10 (95% CI, 0.64-1.90) and 1.10 (95% CI, 0.95-1.26), respectively, in the conditional multiple regression model; no significant differences were found. Conclusions: In this study, there were not any convincing evidences that MMR vaccination and increasing the number of vaccine injections were associated with an increased risk of ASD in a genetically homogeneous population. Therefore, these findings indicate that there is no basis for avoiding vaccination out of concern for ASD. © 2012 Elsevier Ltd.

DOI： 10.1016/j.vaccine.2012.01.093

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記述言語：英語   出版者・発行元：American Journal of Medical Genetics, Part B: Neuropsychiatric Genetics  

Recent GWAS demonstrated an association between candidate genes located at region 6p22.1 and schizophrenia. This region has been reported to house certain candidate SNPs, which may be associated with schizophrenia at HIST1H2BJ, PRSS16, and PGBD1. These genes may presumably be associated with pathophysiology in schizophrenia, namely epigenetics and psychoneuroimmunology. A three-step study was undertaken to focus on these genes with the following aims: (1) whether these genes may be associated in Japanese patients with schizophrenia by performing a 1st stage case-control study (514 cases and 706 controls) using Japanese tagging SNPs; (2) if the genetic regions of interest for the disease from the 1st stage of analyses were found, re-sequencing was performed to search for new mutations; (3) finally, a replication study was undertaken to confirm positive findings from the 1st stage were reconfirmed using a larger number of subjects (2,583 cases and 2,903 controls) during a 2nd stage multicenter replication study in Japan. Genotyping was performed using TaqMan PCR method for the selected nine tagging SNPs. Although three SNPs situated at the 3′ side of PGBD1; rs3800324, rs3800327, and rs2142730, and two-window haplotypes between rs3800327 and rs2142730 showed positive associations with schizophrenia, these associations did not have enough power to sustain significance during the 2nd stage replication study. In addition, re-sequencing for exons 5 and 6 situated at this region did not express any new mutations for schizophrenia. Taken together these results indicate that the genes HIST1H2BJ, PRSS16, and PGBD1 were not associated with Japanese patients with schizophrenia. © 2012 Wiley Periodicals, Inc.

DOI： 10.1002/ajmg.b.32049

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Aging - Clinical and Experimental Research  

Background and aims: Methods of assessing driving abilities in the elderly are urgently needed. Although the driving simulator (DS) appears to be a safe and cost-effective method of objectively evaluating driving performance, it may pose adaptation problems for elderly adults. In this study, we examined age-related adaptation deficits on the DS. Methods: Healthy young adults (n=15) and healthy elderly persons (n=17) completed some neuropsychological tests, and then performed a road-tracking task with the DS, which was repeated four times (Trials 1-4). Results: After simulated driving in DS, simulator sickness (SS) was observed in 18.8% of participants. The frequency of SS was 29.4% in elderly adults and 6.7% in young adults, and 17.6% of the elderly participants dropped out of the experiment. Performance on the Necker cube copying task was significantly correlated with the onset of SS. Driving performance also showed a significant interaction between group and trial, for both driving accuracy and vehicle speed. In addition, the performance of elderly adults significantly improved between trials 1 and 4, reaching a plateau in trial 4, whereas that of young adults did not change across trials. Conclusion: This study provides preliminary evidence of slower adaptation to a DS-based driving task by older adults, which was associated with cognitive aging. Age affected driving accuracy and velocity when a road-tracking task was simply repeated. It is concluded that the capacity of elderly people to adapt to DS environments should be taken into consideration when evaluating their performance on DS tasks. ©2012, Editrice Kurtis.

DOI： 10.1007/BF03325260

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Schizophrenia is a complex psychiatric disorder characterized by positive symptoms, negative symptoms, and cognitive impairment. MAGI2, a relatively large gene (~1.5 Mbps) that maps to chromosome 7q21, is involved in recruitment of neurotransmitter receptors such as AMPA- and NMDA-type glutamate receptors. A genetic association study designed to evaluate the association between MAGI2 and cognitive performance or schizophrenia has not been conducted. In this case-control study, we examined the relationship of single nucleotide polymorphism (SNP) variations in MAGI2 and risk for schizophrenia in a large Japanese sample and explored the potential relationships between variations in MAGI2 and aspects of human cognitive function related to glutamate activity. Based on the result of first schizophrenia genome-wide association study in a Japanese population (JGWAS), we selected four independent SNPs and performed an association study using a large independent Japanese sample set (cases 1624, controls 1621). Wisconsin Card Sorting Test (WCST) was used to evaluate executive function in 114 cases and 91 controls. We found suggestive evidence for genetic association of common SNPs within MAGI2 locus and schizophrenia in Japanese population. Furthermore in terms of association between MAGI2 and cognitive performance, we observed that genotype effect of rs2190665 on WCST score was significant (p = 0.034) and rs4729938 trended toward significance (p = 0.08). In conclusion, although we could not detect strong genetic evidence for association of common variants in MAGI2 and increased schizophrenia risk in a Japanese population, these SNPs may increase risk of cognitive impairment in schizophrenic patients. © 2012 Koide et al.

DOI： 10.1371/journal.pone.0036836

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Bulletin  

Background: Our genome-wide association study of schizophrenia found association signals at the Kalirin gene (KALRN) and EPH receptor B1 gene (EPHB1) in a Japanese population. The importance of these synaptogenic pathway genes in schizophrenia is gaining independent supports. Although there has been growing interest in rare (<1%) missense mutations as potential contributors to the unexplained heritability of schizophrenia, there are no population-based studies targeting rare (<1%) coding mutations with a larger effect size (eg, OR >1.5) in KALRN or EPHB1.Methods and Results:The present study design consisted of 3 phases. At the discovery phase, we conducted resequencing analyses for all exon regions of KALRN and EPHB1 using a DNA microarray-based method. Seventeen rare (<1%) missense mutations were discovered in the first sample set (320 schizophrenic patients). After the prioritization phase based on frequencies in the second sample set (729 cases and 562 controls), we performed association analyses for each selected mutation using the third sample set (1511 cases and 1517 controls), along with a combined association analysis across all selected mutations. In KALRN, we detected a significant association between schizophrenia and P2255T (OR = 2.09, corrected P =. 048, 1 tailed); this was supported in the combined association analysis (OR = 2.07, corrected P =. 006, 1 tailed). We found no evidence of association of EPHB1 with schizophrenia. In silico analysis indicated the functional relevance of these rare missense mutations.Conclusion:We provide evidence that multiple rare (<1%) missense mutations in KALRN may be genetic risk factors for schizophrenia. © 2010 The Author.

DOI： 10.1093/schbul/sbq118

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

<jats:sec><jats:title>Objectives</jats:title><jats:p>Serum brain‐derived neurotrophic factor (BDNF) levels are reduced in depressed patients, and successful antidepressant treatment leads to increases in BDNF levels. However, little is known about how psychotropic drugs affect the mechanism of the human response to mental stress. We investigated the influence of psychotropic drugs on plasma BDNF levels under mental stress using a driving simulator (DS) task.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Fourteen healthy male volunteers received one of four drugs, diazepam (5 mg), tandospirone (20 mg), paroxetine (10 mg), and matched placebo, in a double‐blind, crossover manner. Subjects were asked to perform the DS task 4 h post‐dosing. Plasma BDNF levels were measured before and after the DS task.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Plasma BDNF levels under the placebo, diazepam, and tandospirone conditions significantly decreased after the DS task compared with before the task. Conversely, no significant differences in plasma BDNF levels were detected under the paroxetine condition.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>As these three psychotropic drugs have differential effects on plasma BDNF levels under mental stress after 4 h post‐dosing, antidepressants, unlike anxiolytics, might have a prompt positive effect on the mental stress response. Copyright © 2012 John Wiley & Sons, Ltd.</jats:p></jats:sec>

DOI： 10.1002/hup.2220

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記述言語：英語   出版者・発行元：Progress in Neuro-Psychopharmacology and Biological Psychiatry  

This study aimed to estimate the prevalence of sexual dysfunction, evaluated by the Nagoya Sexual Function Questionnaire (NSFQ), and hyperprolactinemia in patients with schizophrenia and examine a relationship between sexual dysfunction and serum prolactin levels. This cross-sectional, comparative study was performed using a sample comprising 195 Japanese schizophrenic in- and outpatients treated with antipsychotics (117 males and 78 females). Data were collected from October 2009 to January 2010 using single, cross-sectional ratings of sexual function assessed by the NSFQ and concurrent measurement of serum prolactin levels. The prevalence of sexual dysfunction in patients with schizophrenia was high (males 66.7%; females 79.5%). Hyperprolactinemia (> 25. ng/ml) was highly prevalent among schizophrenia patients, affecting 53.8% of females and 51.3% of males. Among female patients, 16.7% had prolactin levels > 100. ng/ml. There was no relationship between sexual dysfunction and serum prolactin levels. The present study demonstrated a higher prevalence of sexual dysfunction and hyperprolactinemia in Japanese schizophrenia patients. Clinicians should keep these problems in mind and discuss potential solutions with patients to improve patients' quality of life and adherence to therapy. © 2011 Elsevier Inc.

DOI： 10.1016/j.pnpbp.2011.11.016

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: Recent studies have displayed increased interest in examining the relationship between personality traits and the onset, treatment response patterns, and relapse of depression. This study aimed to examine whether or not harm avoidance (HA) was a risk factor for postpartum depression measured by the Edinburgh Postnatal Depression Scale (EPDS) and the state dependency of HA. Methods: Pregnant women (n=460; mean age 31.9±4.2 years) who participated in a prenatal program completed the EPDS as a measure of depressive state and the Temperament and Character Inventory (TCI) as a measure of HA during three periods: early pregnancy (T1), late pregnancy (around 36 weeks), and 1 month postpartum (T2). Changes in EPDS and HA scores from T1 to T2 were compared between the non depressive (ND) group and the postpartum depressive (PD) group. Results: There was no significant difference in the level of HA between the ND and PD groups at T1. In the ND group, EPDS and HA scores did not change significantly from T1 to T2. In the PD group, both scores increased significantly from T1 to T2 (EPDS, p<0.0001; HA, p<0.048). In the ND and PD groups, a significant positive correlation was observed in changes in EPDS and HA scores from T1 to T2 (r=0.31, p=0.002). Conclusions: These results suggest that HA cannot be considered a risk factor for the development of postpartum depression measured by EPDS. Furthermore, HA may be state dependent. © 2012 Furumura et al.

DOI： 10.1371/journal.pone.0034725

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMJ Open  

Objectives: The present study aimed to validate screening tools that could be used to identify depression among workers. Design: Diagnostic test study. Settings: Workers from three Japanese companies agreed to participate. Participants: Recruitment for the group 1 occurred between January 2001 and February 2004, and 89 participants (81 men and 8 women with a mean age of 38.4±6.6 years) (98.8%) took part in the study. Recruitment for the group 2 occurred between July 2000 and February 2004, and 1500 participants (1408 men and 92 women with a mean age of 40.9±7.2 years) (94.2%) took part in the study. Demographic data are shown in supplementary table 1. Interventions: Primary and secondary outcome measures: the Beck Depression Inventory (BDI) and a two-question case-finding instrument (TQI) were administered to 89 workers and Mini-International Neuropsychiatric Interview was conducted to verify the diagnosis of depression. A second group of 1500 workers completed the BDI and TQI to detect possible sample bias for the distribution of depression. Specificity, sensitivity and positive predictive value were calculated in order to obtain the optimal cut-off scores for BDI and TQI and receiver operating characteristic curves, and Youden Index were applied to further refine the optimal cut-off scores. Results: When paired together, BDI score ≥10 and TQI score of 2 adequately identified workers who had major depressive disorder and those who had other psychiatric disorders that are frequently comorbid with major depressive disorder. Conclusions: The combination of BDI score &ge10 and TQI score of 2 can adequately screen for current and potential cases of depression among workers. Furthermore, BDI and TQI offer the advantage of being relatively easy to administer to a large number of workers. Early detection of depression could improve treatment outcomes and decrease economic burden. Trail registration:.

DOI： 10.1136/bmjopen-2011-000596

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記述言語：英語   出版者・発行元：Hindawi Limited  

<jats:p><jats:italic>Aim</jats:italic>. Cognitive impairment in schizophrenia strongly relates to social outcome and is a good candidate for endophenotypes. When we accurately measure drug efficacy or effects of genes or variants relevant to schizophrenia on cognitive impairment, clinical factors that can affect scores on cognitive tests, such as age and severity of symptoms, should be considered. To elucidate the effect of clinical factors, we conducted multiple regression analysis using scores of the Continuous Performance Test Identical Pairs Version (CPT-IP), which is often used to measure attention/vigilance in schizophrenia.<jats:italic>Methods</jats:italic>. We conducted the CPT-IP (4-4 digit) and examined clinical information (sex, age, education years, onset age, duration of illness, chlorpromazine-equivalent dose, and Positive and Negative Symptom Scale (PANSS) scores) in 126 schizophrenia patients in Japanese population. Multiple regression analysis was used to evaluate the effect of clinical factors.<jats:italic>Results</jats:italic>. Age, chlorpromazine-equivalent dose, and PANSS-negative symptom score were associated with mean d<jats:sup>′</jats:sup>score in patients. These three clinical factors explained about 28% of the variance in mean d<jats:sup>′</jats:sup>score.<jats:italic>Conclusions</jats:italic>. As conclusion, CPT-IP score in schizophrenia patients is influenced by age, chlorpromazine-equivalent dose and PANSS negative symptom score.</jats:p>

DOI： 10.1155/2012/970131

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：BMJ Open  

Objectives: This study investigated what clinical and sociodemographic factors affected Wisconsin Card Sorting Test (WCST) factor scores of patients with schizophrenia to evaluate parameters or items of the WCST. Design: Cross-sectional study. Setting: Patients with schizophrenia from three hospitals participated. Participants: Participants were recruited from July 2009 to August 2011. 131 Japanese patients with schizophrenia (84 men and 47 women, 43.5±13.8 years (mean±SD)) entered and completed the study. Participants were recruited in the study if they (1) met DSM-IV criteria for schizophrenia; (2) were physically healthy and (3) had no mood disorders, substance abuse, neurodevelopmental disorders, epilepsy or mental retardation. We examined their basic clinical and sociodemographic factors (sex, age, education years, age of onset, duration of illness, chlorpromazine equivalent doses and the positive and negative syndrome scale (PANSS) scores). Primary and secondary outcome measures: All patients carried out the WCST Keio version. Five indicators were calculated, including categories achieved (CA), perseverative errors in Milner (PEM) and Nelson (PEN), total errors (TE) and difficulties of maintaining set (DMS). From the principal component analysis, we identified two factors (1 and 2). We assessed the relationship between these factor scores and clinical and sociodemographic factors, using multiple logistic regression analysis. Results: Factor 1 was mainly composed of CA, PEM, PEN and TE. Factor 2 was mainly composed of DMS. The factor 1 score was affected by age, education years and the PANSS negative scale score. The factor 2 score was affected by duration of illness. Conclusions: Age, education years, PANSS negative scale score and duration of illness affected WCST factor scores in patients with schizophrenia. Using WCST factor scores may reduce the possibility of type I errors due to multiple comparisons.

DOI： 10.1136/bmjopen-2012-001340

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLoS ONE  

Background: Using a knock-out mouse model, it was shown that NETO1 is a critical component of the NMDAR complex, and that loss of Neto1 leads to impaired hippocampal long term potentiation and hippocampal-dependent learning and memory. Moreover, hemizygosity of NETO1 was shown to be associated with autistic-like behavior in humans. Purpose of the Research: We examined the association between schizophrenia and the neuropilin and tolloid-like 1 gene (NETO1). First, we selected eight single nucleotide polymorphisms (SNPs) within the NETO1 locus, based on the Japanese schizophrenia genome wide association study (JGWAS) results and previously conducted association studies. These SNPs were genotyped in the replication sample comprised of 963 schizophrenic patients and 919 healthy controls. We also examined the effect of associated SNPs on scores in the Continuous Performance Test and the Wisconsin Card Sorting Test Keio version (schizophrenic patients 107, healthy controls 104). Results: There were no significant allele-wise and haplotype-wise associations in the replication analysis after Bonferroni correction. However, in meta-analysis (JGWAS and replication dataset) three association signals were observed (rs17795324: p = 0.028, rs8098760: p = 0.017, rs17086492: p = 0.003). These SNPs were followed up but we could not detect the allele-specific effect on cognitive performance measured by the Continuous performance test (CPT) and Wisconsin Card Sorting test (WCST). Major Conclusions: We did not detect evidence for the association of NETO1 with schizophrenia in the Japanese population. Common variants within the NETO1 locus may not increase the genetic risk for schizophrenia in the Japanese population. Additionally, common variants investigated in the current study did not affect cognitive performance, as measured by the CPT and WCST. © 2011 Banno et al.

DOI： 10.1371/journal.pone.0028929

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記述言語：英語   出版者・発行元：Biological Psychiatry  

Background: Solid evidence links schizophrenia (SZ) susceptibility to neurodevelopmental processes involving tyrosine phosphorylation-mediated signaling. Mouse studies implicate the Ptpra gene, encoding protein tyrosine phosphatase RPTPα, in the control of radial neuronal migration, cortical cytoarchitecture, and oligodendrocyte differentiation. The human gene encoding RPTPα, PTPRA, maps to a chromosomal region (20p13) associated with susceptibility to psychotic illness. Methods: We characterized neurobehavioral parameters, as well as gene expression in the central nervous system, of mice with a null mutation in the Ptpra gene. We searched for genetic association between polymorphisms in PTPRA and schizophrenia risk (two independent cohorts, 1420 cases and 1377 controls), and we monitored PTPRA expression in prefrontal dorsolateral cortex of SZ patients (35 cases, 2 control groups of 35 cases). Results: We found that Ptpra -/- mice reproduce neurobehavioral endophenotypes of human SZ: sensitization to methamphetamine-induced hyperactivity, defective sensorimotor gating, and defective habituation to a startle response. Ptpra loss of function also leads to reduced expression of multiple myelination genes, mimicking the hypomyelination-associated changes in gene expression observed in postmortem patient brains. We further report that a polymorphism at the PTPRA locus is genetically associated with SZ, and that PTPRA mRNA levels are reduced in postmortem dorsolateral prefrontal cortex of subjects with SZ. Conclusions: The implication of this well-studied signaling protein in SZ risk and endophenotype manifestation provides novel entry points into the etiopathology of this disease. © 2011 Society of Biological Psychiatry.

DOI： 10.1016/j.biopsych.2011.06.016

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Psychosomatic Research  

Background: The primary objective of this study was to analyze the pattern of depressive moods related to pregnancy and postpartum in a dataset collected prospectively. A secondary objective was to assess the association between (1) low moods during pregnancy and postpartum depressive symptoms, and (2) maternity blues and postpartum depressive symptom. Method: Three hundred eighty-seven women completed self-administered questionnaires. The participants were asked to respond to Stein's Maternity Blues Scale (Stein's Scale) on five consecutive days after delivery and to the Edinburgh Postnatal Depression Scale (EPDS) during both pregnancy and postpartum. Results: 32.0% of the women were identified as having a score of more than 9 on EPDS during pregnancy and postpartum. 21.6% of the women scored above the Stein's Scale cut-off point for at least 1 day during the 5-day period following delivery. The odds ratio (95% CI) for postpartum low mood if the women experienced low mood during pregnancy was 4.46 (2.48-8.04), while the odds ratio for postpartum depressive symptoms if the women experienced symptoms of maternity blues was 5.48 (2.74-10.98). In logistic regression analysis, the number of days in which women scored over the cut-off point by Stein's Scale proved to be the more significant predictor of scoring over the EPDS cutoff (8/9) [OR (95% CI)=2.74 (1.89-3.96)]. Conclusion: The rate of maternity blues in our findings was similar to the rates previously reported in Japan, but lower than the rates observed in Western countries. Furthermore, our longitudinal study confirms the likelihood of subsequent postpartum depressive symptoms if low moods during pregnancy and/or maternity blues are present. © 2010 Elsevier Inc.

DOI： 10.1016/j.jpsychores.2011.02.001

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記述言語：英語   出版者・発行元：Progress in Neuro-Psychopharmacology and Biological Psychiatry  

Methamphetamine (MAP) dependence is a highly heritable and aberrant dopaminergic signaling that has been implicated in the disease. Glial cell line-derived neurotrophic factor (GDNF), which plays an important role in the survival of dopaminergic neurons, may be involved in this disorder. In this study, we examined the association between GDNF and MAP dependence using a Japanese population-based sample. We selected eight single nucleotide polymorphisms (SNPs) in the GDNF locus for the association analysis. When patients with MAP dependence were divided into two subgroups consisting of multi-substance and MAP-only users, we detected a significant association between these two groups and the tagging SNP, rs2910704 (after Bonferroni's correction; allele P = 0.034). Thus, GDNF is likely to be related to the severity of MAP use in the Japanese population. © 2011 Elsevier Inc.

DOI： 10.1016/j.pnpbp.2011.04.003

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

Objective This study aims to validate a new user-friendly sexual function questionnaire (Nagoya Sexual Function Questionnaire [NSFQ]) for schizophrenic patients taking antipsychotics. Methods Schizophrenic outpatients (men = 30, women = 30) were asked to fill out the NSFQ at initial entry into the research program (Time1) and again 1 to 2 weeks later (Time2). To assess the convergent validity of the NSFQ, at Time1, subjects were asked to fill out the Japanese version of the Udvalg for Kliniske Undersogekser Side Effect Rating Scale (UKU). To assess the discriminant validity of the NSFQ, at Time1, subjects were also asked to fill out the Japanese version of Epworth Sleepiness Scale. Results Results from Cronbach's alpha analysis indicated that the NSFQ demonstrated excellent internal consistency and scale reliability. The NSFQ also demonstrated strong test-retest reliability. The NSFQ total score was highly correlated with the UKU total score. The NSFQ was shown to have good convergent validity with the UKU. The NSFQ total score was not correlated with the Japanese version of Epworth Sleepiness Scale total score. Conclusions This study revealed the internal consistency, test-retest reliability, and convergent and discriminant validities of the NSFQ. © 2011 John Wiley & Sons, Ltd.

DOI： 10.1002/hup.1205

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Biological Psychiatry  

Background Genome-wide association studies have detected a small number of weak but strongly supported schizophrenia risk alleles. Moreover, a substantial polygenic component to the disorder consisting of a large number of such alleles has been reported by the International Schizophrenia Consortium. Method We report a Japanese genome-wide association study of schizophrenia comprising 575 cases and 564 controls. We attempted to replicate 97 markers, representing a nonredundant panel of markers derived mainly from the top 150 findings, in up to three data sets totaling 1990 cases and 5389 controls. We then attempted to replicate the observation of a polygenic component to the disorder in the Japanese and to determine whether this overlaps that seen in UK populations. Results Single-locus analysis did not reveal genome-wide support for any locus in the genome-wide association study sample (best p = 6.2 × 10 -6) or in the complete data set in which the best supported locus was SULT6B1 (rs11895771: p = 3.7 × 10-5 in the meta-analysis). Of loci previously supported by genome-wide association studies, we obtained in the Japanese support for NOTCH4 (rs2071287: pmeta = 5.1 × 10 -5). Using the approach reported by the International Schizophrenia Consortium, we replicated the observation of a polygenic component to schizophrenia within the Japanese population (p = .005). Our trans JapanUK analysis of schizophrenia also revealed a significant correlation (best p = 7.0 × 10-5) in the polygenic component across populations. Conclusions These results indicate a shared polygenic risk of schizophrenia between Japanese and Caucasian samples, although we did not detect unequivocal evidence for a novel susceptibility gene for schizophrenia. © 2011 Society of Biological Psychiatry.

DOI： 10.1016/j.biopsych.2010.07.010

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Affective Disorders  

Background: Depression influences a worker's productivity and health substantially. Recently, the Japanese society and government reported that working overtime is one of the primary causes of depression and suicide in workers. However, only a few studies have investigated the relation between overtime hours and mental health status, and conclusions vary. In addition, prior findings are inconsistent in terms of the relation between depression and lifestyle factors, including alcohol intake and smoking. Additional studies are required to clarify the relation between possible risk factors and depression in Japanese workers. Methods: We performed a case-control and a cohort study. Subjects were office workers in four Japanese companies. Diagnosis of depression was made by two psychiatrists who conducted independent clinical interviews using DSM-IV-TR criteria. Results: There was no significant association between working overtime and the onset of depression. The frequency of alcohol intake was significantly related to the onset of depression. We also found a significant relation between younger age and depression onset. Body mass index and physical illness, including diabetes mellitus, had no significant association with depression onset. Limitations: Data were self-reported and the number of included female workers was small. Conclusions: Reducing working hours alone is unlikely to be effective in preventing workers' depression. Additional countermeasures are needed, including a reduction in alcohol intake and work stress. Considerations for younger workers are also needed. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jad.2010.06.015

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記述言語：英語   出版者・発行元：Psychiatry and Clinical Neurosciences  

DOI： 10.1111/j.1440-1819.2011.02238.x

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記述言語：英語   出版者・発行元：The Japanese Society of Clinical Neuropsychopharmacology  

In this manuscript, we present a case report of a patient suffering from dementia with Lewy bodies who experienced not only visual but also four other sensory hallucinations, which were interdependent and may have influenced the patient's behavior. To the best of our knowledge, based on our search of the literature, this is the first such reported case of dementia with Lewy bodies.In this paper, we review the literature related to drug therapy for dementia with Lewy bodies, and propose, based on our clinical observations, that cholinesterase inhibitors, including donepezil, should be used as first-line drugs for the treatment and management of psychotic symptoms, including all five sensory hallucinations, in dementia with Lewy bodies.

DOI： 10.5234/cnpt.2.56

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その他リンク： http://search.jamas.or.jp/link/ui/2013137088

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

Methylenetetrahydrofolate reductase (MTHFR) is a critical molecule for single-carbon transfer reactions. Recent evidence suggests that polymorphisms of MTHFR are related to neural tube deficits and the pathogenesis of schizophrenia. While several studies have demonstrated associations between the gene encoding the MTHFR (MTHFR) polymorphisms and schizophrenia, these studies lack consistency. Therefore, we conducted a gene-wide association study (patients with schizophrenia = 696, control subjects = 747) and performed imputation analysis. Additionally, we performed meta-analysis on currently available data from 18 studies for two common functional polymorphisms (rs1801131 and rs1801133). There were no significant associations with schizophrenia in the single marker analysis for the seven tagging SNPs of MTHFR. In the haplotypic analysis, a nominally significant association was observed between the haplotypes, which included four SNPs (rs1801133, rs17421511, rs17037396, and rs9651118) and the schizophrenic patients. Additionally, the imputation analysis demonstrated there were several associated markers on the MTHFR chromosomal region. However, confirmatory analyses of three tagging SNPs (rs1801133, rs17037396, and rs9651118) and the top SNP (rs17421511) for the imputation results (patients with schizophrenia = 797, control subjects = 1025) failed to replicate the haplotypic analysis and the imputation results. These findings suggest that MTHFR polymorphisms are unlikely to be related to the development of schizophrenia in the Japanese population. However, since our meta-analysis results demonstrated strong support for association of rs1801133 with schizophrenia, further replication studies based on a gene-wide approach need to be considered. © 2010 Elsevier B.V.

DOI： 10.1016/j.schres.2010.07.011

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

Genetic factors and environmental influences contribute to the determination of human personality traits. This study examined the influence of serotonin receptor 2A polymorphisms and parental rearing on temperament. Subjects included 1245 Japanese volunteers (592 males and 653 females). Three single-nucleotide polymorphisms (SNPs) (rs6311, rs6313 and rs643627) were selected for genotyping. All subjects completed the 125-item Japanese short version of the temperament and character inventory, and 572 completed the Japanese version of the Parental Bonding Instrument. All SNPs were in Hardy-Weinberg equilibrium. A significant association (P=0.0026) was observed between rs643627 and novelty seeking in females. On the other hand, significant effects of maternal overprotection to harm avoidance (HA) were seen for rs6311 (P=0.0005), rs6313 (P=0.0004) and rs643627 (P=0.0003) in males only. In terms of the interaction of genotype and maternal overprotection with HA, interaction was observed in rs6311 (P=0.0290) and rs6313 (P=0.0230) in females only. Our results indicate a relationship between the rs643627 polymorphism and novelty seeking in females. In terms of serotonin receptor 2A gene polymorphisms and maternal overprotection, our findings suggest the existence of a gene-environmental interaction that influences HA. © 2010 The Japan Society of Human Genetics All rights reserved.

DOI： 10.1038/jhg.2010.110

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

We examined the association of schizophrenia (SCZ) and dihydropyrimidinase- like 2 (DPYSL2), also known as collapsin response mediator protein 2, which regulates axonal growth and branching. We genotyped 20 tag single nucleotide polymorphisms (SNPs) in 1464 patients and 1310 controls. There were two potential associations in a screening population of 384 patients and 384 controls (rs2585458: P=0.046, rs4733048: P=0.014). However, we could not replicate these associations in a confirmatory population of 1080 patients and 926 controls (rs2585458: P=0.39, rs4733048: P=0.70) or a joint analysis (rs2585458: P=0.72, rs4733048: P=0.10). We conclude that DPYSL2 does not have a major function in SCZ in Japanese subjects. © 2010 The Japan Society of Human Genetics All rights reserved.

DOI： 10.1038/jhg.2010.38

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

The aim of the current study was to examine the association of KREMEN1 and DKK1, two wnt pathway-related genes with schizophrenia in Japanese subjects. We genotyped 16 common genetic variants within the aforementioned genes and examined their associations with schizophrenia. Results demonstrated that a common variant in the promoter region of KREMEN1 might modulate the risk of schizophrenia in the Japanese. However, further replication will be needed for conclusive interpretation of the effect of this locus on the pathogenesis of schizophrenia. © 2010 Elsevier B.V.

DOI： 10.1016/j.schres.2010.01.014

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Journal of Medical Genetics, Part B: Neuropsychiatric Genetics  

Chromosome 22q13 region has been implicated in schizophrenia in several linkage studies. Genes within this locus are therefore promising genetic and biologic candidate genes for schizophrenia if they are expressed in the brain or predicted to have some role in brain development. A recent study reported that bromodomain-containing 1 gene (BRD1), located in 22q13, showed an association with schizophrenia in a Scottish population. Except for being a putative regulator of transcription, the precise function of BRD1 is not clear; however, expression analysis of BRD1 mRNA revealed widespread expression in mammalian brains. In our study, we explored the association of BRD1 with schizophrenia in a Japanese population (626 cases and 770 controls). In this association analysis, we first examined 10 directly genotyped single-nucleotide polymorphisms (SNPs) and 20 imputed SNPs. Second, we compared the BRD1 mRNA levels between cases and controls using lymphoblastoid cell lines (LCLs) derived from29 cases and 30 controls. Although the SNP (rs138880) that previously has been associated with schizophrenia showed the same trend in the Japanese population, no significant association was detected between BRD1 and schizophrenia in our study. Similarly, no significant differences in BRD1 mRNA levels in LCLs were detected. Taken together, we could not strongly show that common SNPs in the BRD1 gene account for a substantial proportion of the genetic risk for schizophrenia in the Japanese population. © 2009 Wiley-Liss, Inc.

DOI： 10.1002/ajmg.b.31048

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

Recently, ubiquitin-specific peptidase 46 (Usp46) has been identified as a quantitative trait gene responsible for immobility in the tail suspension test and forced swimming test in mice. Mice with 3-bp deletion in Usp46 exhibited loss of behavioral despair under inescapable stresses in addition to abnormalities in circadian behavioral rhythms and the GABAergic system. Considering the face and construct validity as an animal model for bipolar disorder, we explored an association of USP46 and bipolar disorder in a Japanese population. We also examined an association of USP46 and schizophrenia. We found nominal evidence for an association of rs12646800 and schizophrenia. This association was not significant after correction for multiple testing. No significant association was detected for bipolar disorder. In conclusion, our data argue against the presence of any strong genetic susceptibility factors for bipolar disorder or schizophrenia in the region USP46. © 2010 The Japan Society of Human Genetics All rights reserved.

DOI： 10.1038/jhg.2009.139

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Biological Psychiatry  

Background: Copy number variants (CNVs) have been shown to increase the risk to develop schizophrenia. The best supported findings are at 1q21.1, 15q11.2, 15q13.3, and 22q11.2 and deletions at the gene neurexin 1 (NRXN1). Methods: In this study, we used Affymetrix 5.0 arrays to investigate the role of rare CNVs in 575 patients with schizophrenia and 564 control subjects from Japan. Results: There was a nonsignificant trend for excess of rare CNVs in schizophrenia (p = .087); however, we did not confirm the previously implicated association for very large CNVs (>500 kilobase [kb]) in this population. We provide support for three previous findings in schizophrenia, as we identified one deletion in a case at 1q21.1, one deletion within NRXN1, and four duplications in cases and one in a control subject at 16p13.1, a locus first implicated in autism and later in schizophrenia. Conclusions: In this population, we support some of the previous findings in schizophrenia but could not find an increased burden of very large (>500 kb) CNVs, which was proposed recently. However, we provide support for the role of CNVs at 16p13.1, 1q21.1, and NRXN1. © 2010 Society of Biological Psychiatry.

DOI： 10.1016/j.biopsych.2009.08.034

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記述言語：英語   出版者・発行元：The Japanese Society of Clinical Neuropsychopharmacology  

Serotonin norepinephrine reuptake inhibitors (SNRIs) work by inhibiting the reuptake of the neurotransmitters serotonin and norepinephrine. This results in an increase in the extracellular concentrations of serotonin and norepinephrine and therefore an increase in neurotransmission. The three SNRIs milnacipran, duloxetine, and venlafaxine have different affinity and selectivity profiles. Milnacipran and duloxetine inhibit the reuptake of serotonin and norepinephrine at all doses. In contrast, venlafaxine selectively inhibits the reuptake of serotonin at low doses, but this serotonin transporter specificity disappears as the dose increases (i.e., it acts as an SNRI). In addition, the SNRIs, as well as the SSRIs, have few significant side effects because they interact only infrequently with other neurotransmitter receptors. Milnacipran and duloxetine seem to have fewer side effects and essentially show no cardiovascular toxicity. However, venlafaxine appears the least well-tolerated because of a high incidence of serotonergic adverse events (nausea, sexual dysfunction, withdrawal problems) and dose-dependent hypertension. SNRIs have increased efficacy and good tolerability and are used for the treatment of anxiety disorders and chronic pain. Our results suggest that SNRIs may have more advantages than other kinds of antidepressants and that the differences in the pharmacological profiles of each should be understood when using them.

DOI： 10.5234/cnpt.1.10

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その他リンク： http://search.jamas.or.jp/link/ui/2012047008

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

A variety of evidence suggests brain-derived neurotrophic factor (BDNF) as a candidate gene for schizophrenia, and several genetic studies have shown a significant association between the disease and certain SNPs within BDNF (specifically, Val66Met and C270T). According to a recent study, the functional microsatellite marker BDNF-LCPR (BDNF-linked complex polymorphic region), which affects the expression level of BDNF, is associated with bipolar disorder. The goals of our current study were to 1) evaluate the quality of HapMap-based linkage disequilibrium (LD) tagging of BDNF-LCPR, 2) examine whether these tagging SNPs are associated with schizophrenia in a Japanese population, and 3) conduct a meta-analysis of the two most extensively studied polymorphisms: Val66Met and C270T. We genotyped eight tagging SNPs, including Val66Met and C270T. Our LD evaluation showed that BDNF-LCPR could be represented by these tagging SNPs in controls (with 73.5% allelic coverage). However, the functional A1 allele was not captured due to its low minor allele frequency (2.2%). In a case-control study (1117 schizophrenics and 1102 controls), no association was found in single-marker or multimarker analysis. Moreover, in a meta-analysis, the Val66Met polymorphism was not associated with schizophrenia, whereas C270T showed a trend for association in a fixed model (p = 0.036), but not in a random model (p = 0.053). From these findings, we conclude that if BDNF is indeed associated with schizophrenia, the A1 allele in BDNF-LCPR would be the most promising candidate. Further LD evaluation, as well as an association study in which BDNF-LCPR is genotyped directly, would be required for a more conclusive result. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.schres.2009.03.040

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.neures.2009.09.1441

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Human Genetics  

PLP1 is one of the major myelin-related genes. A large body of expression-based studies showed significantly lower levels of the PLP1 messenger ribonucleic acid (mRNA) transcripts in schizophrenia. Moreover, one family-based study identified a weak association signal in a male subset using 487 Chinese family trios. We carried out a population-based association study between PLP1 and schizophrenia in 1,640 subjects. Our data does not support genetic variation in close vicinity or within PLP1 locus as a susceptibility factor. © 2008 The Japan Society of Human Genetics and Springer.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Neuroscience Letters  

The FXYD domain containing ion transport regulator 6 (FXYD6) gene is located within a region of chromosome 11 (11q23.3) that has been shown by a number of genome scans to be one of the most well-established linkages to schizophrenia. FXYD6 encodes the protein phosphohippolin, which is primarily expressed in the brain. Phosphohippolin modulates the kinetic activity of Na,K-ATPase and has long-term physiological importance in maintaining cation homeostasis. A recent study reported that FXYD6 was associated with schizophrenia in the United Kingdom samples. Applying the gene-based association concept, we carried out an association study regarding FXYD6 and schizophrenia in a Japanese population, with a sample consisting of 2026 subjects (906 schizophrenics and 1120 controls). After linkage disequilibrium analysis, 23 single nucleotide polymorphisms (SNPs) were genotyped using 5′-exonuclease allelic discrimination assay. We found a significant association of two SNPs (rs11216573; genotypic P value: 0.022 and rs555577; genotypic P value: 0.026, allelic P value: 0.011, uncorrected). Nominal P values did not survive correction for multiple testing (rs11216573; genotypic P value: 0.47 and rs555577; genotypic P value: 0.55, allelic P value: 0.24, after SNPSpD correction). No association was observed between schizophrenia patients and controls in allelic, genotypic and haplotypic analyses. Our findings suggest that FXYD6 is unlikely to be related to the development of schizophrenia in a Japanese population. © 2008 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/j.neulet.2008.04.010

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

Systematic linkage disequilibrium (LD) mapping of 8p12-21 in the Icelandic population identified neuregulin 1 (NRG1) as a prime candidate gene for schizophrenia. However, results of replication studies have been inconsistent, and no large sample analyses have been reported. Therefore, we designed this study with the aim of assessing this putative association between schizophrenia and NRG1 (especially HAPICE region and exon region) using a gene-based association approach in the Japanese population. This study was a two-stage association analysis with a different panel of samples, in which the significant association found in the first-set screening samples (1126 cases and 1022 controls) was further assessed in the confirmation samples (1262 cases and 1172 controls, and 166 trio samples). In the first-set scan, 60 SNPs (49 tagging SNPs from HapMap database, four SNPs from other papers, and seven SNPs detected in the mutation scan) were examined. One haplotype showed a significant association in the first-set screening samples (Global P-value = 0.0244, uncorrected). However, we could not replicate this association in the following independent confirmation samples. Moreover, we could not find sufficient evidence for association of the haplotype identified as being significant in the first-set samples by imputing ungenotyped SNPs from HapMap database. These results indicate that the positionally and functionally attractive regions of NRG1 are unlikely to contribute to susceptibility to schizophrenia in the Japanese population. Moreover, the nature of our results support that two-stage analysis with large sample size is appropriate to examine the susceptibility genes for common diseases. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.schres.2008.01.010

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記述言語：英語  

DOI： 10.1097/WNR.0b013e3282f600b4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Schizophrenia Research  

Several lines of evidence, including genome-wide linkage scans and postmortem brain studies of patients with schizophrenia or bipolar disorder, have suggested that DARPP-32 (dopamine- and cAMP-regulated phosphoprotein, 32 kDa), a key regulatory molecule in the dopaminergic signaling pathway, is involved in these disorders. After evaluating the linkage disequilibrium pattern of the gene encoding DARPP-32 (PPP1R1B; located on 17q12), we conducted association analyses of this gene with schizophrenia and bipolar disorder. Single-marker and haplotypic analyses of four single nucleotide polymorphisms (SNPs; rs879606, rs12601930, rs907094, and rs3764352) in a sample set (subjects with schizophrenia = 384, subjects with bipolar disorder = 318, control subjects = 384) showed that PPP1R1B polymorphisms were not significantly associated with schizophrenia, whereas, even after Bonferroni corrections, significant associations with bipolar disorder were observed for rs12601930 (corrected genotypic p = 0.00059) and rs907094 (corrected allelic p = 0.040). We, however, could not confirm these results in a second independent sample set (subjects with bipolar disorder = 366, control subjects = 370). We now believe that the significant association observed with the first sample set was a result of copy number aberrations in the region surrounding these SNPs. Our findings suggest that PPP1R1B SNPs are unlikely to be related to the development of schizophrenia and bipolar disorder in the Japanese population. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.schres.2007.10.028

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