記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：日本神経治療学会  

DOI： 10.15082/jsnt.40.5_712

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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：Annals of Clinical and Translational Neurology  

Objective: Patients with spinal and bulbar muscular atrophy (SBMA) often experience muscular weakness under cold exposure. Methods: In our previously conducted observational study, we assessed nerve conduction and grip strength to examine the effect of cold exposure on motor function, based on which we conducted a randomized controlled trial to evaluate the efficacy and safety of mexiletine hydrochloride in SBMA (MEXPRESS). Results: In the observational study, 51 consecutive patients with SBMA and 18 healthy controls (HCs) were enrolled. Of the patients with SBMA, 88.0% experienced cold paresis. Patients with SBMA exhibited greater prolongation of ulnar nerve distal latency under cold (SBMA, 5.6 ± 1.1 msec; HC, 4.3 ± 0.6 msec; p <0.001); the change in the distal latencies between room temperature and cold exposure conditions correlated with the change in grip power. In the MEXPRESS trial, 20 participants took mexiletine or lactose, three times a day for 4 weeks with a crossover design. There was no difference in distal latencies at room temperature and under cold exposure between mexiletine and placebo groups as the primary endpoint. However, tongue pressure and 10-sec grip and release test under cold exposure were improved in the mexiletine group. There were no serious adverse events throughout the study period. Interpretation: Cold paresis is common and associated with prolongation of distal latency in SBMA. The results of the phase II clinical trial revealed that mexiletine showed short-term safety, but it did not restore cold exposure-induced prolongation of distal latency.

DOI： 10.1002/acn3.51667

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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 develop a functional measurement that combines quantitative motor evaluation index of various body regions in patients with spinal and bulbar muscular atrophy (SBMA). We assessed subjects with SBMA and healthy controls with quantitative muscle strength measurements and functional scales. We selected tongue pressure, grip power, % peak expiratory flow (%PEF), timed walking test, and % forced vital capacity (%FVC) as components. By combining these values with Z-score, we created a functional composite (SBMA functional composite: SBMAFC). We also calculated the standardized response mean to compare the sensitivity of SBMAFC with that of existing measurements. A total of 97 genetically confirmed patients with SBMA and 36 age- and sex-matched healthy controls were enrolled. In the longitudinal analysis, the standardized response mean of SBMAFC was larger than that of existing rating scales. Receiver operating characteristic (ROC) analysis demonstrated that the SBMAFC is capable of distinguishing between subjects with early-stage SBMA and healthy controls. SBMAFC is more sensitive to disease progression than existing functional rating scales and is a potential outcome measure in clinical trials of SBMA.

DOI： 10.1038/s41598-022-22322-w

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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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：Neurology  

Background and ObjectivesTo assess the clinical and electrophysiologic features of female carriers and early-stage male patients with spinal and bulbar muscular atrophy (SBMA) to elucidate the early pathophysiologic changes of the disease.MethodsFemale carriers, early-stage male patients with SBMA, and age-matched male and female healthy controls were recruited. The results of motor functional scales, motor unit number estimation, dual-energy X-ray absorptiometry, and peripheral blood tests were compared between female carriers and healthy female controls and between patients with SBMA and healthy male controls. EMG was also investigated in female carriers.ResultsWe enrolled 21 female carriers and 11 early-stage male patients. Seventeen female and 14 male age-matched healthy controls were also enrolled. Female carriers experienced early-stage symptoms such as muscle cramps more frequently than healthy female controls. Decreased motor unit number estimation and EMG abnormalities including high amplitude or polyphasic potentials were observed in female carriers together with mild muscle weakness in neck flexion and a slow walking speed. Changes of muscle-related markers, including serum creatine kinase and dual-energy X-ray absorptiometry, were clearly detected in early-stage male patients with SBMA, but not in female carriers.DiscussionThe present study revealed that female carriers of SBMA manifest mild muscular weakness associated with changes in neurogenic biomarkers. Conversely, male patients showed neurogenic and myopathic changes even at the early stage. These results suggest a testosterone-independent neurodegenerative pathophysiology in female SBMA carriers.

DOI： 10.1212/WNL.0000000000201342

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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：Dysphagia  

This study evaluated the safety of laryngeal closure and post-surgical changes in swallowing function of patients with amyotrophic lateral sclerosis (ALS) and proposed an appropriate surgical strategy for patients with ALS. Clinical and surgical data of 26 consecutive patients with ALS who underwent laryngeal closure at Nagoya University Hospital in Japan between 2003 and 2020 were retrospectively analyzed. Changes in swallowing functions were evaluated before and approximately 1 month post-surgery using Neuromuscular Disease Swallowing Status Scale (NdSSS), and Functional Oral Intake Scale (FOIS). The median operation time was 126 min (range, 51–163 min), and the median intraoperative blood loss was 20 mL (range, 0–88 mL). Among the 26 ALS patients who underwent laryngeal closure, grade 1 (mild) complications occurred in three patients (12%); however, no severe complications were observed. After surgery, 25 patients (96%) maintained the swallowing function and only one patient (4%) had deteriorating NdSSS and FOIS scores. No patients were referred to our hospital due to severe aspiration pneumonia after the surgery. Two patients did not require a feeding tube after the surgery and returned to oral intake. Laryngeal closure may be a safe surgical procedure for preventing chronic aspiration and may also maintain swallowing function of patients with ALS. Further multicenter prospective studies using the gold standard videofluoroscopic swallowing examination are required to support our findings.

DOI： 10.1007/s00455-022-10454-0

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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：European Journal of Neurology  

Background and purpose:: The aim was to investigate the association between serum asymmetric dimethylarginine (ADMA) levels and the progression and prognosis of amyotrophic lateral sclerosis (ALS), and to compare cerebrospinal fluid (CSF) and serum ADMA levels with other biomarkers of ALS. Methods: Serum ADMA levels of sporadic ALS patients (n = 68), disease control patients (n = 54) and healthy controls (n = 20) were measured using liquid chromatography tandem mass spectrometry. Correlations of the ADMA level and other markers (nitric oxide and neurofilament light chain levels) were analyzed. Changes in the ALS Functional Rating Scale Revised (ALSFRS-R) score from the onset of disease (ALSFRS-R pre-slope) was used to assess disease progression. Survival was evaluated using the Cox proportional hazards model and Kaplan–Meier analysis. Results: The serum ADMA level was substantially higher in patients with ALS than in healthy controls and disease controls. Serum ADMA level correlated with CSF ADMA level (r = 0.591, p < 0.0001) and was independently associated with the ALSFRS-R pre-slope (r = 0.505, p < 0.0001). Patients with higher serum ADMA levels had less favorable prognoses. CSF ADMA level significantly correlated with CSF neurofilament light chain level (r = 0.456, p = 0.0002) but not with nitric oxide level (r = 0.194, p = 0.219). Conclusion: Serum ADMA level is an independent biomarker of ALS disease progression and prognosis and reflects the degree of motor neuron degeneration.

DOI： 10.1111/ene.15254

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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：Annals of Clinical and Translational Neurology  

Objective: To quantitatively evaluate upper limb ataxia using a novel pen-like sensor device in patients with spinocerebellar ataxia (SCA) and to assess its validity, reliability, and sensitivity to disease progression. Methods: We designed a cross-sectional and longitudinal study of patients with SCA and healthy controls. Upper limb ataxia was evaluated using a device that measures the three-dimensional position every 10 msec. Participants were instructed to move a pen-like part of the device iteratively between two buttons. We evaluated the time, length, velocity, and variation coefficient of the stroke, and calculated the distortion index using the mean squared error. The following scales were also evaluated: Scale for the Assessment and Rating of Ataxia (SARA), the International Cooperative Ataxia Rating Scale (ICARS), and the nine-hole pegboard test. Subjects were followed 12 months after the baseline evaluation. Results: A total of 42 patients with SCA and 33 healthy controls were enrolled and evaluated. For all ataxia indices measured using the device there were significant differences between healthy controls and patients with SCA. Among the ataxia indices, the distortion index showed the strongest correlation with the SARA and ICARS upper limb score (Pearson's r = 0.647 and 0.722, respectively). Test–retest reliability was high for most of the ataxia indices. In the longitudinal analysis, the distortion index showed high standardized response mean and adjusted effect size, regardless of disease severity. Interpretation: Our study demonstrated that the distortion index is a reliable functional marker that is sensitive to longitudinal change in patients with SCA.

DOI： 10.1002/acn3.51528

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記述言語：日本語   出版者・発行元：日本神経治療学会  

DOI： 10.15082/jsnt.39.5_778

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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：Neurobiology of Aging  

DNAJC7 has recently been identified as an amyotrophic lateral sclerosis (ALS) gene via large-scale exome analysis, and its involvement in ALS is still unclear in various populations. This study aimed to determine the frequencies and characteristics of the DNAJC7 variants in a Japanese ALS cohort. A total of 807 unrelated Japanese patients with sporadic ALS were screened via exome analysis. In total, we detected six rare missense variants and one splice-site variant of the DNAJC7 gene, which are not reported in the Japanese public database. Furthermore, the missense variants are located around the TPR domain, which is important for the function of DNAJC7. The total frequency of the DNAJC7 variants in Japanese ALS patients was estimated at 0.87%. Collectively, these results suggest that variants of DNAJC7 are rare cause of Japanese patients with sporadic ALS.

DOI： 10.1016/j.neurobiolaging.2021.12.002

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記述言語：日本語   出版者・発行元：(一社)日本神経治療学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経治療学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経治療学会  

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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：Journal of Neurology Neurosurgery and Psychiatry  

Objective We aimed to investigate the validity of urinary N-terminal titin fragment as a biomarker for amyotrophic lateral sclerosis (ALS). Methods We consecutively enrolled patients with ALS (n=70) and healthy controls (HC) (n=43). We assessed the urinary titin N-terminal fragment, urinary neurotrophin receptor p75 extracellular domain, serum neurofilament light chain (NfL), motor functional measurements and prognosis. We used urinary creatinine (Cr) levels to normalise the urinary levels of titin fragment. Results Compared with HC, patients with ALS had significantly increased urinary levels of titin N-terminal fragment normalised with Cr (titin/Cr) (ALS, 27.2 pmol/mg/dL; HC, 5.8 pmol/mg/dL; p<0.001), which were correlated with the scores of the Revised Amyotrophic Lateral Sclerosis Functional Rating Scale (r=-0.422, p<0.001). A Cox proportional hazards model demonstrated that the high urinary level of titin/Cr was a survival predictor in patients with ALS. Multivariate analysis of prognostic factors showed that the urinary titin/Cr and serum NfL were independent factors for poor prognosis. Conclusions Our findings indicate that urinary N-terminal titin fragment is a non-invasive measure of muscle damage in ALS, which could be applied in disease monitoring and prediction of disease progression, in combination with serum NfL.

DOI： 10.1136/jnnp-2020-324615

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記述言語：日本語   出版者・発行元：日本神経治療学会  

DOI： 10.15082/jsnt.38.5_728

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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：Epilepsy Research  

We report on familial 5 epilepsy patients with autosomal dominant inheritance of a novel heterozygous NUS1 frameshift mutation. All patients had cerebellar ataxia and tremor. Three patients were diagnosed with childhood absence epilepsy, 1 patient with generalized epilepsy, and 1 patient with parkinsonism without epilepsy. Our cases and previously reported cases with deletions of chromosome 6q22 that include NUS1 share these common symptoms. In a cellular experiment, NUS1 mutation led to a substantial reduction of the protein level of NUS1. NUS1 mutation could contribute to epilepsy pathogenesis and also constitute a distinct syndromic entity with cerebellar ataxia and tremor.

DOI： 10.1016/j.eplepsyres.2020.106371

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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 the Neurological Sciences  

Spinal and bulbar muscular atrophy (SBMA) is a hereditary neuromuscular disease affecting only males characterized by progressive muscular atrophy and weakness in bulbar and limb muscles. The present study aimed to evaluate the features of velopharyngeal dysfunction (VPD) in SBMA subjects by an acoustic analysis of speech. Twenty-three genetically confirmed patients with SBMA were enrolled and assessed their speech by measuring the nasalance score with a Nasometer II. The nasalance scores of the SBMA group was higher than that of healthy controls (p = .035) and significantly correlated with the total score of the revised amyotrophic lateral sclerosis functional rating scale (rs = −0.520, p = .011). On the basis of the results of the VPD study, the efficacy of a palatal lift prosthesis (PLP) was assessed in two patients with SBMA to treat their VPD. The PLP improved dysarthria in both cases, although the impact of the prosthesis on dysphagia was not consistent. The present study suggested that the nasalance score is a useful quantitative measurement to evaluate VPD in patients with SBMA. A PLP may improve dysarthria in SBMA patients by reducing VPD, but the clinical application of this procedure should be considered carefully in view of its possible negative effect on dysphagia.

DOI： 10.1016/j.jns.2019.116503

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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 Neurology  

Objective: To assess the changes of muscle-related biomarkers at the early stage of amyotrophic lateral sclerosis, and to confirm these findings in an experimental animal model. Methods: Thirty-nine subjects with sporadic amyotrophic lateral sclerosis and 20 healthy controls were enrolled and longitudinally evaluated. We evaluated serum creatine kinase and creatinine levels and appendicular lean soft-tissue mass using dual X-ray absorptiometry. The levels of biomarkers at early ALS stages were estimated using linear mixed models with unstructured correlation and random intercepts. We also analyzed the longitudinal changes of serum creatine kinase and creatinine, together with the mRNA levels of acetylcholine receptor subunit γ (Chrng) and muscle-associated receptor tyrosine kinase, markers of denervation, in the gastrocnemius muscle of superoxide dismutase 1 (SOD1)^G93A transgenic mice, an animal model of amyotrophic lateral sclerosis. Results: The estimated levels of creatine kinase were higher in subjects with amyotrophic lateral sclerosis at the early stage than in healthy controls, although the estimated appendicular lean soft-tissue mass and creatinine levels were equivalent between both groups, suggesting that the elevation of creatine kinase precedes both muscular atrophy and subjective motor symptoms in sporadic amyotrophic lateral sclerosis. In SOD1^G93A mice, the serum levels of creatine kinase were elevated at 9 weeks of age (peri-onset) when Chrng started to be up-regulated, and were then down-regulated at 15 weeks of age, consistent with the clinical data from patients with sporadic amyotrophic lateral sclerosis. Interpretation: Creatine kinase elevation precedes muscular atrophy and reflects muscle denervation at the early stage.

DOI： 10.1007/s00415-019-09507-6

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本てんかん学会  

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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：一般社団法人 日本内科学会  

Spinal and bulbar muscular atrophy (SBMA) is a progressive hereditary neuromuscular disease caused by the testosterone-dependent accumulation of pathogenic polyglutamine-expanded androgen receptor protein. A 41-year-old man with SBMA received the androgen deprivation agent leuprorelin acetate for 7 years in clinical trials and underwent castration following the trial. Suppression of testosterone levels for 14 years resulted in a slower disease progression, as measured prospectively with quantitative measurements, than the historical control data reported in previous studies. This suggests that long-term androgen deprivation delays disease progression in SBMA.

DOI： 10.2169/internalmedicine.1592-18

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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記述言語：英語   出版者・発行元：(一社)日本神経学会  

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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：BMJ Open  

Introduction: Spinal and bulbar muscular atrophy (SBMA) is a slowly progressive neuromuscular disease. Cold exposure often leads to worsening of motor symptoms including paresis. Although mexiletine hydrochloride administration has been shown to be effective for the treatment of several muscular diseases, its effectiveness in SBMA has not been validated to date. The trial will test it as a symptomatic drug for cold paresis. This study is the first trial to evaluate the efficacy and safety of mexiletine hydrochloride administration in patients with SBMA. Methods and analysis: A placebo-controlled, randomised, double-blind, multicentre, crossover clinical trial will be conducted to assess the safety and efficacy of mexiletine hydrochloride in patients with SBMA. The eligible patients will be assigned randomly in a 1:1 ratio to two groups in a double-blind manner. Participants will take mexiletine hydrochloride (300 mg/day) or a placebo orally three times a day for 4 weeks (period 1). After a 1-week washout period, participants will take the other drug for 4 weeks (period 2). The primary endpoint is the difference in distal latencies between room temperature and cold exposure conditions. Ethics and dissemination: This study will be conducted in compliance with the Helsinki Declaration and the Ethical Guidelines for Medical and Health Research Involving Human Subjects by the Japanese government and has been approved by the ethics committee of Nagoya University Graduate School of Medicine, as a central institutional review board, and by each facility. The results will be disseminated in peer-reviewed journals and at scientific conferences. Trial registration number: UMIN000026150; Pre-results.

DOI： 10.1136/bmjopen-2018-023041

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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：Neurology  

Objective To identify a candidate biomarker reflecting biological changes during the preclinical progression of spinal and bulbar muscular atrophy (SBMA). Methods We analyzed longitudinal changes in biochemical parameters obtained during health examinations before and after the diagnosis of SBMA. We estimated trajectories of clinical markers across years from the onset of weakness using linear mixed models and compared these trajectories with those estimated for male healthy controls and patients with amyotrophic lateral sclerosis (ALS) and Parkinson disease (PD). Moreover, we examined the relationship between serum creatinine level and the onset of symptoms using Kaplan-Meier curves. Results Between October 2014 andOctober 2017, we enrolled 40 patients with genetically confirmed SBMA, 48 healthy controls, 25 patients with ALS, and 20 patients with PD. In patients with SBMA, we evaluated the patients' data for a period of 17.3 ± 7.5 years, including 11.4 ± 7.1 years of preclinical phase. Decreases in serum creatinine occurred >10 years before the onset. The mean serum creatinine concentration was 0.56 mg/dL at the onset of weakness in patients with SBMA compared to 0.88 ± 0.10 mg/dL on final evaluation in healthy controls. Serum levels of alanine transaminase and aspartate transaminase showed tendencies to increase in preclinical SBMA. These preclinical changes of biomarkers were not observed in either ALS or PD. Conclusions Our findings suggest that serum creatinine begins to decrease before the onset of clinical symptoms and is a biomarker for disease progression and the efficacy of therapeutics in preclinical SBMA.

DOI： 10.1212/WNL.0000000000005360

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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：Jmir Research Protocols  

Background: Although spinal and bulbar muscular atrophy (SBMA) has been classified as a motor neuron disease, several reports have indicated the primary involvement of skeletal muscle in the pathogenesis of this devastating disease. Recent studies reported decreased intramuscular creatine levels in skeletal muscles in both patients with SBMA and transgenic mouse models of SBMA, which appears to contribute to muscle weakness. Objective: The present study aimed to examine the efficacy and safety of oral creatine supplementation to improve motor function in patients with SBMA. Methods: A randomized, double-blind, placebo-controlled, three-armed clinical trial was conducted to assess the safety and efficacy of creatine therapy in patients with SBMA. Patients with SBMA eligible for this study were assigned randomly in a 1:1:1 ratio to each group of placebo, 10 g, or 15 g daily dose of creatine monohydrate in a double-blind fashion. Participants took creatine or placebo orally 3 times a day for 8 weeks. Outcome measurements were results of neurological assessments, examinations, and questionnaires collected at baseline and at weeks 4, 8, and 16 after a washout period. The primary endpoint was the change in handgrip strength values from baseline to week 8. The secondary endpoints included the following: results of maximum voluntary isometric contraction tests of extremities; tongue pressure; results of the 15-foot timed walk test and the rise from bed test; modified quantitative myasthenia gravis score; respiratory function test results; activities of daily living assessed with the Revised Amyotrophic Lateral Sclerosis Functional Rating Scale and the Spinal and Bulbar Muscular Atrophy Functional Rating Scale; skeletal muscle mass measured with dual-energy X-ray absorptiometry; urinary 8-hydroxydeoxyguanosine levels; and questionnaires examining the quality of life, swallowing function, and fatigue. Results: Participant enrollment in the trial started from June 2014 and follow-up was completed in July 2015. The study is currently being analyzed. Conclusions: This is the first clinical trial evaluating creatine therapy in SBMA. Given that creatine serves as an energy source in skeletal muscles, recovery of intramuscular creatine concentration is expected to improve muscle strength.

DOI： 10.2196/resprot.8655

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記述言語：英語  

DOI： 10.1016/j.jns.2017.08.3512

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経治療学会  

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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：日本神経学会  

<p>症例は65歳の女性である．再発性の小リンパ球性リンパ腫に対し，半年間rituximab等が投与され，めまいと小脳性運動失調が発症した．頭部MRIで両側中小脳脚病変を認め，進行性多巣性白質脳症（progressive multifocal leukoencephalopathy; PML）を疑い，髄液中JC virus（JCV）-DNA PCR検査を数回施行し，4回目に初めてJCV-DNAが検出され，診断が確定した．小脳萎縮を認め，granule cell neuronopathyの合併が示唆された．Mirtazapineとmefloquineの併用治療により長期生存が得られた．PMLでは両側中小脳脚の病変で発症する例がある．また，病初期には髄液検査でJCV-DNAが陰性のことがあり，繰り返し検査する必要がある．</p>

DOI： 10.5692/clinicalneurol.cn-000873

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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記述言語：日本語   出版者・発行元：(一社)日本神経学会  

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