記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：責任著者   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）  

担当区分：筆頭著者   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）  

担当区分：筆頭著者   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：iScience  

Although chronic kidney disease (CKD) is a major health problem worldwide, its underlining mechanism is incompletely understood. We previously identified adipolin as an adipokine which provides benefits for cardiometabolic diseases. Here, we investigated the role of adipolin in the development of CKD. Adipolin-deficiency exacerbated urinary albumin excretion, tubulointerstitial fibrosis and oxidative stress of remnant kidneys in mice after subtotal nephrectomy through inflammasome activation. Adipolin positively regulated the production of ketone body, β-hydroxybutyrate (BHB) and expression of a catalytic enzyme producing BHB, HMGCS2 in the remnant kidney. Treatment of proximal tubular cells with adipolin attenuated inflammasome activation through the PPARα/HMGCS2-dependent pathway. Furthermore, systemic administration of adipolin to wild-type mice with subtotal nephrectomy ameliorated renal injury, and these protective effects of adipolin were diminished in PPARα-deficient mice. Thus, adipolin protects against renal injury by reducing renal inflammasome activation through its ability to induce HMGCS2-dependent ketone body production via PPARα activation.

DOI： 10.1016/j.isci.2023.106591

Scopus

PubMed

DOI： 10.1159/000527385

Web of Science

記述言語：英語   出版者・発行元：一般社団法人 日本循環器学会  

DOI： 10.1253/circj.CJ-22-0343

PubMed

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

Aims: Abdominal aortic aneurysm (AAA) is an increasing and life-threatening disease. Obesity contributes to an increased risk of AAA. Omentin is a circulating adipokine, which is downregulated in obese complications. Here, we examined whether omentin could modulate angiotensin (Ang) II-induced AAA formation in apolipoprotein E-knockout (apoE-KO) mice. Methods and results: apoE-KO mice were crossed with transgenic mice expressing the human omentin gene in fat tissue (OMT-Tg mice) to generate apoE-KO/OMT-Tg mice. apoE-KO/OMT-Tg and apoE-KO mice were subjected to continuous Ang II infusion by using osmotic mini pumps. apoE-KO/OMT-Tg mice exhibited a lower incidence of AAA formation and a reduced maximal diameter of AAA compared with apoE-KO mice. apoE-KO/OMT-Tg mice showed attenuated disruption of medial elastic fibres in response to Ang II compared with apoE-KO mice. apoE-KO/OMT-Tg mice also displayed reduced expression levels of matrix metalloproteinase (MMP) 9, MMP2, and pro-inflammatory genes in aortic walls compared with apoE-KO mice. Furthermore, systemic administration of omentin also attenuated AAA formation and disruption of medial elastic fibres in response to Ang II in apoE-KO mice. Treatment of human monocyte-derived macrophages with omentin protein attenuated expression of MMP9 and pro-inflammatory mediators, and MMP9 activation after stimulation with lipopolysaccharide. Treatment of human vascular smooth muscle cells (VSMCs) with omentin protein reduced expression and activation of MMP2 after stimulation with tumour necrosis factor α. Omentin treatment increased phosphorylation levels of Akt in human macrophages and VSMCs. The suppressive effects of omentin on MMP9 and MMP2 expression were reversed by inhibition of integrin-αVβ3/PI3-kinase/Akt signalling in macrophages and VSMCs, respectively. Conclusion: These data suggest that omentin acts as an adipokine that can attenuate Ang II-induced development of AAA through suppression of MMP9 and MMP2 expression and inflammatory response in the vascular wall.

DOI： 10.1093/cvr/cvab179

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：ESC Heart Failure  

Aims: Autotaxin (ATX) promotes myocardial inflammation, fibrosis, and the subsequent cardiac remodelling through lysophosphatidic acid production. However, the prognostic impact of serum ATX in non-ischaemic dilated cardiomyopathy (NIDCM) has not been clarified. We investigated the prognostic impact of serum ATX in patients with NIDCM. Methods and results: We enrolled 104 patients with NIDCM (49.8 ± 13.4 years, 76 men). We divided the patients into two groups using different cutoffs of median serum ATX levels for men and women: high-ATX group and low-ATX group. Cardiac events were defined as a composite of cardiac death and heart failure resulting in hospitalization. Median ATX level was 203.5 ng/mL for men and 257.0 ng/mL for women. Brain natriuretic peptide levels [224.0 (59.6–689.5) pg/mL vs. 96.5 (40.8–191.5) pg/mL, P = 0.010] were higher in the high-ATX group than low-ATX group, whereas high-sensitivity C-reactive protein and collagen volume fraction levels in endomyocardial biopsy samples were not significantly different between the two groups. Kaplan–Meier survival analysis revealed that the event-free survival rate was significantly lower in the high-ATX group than low-ATX group (log-rank; P = 0.007). Cox proportional hazard analysis revealed that high-ATX was an independent determinant of composite cardiac events. In both sexes, serum ATX levels did not correlate with high-sensitivity C-reactive protein levels and collagen volume fraction but had a weak correlation with brain natriuretic peptide levels (men; spearman's rank: 0.274, P = 0.017, women; spearman's rank: 0.378, P = 0.048). Conclusion: High serum ATX levels can be associated with increasing adverse clinical outcomes in patients with NIDCM. These results indicate serum ATX may be a novel biomarker or therapeutic target in NIDCM.

DOI： 10.1002/ehf2.13817

Web of Science

Scopus

PubMed

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

Chronic kidney disease (CKD) is an increasing and life-threatening disease worldwide. Recent evidence indicates that blood coagulation factors promote renal dysfunction in CKD patients. Activated factor X (FXa) inhibitors are safe and first-line drugs for the prevention of thrombosis in patients with atrial fibrillation. Here, we investigated the therapeutic effects of edoxaban on CKD using the mouse 5/6 nephrectomy model. Eight-week-old wild-type mice were subjected to 5/6 nephrectomy surgery and randomly assigned to two groups, edoxaban or vehicle admixture diet. Edoxaban treatment led to reduction of urinary albumin excretion and plasma UN levels compared with vehicle group, which was accompanied with reduced glomerular cross-sectional area and cell number. Edoxaban treatment also attenuated fibrinogen positive area in the remnant kidneys after subtotal nephrectomy. Moreover, edoxaban treatment resulted in attenuated tubulointerstitial fibrosis after 5/6 nephrectomy, which was accompanied by reduced expression levels of epithelial-mesenchymal transition (EMT) markers, inflammatory mediators, and oxidative stress markers in the remnant kidneys. Treatment of cultured proximal tubular cells, HK-2 cells, with FXa protein led to increased expression levels of EMT markers, inflammatory mediators, and oxidative stress markers, which were abolished by pretreatment with edoxaban. Treatment of HK-2 cells with edoxaban attenuated FXa-stimulated phosphorylation levels of extracellular signal-regulated kinase (ERK) and NF-κB. Our findings indicate that edoxaban can improve renal injury after subtotal nephrectomy by reducing EMT and inflammatory response, suggesting that FXa inhibition could be a novel therapeutic target for CKD patients with atrial fibrillation.

DOI： 10.14814/phy2.15218

Web of Science

Scopus

PubMed

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

Skeletal muscle atrophy caused by various conditions including aging, nerve damage, and steroid administration, is a serious health problem worldwide. We recently reported that neuron-derived neurotrophic factor (NDNF) functions as a muscle-derived secreted factor, also known as myokine, which exerts protective actions on endothelial cell and cardiomyocyte function. Here, we investigated whether NDNF regulates skeletal muscle atrophy induced by steroid administration and sciatic denervation. NDNF-knockout (KO) mice and age-matched wild-type (WT) mice were subjected to continuous dexamethasone (DEX) treatment or sciatic denervation. NDNF-KO mice exhibited decreased gastrocnemius muscle weight and reduced cross sectional area of myocyte fiber after DEX treatment or sciatic denervation compared with WT mice. Administration of an adenoviral vector expressing NDNF (Ad-NDNF) or recombinant NDNF protein to gastrocnemius muscle of WT mice increased gastrocnemius muscle weight after DEX treatment. NDNF-KO mice showed increased expression of ubiquitin E3-ligases, including atrogin-1 and MuRF-1, in gastrocnemius muscle after DEX treatment, whereas Ad-NDNF reduced expression of atrogin-1 and MuRF-1 in gastrocnemius muscle of WT mice after DEX treatment. Pretreatment of cultured C2C12 myocytes with NDNF protein reversed reduced myotube diameter and increased expression of atrogin-1 and MuRF-1 after DEX stimulation. Treatment of C2C12 myocytes increased Akt phosphorylation. Pretreatment of C2C12 myotubes with the PI3-kinase/Akt inhibitor reversed NDNF-induced increase in myotube fiber diameter after DEX treatment. In conclusion, our findings indicated that NDNF prevents skeletal muscle atrophy in vivo and in vitro through reduction of ubiquitin E3-ligases expression, suggesting that NDNF could be a novel therapeutic target of muscle atrophy.

DOI： 10.1016/j.bbrc.2022.01.028

Web of Science

Scopus

PubMed

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 Cardiology  

Background: Follistatin-like 1 (FSTL1) is a myocyte-secreted glycoprotein that could play a role in myocardial maintenance in response to harmful stimuli. We investigated the association between serum FSTL1 levels, especially focused on transcardiac gradient and the hemodynamics, to explore the prognostic impact of FSTL1 levels in patients with dilated cardiomyopathy (DCM). Methods: Thirty-two ambulatory patients with DCM (23 men; mean age 59 years) were prospectively enrolled. Blood samples were simultaneously collected from the aortic root (Ao), coronary sinus (CS), as well as from the peripheral vein during cardiac catheterization in stable conditions. The transcardiac gradient of FSTL1 was calculated by the difference between serum FSTL1 levels of CS and Ao (FSTL1CS-Ao). Patients were divided into two groups based on the median of FSTL1CS-Ao: Low FSTL1CS-Ao group, <0 ng/mL; High FSTL1CS-Ao group, ≥0 ng/mL. Cardiac events were defined as a composite of cardiac deaths and hospitalizations for worsening heart failure. Results: Mean left ventricular ejection fraction and median plasma B-type natriuretic peptide levels were 30.9% and 92.3 pg/mL, respectively. FSTL1CS-Ao was negatively correlated with pulmonary capillary wedge pressure (r = -0.400, p = 0.023). Kaplan-Meier survival analysis showed that event-free survival rate was significantly lower in the Low FSTL1CS-Ao group than in the High FSTL1CS-Ao group (p = 0.013). Cox regression analyses revealed that the transcardiac gradient of FSTL1 was an independent predictor for cardiac events. Receiver operating characteristic curve analysis showed that the cut-off value of FSTL1CS-Ao for the prediction of cardiac events was -4.09 ng/mL with sensitivity of 82% and specificity of 86% (area under the curve, 0.87). Conclusions: Fifty percent of patients had negative transcardiac gradient of FSTL1. Reduced transcardiac gradient of FSTL1 might be a novel prognostic predictor in DCM patients with impaired hemodynamics.

DOI： 10.1016/j.jjcc.2021.07.005

Web of Science

Scopus

PubMed

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

Web of Science

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 American Heart Association  

BACKGROUND: Circadian rhythm disorders, often seen in modern lifestyles, are a major social health concern. The aim of this study was to examine whether circadian rhythm disorders would influence angiogenesis and blood perfusion recovery in a mouse model of hind limb ischemia. METHODS AND RESULTS: A jet-lag model was established in C57BL/6J mice using a light-controlled isolation box. Control mice were kept at a light/dark 12:12 (12-hour light and 12-hour dark) condition. Concentrations of plasma vascular endothelial growth factor and circulating endothelial progenitor cells in control mice formed a circadian rhythm, which was diminished in the jet-lag model (P<0.05). The jet-lag condition deteriorated tissue capillary formation (P<0.001) and tissue blood perfusion recovery (P<0.01) in hind limb ischemia, which was associated with downregulation of vascular endothelial growth factor expression in local ischemic tissue and in the plasma. Although the expression of clock genes (ie, Clock, Bmal1, and Cry) in local tissues was upregulated after ischemic injury, the expression levels of cryptochrome (Cry) 1 and Cry2 were inhibited by the jet-lag condition. Next, Cry1 and Cry2 double-knockout mice were examined for blood perfusion recoveries and a reparative angiogenesis. Cry1 and Cry2 double-knockout mice revealed suppressed capillary density (P<0.001) and suppressed tissue blood perfusion recovery (P<0.05) in the hind limb ischemia model. Moreover, knockdown of CRY1/2 in human umbilical vein endothelial cells was accompanied by increased expression of WEE1 and decreased expression of HOXC5. This was associated with decreased proliferative capacity, migration ability, and tube formation ability of human umbilical vein endothelial cells, respectively, leading to impairment of angiogenesis. CONCLUSIONS: Our data suggest that circadian rhythm disorder deteriorates reparative ischemia-induced angiogenesis and that maintenance of circadian rhythm plays an important role in angiogenesis.

DOI： 10.1161/JAHA.121.020896

Web of Science

Scopus

PubMed

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  

Adipose-derived regenerative cells (ADRCs), mesenchymal stem/progenitor cells from subcutaneous adipose tissue, have been shown to stimulate angiogenesis in hind limb ischemia, an effect attributed to paracrine action on endothelial cells (ECs) in mice. Despite promising therapeutic effects, the relevant molecules promoting neovascularization in this setting have not been fully elucidated. Extracellular vesicles, crucial mediators of intercellular communication, are recognized as a new therapeutic modality for regenerative medicine. Here, we found that GW4869, an exosome biogenesis inhibitor targeting neutral sphingomyelinase, impaired ADRCs-mediated angiogenesis and improvement of blood perfusion in a murine hind limb ischemia model. In addition, while the supernatant of ADRCs induced murine EC migration, this effect was attenuated by pre-treatment with GW4869. RNA analysis revealed that treatment of ADRCs with GW4869 reduced the expression of microRNA-21 (miR-21), miR-27b, miR-322, and let-7i in ADRCs-derived exosomes. Furthermore, the exosomes derived from GW4869-treated ADRCs induced the expression of the miR-21 targets Smad7 and Pten, and the miR-322 target Cul2, in ECs. These findings suggest that several miRNAs in ADRCs-derived exosomes contribute to angiogenesis and improvement of blood perfusion in a murine hind limb ischemia model.

DOI： 10.18999/nagjms.83.3.465

Web of Science

Scopus

PubMed

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

Mesenchymal stem cells (MSCs) are the likely precursors of multiple lines of mesenchymal cells. The existence of bona fide MSCs with self-renewal capacity and differentiation potential into all mesenchymal lineages, however, has been unclear because of the lack of MSC-specific marker(s) that are not expressed by the terminally differentiated progeny. Meflin, a glycosylphosphatidylinositol-anchored protein, is an MSC marker candidate that is specifically expressed in rare stromal cells in all tissues. Our previous report showed that Meflin expression becomes down-regulated in bone marrow-derived MSCs cultured on plastic, making it difficult to examine the self-renewal and differentiation of Meflin-positive cells at the single-cell level. Here, we traced the lineage of Meflin-positive cells in postnatal and adult mice, showing that those cells differentiated into white and brown adipocytes, osteocytes, chondrocytes and skeletal myocytes. Interestingly, cells derived from Meflin-positive cells formed clusters of differentiated cells, implying the in situ proliferation of Meflin-positive cells or their lineage-committed progenitors. These results, taken together with previous findings that Meflin expression in cultured MSCs was lost upon their multilineage differentiation, suggest that Meflin is a useful potential marker to localize MSCs and/or their immature progenitors in multiple tissues.

DOI： 10.1111/gtc.12855

Web of Science

Scopus

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Arteriosclerosis, Thrombosis, and Vascular Biology  

Objective: Lymphatic vessels are distributed throughout the body and tightly collaborate with blood vessels to maintain tissue homeostasis. However, the functional roles of lymphangiogenesis in the process of reparative angiogenesis in ischemic tissues are largely unknown. Accordingly, we investigated potential roles of lymphangiogenesis using a mouse model of ischemia-induced angiogenesis. Approach and Results: Male C57BL/6J mice were subjected to unilateral hindlimb ischemia, in which not only angiogenesis but also lymphangiogenesis was induced. Next, the excessive and prolonged tissue edema model significantly deteriorated reparative angiogenesis and blood perfusion recovery in ischemic limbs. Finally, implantation of adipose-derived regenerative cells augmented ischemia-induced lymphangiogenesis, which was accompanied by reduced tissue edema and inflammation, resulting in improving reparative angiogenesis and blood perfusion recovery. In addition, inhibition of lymphangiogenesis by MAZ51, a specific VEGFR3 (vascular endothelial cell growth factor receptor 3) inhibitor, resulted in enhanced inflammatory cell infiltration, gene expression of TNF (tumor necrosis factor)-α, IL (interleukin)-1β, IL-6, TGF (transforming growth factor)-β, angiostatin, vasohibin, and endostatin, and tissue edema, resulting in reduced angiogenesis. Conclusions: The lymphatic system may have a clearance role of tissue edema and inflammation, which contribute to functional reparative angiogenesis in response to tissue ischemia. Modulation of lymphangiogenesis would become a novel therapeutic strategy for severe ischemic disease in addition to ordinary vascular intervention and therapeutic angiogenesis.

DOI： 10.1161/ATVBAHA.121.316191

Web of Science

Scopus

PubMed

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1371/journal.pone.0243483

Web of Science

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1371/journal.pone.0235362.

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1093/cvr/cvz074

Web of Science

PubMed

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1161/CIRCRESAHA.119.314806

Web of Science

PubMed

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1253/circj.CJ-18-0428

Web of Science

PubMed

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 Cardiology  

Background Anti-Xa activity (AXA) in patients with nonvalvular atrial fibrillation (NVAF) and relationship to bleeding events remains unclear. Methods We evaluated AXA in 94 patients at both trough and peak rivaroxaban concentrations. Rivaroxaban dosage was determined according to creatinine clearance (CrCl): 10 and 15 mg once daily for patients with CrCl 15–49 and CrCl ≥50 mL/min, respectively. AXA value distribution and its association with bleeding events were examined in enrolled subjects. Results The mean peak AXA level was significantly higher than the mean trough level (1.98 ± 0.81 vs. 0.16 ± 0.15 IU/mL; p < 0.001). The peak AXA level significantly differed among patients with CrCl 15–29, 30–49, 50–79, and ≥80 mL/min (2.51 ± 0.83, 1.72 ± 0.76, 2.05 ± 0.82, and 1.66 ± 0.51 IU/mL, respectively; p = 0.004). Major and non-major clinically relevant bleeding events occurred in 22 patients (23.4% and 14.6% per year, respectively). The mean peak AXA level was significantly higher in patients who experienced bleeding events than in those who did not (2.40 ± 0.70 vs. 1.84 ± 0.80 IU/mL; p = 0.001). A Cox multivariate analysis showed that the peak AXA level was independently related to the incidence of major and non-major clinically relevant bleeding events (p = 0.012). Cumulative bleeding rates were significantly higher in patients with high peak AXA levels (p < 0.001). Conclusion Peak AXA level was an independent predictor for bleeding events in Japanese NVAF patients receiving rivaroxaban.

DOI： 10.1016/j.jjcc.2016.11.013

Web of Science

Scopus

PubMed

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  

Cardiomyocytes are susceptible to apoptosis caused by hypoxia during the acute and subacute phases of myocardial infarction (MI). Angiogenesis can reduce MI-induced damage by mitigating hypoxia. It has been speculated that the ischemic border zone is a unique area rescued by angiogenic therapy. However, the mechanism and timing for new vessel formation in the mammalian heart following hypoxia are unclear. Identifying targets that benefit from angiogenesis treatment is indispensable for the development of revolutionary therapies. Here, we describe a novel circulatory system wherein new vessels develop from the endocardium of the left ventricle to perfuse the hypoxic area and salvage damaged cardiomyocytes at 3-14 days after MI by activating vascular endothelial growth factor signaling. Moreover, enhanced angiogenesis increased cardiomyocyte survival along the endocardium in the ischemic zone and suppressed ventricular remodeling in infarcted hearts. In contrast, cardiomyocytes in the border zone's hypoxic area underwent apoptosis within 12 h of MI, and the border area that was amenable to treatment disappeared. These data indicate that the non-perfused area along the endocardium is a site of active angiogenesis and a promising target for MI treatment.

DOI： 10.1038/s41598-017-07524-x

Web of Science

Scopus

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jjcc.2016.11.013.

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

DOI： 10.1161/CIRCHEARTFAILURE.117.003826

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：日本細胞生物学会  

Protein phosphorylation plays an important role in the physiological regulation of cardiac function. Myocardial contraction and pathogenesis of cardiac diseases have been reported to be associated with adaptive or maladaptive protein phosphorylation; however, phosphorylation signaling in the heart is not fully elucidated. We recently developed a novel kinase-interacting substrate screening (KISS) method for exhaustive screening of protein kinase substrates, using mass spectrometry and affinity chromatography. First, we examined protein phosphorylation by extracellular signal-regulated kinase (ERK) and protein kinase A (PKA), which has been relatively well studied in cardiomyocytes. The KISS method showed that ERK and PKA mediated the phosphorylation of known cardiac-substrates of each kinase such as Rps6ka1 and cTnI, respectively. Using this method, we found about 330 proteins as Rho-kinase-mediated substrates, whose substrate in cardiomyocytes is unknown. Among them, CARP/Ankrd1, a muscle ankyrin repeat protein, was confirmed as a novel Rho-kinasemediated substrate. We also found that non-phosphorylatable form of CARP repressed cardiac hypertrophyrelated gene Myosin light chain-2v (MLC-2v) promoter activity, and decreased cell size of heart derived H9c2 myoblasts more efficiently than wild type-CARP. Thus, focused proteomics enable us to reveal a novel signaling pathway in the heart.

DOI： 10.1247/csf.16011

Scopus

PubMed

CiNii Research

記述言語：英語   出版者・発行元：Circulation Research  

Rationale: Activated cardiac fibroblasts (CF) are crucial players in the cardiac damage response; excess fibrosis, however, may result in myocardial stiffening and heart failure development. Inhibition of activated CF has been suggested as a therapeutic strategy in cardiac disease, but whether this truly improves cardiac function is unclear. Objective: To study the effect of CF ablation on cardiac remodeling. Methods and Results: We characterized subgroups of murine CF by single-cell expression analysis and identified periostin as the marker showing the highest correlation to an activated CF phenotype. We generated bacterial artificial chromosome-transgenic mice allowing tamoxifen-inducible Cre expression in periostin-positive cells as well as their diphtheria toxin-mediated ablation. In the healthy heart, periostin expression was restricted to valvular fibroblasts; ablation of this population did not affect cardiac function. After chronic angiotensin II exposure, ablation of activated CF resulted in significantly reduced cardiac fibrosis and improved cardiac function. After myocardial infarction, ablation of periostin-expressing CF resulted in reduced fibrosis without compromising scar stability, and cardiac function was significantly improved. Single-cell transcriptional analysis revealed reduced CF activation but increased expression of prohypertrophic factors in cardiac macrophages and cardiomyocytes, resulting in localized cardiomyocyte hypertrophy. Conclusions: Modulation of the activated CF population is a promising approach to prevent adverse cardiac remodeling in response to angiotensin II and after myocardial infarction.

DOI： 10.1161/CIRCRESAHA.116.308643

Web of Science

Scopus

PubMed

記述言語：英語  

DOI： 10.1093/cvr/cvv249

PubMed

記述言語：日本語  

Web of Science

記述言語：英語   出版者・発行元：Journal of Molecular and Cellular Cardiology  

Myocardial infarction is a leading cause of death, and cardiac rupture following myocardial infarction leads to extremely poor prognostic feature. A large body of evidence suggests that Akt is involved in several cardiac diseases. We previously reported that Akt-mediated Girdin phosphorylation is essential for angiogenesis and neointima formation. The role of Girdin expression and phosphorylation in myocardial infarction, however, is not understood. Therefore, we employed Girdin-deficient mice and Girdin S1416A knock-in (GirdinSA/SA) mice, replacing the Akt phosphorylation site with alanine, to address this question. We found that Girdin was expressed and phosphorylated in cardiac fibroblasts in vitro and that its phosphorylation was crucial for the proliferation and migration of cardiac fibroblasts. In vivo, Girdin was localized in non-cardiomyocyte interstitial cells and phosphorylated in α-smooth muscle actin-positive cells, which are likely to be cardiac myofibroblasts. In an acute myocardial infarction model, GirdinSA/SA suppressed the accumulation and proliferation of cardiac myofibroblasts in the infarcted area. Furthermore, lower collagen deposition in GirdinSA/SA mice impaired cardiac repair and resulted in increased mortality attributed to cardiac rupture. These findings suggest an important role of Girdin phosphorylation at serine 1416 in cardiac repair after acute myocardial infarction and provide insights into the complex mechanism of cardiac rupture through the Akt/Girdin-mediated regulation of cardiac myofibroblasts.

DOI： 10.1016/j.yjmcc.2015.09.012

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：Heart Rhythm  

Background Dipeptidyl peptidase-4 (DPP-4) inhibitors were recently reported to have cardioprotective effects via amelioration of ventricular function. However, the role of DPP-4 inhibition in atrial remodeling, especially of the arrhythmogenic substrate, remains unclear. Objective We investigated the effects of a DPP-4 inhibitor, alogliptin, on atrial fibrillation (AF) in a rabbit model of heart failure caused by ventricular tachypacing (VTP). Methods Rabbits subjected to VTP at 380 bpm for 1 or 3 weeks, with or without alogliptin treatment, were assessed using echocardiography, electrophysiology, histology, and immunoblotting and compared with nonpaced animals. Results VTP rabbits exhibited increased duration of atrial burst pacing-induced AF, whereas administration of alogliptin shortened this duration by 73%. The extent of atrial fibrosis after VTP was reduced by 39% in the alogliptin-treated group. VTP rabbits treated with alogliptin displayed a 1.6-fold increase in left atrial myocardial capillary density compared with nontreated rabbits. A 2-fold increase in endothelial nitric oxide synthase (eNOS) phosphorylation was observed in the left atrium of alogliptin-treated rabbits compared with nontreated rabbits. Moreover, a nitric oxide synthase inhibitor (Nω-nitro-l-arginine methyl ester) blocked the beneficial effects of alogliptin on AF duration, fibrosis, and capillary density. Conclusion Alogliptin shortened the duration of AF caused by VTP-induced fibrotic atrial tissue by augmenting atrial angiogenesis and activating eNOS. Our findings suggest that DPP-4 inhibitors may be useful in the prevention of heart failure-induced AF.

DOI： 10.1016/j.hrthm.2015.03.010

Scopus

PubMed

記述言語：英語   出版者・発行元：一般社団法人 日本循環器学会  

Background: Until now, there have been few reports on the accuracy of in-stent restenosis (ISR) detection using high-definition computed tomography (HDCT). The purpose of this study was to assess ISR using HDCT with a new gemstone detector and to examine the diagnostic accuracy compared with invasive coronary angiography. Methods and Results: We evaluated 162 consecutive patients with 316 stents and the image quality (IQ) scores used to assess ISR, and analyzed whether stent strut thickness and diameter affected IQ score and assessability. In the 316 stents, 278 were diagnosed as assessable with HDCT (88.0%). IQ score for stent diameter ≥3 mm was significantly higher than that for stent diameter <3 mm, for stents with both thick struts ≥140 μm in thickness (mean IQ: 2.04±0.97 vs. 2.83±1.06, P<0.001) and thin struts <140 μm (mean IQ: 1.92±0.87 vs. 2.64±0.96, P=0.01). Assessability for stent diameter ≥3 mm was significantly higher than that for stent diameter <3 mm only for stents with thick struts (92.8% vs. 76.1%, P<0.001). Stent strut thickness, however, was not statistically significantly associated with either IQ score or assessability. Conclusions: In-stent lumens have high HDCT assessability, and HDCT is useful to evaluate thick-strut stents with diameter <3 mm.

DOI： 10.1253/circj.CJ-14-1344

Web of Science

Scopus

PubMed

CiNii Research

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：Hypertension Research  

DOI： 10.1038/hr.2013.101

Web of Science

Scopus

PubMed

記述言語：英語  

DOI： 10.1016/j.devcel.2013.04.008

PubMed

記述言語：英語   出版者・発行元：Journal of Experimental Medicine  

Structural cardiac remodeling, including hypertrophy and fibrosis, plays a crucial role in the pathogenesis of heart failure. In vitro studies suggested a role of the small GTPase RhoA in hypertrophic cardiomyocyte growth, but neither the molecular mechanisms leading to RhoA activation nor their relevance in vivo are known. We use here a mass spectrometric approach to identify Rho guanine nucleotide exchange factors (RhoGEFs) activated during cardiac pressure overload in vivo and show that RhoGEF12 is a central player during cardiac remodeling. We show that RhoGEF12 is required for stretch-induced RhoA activation and hypertrophic gene transcription in vitro and that its activation depends on integrin β1 and heterotrimeric G proteins of the G12/13 family. In vivo, cardiomyocyte-specific deletion of RhoGEF12 protects mice from overload-induced hypertrophy, fibrosis, and development of heart failure. Importantly, in mice with preexisting hypertrophy, induction of RhoGEF12 deficiency protects from cardiac decompensation, resulting in significantly increased longterm survival. Collectively, RhoGEF12 acts as an integrator of stretch-induced signaling cascades in cardiomyocytes and is an interesting new target for therapeutic intervention in patients with pressure overload-induced heart failure. © 2013 Takefuji et al.

DOI： 10.1084/jem.20122126

Web of Science

Scopus

PubMed

担当区分：筆頭著者,　責任著者   記述言語：英語  

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  

DOI： 10.1084/jem.20120350

PubMed

記述言語：英語  

DOI： 10.1161/CIRCULATIONAHA.112.109256

PubMed

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）  

担当区分：筆頭著者   記述言語：英語   出版者・発行元：Journal of Human Genetics  

Coronary artery spasm has an important function in the etiology of variant angina and other acute coronary syndromes. Abnormal activation of Rho-family GTPases has been observed in cardiovascular disorders, but the function of genetic variability in Rho-family GTPases remains to be evaluated in cardiovascular disorders. We examined the genetic variability of Rho-family GTPases and their regulators in coronary artery spasm. We performed a comprehensive candidate gene analysis of 67 single nucleotide polymorphisms with amino-acid substitution in Rho-family GTPases and their regulators in 103 unrelated Japanese patients with acetylcholine-induced coronary artery spasm and 102 control Japanese subjects without acetylcholine-induced coronary artery spasm. We noted an association of the single nucleotide polymorphism of ARHGAP9 (rs11544238, Ala370Ser) with coronary artery spasm (odds ratio=2.67). We found that ARHGAP9 inactivated Rac as RacGAP and that the mRNA level of ARHGAP9 was strongly detected in hematopoietic cells. ARHGAP9 negatively regulated cell migration. The Ala370Ser polymorphism counteracted ARHGAP9-reduced cell migration, spreading and adhesion. The Ala370Ser polymorphism in the ARHGAP9 gene is associated with coronary artery spasm. These data suggest that the polymorphism of ARHGAP9 has a critical function in the infiltration of hematopoietic cells into the endothelium and inflammation leading to endothelial dysfunction. © 2010 The Japan Society of Human Genetics. All rights reserved.

DOI： 10.1038/jhg.2009.120

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：Journal of Biological Chemistry  

RhoA is transiently activated by specific extracellular signals such as endothelin-1 (ET-1) in vascular smooth muscle cells. RhoGAP negatively regulates RhoA activity: thus, RhoA becomes the GDP-bound inactive form afterward. Sustained activation of RhoA is induced with high doses of the extracellular signals and is implicated in certain diseases such as vasospasms. However, it remains largely unknown how prolonged activation of RhoA is induced. Here we show that Rho-kinase, an effector of RhoA, phosphorylated p190A RhoGAP at Ser1150 and attenuated p190A RhoGAP activity in COS7 cells. Binding of Rnd to p190A RhoGAP is thought to enhance its activation. Phosphorylation of p190A RhoGAP by Rho-kinase impaired Rnd binding. Stimulation of vascular smooth muscle cells with a high dose of ET-1 provoked sustained RhoA activation and p190A RhoGAP phosphorylation, both of which were prohibited by a Rho-kinase inhibitor. The phosphomimic mutation of p190A RhoGAP weakened Rnd binding and RhoGAP activities. Taken together, these results suggest that ET-1 induces Rhokinase activation and subsequent phosphorylation of p190A RhoGAP, leading to prolonged RhoA activation. © 2009 by The American Society for Biochemistry and Molecular Biology, Inc.

DOI： 10.1074/jbc.M806853200

Web of Science

Scopus

PubMed

記述言語：日本語  

Web of Science

記述言語：日本語  

Web of Science

記述言語：日本語   出版者・発行元：社団法人日本循環器学会  

CiNii Books

CiNii Research

担当区分：筆頭著者   記述言語：英語   出版者・発行元：Biochemical and Biophysical Research Communications  

Rho family GTPases are key regulators of various physiological processes. Several recent studies indicated that the antagonistic relationship between Rho and Rac is essential for cell polarity and that the Rac activity is negatively regulated by Rho. In this study, we found that Rho-kinase, an effector of Rho, counteracted the Rac GEF STEF-induced Rac1 activation in COS7 cells. Rho-kinase phosphorylated STEF at Thr1662 in vitro, and Y-27632, a Rho-kinase inhibitor, suppressed lysophosphatidic acid-induced phosphorylation of STEF in PC12D cells. STEF interacted with specific molecules such as microtubule-associated protein 1B, and the phosphorylation of STEF by Rho-kinase diminished its interaction with these molecules. STEF promoted nerve growth factor-induced neurite outgrowth in PC12D cells, while the phosphomimic mutant of STEF had a weakened ability to enhance neurite outgrowth. Taken together, these results suggest that the phosphorylation of STEF by Rho-kinase exerts the inhibitory effect on the function of STEF. © 2007 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.bbrc.2007.02.028

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：Genes to Cells  

After binding of epidermal growth factor (EGF), the EGF receptor is activated, internalized by endocytosis, and subsequently degraded in the lysosomal pathway. Endocytotic trafficking of the activated EGF receptor is essential for controlling EGF signaling. Upon ligand-induced activation of EGF receptors, Cbl (ubiquitin ligase) binds to the activated receptor and leads to translocation of the CIN85 (Cbl-interacting protein of 85 kDa)/endophilin complex in the vicinity of the activated EGF receptors. Endophilin is known as a key regulator of clathrin-mediated endocytosis, and the translocation of endophilin in the vicinity of active EGF receptor is thought to promote receptor internalization. The constitutively active mutant of small GTPase Rho inhibits EGF receptor endocytosis. In this study, we found that this inhibitory effect was canceled by the dominant negative form of Rho-associated kinase (Rho-kinase), which is an effector of Rho. To clarify the molecular mechanisms of endocytosis downstream of Rho/Rho-kinase signal, we searched for and identified endophilin A1 as a novel substrate of Rho-kinase. We identified the phosphorylation site of endophilin A1 at Thr-14 and made endophilin T14D (substitution of Thr-14 by Asp), which is expected to mimic the phosphorylation state of endophilin A1. Endophilin T14D inhibited EGF receptor internalization. Furthermore, phosphorylation of endophilin by Rho-kinase inhibited the binding to CIN85. Taken together, these results suggest that Rho-kinase phosphorylates endophilin downstream of Rho and regulates EGF receptor endocytosis through the inhibition of binding between endophilin and CIN85. © Blackwell Publishing Limited.

DOI： 10.1111/j.1365-2443.2005.00895.x

Web of Science

Scopus

PubMed

記述言語：日本語  

Web of Science

記述言語：英語   出版者・発行元：Genes to Cells  

Cell migration is important in the development of atherosclerotic lesions. Macrophages and smooth muscle cells migrate into the subendothelial space of arteries, leading to plaque formation. Long-term inhibition of the activity of Rho-kinase induces a regression of atherosclerotic coronary lesions, probably by preventing migration of macrophages and smooth muscle cells. Previous reports concerning the effect of Rho-kinase inhibitors on cell migration are contradictory, however. We examined here the cell type specificity of Rho-kinase inhibitors and found that migration of endothelial cells, macrophages, and smooth muscle cells was inhibited by treatment with Rho-kinase inhibitors in a dose-dependent fashion in a three-dimensional migration assay, whereas that of fibroblasts and epithelial cells was not inhibited. Myosin II inhibitor prevented cell migration in a manner similar to Rho-kinase inhibitors. In contrast, in a two-dimensional migration assay, cell migration was not inhibited by Rho-kinase or myosin II inhibitors for any of the cell types examined. Taken together, these results indicate that Rho-kinase inhibitors suppress migration of specific cell types under specific conditions through the regulation of myosin II activity. Our findings suggest that Rho-kinase is the therapeutic target of atherosclerosis accompanied with invasion by leukocytes and smooth muscle cells. © Blackwell Publishing Limited.

DOI： 10.1111/j.1365-2443.2005.00823.x

Web of Science

Scopus

PubMed

記述言語：英語   出版者・発行元：Developmental Cell  

Rho family GTPases, particularly Rac1 and Cdc42, are key regulators of cell polarization and directional migration. Adenomatous polyposis coli (APC) is also thought to play a pivotal role in polarized cell migration. We have found that IQGAP1, an effector of Rac1 and Cdc42, interacts directly with APC. IQGAP1 and APC localize interdependently to the leading edge in migrating Vero cells, and activated Rac1/Cdc42 form a ternary complex with IQGAP1 and APC. Depletion of either IQGAP1 or APC inhibits actin meshwork formation and polarized migration. Depletion of IQGAP1 or APC also disrupts localization of CLIP-170, a microtubule-stabilizing protein that interacts with IQGAP1. Taken together, these results suggest a model in which activation of Rac1 and Cdc42 in response to migration signals leads to recruitment of IQGAP1 and APC which, together with CLIP-170, form a complex that links the actin cytoskeleton and microtubule dynamics during cell polarization and directional migration. Copyright © 2004 Cell Press.

DOI： 10.1016/j.devcel.2004.10.017

Scopus

PubMed

記述言語：日本語  

Web of Science

記述言語：日本語  

Web of Science

記述言語：日本語  

Web of Science

記述言語：日本語  

PubMed

記述言語：日本語  

Web of Science

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

A 54-year-old woman with an implantable cardioverter-defibrillator was admitted because of convulsion. Previously, she had suffered methicillin-resistant Staphylococcus aureus (MRSA) sepsis induced by a central venous catheter. Despite removal of the central venous catheter and administration of vancomycin, fever and increased C-reactive protein level persisted. MRSA had probably infected the implantable cardioverter-defibrillator system. Gallium scintigraphy showed accumulation at the right subclaviculan area, although local inflammatory signs were absent. Intravascular ultrasonography demonstrated intravenous vegetation at the bifurcation of the right subclavian vein and right internal jugular vein. Antibiotic therapy was not curative, so she underwent extirpation of the intravenous vegetation, which cured the systemic inflammation. Intravascular ultrasonography was useful to differentiate central venous catheter-related infection from implantable cardioverter defibrillator-related infection.

PubMed

記述言語：日本語   出版者・発行元：(公財)鈴木謙三記念医科学応用研究財団  

記述言語：日本語   出版者・発行元：(公財)福田記念医療技術振興財団  

心不全重症度の簡易判定法について検討した。週齢8週の雄マウスから心筋細胞を採取した。採取した心筋細胞からmRNAを抽出し、心筋細胞のmRNAに発現しているGタンパク質共役受容体(GPCR)を測定した。浸透圧ポンプを用いて、GPCRアゴニストをマウスに持続投与した。心不全モデルとして、マウスの大動脈弓に狭窄を作製した。多くのGPCRの発現量はコントロール群と心不全群では変化していないが、心不全により発現量が大きく変化しているGPCRを幾つか見出した。GPCRアゴニストをマウスに4週間投与したところ、心臓の大きさが変化した。この心肥大はアゴニスト濃度を依存的に認め、心エコーにより心駆出率を評価したところ、心駆出率はアゴニスト投与により低下した。アゴニストが心筋細胞そのものを肥大していると考えられた。

記述言語：日本語   出版者・発行元：(公財)日本心臓財団  

その他リンク： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2015&ichushi_jid=J00679&link_issn=&doc_id=20151224150034&doc_link_id=%2Fah2sinzd%2F2015%2Fs04712%2F007%2F1484-1484%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fah2sinzd%2F2015%2Fs04712%2F007%2F1484-1484%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

記述言語：日本語   出版者・発行元：(公財)先進医薬研究振興財団  

記述言語：日本語   出版者・発行元：(公社)日本薬理学会  

記述言語：日本語   出版者・発行元：医歯薬出版(株)  

従来、血管平滑筋の収縮機序は、細胞内Ca2+濃度上昇によるミオシン軽鎖キナーゼの活性を介したミオシン軽鎖のリン酸化で説明されてきた。しかし、細胞内Ca2+濃度とミオシン軽鎖のリン酸化レベルおよび発生張力がかならずしも一致しないことから、細胞内Ca2+濃度以外にも血管平滑筋収縮を制御するメカニズムが存在していると考えられてきた。10年ほど前に、低分子量GTP結合蛋白質Rhoとその標的蛋白質Rho-kinase/ROCK/ROKが細胞内Ca2+濃度に依存しない平滑筋収縮を制御していることが明らかにされ、Rho/Rho-kinaseによる血管平滑筋収縮が冠動脈攣縮や高血圧などの循環器疾患に関与していることがあいついで報告されている。現在、Rho-kinase阻害薬の臨床治験が進行中であり、Rho-kinaseは循環器疾患を中心とした種々の疾患の治療のターゲットとして注目されている。(著者抄録)

その他リンク： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2007&ichushi_jid=J00060&link_issn=&doc_id=20070629270018&doc_link_id=%2Faa7ayuma%2F2007%2F022113%2F019%2F1129-1133%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Faa7ayuma%2F2007%2F022113%2F019%2F1129-1133%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

記述言語：日本語   出版者・発行元：(公財)日本心臓財団  

夜間睡眠時呼吸障害(nocturnal disordered breathing)は慢性心不全および左室収縮機能不全症例の多くに認められ,また高度の夜間睡眠時呼吸障害は心臓死の独立した危険因子であることが知られている.今回われわれは心臓再同期療法(cardiac resynchronization therapy:以下CRT)が心室内伝導障害を有する慢性心不全症例の夜間睡眠時呼吸障害を改善させるか否かについて検討した.対象は2001年6月から2002年1月に当院においてCRTを施行された連続8症例(男性7例,女性1例)であり,CRT施行前と施行1週間後にポリソムノグラフィおよび心機能評価目的でのカテーテル検査をそれぞれ施行し,中枢性無呼吸あるいは閉塞性無呼吸の頻度の変化でCRTによる夜間睡眠時呼吸障害への効果,影響を評価した.CRT施行前では左室内圧波形のpeak positive LVdP/dtは左室ペーシングで平均32.4%,両室ペーシングで30.5%と有意に改善が認められた.無呼吸係数はCRT施行前6.40/hに対し,CRT施行後は1.38/hと有意に減少し(p=0.026),無呼吸-低換気係数もCRT施行前14.9/hに対し,CRT施行後は3.75/hと有意に減少した(p=0.005).また無呼吸の中でも中枢性無呼吸はCRT施行前4.61/hに対し,施行後0.38/hと有意に減少した(p=0.048).心室内伝導障害を有する慢性心不全症例において,CRTは夜間睡眠時呼吸障害および中枢性無呼吸の頻度を減少させた(著者抄録)

その他リンク： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2006&ichushi_jid=J00679&link_issn=&doc_id=20060621320012&doc_link_id=10.11281%2Fshinzo1969.38.6_617&url=https%3A%2F%2Fdoi.org%2F10.11281%2Fshinzo1969.38.6_617&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(公財)日本糖尿病財団  

記述言語：日本語   出版者・発行元：ライフサイエンス出版(株)  

心房細動22例(発作性14例,持続性・慢性8例)に対するCARTOガイド下Extensive Encircling PV Isolation(上下肺静脈を一括して焼灼する肺静脈隔離術)の治療成績について検討した.acute resultは"successful"が22例,"unsuccessful"0例,chronic resultは"successful" 19例,"improve"2例,"unsuccessful"1例であった.これらの結果から本治療法は発作性の患者だけでなく持続性,慢性の患者に対しても有用であると考えられた

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(株)日本臨床社  

記述言語：日本語   出版者・発行元：ライフサイエンス出版(株)  

59歳女.動悸と眩暈感を主訴とした.3日に1回の頻度で心房細動発作が起き,前医にて発作性心房細動の診断のもと種々の抗不整脈薬投与を受けたが効果は認められなかった.その後,抗不整脈薬は中止され,以後持続性の心房細動となった.今回,心房細動に対するカテーテルアブレーション目的で入院となり,肺静脈,上大静脈および左房に起源を持つ心房細動と診断し,バスケットカテーテルガイド下にfocal ablationとisolationを行なった.術後3ヵ月経過しているが心房細動の再発は認めていない

記述言語：日本語   出版者・発行元：日本心血管インターベンション学会  

1999年2月1日〜2000年4月1日の間に待機的経皮的冠動脈形成術(PCI)施行前に動脈造影法(QCA),血管内超音波(IVUS)を施行した133例151病変を対象とし,IVUSによって測定した血管内腔径を基準として,小血管におけるQCAの問題点について検討した.QCAによって測定した対照血管径(RD)は2.64±0.09mm,病変長は11.3±0.8mm,狭窄率(%DS)は60.2±1.8%で,IVUSを用いて計測した対照内腔径(LD)は2.62±0.08mmであった.RDとLDはr=0.67と有意な相関を示した.RDが2.8mm以上の群ではその相関性は保たれていたが,2.8mm未満の群ではRDとLDの相関は弱まった.QCA上2.5mm未満と測定された66病変のうち,34.8%がIVUS上2.5mm以上の内腔径であった

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：ライフサイエンス出版(株)  

心室内伝導障害を有するうっ血性心不全症例において,左室ペーシングと両室ペーシングが左室収縮能に及ぼす急性効果について比較検討した.左脚ブロック型心室内伝導障害を有する心不全患者18例を対象とした.洞調律症例11例と同様,心房細動症例7例においても,左室ペーシングと両室ペーシングはLV dP/dt maxを同等に改善した.洞調律症例と心房細動症例におけるLV dP/dt maxの改善率を比べたところ,ペーシングによるLV dP/dt maxの改善効果は,心房細動症例でも洞調律症例とほぼ同等であった.心不全患者におけるペーシング療法の左室収縮能に対する効果は,房室伝導時間の最適化を介するメカニズムよりも心室収縮の同期性の改善の方が大きいことが示唆された

記述言語：日本語   出版者・発行元：臨床心臓電気生理研究会  

63歳女.主訴は突然の動悸発作.心房頻拍と診断され,Cibenzoline,pilsicainide,verapamilを投与されたが無効であり,Carvedilol投与により心拍数はコントロールされた.頻拍は最初周期長257〜266msecの心房頻拍であった(AT1).右房でpost pacing interval(PPI)を検討したところ,PPIは頻拍周期に一致せず,頻拍は左房起源と考えられた.左房のelectroanatomical mapping(CARTO)を施行したところ,AT1は僧帽弁輪を反時計方向に旋回するマクロリエントリー性ATと考えられた.僧帽弁輪と弁輪近傍のscarの間に線状焼灼を加えたところ,頻拍周期は305msecに延長した.そこで再度CARTOを施行した.左上肺静脈(LSPV)にanchorする左房天井部の伝導ブロック部(DP)の周囲を旋回するマクロリエントリー性ATと考えられた.左房天井部のDPのgap部位での通電で頻拍は停止した.しかし,2ヵ月後周期長378〜387msecの心房頻拍(AT3)が再発した.CARTOではあたかもAT2の逆回りの興奮順序を呈したが,左房のactivation timeは224msecと短く頻拍周期をカバーしなかった.以上から,AT3のメカニズムはfocal ATと診断された.頻拍は最早期興奮部位での通電で停止した.術後2ヵ月半経過するが頻拍の再発は認められていない

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：日本心血管インターベンション学会  

ステント植え込み術を施行し,初期成功の得られた糖尿病症例80例87病変を対象とし,血糖コントロールの良否が遠隔期のステント内新生内膜増殖に与える影響を検討した.血糖コントロール良好な群が不良な群に比して遠隔期の新生内膜増殖率が少なかった.血糖コントロールを良好に保つことにより,ステント植え込み後の遠隔期成績が改善する可能性が示唆された

記述言語：日本語   出版者・発行元：(公社)日本超音波医学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本不整脈心電学会  

記述言語：日本語   出版者・発行元：(一社)日本不整脈心電学会  

記述言語：日本語   出版者・発行元：(一社)日本不整脈心電学会  

記述言語：日本語   出版者・発行元：(一社)日本心臓病学会  

54歳女.埋め込み型除細動器を装着していたが,痙攣発作の精査のため入院となり,経過中に中心静脈カテーテルを誘引としてメチシリン耐性黄色ブドウ球菌敗血症をきたした.カテーテル抜去及びバンコマイシン投与にも拘わらず発熱と炎症所見の持続が認められ,埋め込み型除細動器への感染が危惧された.Gaシンチグラムで右鎖骨下の集積を認めたが,その際に同部の感染所見は認めなかった.血管内エコー法を実施し,右鎖骨下静脈と右内頸静脈分岐部に疣贅を認めた.抗生物質に不応性であったため静脈内疣贅摘出術を施行し,感染徴候は速やかに改善した.血管内エコー法が感染源の特定及び治療法の選択に有用であると考えられた

その他リンク： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2002&ichushi_jid=J02134&link_issn=&doc_id=20020722330005&doc_link_id=1572261549643877376&url=https%3A%2F%2Fcir.nii.ac.jp%2Fcrid%2F1572261549643877376&type=CiNii&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00003_1.gif

記述言語：日本語   出版者・発行元：ライフサイエンス出版(株)  

electroanatomical mapping(CARTO)法を用いてカテーテルアブレーション治療を行った心房頻拍(AT)症例10例を対象に,CARTOシステムの有用性を検討した.その結果,頻拍の根治に成功したのは8例で,根治困難なタイプの心房頻拍も根治可能であった.しかし,頻拍回路の決定が困難な場合には従来のentrainment mappingの手法の併用が必要と考えられた

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本循環器学会  

記述言語：日本語   出版者・発行元：(一社)日本不整脈心電学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本不整脈学会  

記述言語：日本語   出版者・発行元：(NPO)日本冠疾患学会  

記述言語：日本語   出版者・発行元：(NPO)日本冠疾患学会  

記述言語：日本語   出版者・発行元：日本赤十字社医学会  

記述言語：日本語   出版者・発行元：日本赤十字社医学会  

記述言語：日本語   出版者・発行元：(一社)日本心臓病学会  

開催年月日： 2021年3月

記述言語：英語   会議種別：シンポジウム・ワークショップ パネル（指名）  

国名：日本国  

開催年月日： 2018年3月

記述言語：英語   会議種別：シンポジウム・ワークショップ パネル（公募）  

開催年月日： 2018年1月

記述言語：英語   会議種別：ポスター発表  

国名：アメリカ合衆国  

循環器治療薬の薬理学的作用

心筋疾患、感染性心疾患