2023 Fiscal Year Final Research Report
Peripheral circulatory regulation mechanism by a novel induced endothelium-derived hyperpolarizing factor in diastolic dysfunction
Project/Area Number |
21K11729
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 59040:Nutrition science and health science-related
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Research Institution | Nara Medical University |
Principal Investigator |
Kudo Risa 奈良県立医科大学, 医学部, 講師 (20347545)
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Co-Investigator(Kenkyū-buntansha) |
勇井 克也 奈良県立医科大学, 医学部, 助教 (50783875)
粕田 承吾 奈良県立医科大学, 医学部, 教授 (70434941)
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Project Period (FY) |
2021-04-01 – 2024-03-31
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Keywords | 拡張不全 / 高血圧 / 血管内皮細胞由来過分極因子 / 末梢循環 |
Outline of Final Research Achievements |
This study is the first to show that the pathway of inducible endothelium-derived hyperpolarizing factor (iEDHFs), which are novel mediators with vasorelaxant effects, was activated in the peripheral arteries of a rat model of hypertensive heart failure. It contributed to regulating peripheral circulation by suppressing increases in blood pressure. iEDHFs were not induced during the hypertensive phase, when circulatory regulation by nitric oxide (NO) is predominant. iEDHFs were induced to replace NO during the diastolic failure phase, the early stage of heart failure.
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Free Research Field |
血管学
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Academic Significance and Societal Importance of the Research Achievements |
近年、高齢者心不全の多くは、左室収縮機能が保持されつつ拡張機能障害を主体とする拡張不全である。拡張不全は予後不良であり、確立した治療法はなく、その発症および病態進展機序の解明、予後改善のための治療法の開発が急務となっている。拡張不全の発症基盤には高血圧があり、心臓単独の疾患ではなく心臓と動脈系の相互作用から惹起されることから、本研究で示したiEDHFsによる末梢循環調節機構の解明は、高血圧や拡張不全などの心血管病の治療法の開発の手がかりとなり、創薬への応用が期待される。
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