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2023 Fiscal Year Final Research Report

A new treatment for heart failure and cardiac hypertrophy by controlling calmodulin translocation into the nucleus

Research Project

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Project/Area Number 21K08054
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionYamaguchi University

Principal Investigator

Yamamoto Takeshi  山口大学, 大学院医学系研究科, 教授 (50363122)

Co-Investigator(Kenkyū-buntansha) 小田 哲郎  山口大学, 医学部附属病院, 講師 (40569290)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsカルモジュリン / リアノジン受容体 / 心不全 / 心肥大
Outline of Final Research Achievements

This study demonstrated that calmodulin (CaM) bound to myocardial ryanodine receptor (RyR2) is a key molecule in the progression of heart failure and cardiac hypertrophy, and aims to establish a novel treatment for heart failure and cardiac hypertrophy. We demonstrated that increasing the affinity of calmodulin for RyR2 genetically or pharmacologically with dantrolene suppresses cardiac hypertrophy and heart failure in MI model mice, MI model mice with LAD ligation, and unilateral nephrectomy + mineralocorticoid tablet implantation + salt-loaded rats.

Free Research Field

循環器内科学

Academic Significance and Societal Importance of the Research Achievements

RyR2からのCaMの解離は、CPVTや頻脈誘発性心不全のみならず慢性左室圧負荷などの後天的な病態でも共通して認められる。我々はCaMはRyR2チャネル調節のkey分子であることを突き止めた。本研究ではCaM解離を遺伝的または薬理的に防ぎRyR2からのCa2+漏出を抑制することで、心肥大・心不全の発症の阻止を図るという極めて斬新かつ独創的な治療戦略となった。

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Published: 2025-01-30  

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