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2021 Fiscal Year Final Research Report

Development of a novel therapeutic drug for the treatment of heart failure by cell protection

Research Project

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Project/Area Number 20K21600
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 53:Organ-based internal medicine and related fields
Research InstitutionKyoto University

Principal Investigator

Ono Koh  京都大学, 医学研究科, 准教授 (00359275)

Project Period (FY) 2020-07-30 – 2022-03-31
KeywordsATP / 心不全 / 心筋梗塞
Outline of Final Research Achievements

In heart failure, ATP levels in cardiomyocytes decrease. Kyoto University substance 121 (KUS121) increases ATP levels in cells. When KUS121 was administered to a mouse model of heart failure, PCr/ATP ratio and left ventricular ejection fraction were rapidly improved after KUS121 administration. In a canine heart failure model, administration of KUS121 also improved left ventricular contractility and reduced end-diastolic pressure. In cultured cardiomyocytes, KUS121 improved contractility and diastolic capacity without altering peak Ca2+ levels or contraction time.
KUS121 improves heart failure through a different mechanism than conventional catecholamines and may be a new option for the treatment of heart failure.

Free Research Field

循環器内科学

Academic Significance and Societal Importance of the Research Achievements

現在、わが国の疾患別死因の中で、心疾患は15.2%を占め、悪性新生物に続いて第2番目となっている。心不全患者は、急性心不全を繰り返してやがて死に至る。その原因としては、急性心不全治療に用いられる薬剤が十分でないことが理由として挙げられる。具体的には、破綻した血行動態を急激に改善させるために、カテコラミンやPDE阻害薬といった強心薬を用いるために、かえって心臓の線維化や慢性期の心機能を悪化させているのが現状である。これまでの検討より、KUS121が急性心不全治療の治療法を根本的に変え、心不全患者の予後を劇的に改善する理想的な薬剤となる可能性がある。

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Published: 2023-01-30   Modified: 2025-01-30  

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