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2021 Fiscal Year Final Research Report

Molecular mechanism for after-load mismatch involved in the development of acute heart failure accompanied by chronic renal dysfunction

Research Project

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Project/Area Number 19H03659
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionNara Medical University

Principal Investigator

Saito Yoshihiko  奈良県立医科大学, 医学部, 教授 (30250260)

Co-Investigator(Kenkyū-buntansha) 尾上 健児  奈良県立医科大学, 医学部, 講師 (90510173)
熊澤 拓也  奈良県立医科大学, 医学部, 研究員 (10745441)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords急性心不全 / アフターロードミスマッチ / βアドレナリン受容体 / 脱感作
Outline of Final Research Achievements

Although afterload mismatch has been more widely recognized as one of the pathological conditions of acute heart failure than before, its molecular mechanism has not been clarified. Applicants found by using patient specimens that activation of β-adrenergic receptor (βADR) in myocardium and subsequent desensitization of βADR are involved in the development of Takotsubo syndrome, which is one of the causes of acute heart failure. With reference to this achievement, we proved the model mice which had the desensitization of βADR in blood vessels (causing contraction of blood vessels) developed afterload mismatch. This study is the first one in the world to prove that desensitization of the vascular endothelium causes an afterload mismatch.

Free Research Field

急性心不全

Academic Significance and Societal Importance of the Research Achievements

我が国は、超高齢社会に突入するとともに、少子高齢化の影響を強く受け、今後、全人口は減少していくが、75歳以上人口のみは、今後20年間にわたり増加することが推測されている。この75歳以上の後期高齢者において、現在でも第1位の死因は脳卒中を含む循環器病であり(悪性腫瘍ではない)、中でも心不全の占める割合が今後増加することが確実視されている。本研究において、急性心不全の比較的頻繁に認められるafterload mismatchの分子機序を証明したことで、今後急性心不全予防のために、どのような治療的アプローチを取るべきかを見出していく重要なステップとなる。

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Published: 2023-01-30  

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