2022 Fiscal Year Final Research Report
Drug screening based on mouse replicating human atrial fibrillation phenotype
Project/Area Number |
21K19477
|
Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
|
Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 53:Organ-based internal medicine and related fields
|
Research Institution | Tokyo Medical and Dental University |
Principal Investigator |
|
Project Period (FY) |
2021-07-09 – 2023-03-31
|
Keywords | 心房細動 / マウスモデル / 心不全 |
Outline of Final Research Achievements |
RBM20 is a splicing regulator, and its loss-of-function mutations have been shown to produce dilated cardiomyopathy (DCM) via splicing defects in multiple target genes, including the titin (TTN) gene. We have shown that Rbm20S634A mice are the first mice in the world to develop human-like spontaneous chronic atrial fibrillation. In this study, we investigated the molecular mechanism by which Rbm20S634A mice develop atrial fibrillation, and found that a defect in RNA metabolism in the cytoplasmic P-body leads to human-like spontaneous atrial fibrillation.
|
Free Research Field |
循環器内科
|
Academic Significance and Societal Importance of the Research Achievements |
心房細動は、最も頻度の高い不整脈であり、年齢とともに指数関数的に発症頻度が増えること、高頻度に脳梗塞・心不全・認知症を合併する。心房細動を伴う脳梗塞は特に重症であり、我が国の寝たきりの約20%は心房細動にともなう脳梗塞であるという統計もあり、超高齢化社会を迎えた我が国ではその対策が喫緊の課題である。本プロジェクトでは、ヒト類似の心房細動のマウスモデルを世界で初めて作成したことから、社会的に意義がある。また、同モデルの解析から心房細動の新たな分子メカニズムを明らかにしたことが、学術的に意義がある点と考えられる。
|