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Drug screening based on mouse replicating human atrial fibrillation phenotype

Research Project

Project/Area Number 21K19477
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 InstitutionTokyo Medical and Dental University

Principal Investigator

Furukawa Tetsushi  東京医科歯科大学, 難治疾患研究所, 教授 (80251552)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords心房細動 / マウスモデル / 心不全 / 薬物スクリーニング
Outline of Research at the Start

心房細動は高齢者に多く、高頻度に脳梗塞を合併し、寝たきりの約20%の原因となる。また約1/3で心不全を合併し、高いmortality・morbidityを示す。2007年より超高齢社会(高齢者21%以上)に突入した我が国では、その対策が喫緊の課題である。ところが、非侵襲的治療としては、抗凝固薬による脳梗塞予防薬などがあるだけで、根本的な治療薬は存在しない。その理由として、ヒト心房細動を再現する小動物モデルが存在しないこと、有効なin vitroアッセイ系がないこと、の2つがあげられる。本計画では、世界初のヒト心房細動病態を再現するマウスモデルを用いて心房細動治療薬のスクリーニング系を構築する。

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.

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。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (6 results) (of which Invited: 2 results)

  • [Journal Article] Prediction of the Presence of Ventricular Fibrillation From a Brugada Electrocardiogram Using Artificial Intelligence2023

    • Author(s)
      Nakamura Tomofumi、Aiba Takeshi、Shimizu Wataru、Furukawa Tetsushi、Sasano Tetsuo
    • Journal Title

      Circulation Journal

      Volume: 87 Issue: 7 Pages: 1007-1014

    • DOI

      10.1253/circj.CJ-22-0496

    • ISSN
      1346-9843, 1347-4820
    • Year and Date
      2023-06-23
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Local Injection of Hydroxyapatite Electret Ameliorated Infarct Size After Myocardial Infarction2022

    • Author(s)
      Yamaguchi Junji、Chiba Risako、Komuro Hiroaki、Ihara Kensuke、Nozaki Kosuke、Nagai Akiko、Furukawa Tetsushi、Sasano Tetsuo
    • Journal Title

      Circulation Reports

      Volume: 4 Issue: 1 Pages: 38-47

    • DOI

      10.1253/circrep.CR-21-0100

    • NAID

      130008140051

    • ISSN
      2434-0790
    • Year and Date
      2022-01-07
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] <scp>JCS</scp> / <scp>JHRS</scp> 2020 Guideline on Pharmacotherapy of Cardiac Arrhythmias2022

    • Author(s)
      Ono Katsushige、Iwasaki Yu‐ki、Hiroshige Murata et al.
    • Journal Title

      Journal of Arrhythmia

      Volume: 38 Issue: 6 Pages: 833-973

    • DOI

      10.1002/joa3.12714

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Atrial Fibrillation in Cardiomyopathy Mice with Rbm20 Mutation2022

    • Author(s)
      Ihara K, Kuroyanagi H, Hiraoka Y, Sasano T, Furukawa T
    • Organizer
      The 86th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] The effects of Sacubitril/Valsartan on murine atria with pressure overload2022

    • Author(s)
      Iwamiya S, Ihara K, Furukawa T, Sasano T
    • Organizer
      The 86th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2021 Research-status Report
  • [Presentation] 心不全モデルのマウス心房に対するSacubitril/Valsartanの電気生理学的効果2021

    • Author(s)
      岩宮賢、井原健介、古川哲史、笹野哲郎
    • Organizer
      第262回日本循環器学会関東甲信越地方会
    • Related Report
      2021 Research-status Report
  • [Presentation] The effects of Sacubitril/Valsartan on electrophysiological properties of atria in murine hearts with pressure overload2021

    • Author(s)
      Iwamiya S, Ihara K, Furukawa T, Sasano T
    • Organizer
      The 5th JCS Council Forum on Basic CardioVascular Research
    • Related Report
      2021 Research-status Report
  • [Presentation] 心房細動モデルマウスのoptical mapping による評価2021

    • Author(s)
      岩宮賢、井原健介、富井直輝、山崎正俊、黒柳秀人、佐久間一郎、古川哲史、笹野哲郎
    • Organizer
      心電学関連春季大会2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 心不全モデルマウスにおけるSacubitril/Valsartanの心房への電気生理学的効果2021

    • Author(s)
      岩宮賢、井原健介、古川哲史、笹野哲郎
    • Organizer
      心電学関連春季大会2021
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2024-01-30  

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