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Cardiac lipid droplets and gap junction remodeling

Research Project

Project/Area Number 18K08471
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionUniversity of Fukui

Principal Investigator

Suzuki Jinya  福井大学, 学術研究院医学系部門(附属病院部), 講師 (20293417)

Co-Investigator(Kenkyū-buntansha) 弘瀬 雅教  岩手医科大学, 薬学部, 教授 (40273081)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords脂肪心筋 / 脂肪滴 / Perilipin 2 / 心房細動 / Connexin 43 / 脂肪毒性 / Connexin43 / Perilipin2 / 脂質シグナル / コネキシン43 / リモデリング / gap junction / リピッドシグナル / コネキシン43 / 不整脈 / Gap junction / コネキシン
Outline of Final Research Achievements

We have created a mouse model of cardiac steatosis: cardiac-specific PLIN2-overexpressing mice (PLIN2-Tg). PLIN2-Tg are prone to atrial fibrillation (AF) associated with lateral distribution of a gap junction protein connenxin (Cx)43 in atrial cardiomyocytes. Analysis of aged PLIN2-Tg have revealed that accumulation of ceramide, diacylglycerol and triacylglycerol (TAG), and altered phospholipid profile might be critical for Cx43 remodeling in the aged condition. Eight week-administration of a GLP-1 agonist dulaglutide achieved 60% decrease in atrial TAG content, 45% decrease in AF susceptibility, and 60% decrease in AF duration. Cardiac steatosis would be a novel therapeutic target for AF in diabetic patients.

Academic Significance and Societal Importance of the Research Achievements

糖尿病患者は心房細動などの不整脈を合併し易く、それらが患者の健康寿命に多大な影響を与えている。本研究は糖尿病性心筋症の特徴である脂肪心筋が心房細動を誘発する分子メカニズムの一端を解明し、その治療法を検証した。GLP-1受容体アゴニストは既に糖尿病治療薬として使われているため、即座に臨床応用が可能である。本研究により「脂肪滴→刺激伝導障害」という新たな病態生理が解明され、糖尿病患者の不整脈に対する新たな治療戦略へ発展すると思われる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (3 results)

All 2020 2019

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] Cardiac overexpression of perilipin 2 induces atrial steatosis, connexin 43 remodeling, and atrial fibrillation in aged mice.2019

    • Author(s)
      Sato S, Suzuki J, Hirose M, Yamada M, Zenimaru Y, Nakaya T, Ichikawa M, Imagawa M, Takahashi S, Ikuyama S, Konoshita T, Kraemer FB, Ishizuka T.
    • Journal Title

      Am J Physiol Endocrinol Metab

      Volume: 317 Issue: 6 Pages: E1193-E1204

    • DOI

      10.1152/ajpendo.00227.2019

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Perilipin2過剰発現による脂肪心筋マウスの心房細動はGLP1受容体作動薬により抑制される2020

    • Author(s)
      佐藤さつき, 鈴木仁弥, 弘瀬雅教, 東慎一郎, 杉山光寿, 古谷真知, 帰山沙織,中屋隆裕, 山田実夏, 市川麻衣, 斉藤理恵, 今川美智子, 銭丸康夫, 此下忠志, 石塚 全
    • Organizer
      第52回日本動脈硬化学会総会・学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] GLP1受容体作動薬はPerilipin2過剰発現による脂肪心筋マウスの心房細動を抑制する2020

    • Author(s)
      佐藤さつき, 鈴木仁弥, 東慎一郎, 杉山光寿, 帰山沙織, 古谷真知, 中屋隆裕,山田実夏, 市川麻衣, 斉藤理恵, 今川美智子, 銭丸康夫, 弘瀬雅教, 石塚 全, 此下忠志
    • Organizer
      第63回日本糖尿病学会年次学術集会
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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