• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Explore the new heart failure therapy focus on calmodulin translocation in cardiac myocytes

Research Project

Project/Area Number 16K09502
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Cardiovascular medicine
Research InstitutionYamaguchi University

Principal Investigator

ODA Tetsuro  山口大学, 医学部附属病院, 助教 (40569290)

Co-Investigator(Kenkyū-buntansha) 山本 健  山口大学, 大学院医学系研究科, 教授 (50363122)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsリアノジン受容体 / カルモジュリン / GRK5 / ダントロレン / アンレキサノクス / HDAC5 / 病的心肥大 / HDAC / 心肥大 / シグナル伝達
Outline of Final Research Achievements

In cardiac myocytes Calmodulin (CaM) bound to the ryanodine receptor (RyR2) constitutes a large pool of total myocyte CaM. Knock-in mice expressing RyR2 unable to bind CaM developed hypertrophy and early death. However, it is unknown whether CaM released from this RyR2-bound pool participates in pathological cardiac hypertrophy.
We found that angiotensin II (AngII) causes CaM to dissociate from the RyR2 and translocate to the nucleus. To test whether this nuclear CaM accumulation depends on CaM released from RyR2, we enhanced CaM-RyR2 binding affinity with dantrolene. Dantrolene dramatically reduced nuclear CaM accumulation. After 2-8 weeks of pressure overload (TAC) the binding affinity of CaM to RyR2 was reduced, nuclear CaM was elevated. Stress (acute AngII or TAC) causes CaM dissociation from RyR2 and translocation to the nucleus. Thus CaM dissociation from RyR2 may be an important step in driving pathological hypertrophic gene transcription.

Academic Significance and Societal Importance of the Research Achievements

今後、我が国は超高齢化社会を迎えることが確実であり、今以上に心不全による死亡や入院が増加することが予想される。よって、今までの標準薬物治療にとって変わる、または標準治療に追加できる新たな心不全治療薬の開発が喫緊の課題である。本研究は、カルシウム放出チャンネルであるリアノジン受容体の安定化に寄与しているカルモジュリンの心筋細胞内動態に注目した。病的心肥大や心不全時にはリアノジン受容体からカルモジュリンが解離し、その解離したカルモジュリンは細胞の核内へ移行しており、病的肥大心のシグナル活性に関与していることを解明した。カルモジュリンの動態制御に注目した新しい病的心肥大抑制薬の開発が期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report

Research Products

(6 results)

All 2018 2017 2016

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Nuclear translocation of calmodulin in pathological cardiac hypertrophy originates from ryanodine receptor bound calmodulin2018

    • Author(s)
      Oda Tetsuro、Yamamoto Takeshi、Kato Takayoshi、Uchinoumi Hitoshi、Fukui Go、Hamada Yoriomi、Nanno Takuma、Ishiguchi Hironori、Nakamura Yoshihide、Okamoto Yoko、Kono Michiaki、Okuda Shinichi、Kobayashi Shigeki、Bers Donald M.、Yano Masafumi
    • Journal Title

      J Mol Cell Cardiol

      Volume: 125 Pages: 87-97

    • DOI

      10.1016/j.yjmcc.2018.10.011

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Dissociation of calmodulin from cardiac ryanodine receptor plays a pivotal role in driving pathological cardiac hypertrophy2018

    • Author(s)
      小田 哲郎
    • Organizer
      第1回日本循環器学会基礎研究フォーラム
    • Related Report
      2017 Research-status Report
  • [Presentation] Dissociation of calmodulin from cardiac ryanodine receptor plays a pivotal role in driving pathological cardiac hypertrophy2018

    • Author(s)
      小田 哲郎
    • Organizer
      Biophysical Society 62nd Annual Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Calmodulin, which dissociated from cardiac ryanodine receptor and translocation to the nucleus, plays a pivotal role in driving pathological cardiac hypertrophy2017

    • Author(s)
      小田 哲郎
    • Organizer
      第21回日本心不全学会学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Nuclear translocation of calmodulin, which dissociated from cardiac ryanodine receptor (RyR2), promotes the pathological cardiac hypertrophy2016

    • Author(s)
      小田 哲郎
    • Organizer
      American Heart Association Scientific Sessions
    • Place of Presentation
      Ernest N. Morial Convention Center, New Orleans, Louisiana, United States Of America
    • Year and Date
      2016-11-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nuclear translocation of both calmodulin, which bind to RyR2, and G protein-coupled receptor kinase 5 promote the pathological cardiac hypertrophy2016

    • Author(s)
      小田 哲郎
    • Organizer
      第20回日本心不全学会学術集会
    • Place of Presentation
      ロイトン札幌・ホテルさっぽろ芸文館 (北海道 札幌市)
    • Year and Date
      2016-10-07
    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi