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

糖尿病が誘発する筋機能低下の分子メカニズムの解明

Research Project

Project/Area Number 16J11193
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Applied health science (B)
Research InstitutionJuntendo University

Principal Investigator

江島 弘晃  順天堂大学, 順天堂大学大学院医学研究科, 特別研究員(PD)

Project Period (FY) 2016-04-22 – 2019-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords骨格筋 / 筋力 / 細胞内Ca2+ / 運動トレーニング / 糖尿病 / インスリン抵抗性 / 肥満 / カルシウムイオン
Outline of Annual Research Achievements

本研究は肥満2型糖尿病による筋力低下の要因に細胞内Ca2+調節が関連していると仮説を立て検証した。また、代謝疾患の予防・改善に効果的である継続的な運動(運動トレーニング)による効果も合わせて実施した。肥満2型糖尿病モデル動物(以下db/db)を対象に、単離した骨格筋の電気刺激時の発揮筋力およびCa2+イメージング法による細胞内Ca2+レベルを測定した。db/dbはコントロールのdb/+よりも電気刺激時による筋力および細胞内Ca2+放出能が著しく低下していること、電気刺激時および薬理学的手法による細胞内Ca2+放出が著しく低下していることを明らかにした。さらに、実験動物用トレッドミル装置による6週間の運動トレーニングをdb/dbに実施させたところ、db/dbの全身性糖代謝能(糖負荷試験による血糖降下率)に変化はないものの、筋力の低下および細胞内Ca2+放出能の低下が改善されることを明らかにした。これらの結果は、肥満2型糖尿病による筋力低下は血糖調節(高血糖)が主要因ではなく、細胞内Ca2+放出の障害が糖尿病の筋力低下に大きく関与していることを示唆している。今後は、糖尿病が誘発する骨格筋機能低下と細胞内Ca2障害+の関連性及び分子機序の解明を行う。

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (13 results)

All 2018 2017 2016

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 2 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Skeletal muscle microvascular and interstitial PO2 from rest to contractions.2018

    • Author(s)
      Hirai DM, Craig JC, Colburn TD, Eshima H, Kano Y, Sexton WL, Musch TI, Poole DC.
    • Journal Title

      J Physiol.

      Volume: 596 Pages: 869-883

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improved skeletal muscle Ca2+ regulation in vivo following contractions in mice overexpressing PGC-1α.2017

    • Author(s)
      Eshima H, Miura S, Senoo N, Hatakeyama K, Poole DC, Kano Y.
    • Journal Title

      Am J Physiol Regul Integr Comp Physiol.

      Volume: 312 Pages: 1017-1028

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Long-term, but not short-term high-fat diet induces fiber composition changes and impaired contractile force in mouse fast-twitch skeletal muscle2017

    • Author(s)
      Eshima H,Tamura Y, Kakehi S, Kurebayashi N, Murayama T, Nakamura K, Kakigi R,Okada T,Sakurai T, Kawamori R, Watada H
    • Journal Title

      Physiological reports

      Volume: 5 Issue: 7 Pages: e13250-e13250

    • DOI

      10.14814/phy2.13250

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] In vivo Ca2+ dynamics induced by Ca2+ injection in individual rat skeletal muscle fibers2016

    • Author(s)
      Mario Wakizaka, Hiroaki Eshima, Yoshinori Tanaka, Hideki Shirakawa, David C. Poole, Yutaka Kano
    • Journal Title

      Physiological Reports

      Volume: 5 Issue: 5

    • DOI

      10.14814/phy2.13180

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 運動トレーニングは2型糖尿病による骨格筋の機能低下と細胞内Ca2+調節能を改善させる2017

    • Author(s)
      江島弘晃、田村好史、筧佐織、河盛隆造、綿田裕孝
    • Organizer
      日本体力医学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 2型糖尿病は筋細胞内Ca2+調節の障害に伴い発揮筋力の低下を惹起する2017

    • Author(s)
      江島弘晃
    • Organizer
      第5回骨格筋生物学研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Skeletal Muscle Contractile Force Dysfunction Concurrently with Intracellular Ca2+ Dysregulation in a Mouse Model of Type 2 Diabetes2017

    • Author(s)
      Eshima H、Tamura Y、Kakehi S、Kawamori R、Watada H
    • Organizer
      CaBP20th
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exercise training improves contractile force dysfunction concurrently with intracellular Ca2+ dysregulation in skeletal muscle in a mouse model of type 2 diabetes2017

    • Author(s)
      Eshima H、Tamura Y、Kakehi S、Kawamori R、Watada H
    • Organizer
      Cell Symposia
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Skeletal muscle contractile function in diabetes2017

    • Author(s)
      Eshima H
    • Organizer
      Indiana University School of Medicine
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 代謝疾患時における骨格筋の収縮特性2017

    • Author(s)
      江島弘晃
    • Organizer
      第9回分子骨格筋代謝研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Maintenance of contractile force and increased fatigue resistance in slow-twitch skeletal muscle of long-term high-fat-fed mice.2016

    • Author(s)
      Eshima H, Tamura Y, Kakehi S, Kawamori R, Watada H.
    • Organizer
      Exerimental Biology
    • Place of Presentation
      Chicago
    • Year and Date
      2016-11-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A long-term high fat diet causes muscle dysfunction in mouse fast-twitch skeletal muscle.2016

    • Author(s)
      Eshima H, Tamura Y, Kakehi S, Kawamori R, Watada H.
    • Organizer
      APS; Intersociety meeting, The integrative biology of exercise VII
    • Place of Presentation
      Phoenix
    • Year and Date
      2016-11-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In vivo Ca2+ buffering capacity following muscle contractions in skeletal muscle of pgc-1α overexpressing mice.2016

    • Author(s)
      Eshima H, Miura S, Poole DC, Kano Y.
    • Organizer
      American College of Sports Medicine
    • Place of Presentation
      Boston
    • Year and Date
      2016-05-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2016-05-17   Modified: 2024-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi