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The involvement of ER stress-induced Ca2+ signaling with the development of diabetes mellitus

Research Project

Project/Area Number 17K07345
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Functional biochemistry
Research InstitutionTeikyo Heisei University

Principal Investigator

Shinichiro Yamamoto  帝京平成大学, 薬学部, 准教授 (10542102)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsCa チャネル / 小胞体ストレス / 糖尿病 / TRPM2 / 酸化的ストレス / カルシウムシグナリング / 酸化ストレス / カルシウムシクナリング / シグナル伝達 / 生体分子
Outline of Final Research Achievements

Oxidative stress induced TRPM2-dependent intracellular Ca2+ concentration increases in islets, although high glucose-induced intracellular Ca2+ concentration increases were TRPM2-independent. Next, we investigated the involvement of TRPM2 with the aggravation of diabetes mellitus by using diabetes model mice, Akita mice. Akita mouse has a mutation (Cys96Tyr) in the insulin 2 gene. The mutant insulin induce beta cell damage accompanied with ER stress, leading to the development of diabetes mellitus. Blood glucose elevation, glucose tolerance disorder, and the decrease of insulin secretion, and insulin content in islets observed in Akita mice were improved by Trpm2 deficiency.
These data suggested that TRPM2 is involved in the development of diabetes mellitus accompanied with ER stress-induced beta cell damage.

Academic Significance and Societal Importance of the Research Achievements

現在二型糖尿病における β 細胞を標的にした薬としてインスリン分泌を促進させる薬が主に使用されている。しかしインスリン分泌を促進させ続けることは小胞体ストレスならび β 細胞障害を促進することにつながる。本申請研究では二型糖尿病の発症および増悪への TRPM2 の関与を明らかにし、β 細胞における二型糖尿病の発症および増悪を防ぐ創薬のターゲットとしてTRPM2 を提示できた。従って本申請研究により二型糖尿病発症に新たな側面からのアプローチを可能にし、新規創薬ターゲット分子を提示できたと言える。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (1 results)

All 2019

All Presentation (1 results)

  • [Presentation] タンパク質品質管理機構と Transient receptor potential melastatin 22019

    • Author(s)
      山本伸一郎
    • Organizer
      分子から個体へ:俯瞰と接近の生命科学
    • Related Report
      2019 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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