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A novel mechanism of type 2 diabetes through S-nitrosylation and development of new therapies

Research Project

Project/Area Number 18K06952
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Shinozaki Shohei  東京医科歯科大学, 大学院医歯学総合研究科, 非常勤講師 (40622626)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords糖尿病 / 一酸化窒素 / S-ニトロソ化 / インスリン抵抗性 / GSNOR / iNOS / 慢性炎症
Outline of Final Research Achievements

Analysis of tissue-specific GSNOR knockout mice revealed that liver-specific GSNOR-deficient mice had improved systemic insulin sensitivity, whereas muscle-specific GSNOR-deficient mice had increased systemic insulin resistance. Insulin clamp method was performed on whole-body GSNOR-deficient mice, it revealed that the hepatic glucose output after insulin loading was significantly reduced as compared with the wild type. However, drug-induced inhibition of GSNOR reduced systemic insulin sensitivity. It was revealed that GSNOR has different roles depending on the tissue, and that deficiency in the liver increases systemic insulin sensitivity, but deficiency in muscle increases resistance.

Academic Significance and Societal Importance of the Research Achievements

これまで知られていた炎症がインスリン抵抗性を惹起するという知見に対し、そのメカニズムの1つであるS-ニトロソ化について着目して解析を行った。本研究ではGSNORというS-ニトロソ化を還元する酵素の1つに注目し、その機能を明らかとすることで、2型糖尿病に対する新たな治療戦略を提唱することが可能となると考えた。本研究では、GSNORには組織特異的な役割がある点を明らかにし、さらにその結果より肝臓と筋肉では反対に働くことが示唆された。今後、組織特異的に作用する薬の開発が進めば、新たな糖尿病治療薬としての標的となり得る。より体への負担の少ない薬の開発へのヒントとなると思われる。

Report

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

    (5 results)

All 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results)

  • [Int'l Joint Research] Harvard Medical School(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Harvard Medical School(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Harvard Medical School(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Coenzyme Q10 protects against burn-induced mitochondrial dysfunction and impaired insulin signaling in mouse skeletal muscle2019

    • Author(s)
      Nakazawa Harumasa、Ikeda Kazuhiro、Shinozaki Shohei、Yasuhara Shingo、Yu Yong-Ming、Martyn J.A. Jeevendra、Tompkins Ronald G.、Yorozu Tomoko、Inoue Satoshi、Kaneki Masao
    • Journal Title

      FEBS Open Bio

      Volume: 9 Issue: 2 Pages: 348-363

    • DOI

      10.1002/2211-5463.12580

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Oral intake of sulforaphane (broccoli sprouts) on androgen in middle aged male: a randomized, placebo-controlled, pilot trial2018

    • Author(s)
      Shohei Shinozaki
    • Organizer
      Japan Society for Biomedical Gerontology
    • Related Report
      2018 Research-status Report
    • Invited

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

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