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The molecular mechanisms of active hypometabolism

Planned Research

Project AreaMammalian hibernation biology ~ survival strategies via hypometabolism and hypothermia
Project/Area Number 20H05767
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (III)
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Sunagawa Genshiro  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (70710250)

Co-Investigator(Kenkyū-buntansha) 清成 寛  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (40721048)
Project Period (FY) 2020-10-02 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥39,780,000 (Direct Cost: ¥30,600,000、Indirect Cost: ¥9,180,000)
Fiscal Year 2022: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2021: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2020: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Keywords冬眠 / 休眠 / 遺伝子改変ハムスター / 低代謝耐性 / 低温耐性 / 日内休眠 / ハムスター / QIH / 能動的低代謝
Outline of Research at the Start

哺乳類には冬眠(数ヶ月)や日内休眠(数時間)などの休眠状態(能動的低代謝)となる種が存在する。休眠中は少ない酸素消費量でも生存可能な省エネ状態だが、その原理はほとんど分かっていない。本研究では冬眠様状態を誘導できるマウスを駆使し、省エネ機構の重要因子をあぶり出し、遺伝子改変動物でin vivo/in vitroの代謝解析を通して省エネ機構の分子ネットワークを明らかにする。

Outline of Final Research Achievements

The goal of this project was to elucidate the principles of energy conservation mechanisms during hibernation using mice exhibiting hibernation-like states, aiming to decipher the molecular networks that enable mammals' hibernation. Firstly, using a hibernation-like model mouse, differences in gene expression during hibernation and under normal conditions were observed in multiple organs, and a list of genes related to the control of the hibernation energy-saving mechanism was compiled. Next, to verify whether these genes actually contribute causally to the energy-saving mechanism, Cas9 protein and gRNA were directly introduced into the fertilized eggs of Qrfp(cre/+) mice, and the relevant gene knockout (KO) mice were created to observe the hibernation-like state phenotype. Furthermore, in order to verify the importance of these relevant genes in seasonal hibernation, the development of gene modification techniques for hamsters was carried out.

Academic Significance and Societal Importance of the Research Achievements

本成果の学術的意義は、冬眠様モデルマウスを用いることで、季節性の冬眠動物では実現が難しい低代謝だが体温は高い状態、すなわち「温かい冬眠状態」を研究対象にしたことである。このアプローチにより、今後、これまでの冬眠動物の研究からは見出すことができなかった、休眠の省エネ機構に注目した遺伝子などが見つかることが期待される。本研究は基礎研究であるため、社会的意義を直ちに見出すことは難しい。しかし、休眠省エネ機構の理解の先には、人間を含めた冬眠をしない動物を冬眠させることで臨床を高品位化し、実生活をより豊かにすることが見込まれているため、長い目で見たときに本研究は大きな社会的意義を持つ可能性は十分にある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (14 results)

All 2023 2022 2021 2020

All Journal Article (1 results) Presentation (13 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] 休眠とその医学応用可能性2020

    • Author(s)
      砂川玄志郎
    • Journal Title

      実験医学

      Volume: 6 Pages: 978-981

    • Related Report
      2020 Annual Research Report
  • [Presentation] A warm hibernation can protect organs from ischemia2023

    • Author(s)
      Genshiro A. Sunagawa, Hidetoshi Masumoto
    • Organizer
      第100回日本生理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Warm hibernation enabled: revolutionizing hibernation research with QIH2023

    • Author(s)
      Genshiro A. Sunagawa, Hidetoshi Masumoto
    • Organizer
      BDR Symposium 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Can we hibernate? ― R&D toward synthetic hibernation for humans.2022

    • Author(s)
      Genshiro A. Sunagawa
    • Organizer
      第2回Workshop on Nobel Turing Challenge
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Toward clinical application of torpor2022

    • Author(s)
      Genshiro A. Sunagawa
    • Organizer
      第48回神経内分泌学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] QRFP産生ニューロンからはじまるマウスの冬眠様状態2022

    • Author(s)
      Genshiro A. Sunagawa
    • Organizer
      日本動物学会 第93回 早稲田大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 冬眠と睡眠の相違2022

    • Author(s)
      Genshiro A. Sunagawa
    • Organizer
      日本睡眠学会第47回定期学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Can torpor delay disease progression?2022

    • Author(s)
      砂川 玄志郎
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Can torpor delay disease progression?2022

    • Author(s)
      砂川 玄志郎
    • Organizer
      第44回 分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 人工冬眠へ向けて; 非冬眠動物における冬眠様状態の誘導2021

    • Author(s)
      砂川 玄志郎
    • Organizer
      日本宇宙生物科学会第35回大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The physiological aspects of Q neurons-induced hypometabolism (QIH)2021

    • Author(s)
      砂川 玄志郎
    • Organizer
      The 16th International Hibernation Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A hibernation-like condition in mice: the physiological aspects of Q neurons-induced hypometabolism.2020

    • Author(s)
      砂川 玄志郎
    • Organizer
      第43回 分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 冷たいことには理由がある ~冬眠から考える人類の未来~2020

    • Author(s)
      砂川 玄志郎
    • Organizer
      日本神経科学大会 市民公開パネルディスカッション「2050年の脳科学と社会」
    • Related Report
      2020 Annual Research Report
  • [Presentation] A discrete neuronal circuit induces a hibernation-like state in rodents2020

    • Author(s)
      砂川 玄志郎
    • Organizer
      Hibernation Symposium
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-10-30   Modified: 2024-01-30  

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