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Elucidation of Circadian Clock Regulation Mechanisms for Resolution of Circadian Rhythm Sleep Disorders

Research Project

Project/Area Number 20K07282
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48020:Physiology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Minami Yoichi  東京大学, 大学院医学系研究科(医学部), 特任准教授 (40415310)

Co-Investigator(Kenkyū-buntansha) 重吉 康史  近畿大学, 医学部, 教授 (20275192)
久保 厚子  近畿大学, 医学部, 助教 (70647792)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords概日リズム / 体内時計 / VIP / 遺伝子改変ラット / 概日時計 / VIPR2 / ラット / 発光リズム / Vipr2 / 視交叉上核 / 位相前進 / 時差ボケ / ノックアウトラット / トランスジェニックラット / 睡眠障害
Outline of Research at the Start

概日リズム睡眠障害は体内時計よる睡眠・覚醒リズムの異常である。事前検討から、体内時計の発振能を減弱させた遺伝子改変ラットにおいて、活動開始時刻の前進・時差ボケの軽減を認めた。この結果に想を得て、独自に開発した遺伝子改変ラットを用い、組織レベル・行動レベルの概日リズムの解析を通じ、時差ボケの回復を早め、活動リズムの回復に関わる機構の解明に挑む。また、概日リズム障害の問題の解決法を案出する。

Outline of Final Research Achievements

This research project aimed to cancelation of circadian rhythm sleep disorders by regulating the circadian clock, and used rats with a circadian rhythm length similar to that of humans. In this study, (1) we evaluated entrainment ability to new light conditions using model animals (BMAL1-DN TG rats) having a dominant negative mutant of the clock gene BMAL1 as a transgene. In addition, (2) genetically engineered rats with a more severely impaired biological clock (Vipr2-deficient rats) were generated and their phenotype was analyzed. We showed that (1) the ability to entrain to a novel light environment can be enhanced by attenuating the robustness of the internal circadian clock, and (2) we succeeded in establishing a useful model animal for future circadian/sleep research.

Academic Significance and Societal Importance of the Research Achievements

本研究は概日リズムを弱めることで睡眠障害の1つである時差ぼけ(Jetlag)を解消する、すなわち新規環境への適応を早めることができることを動物実験で示した研究である。また、これまで有用性があるにも関わらず、体内時計障害モデルの開発が進んでいなかった動物種であるラットで、新規に概日リズムを大きく障害するモデルを開発することに成功したものである。前者は一時的に体内時計の機能を弱めることが却って体内時計調節に有用である可能性を示すものであり新規の視点を与える発見であった。後者は今後、学界の発展に大きく寄与すると期待できる成果であった。

Report

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

    (8 results)

All 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] The role of calcium and CaMKII in sleep2022

    • Author(s)
      Wang Yuyang、Minami Yoichi、Ode Koji L.、Ueda Hiroki R.
    • Journal Title

      Frontiers in Systems Neuroscience

      Volume: 16 Pages: 1059421-1059421

    • DOI

      10.3389/fnsys.2022.1059421

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High-throughput Genetically Modified Animal Experiments Achieved by Next-generation Mammalian Genetics2022

    • Author(s)
      Minami Yoichi、Yuan Yufei、Ueda Hiroki R.
    • Journal Title

      Journal of Biological Rhythms

      Volume: 37 Issue: 2 Pages: 135-151

    • DOI

      10.1177/07487304221075002

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Towards organism-level systems biology by next-generation genetics and whole-organ cell profiling2021

    • Author(s)
      Minami Yoichi、Yuan Yufei、Ueda Hiroki R.
    • Journal Title

      Biophysical Reviews

      Volume: 13 Issue: 6 Pages: 1113-1126

    • DOI

      10.1007/s12551-021-00859-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heavy Water Lengthens the Molecular Circadian Clock Period in the Suprachiasmatic Nucleus of Mice In Vitro2021

    • Author(s)
      Sujino Mitsugu、Koinuma Satoshi、Minami Yoichi、Shigeyoshi Yasufumi
    • Journal Title

      Journal of Biological Rhythms

      Volume: 36 Issue: 4 Pages: 410-418

    • DOI

      10.1177/07487304211012905

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Transgenic rats expressing dominant negative BMAL1 showed circadian clock amplitude reduction and rapid recovery from jet lag2021

    • Author(s)
      Minami Yoichi、Yoshikawa Tomoko、Nagano Mamoru、Koinuma Satoshi、Morimoto Tadamitsu、Fujioka Atsuko、Furukawa Keiichi、Ikegami Keisuke、Tatemizo Atsuhiro、Egawa Kentaro、Tamaru Teruya、Taniguchi Taizo、Shigeyoshi Yasufumi
    • Journal Title

      European Journal of Neuroscience

      Volume: 53 Issue: 6 Pages: 1783-1793

    • DOI

      10.1111/ejn.15085

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] cAMP response element induces Per1 in vivo.2020

    • Author(s)
      Ikegami K, Nakajima M, Minami Y, Nagano M, Masubuchi S, Shigeyoshi Y.
    • Journal Title

      Biochem Biophys Res Commun.

      Volume: 531 Issue: 4 Pages: 515-521

    • DOI

      10.1016/j.bbrc.2020.07.105

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The circadian phenotype of newly developed Vipr2 knock-out rats2022

    • Author(s)
      Minami Y, Nagano M, Koinuma S, Xie X, Kubo A, Morimoto T, Egawa K, Tatemizo A, Iigo M, and Shigeyoshi S.
    • Organizer
      第29回日本時間生物学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The circadian phenotype of newly developed Vipr2 knock-out rats.2022

    • Author(s)
      南陽一、長野護、鯉沼聡、謝肖男、久保厚子、森本宰充、飯郷雅之、江川賢太郎、立溝篤宏、重吉康史
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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