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Regulation of energy metabolism by non-image forming photic responses

Research Project

Project/Area Number 19K22693
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research InstitutionNagoya University (2020)
Keio University (2019)

Principal Investigator

Hatori Megumi  名古屋大学, トランスフォーマティブ生命分子研究所, 特任准教授 (90590472)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords概日時計 / 目 / メラノプシン / 非視覚応答 / 光受容体 / CRY / 哺乳類 / 概日リズム
Outline of Research at the Start

生物は睡眠・覚醒や体温、代謝など、一日周期で様々な生体反応を示す。それらの概日リズムを制御する体内時計が概日時計である。概日時計の周期は正確に24時間ではない。そのため哺乳類の概日時計システムは、外界環境からの刺激を利用して日々の時刻のずれの補正を行っている。最も重要な時計調節因子は、光と食事である。本研究では両因子がいかに相互作用して生体の恒常性維持に寄与するかの解明を目指す。

Outline of Final Research Achievements

In mammalian retinas, there are three photoreceptors: rods, cones and melanopsin-expressing retinal ganglion cells. Rods and cones are responsible for image forming vision. In contrast, melanopsin-expressing retinal ganglion cells contribute to non-image forming visions, such as circadian photoentrainment and pupil constriction. Melanopsin is a GPCR which can be activated by 460-480 nm light, and its light response properties are different from those of rods and cones. I am investigating how light affects the whole-body physiologies and the circadian clock system.
CRY1 and CRY2 are essential components of the mammalian circadian clock controlling daily physiological rhythms. By using knockout mice and isoform-selective compounds, we found a new role of CRY1 and CRY2 as enhancers of brown adipocyte differentiation, providing the basis of CRY-mediated regulation of energy expenditure.

Academic Significance and Societal Importance of the Research Achievements

わたしたちの睡眠・覚醒やホルモン分泌など、様々な生理機能は一日を周期として変化し、日々繰り返されます。このリズムを制御しているのが体内に存在する生物時計である概日時計です。概日時計の周期は24時間ぴったりではないため、光を浴びることや食事を摂取することにより、時間のずれを毎日補正しています。今回、概日時計の発振に重要な機能を持つ時計タンパク質が脂肪細胞においても役割を持つことを明らかにしました。また、目に発現して青色光を感じる光受容タンパク質の機能解析を行いました。これらの研究を発展させることにより、生体機能の維持および健康の増進の一助となると期待されます。

Report

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

    (7 results)

All 2021 2020 2019

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

  • [Journal Article] 時間制限摂食と肥満症治療2021

    • Author(s)
      羽鳥 恵
    • Journal Title

      実験医学

      Volume: 39 Pages: 214-218

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Isoform-selective regulation of mammalian cryptochromes2020

    • Author(s)
      Miller Simon、Son You Lee、Aikawa Yoshiki、Makino Eri、Nagai Yoshiko、Srivastava Ashutosh、Oshima Tsuyoshi、Sugiyama Akiko、Hara Aya、Abe Kazuhiro、Hirata Kunio、Oishi Shinya、Hagihara Shinya、Sato Ayato、Tama Florence、Itami Kenichiro、Kay Steve A.、Hatori Megumi、Hirota Tsuyoshi
    • Journal Title

      Nature Chemical Biology

      Volume: - Issue: 6 Pages: 676-685

    • DOI

      10.1038/s41589-020-0505-1

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Synaptic Specializations of Melanopsin-Retinal Ganglion Cells in Multiple Brain Regions Revealed by Genetic Label for Light and Electron Microscopy2019

    • Author(s)
      Kim Keun-Young、Rios Luis C.、Le Hiep、Perez Alex J.、Phan S?bastien、Bushong Eric A.、Deerinck Thomas J.、Liu Yu Hsin、Ellisman Maya A.、Lev-Ram Varda、Ju Suyeon、Panda Sneha A.、Yoon Sanghee、Hirayama Masatoshi、Mure Ludovic S.、Hatori Megumi、Ellisman Mark H.、Panda Satchidananda
    • Journal Title

      Cell Reports

      Volume: 29 Issue: 3 Pages: 628-644

    • DOI

      10.1016/j.celrep.2019.09.006

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 第三の光受容細胞2019

    • Author(s)
      羽鳥 恵
    • Journal Title

      Clinical Neuroscience

      Volume: 37 Pages: 1455-1458

    • Related Report
      2019 Research-status Report
  • [Presentation] Regulation of the energy metabolism by controlling the circadian clock2020

    • Author(s)
      羽鳥 恵
    • Organizer
      第43回 日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Book] 医学のあゆみBOOKS アンチエイジング診療 23のエッセンス2019

    • Author(s)
      堀江 重郎
    • Total Pages
      152
    • Publisher
      医歯薬出版
    • Related Report
      2019 Research-status Report
  • [Book] 診療で役立つ! 近視進行予防のサイエンス2019

    • Author(s)
      坪田 一男
    • Total Pages
      192
    • Publisher
      金原出版
    • ISBN
      4307351711
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2022-01-27  

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