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Why is the circadian rhythm center composed of GABAergic neurons?

Research Project

Project/Area Number 20H03425
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48020:Physiology-related
Research InstitutionNational Institutes of Natural Sciences

Principal Investigator

Enoki Ryosuke  大学共同利用機関法人自然科学研究機構(機構直轄研究施設), 生命創成探究センター, 准教授 (00528341)

Co-Investigator(Kenkyū-buntansha) 江川 潔  北海道大学, 医学研究院, 助教 (40450829)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords概日時計 / 視交叉上核 / イメージング / 神経細胞 / GABA / 概日リズム / 塩素イオン / 生物時計 / 光イメージング / クロライドイオン / 神経ネットワーク / カルシウム / クロライド / 神経回路
Outline of Research at the Start

私たち哺乳類の概日リズムの中枢は、脳深部にある小さな神経核(視交叉上核)に局在し、他の脳領域や全身にリズム情報を発振して、睡眠覚醒サイクルやホルモン分泌などの約24時間の生理機能を制御している。視交叉上核は約2万個のGABA作動性の神経細胞により構成されるが、「なぜ概日リズム中枢はGABA作動性神経細胞から構成されるのか?」という根源的な問いに対して私達は明確な回答を持ち合わせていない。本研究では、これまで申請者が開発してきた長期/多機能の光イメージング計測を用い、GABA作動性神経細胞が「いつ・どこで・どのように」働くのかを明らかし、概日リズム中枢の神経回路の作動原理を理解することを目指す。

Outline of Final Research Achievements

The research was conducted to elucidate the physiological significance and mechanisms of GABAergic neurons in the master clock neurons, the suprachiasmatic nucleus, using optical imaging techniques. Intracellular chloride ion is the main factor that determines the direction of GABAergic excitatory-inhibitory responses, and circadian fluctuations in chloride concentration in the suprachiasmatic nucleus are thought to cause a switch between excitatory and inhibitory responses. Our imaging studies have allowed us to observe 24-hour rhythms of chloride ion concentrations at the neuronal network level and to observe spatially characteristic rhythmic phase patterns.

Academic Significance and Societal Importance of the Research Achievements

概日時計のリズム発振メカニズムを解明する上で、視交叉上核ネットワークの作動原理を理解することは重要であり、本研究は学術的に意義があると考える。また、様々な細胞機能への超長期イメージング計測の展開という、計測技術としても領域の広がりを示すものであり、今後の更なる発展が期待できる。さらには、現代社会では概日リズムが乱れる事による心身の不調が問題になっており、概日時計のリズム発振の基本原理を解明することは、社会的にも意義があると考える。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (49 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (11 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 7 results) Presentation (35 results) (of which Int'l Joint Research: 8 results,  Invited: 16 results) Remarks (3 results)

  • [Journal Article] Multibeam continuous axial scanning two-photon microscopy for in vivo volumetric imaging in mouse brain2024

    • Author(s)
      Ataka Mitsutoshi、Otomo Kohei、Enoki Ryosuke、Ishii Hirokazu、Tsutsumi Motosuke、Kozawa Yuichi、Sato Shunichi、Nemoto Tomomi
    • Journal Title

      Biomedical Optics Express

      Volume: 15 Issue: 2 Pages: 1089-1089

    • DOI

      10.1364/boe.514826

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] In-phasic cytosolic-nuclear Ca2+ rhythms in suprachiasmatic nucleus neurons2023

    • Author(s)
      Sota Hiro、Kenta Kobayashi、Tomomi Nemoto、Ryosuke Enoki
    • Journal Title

      Frontiers in Neuroscience

      Volume: 17

    • DOI

      10.3389/fnins.2023.1323565

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cold-induced Suspension and Resetting of Ca2+ and Transcriptional Rhythms in the Suprachiasmatic Nucleus Neurons.2023

    • Author(s)
      Ryosuke Enoki、Naohiro Kon、Kimiko Shimizu、Kenta Kobayashi、Sota Hiro、Ching-Pu Chang、Tatsuto Nakane、Hirokazu Ishii、Joe Sakamoto、Yoshifumi Yamaguchi、Tomomi Nemoto
    • Journal Title

      iScience

      Volume: 26(12) Issue: 12 Pages: 108390-108390

    • DOI

      10.1016/j.isci.2023.108390

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 極低温下における概日時計中枢のリズム発振機構2023

    • Author(s)
      榎木亮介, 根本知己
    • Journal Title

      月刊「細胞」

      Volume: 55 Pages: 32-35

    • Related Report
      2023 Annual Research Report
  • [Journal Article] 概日時計の温度補償性とCa2+シグナルの役割2023

    • Author(s)
      金尚宏、榎木亮介
    • Journal Title

      低温科学・特集「動物の寒冷適応戦略」

      Volume: 81 Pages: 1-9

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Cold-induced Suspension and Resetting of Ca2+ and Transcriptional Rhythms in the Suprachiasmatic Nucleus Neurons2022

    • Author(s)
      Enoki Ryosuke、Kon Naohiro、Shimizu Kimiko、Kobayashi Kenta、Yamaguchi Yoshifumi、Tomomi Nemoto
    • Journal Title

      Biorxiv

      Volume: -

    • DOI

      10.1101/2022.09.18.508357

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Calcium Rhythm in Mammalian Master Clock2022

    • Author(s)
      ENOKI Ryosuke
    • Journal Title

      Seibutsu Butsuri

      Volume: 62 Issue: 4 Pages: 228-231

    • DOI

      10.2142/biophys.62.228

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Na+/Ca2+ exchanger mediates cold Ca2+ signaling conserved for temperature-compensated circadian rhythms2021

    • Author(s)
      Kon Naohiro、Wang Hsin-tzu、Kato Yoshiaki S.、Uemoto Kyouhei、Kawamoto Naohiro、Kawasaki Koji、Enoki Ryosuke、Kurosawa Gen、Nakane Tatsuto、Sugiyama Yasunori、Tagashira Hideaki、Endo Motomu、Iwasaki Hideo、Iwamoto Takahiro、Kume Kazuhiko、Fukada Yoshitaka
    • Journal Title

      Science Advances

      Volume: 7 Issue: 18 Pages: 1-12

    • DOI

      10.1126/sciadv.abe8132

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] GABA from vasopressin neurons regulates the time at which suprachiasmatic nucleus molecular clocks enable circadian behavior2021

    • Author(s)
      Maejima Takashi、Tsuno Yusuke、Miyazaki Shota、Tsuneoka Yousuke、Hasegawa Emi、Islam Md Tarikul、Enoki Ryosuke、Nakamura Takahiro J.、Mieda Michihiro
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 6 Pages: 1-18

    • DOI

      10.1073/pnas.2010168118

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 哺乳類のウルトラディアンカルシウムリズムの生成機構2020

    • Author(s)
      榎木亮介
    • Journal Title

      月刊「細胞」

      Volume: 558 Pages: 34-37

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 概日リズムより短い周期の体内時計:ウルトラディアンリズム2020

    • Author(s)
      榎木亮介
    • Journal Title

      Annual Review神経2020

      Volume: - Pages: 9-15

    • Related Report
      2020 Annual Research Report
  • [Presentation] 概日時計-冬眠の研究に欲しい光イメージング計測技術2024

    • Author(s)
      榎木亮介
    • Organizer
      先端光技術を基軸としたバイオイメージング研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Circadian Clock under Extreme Cold Environment2024

    • Author(s)
      Ryosuke Enoki
    • Organizer
      McGill-NIPS Joint Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Circadian Rhythms in the Master Clock Neurons under Extreme Cold Temperature2024

    • Author(s)
      Ryosuke Enoki
    • Organizer
      Invited Seminar in Elena Gracheva's lab, Yale University
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Circadian Rhythms in the Master Clock Neurons under Extreme Cold Temperature2024

    • Author(s)
      Ryosuke Enoki
    • Organizer
      Invited Seminar in Rae Silver's lab, Columbia University
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 極低温環境下における概日リズム発振機構2023

    • Author(s)
      榎木亮介
    • Organizer
      生理研研究会「極限環境適応」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 時を刻む脳-生命が時を刻む仕組み-2023

    • Author(s)
      榎木亮介
    • Organizer
      静岡県立大学大学院 大学院講義/公開セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 極低温環境下における概日リズム発振機構2023

    • Author(s)
      榎木亮介
    • Organizer
      冬眠休眠研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 極低温環境下における概日リズム発振機構2023

    • Author(s)
      榎木亮介
    • Organizer
      生理学研究所研究会「細胞システム理解のためのシグナル応答原理解明の最前線」
    • Related Report
      2023 Annual Research Report
  • [Presentation] Circadian Rhythms under Extreme Cold Temperature in the Master Clock Neurons2023

    • Author(s)
      RyosukE Enoki
    • Organizer
      国際先導研究リトリート
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 視交叉上核の神経細胞における細胞内カルシウムおよび時計遺伝子転写のリズムは低温により停止しリセットする2023

    • Author(s)
      榎木 亮介, 金 尚宏, 山口 良文, 根本 知己
    • Organizer
      The 46th Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2023 Annual Research Report
  • [Presentation] Circadian Rhythms under Cold Temperature in the Master Clock Neurons2023

    • Author(s)
      Ryosuke Enoki
    • Organizer
      Washington University St.Louis, Sleep & Clock Seminar
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Long-term imaging of organellar rhythms in the suprachiasmatic nucleus neurons2023

    • Author(s)
      Sota Hiro, Tomomi Nemoto, Ryosuke Enoki
    • Organizer
      Gordon Research Conference Chronobiology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cold-induced Suspension and Resetting of Ca2+ and Transcriptional Rhythms in the Suprachiasmatic Nucleus Neurons2023

    • Author(s)
      Ryosuke Enoki, Naohiro Kon, Yoshifumi Yamaguchi, Tomomi Nemoto
    • Organizer
      Gordon Research Conference Chronobiology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Circadian Rhythms under Cold Remperature in the Master Clock Neurons2023

    • Author(s)
      榎木亮介, 金尚宏, 山口良文, 根本知己
    • Organizer
      日本生理学会 第100回記念大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Identification of uncoupling protein 1 (UCP1) in the hypothalamus of Syrian hamster brain2023

    • Author(s)
      張菁圃, 山口良文, 渡邊正知, 根本知己, 榎木亮介
    • Organizer
      日本生理学会 第100回記念大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A temperature-dependent diabetes-like metabolic state regulated by QIH2023

    • Author(s)
      李明亮, 張菁圃, 根本知己, 榎木亮介
    • Organizer
      日本生理学会 第100回記念大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 極低温環境下における概日リズム発振機構2022

    • Author(s)
      榎木亮介, 金尚宏, 山口良文, 根本知己
    • Organizer
      BIOTHERMOLOGY WORKSHOP 2022 & 温度生物学若手の会 合同シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 視交叉上核の神経細胞における細胞内カルシウムおよび時計遺伝子転写のリズムは低温により停止しリセットする2022

    • Author(s)
      榎木亮介, 金尚宏, 清水貴美子, 小林憲太, 山口良文, 根本知己
    • Organizer
      第29回 時間生物学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 極低温環境下における概日リズム発振機構2022

    • Author(s)
      榎木亮介, 金尚宏, 山口良文, 根本知己
    • Organizer
      第2回生理研研究会「極限環境適応」
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 低温環境下における概日時計中枢のリズム発振機構2022

    • Author(s)
      榎木亮介, 金尚宏, 山口良文, 根本知己
    • Organizer
      温熱研究会2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] An easy-to-use light-needle creating device for single scan volumetric imaging in thick tissue specimens2022

    • Author(s)
      CHANG Ching-Pu, Kohei OTOMO, Yuichi KOZAWA, Hirokazu ISHII, Miwako YAMASAKI, Masahiko WATANABE, Shunichi SATO, Ryosuke ENOKI, Tomomi NEMOTO
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Optical recording of mitochondrial Ca2+ dynamics in the central circadian clock2022

    • Author(s)
      廣蒼太, 根本知己, 榎木亮介
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 多点走査型2光子顕微鏡を用いた生体脳ボリュームCa2+イメージング2022

    • Author(s)
      安宅光倫, 大友康平, 榎木亮介, 根本知己
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] High-speed imaging of calcium elevations and glutamate release under Aβ oligomers exposure in primary cultured astrocytes2022

    • Author(s)
      中田開人, 大友康平, 石井宏和, 堤元佐, 榎木亮介, 根本知己
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] In vivo calcium imaging reveals neuronal glucose-sensing regulated by body energy status2022

    • Author(s)
      LEE Ming-Liang, CHANG Ching-Pu, NEMOTO Tomomi, ENOKI Ryosuke
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 概日時計中枢におけるミトコンドリアCa2+濃度動態の光計測2022

    • Author(s)
      廣蒼太, 根本知己, 榎木亮介
    • Organizer
      冬眠休眠研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] In vivo calcium imaging reveals dynamic neuronal glucose-sensing in the ventromedial hypothalamus2022

    • Author(s)
      Ming-Liang LEE, Ching Pu CHANG, Tomomi NEMOTO, Ryosuke ENOKI
    • Organizer
      冬眠休眠研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 概日カルシウムリズムの源流を探る2021

    • Author(s)
      榎木亮介, 廣蒼太, 根本知己
    • Organizer
      生理研研究会「細胞システム理解のためのシグナル応答原理解明の最前線」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] マイクロパターン基盤上に培養した単一神経細胞における概日時計の光イメージング解析2021

    • Author(s)
      榎木亮介, 平田 快洋, 繁富-栗林 香織
    • Organizer
      日本機械学会 2021年度年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Exploring the origin of circadian calcium rhythms in the master clock in mammals2021

    • Author(s)
      Ryosuke Enoki
    • Organizer
      Asia Forum on Chronobiology
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Visualizing Neuronal Circuits Controlling Circadian and Ultradian Ca2+ Rhythms in Mammals2021

    • Author(s)
      榎木亮介
    • Organizer
      第10回 生理研―霊長研―新潟脳研 合同シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Visualizing Neuronal Circuits Controlling Circadian and Ultradian Ca2+ Rhythms in Mammals2021

    • Author(s)
      榎木亮介
    • Organizer
      第10回 生理研―霊長研―新潟脳研 合同シンポジウム 2021年3月13日
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 概日時計中枢における核-細胞質カルシウム動態の長期イメージング解析2020

    • Author(s)
      廣蒼太, 根本知己, 榎木亮介
    • Organizer
      第29回日本バイオイメージング学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 光イメージング計測で紐解く生物時計中枢神経回路の作動原理2020

    • Author(s)
      榎木亮介、廣蒼太、根本知己
    • Organizer
      第10回名大生理研合同シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 多機能イメージング計測から迫る概日リズム中枢神経回路の作動原理2020

    • Author(s)
      榎木亮介, 廣蒼太, 根本知己
    • Organizer
      細胞システム理解のためのシグナル応答原理解明の最前線
    • Related Report
      2020 Annual Research Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/enoki

    • Related Report
      2023 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 個人ページ

    • URL

      https://ryosukeenoki.wixsite.com/enoki

    • Related Report
      2023 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 個人研究紹介HP

    • URL

      https://ryosukeenoki.wixsite.com/enoki

    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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