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Elucidation of a functional role of synaptic transmission in the central circadian clock, the suprachiasmatic nucleus

Research Project

Project/Area Number 21K06422
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionKanazawa University

Principal Investigator

Maejima Takashi  金沢大学, 医学系, 准教授 (70399319)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords概日リズム / 中枢時計 / 視交叉上核 / GABA作動性伝達 / 中枢概日時計 / シナプス伝達
Outline of Research at the Start

中枢概日時計として働く視交叉上核は、複数種のGABA神経により回路が形成されている。個々の神経は自律的なリズムを持つが、これらをまとめ回路全体として日長を符号化する電気的活動を生じる。本研究では、各々の神経タイプ間の接続について、シナプス伝達の機能的性質、伝達効率の日内変動、GABAに対する応答性及び電気シナプスの有無を電気生理学的に明らかにし、それらの接続がどのように神経活動の同調作用や日長の符号化に寄与するか解明する。

Outline of Final Research Achievements

We investigated the characteristic and functional role of GABA transmission from vasopressin-producing GABAergic neurons located in the dorsomedial region of the suprachiasmatic nucleus (SCN), which functions as a central clock for circadian rhythm formation. It has been revealed that the GABA release probability showed diurnal variation, which was high during the day and low at night. Furthermore, the GABA transmission has been shown to play a role in setting mouse's active and resting periods by restricting the neural activity in the SCN circuit to appropriate time windows of the circadian rhythm.

Academic Significance and Societal Importance of the Research Achievements

視交叉上核(SCN)におけるAVP産生神経細胞は、GABA伝達を介してSCN回路の神経活動を制御し、概日リズムにおける休息期と活動期の時間帯を設定するタイマー的な役割を果たすことが示された。この制御機構は、季節によって変化する昼夜の長さに合わせ、動物の体内時計を調節するSCNの回路機能と関連する。そのため、本研究で得られた知見は、季節性情動障害や概日リズム睡眠障害の予防と治療法の創出につながるものと期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2023 2022

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (1 results)

  • [Journal Article] In vivo recording of suprachiasmatic nucleus dynamics reveals a dominant role of arginine vasopressin neurons in circadian pacesetting2023

    • Author(s)
      Tsuno Yusuke、Peng Yubo、Horike Shin-ichi、Wang Mohan、Matsui Ayako、Yamagata Kanato、Sugiyama Mizuki、Nakamura Takahiro J.、Daikoku Takiko、Maejima Takashi、Mieda Michihiro
    • Journal Title

      PLOS Biology

      Volume: 21 Issue: 8 Pages: e3002281-e3002281

    • DOI

      10.1371/journal.pbio.3002281

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Action sequence learning is impaired in genetically modified mice with the suppressed GABAergic transmission from the thalamic reticular nucleus to the thalamus2023

    • Author(s)
      Takako Ohno-Shosaku , Mitsugu Yoneda , Takashi Maejima , Mohan Wang , Yui Kikuchi , Kaito Onodera , Yuji Kanazawa , Chitoshi Takayama , Michihiro Mieda
    • Journal Title

      Neuroscience

      Volume: 532 Pages: 87-102

    • DOI

      10.1016/j.neuroscience.2023.09.019

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] In vivo recording of the circadian calcium rhythm in Prokineticin 2 neurons of the suprachiasmatic nucleus2023

    • Author(s)
      Onodera Kaito、Tsuno Yusuke、Hiraoka Yuichi、Tanaka Kohichi、Maejima Takashi、Mieda Michihiro
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 16974-16974

    • DOI

      10.1038/s41598-023-44282-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Paraventricular hypothalamic vasopressin neurons induce self-grooming in mice2022

    • Author(s)
      Islam Md Tarikul、Maejima Takashi、Matsui Ayako、Mieda Michihiro
    • Journal Title

      Molecular Brain

      Volume: 15 Issue: 1 Pages: 47-47

    • DOI

      10.1186/s13041-022-00932-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vasopressin neurons in the paraventricular hypothalamus promote wakefulness via lateral hypothalamic orexin neurons2022

    • Author(s)
      Islam Md Tarikul、Rumpf Florian、Tsuno Yusuke、Kodani Shota、Sakurai Takeshi、Matsui Ayako、Maejima Takashi、Mieda Michihiro
    • Journal Title

      Current Biology

      Volume: 32 Issue: 18 Pages: 3871-3885

    • DOI

      10.1016/j.cub.2022.07.020

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Isolation of ferret astrocytes reveals their morphological, transcriptional, and functional differences from mouse astrocytes2022

    • Author(s)
      Roboon Jureepon、Hattori Tsuyoshi、Nguyen Dinh Thi、Ishii Hiroshi、Takarada-Iemata Mika、Kannon Takayuki、Hosomichi Kazuyoshi、Maejima Takashi、Saito Kengo、Shinmyo Yohei、Mieda Michihiro、Tajima Atsushi、Kawasaki Hiroshi、Hori Osamu
    • Journal Title

      Frontiers in Cellular Neuroscience

      Volume: 16 Pages: 1-15

    • DOI

      10.3389/fncel.2022.877131

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] AVP neurons act as the primary circadian pacesetter cells in vivo2022

    • Author(s)
      Tsuno Yusuke、Peng Yubo、Horike Shin-ichi、Yamagata Kanato、Sugiyama Mizuki、Nakamura Takahiro J.、Daikoku Takiko、Maejima Takashi、Mieda Michihiro
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.08.04.502742

    • Related Report
      2022 Research-status Report
  • [Presentation] 視交叉上核におけるバゾプレッシン産生細胞のGABA作動性神経伝達により中枢概日時計は動物の行動する時間帯を設定する2022

    • Author(s)
      前島隆司、津野祐輔、宮崎翔太、恒岡洋右、長谷川恵美、イスラムタリクル、榎木亮介、中村孝博、三枝理博
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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