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Neuronal circuit for sedative/hypnotic actions of alpha-2 adrenergic agonist

Research Project

Project/Area Number 21K20699
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0704:Neuroscience, brain sciences, and related fields
Research InstitutionToho University

Principal Investigator

Yamagata Tomoko  東邦大学, 医学部, 助教 (90584433)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords睡眠 / 鎮静 / α2作動薬 / デクスメデトミジン / マウス / アドレナリンα2受容体
Outline of Research at the Start

デクスメデトミジンは鎮静薬として広く用いられている。しかし、深いノンレム睡眠(ステージ2ないし3)に近い脳波が現れること、睡眠のように脳のクリアランス作用(老廃物除去作用)があることから、睡眠機能を阻害せずにねむりを促すことができる睡眠薬として期待できる。本研究は、α2作動性鎮静薬であるデクスメデトミジンの作用機序を、薬理遺伝学・光遺伝学的に、神経回路レベルから解明することを目指している。

Outline of Final Research Achievements

Dexmedetomidine, an alpha 2 agonist, is widely used in clinical practice as a pre- and post-operative sedative, but it remains unclear how it exerts its sedative effects and why it induces deep non-REM sleep-like EEG and inhibits REM sleep. To this end, this study aimed to elucidate the neuronal mechanism of sedation by dexmedetomidine (DEX), an adrenergic α2-receptor agonist, using pharmacogenetic and photogenetic methods. By using a genetical method to visualize specific neuronal cell populations in an activity-dependent manner (TRAP), we identified cell populations that are activated by DEX. We further manipulated those cell populations pharmacogenetically and optogenetically and examined the causal role of those cells on sedation and sleep/arousal.

Academic Significance and Societal Importance of the Research Achievements

α2作動薬のデクスメデトミジンは、術前・術後の鎮静薬として臨床の場でひろく使われているが、どのように鎮静作用が出現するのか、また、なぜこの薬による鎮静が深いノンレム睡眠様の脳波を誘発し、かつレム睡眠を抑制するかは不明なままである。本研究は、鎮静時に活性化される神経回路についてその睡眠・覚醒への役割を検証した。鎮静と睡眠・覚醒の神経基盤について明らかにしたという点で、学術的に意義がある。

Report

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

    (9 results)

All 2022 2021 Other

All Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 4 results,  Open Access: 5 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Journal Article] Intracellular chloride regulation mediates local sleep pressure in the cortex2022

    • Author(s)
      Hannah Alfonsa, Richard J. Burman, Paul J. N. Brodersen, Sarah E. Newey, Kashif Mahfooz, Tomoko Yamagata, Marios C. Panayi, David M. Bannerman, Vladyslav V. Vyazovskiy, Colin J. Akerman
    • Journal Title

      Nature Neuroscience

      Volume: 26 Issue: 1 Pages: 64-78

    • DOI

      10.1038/s41593-022-01214-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The hypothalamic link between arousal and sleep homeostasis in mice2021

    • Author(s)
      Tomoko Yamagata, Martin C. Kahn, Jose Prius-Mengual, Elise Meijer, Merima Sabanovic, Mathilde C. C. Guillaumin, Vincent van der Vinne, Yi-Ge Huang, Laura E. McKillop, Aarti Jagannath, Stuart N Peirson, Edward O. Mann, Russell G. Foster, and Vladyslav V. Vyazovskiy
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 51

    • DOI

      10.1073/pnas.2101580118

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A role for the cortex in sleep-wake regulation2021

    • Author(s)
      Lukas B. Krone, Tomoko Yamagata, Cristina Blanco-Duque, Mathilde C. C. Guillaumin, Martin C. Kahn, Vincent van der Vinne, Laura E. McKillop, Shu K. E. Tam, Stuart N. Peirson, Colin J. Akerman, Anna Hoerder-Suabedissen, Zoltan Molner, Vladyslav V. Vyazovskiy
    • Journal Title

      Nature Neuroscience

      Volume: 24 Issue: 9 Pages: 1210-1215

    • DOI

      10.1038/s41593-021-00894-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intraneuronal chloride levels encode tiredness in cortex2021

    • Author(s)
      Hannah Alfonsa, Paul Brodersen, Sarah E. Newey, Tomoko Yamagata, Marios C. Panayi, David M. Bannerman, Vladyslav V. Vyazovskiy, Colin J. Akerman
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2021.05.14.444189

    • Related Report
      2021 Research-status Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Waking experience modulates sleep need in mice2021

    • Author(s)
      Linus Milinski, Simon P. Fisher, Nanyi Cui, Laura E. McKillop, Cristina Blanco-Duque, Gauri Ang, Tomoko Yamagata, David M. Bannerman, Vladyslav V. Vyazovskiy
    • Journal Title

      BMC Biology

      Volume: 19 Issue: 1

    • DOI

      10.1186/s12915-021-00982-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Somnotate: An accurate, robust, and flexible sleep stage classifier for the experimentalist2021

    • Author(s)
      Paul J. N. Brodersen, Hannah Alfonsa, Lukas B. Krone, Cristina Blanco Duque, Angus S. Fisk, Sarah J. Flaherty, Mathilde C. C. Guillaumin, Yi-Ge Huang, Martin C. Kahn, Laura E. McKillop, Linus Milinski, Lewis Taylor, Christopher W. Thomas, Tomoko Yamagata, Russell G. Foster, Vladyslav V. Vyazovskiy, Colin J. Akerman
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2021.10.06.463356

    • Related Report
      2021 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] Rapid state reversibility from deep dexmedetomidine sedation induced by photoactivation of lateral preoptic GAD2 neurons in mice2021

    • Author(s)
      Tomoko Yamagata, Stuart N. Peirson, Edward O. Mann, Russell G. Foster, Vladyslav V. Vyazovskiy
    • Organizer
      SfN2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] Toho University Department of Anatomy

    • URL

      https://www.toho-funatolab.jp/

    • Related Report
      2021 Research-status Report
  • [Remarks] 理研CBS 思考・実行機能研究チーム

    • URL

      https://www.kentaromiyamoto-lab.com/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-10-22   Modified: 2024-01-30  

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