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The effect of behavioral fear expression on sleep/wake architecture

Research Project

Project/Area Number 18K15345
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 51020:Cognitive and brain science-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Soya Shingo  筑波大学, 国際統合睡眠医科学研究機構, 助教 (90791442)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsオレキシン / 恐怖 / 睡眠 / 過覚醒 / 恐怖記憶 / PTSD / 情動記憶
Outline of Final Research Achievements

In this project, we found that orexin modulates dopaminergic and serotonergic neurons via OX1R signaling to control fear memory consolidation and behavioral fear expression. Considering the previous studies, OX1R signaling in monoaminergic neurons might play a important role in fear-induced hyper-arousal and modulation of fear expression. Moreover, OX1RKO mice which showed decreased fear expression didn't show hyper-arousal phenotype induced by fearful stimuli. Therefore, hyper-arousal and increased fear expression induced in fearful situation might be regulated by increased monoaminergic tone via excitatory OX1R signaling.

Academic Significance and Societal Importance of the Research Achievements

PTSD患者においては睡眠障害が併発することが知られている。過度な覚醒や恐怖による睡眠障害において、覚醒の維持に関わるオレキシンとその下流の神経回路の役割が明らかになれば不眠を引き起こす神経基盤の解明に寄与できる。本研究では、モノアミンニューロンに発現するOX1Rが恐怖応答の調節に関与し、OX1Rの欠損による恐怖応答の減弱はその後の過覚醒時間を減少させることが明らかになった。このことから、オレキシンは覚醒および恐怖応答の強弱を調節し、オレキシンシステムの過剰な興奮が恐怖による睡眠障害の作用機序の一つであるとともに、OX1R選択的拮抗薬により過度な恐怖応答および覚醒を抑制できる可能性が示された。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 Other

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

  • [Journal Article] 特集 睡眠の制御と機能 睡眠覚醒における神経ペプチドの役割2020

    • Author(s)
      征矢 晋吾、櫻井 武
    • Journal Title

      生体の科学

      Volume: 71 Issue: 1 Pages: 8-12

    • DOI

      10.11477/mf.2425201109

    • ISSN
      0370-9531, 1883-5503
    • Year and Date
      2020-02-15
    • Related Report
      2019 Annual Research Report
  • [Journal Article] Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice2019

    • Author(s)
      Shota Kodani, Shingo Soya, Takeshi Sakurai
    • Journal Title

      Journal of visualized experiments (JoVE)

      Volume: 148 Issue: 148

    • DOI

      10.3791/58613

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Orexin as a modulator of fear-related behavior: Hypothalamic control of noradrenaline circuit.2018

    • Author(s)
      Soya S, Sakurai T
    • Journal Title

      Brain Research

      Volume: 11 Pages: 32-32

    • DOI

      10.1016/j.brainres.2018.11.032

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 睡眠覚醒とオレキシン2018

    • Author(s)
      征矢 晋吾、櫻井 武
    • Journal Title

      睡眠医療

      Volume: 12 Pages: 419-422

    • Related Report
      2018 Research-status Report
  • [Journal Article] 睡眠覚醒のスイッチングに関わる神経機構2018

    • Author(s)
      征矢 晋吾
    • Journal Title

      分子精神医学

      Volume: 18 Pages: 209-216

    • Related Report
      2018 Research-status Report
  • [Journal Article] 情動と睡眠2018

    • Author(s)
      征矢 晋吾
    • Journal Title

      医学のあゆみ

      Volume: 00 Pages: 54-60

    • Related Report
      2018 Research-status Report
  • [Presentation] Deciphering the neural mechanism of 'willpower' that motivates voluntary wheel running2019

    • Author(s)
      Shingo Soya, Takeshi Sakurai
    • Organizer
      International sports neuroscience conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] オレキシンと恐怖;不安障害やPTSDの治療薬としてのOX1R拮抗薬の可能性2019

    • Author(s)
      征矢晋吾
    • Organizer
      薬理学会年会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Remarks] 災害多発時代の福音になるか? 「寝てる間にPTSD軽減」研究を直撃

    • URL

      https://wpi-forum.jsps.go.jp/bluebucks/vol1-1/

    • Related Report
      2019 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

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