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Pathophysiological mechanisms and therapeutic targets for abnormal habit formation-related obsessive-compulsive symptoms

Research Project

Project/Area Number 20K16009
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 47040:Pharmacology-related
Research InstitutionKyoto University (2021)
Kyoto Prefectural University of Medicine (2020)

Principal Investigator

Asaoka Nozomi  京都大学, 医学研究科, 助教 (90826091)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords強迫性障害 / 線条体 / ドパミンD2受容体 / 活性酸素産生酵素 / 習慣 / D2受容体
Outline of Research at the Start

繰り返す強迫観念と強迫行為を特徴とする強迫性障害は、薬物治療の奏効率が低く、数十年単位の経過をたどる例も少なくない。本研究では、強迫行為への「とらわれ」の原因として想定されている異常な習慣の形成に焦点を当て、独自の強迫性障害モデルマウスを用いて発展的な検討を行う。具体的には、モデルマウスで見出した線条体中央部の神経細胞種選択的な可塑的変化に注目し、分子生物学的、行動学的、電気生理学的手法を用いて異常な習慣形成の病態生理学的な意義や神経メカニズムの検討を行う。さらに最終的には見出したメカニズムを基にした治療ターゲットの導出を目指す。

Outline of Final Research Achievements

Obsessive-compulsive disorder (OCD) is a psychiatric disorder characterized by repeatedly rising concern and repetitive behaviors to get rid of the concern. Its precise pathological mechanisms are still being elucidated. Here, we investigated the involvement of NADPH oxidase 1 (NOX1) in compulsive behavior of OCD model mice. behavioral and electrophysiological analysis showed that NOX1 was necessary for induction of D2 receptor stimulation-induced synaptic plasticity in the striatum of OCD model mice. Acute inhibition of NOX1 significantly reduced OCD-related behaviors. Our study suggests that inhibition of NOX1 may become a novel therapeutic target for OCD.

Academic Significance and Societal Importance of the Research Achievements

強迫性障害をはじめ、依存症や摂食障害など、強迫的な行動が問題となる疾患では、ドパミン神経系、特にドパミンD2受容体の異常が示唆されていますが、こうしたドパミン系の異常がどのようなメカニズムで強迫性発現に繋がるのかは明らかとなっていませんでした。本研究は、活性酸素産生酵素であるNOX1由来の活性酸素が、ドパミンD2受容体の下流シグナル変動を引き起こすことで、線条体の興奮性シナプス機能の変化を誘発し、強迫性発現に寄与していることを見出しました。本成果は、強迫性発現の新たな神経メカニズム解明、および治療標的の導出に資するものであると考えられます。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] A selective serotonin reuptake inhibitor ameliorates obsessive compulsive disorder-like perseverative behavior by attenuating 5-HT2C receptor signaling in the orbitofrontal cortex2022

    • Author(s)
      Hatakama Hikari、Asaoka Nozomi、Nagayasu Kazuki、Shirakawa Hisashi、Kaneko Shuji
    • Journal Title

      Neuropharmacology

      Volume: 206 Pages: 108926-108926

    • DOI

      10.1016/j.neuropharm.2021.108926

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] NOX1/NADPH Oxidase Promotes Synaptic Facilitation Induced by Repeated D2 Receptor Stimulation: Involvement in Behavioral Repetition2021

    • Author(s)
      Asaoka Nozomi、Ibi Masakazu、Hatakama Hikari、Nagaoka Koki、Iwata Kazumi、Matsumoto Misaki、Katsuyama Masato、Kaneko Shuji、Yabe-Nishimura Chihiro
    • Journal Title

      The Journal of Neuroscience

      Volume: 41 Issue: 12 Pages: 2780-2794

    • DOI

      10.1523/jneurosci.2121-20.2021

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Presentation] NOX1/NADPH oxidase regulates compulsive-like repetitive behaviors through promoting D2 receptor-mediated synaptic facilitation in the striatum2021

    • Author(s)
      Nozomi Asaoka, Masakazu Ibi, Shuji Kaneko, Chihiro Yabe-Nishimura
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] NOX1/NADPH oxidaseはドパミンD2受容体を介した 線条体のシナプス増強を促進することで強迫様行動の誘発に関与する2021

    • Author(s)
      浅岡 希美, 金子 周司, 矢部 千尋
    • Organizer
      第71回 日本薬学会関西支部総会・大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] NOX1/NADPH oxidase regulates compulsive-like repetitive behaviors through promoting D2 receptor-mediated synaptic facilitation in the striatum2021

    • Author(s)
      Nozomi Asaoka, Shuji Kaneko, Chihiro Yabe-Nishimura
    • Organizer
      第43回 日本生物学的精神医学会 第51回 日本神経精神薬理学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] NOX1/NADPH oxidase regulates compulsive-like repetitive behaviors through promoting D2 receptor-mediated synaptic facilitation in the striatum2021

    • Author(s)
      Nozomi Asaoka, Shuji Kaneko, Chihiro Yabe-Nishimura
    • Organizer
      第44回日本神経科学大会 CJK第1回国際会議
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NOX1/NADPH oxidase regulates compulsive-like repetitive behaviors through promoting D2 receptor-mediated synaptic facilitation in the striatum2021

    • Author(s)
      浅岡 希美、衣斐 督和、金子 周司、矢部 千尋
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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