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Research on neuronal dematuration disorder hypothesis of depression

Research Project

Project/Area Number 19K06961
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 InstitutionNippon Medical School

Principal Investigator

Kobayashi Katsunori  日本医科大学, 医学部, 准教授 (10322041)

Project Period (FY) 2019-04-01 – 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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords脳・神経 / うつ病 / 海馬
Outline of Research at the Start

本研究ではマウスモデルを用いて、生理的刺激による神経脱成熟の障害が、うつ病の病態に関与する可能性を検討する。豊富環境飼育による脱成熟誘導を確定し、その障害を示すモデルを探索する。その際、既存のうつ病のモデルマウスを再評価するとともに、脂質生合成経路を障害した新規モデルのスクリーニングを行う。さらに、豊富環境における探索的行動を指標としたうつ様行動の新規評価系を確立し、AAVによる脂質生合成経路等の操作手法を活用して、脱成熟障害とうつ様行動の関係を明らかにする。

Outline of Final Research Achievements

I have previously shown that antidepressant treatment induces dematuration, a change in neuronal phenotypes to an immature-like state, in the mouse hippocampus. In the present study, I have examined a possibility that impairment of physiological dematuration underlies the pathophysiology of depression. Chronic stress caused a sustained decrease in cage activity of mice housed in isolation. Antidepressant treatment combined with exercise induced dematuration in the stressed mice, but not in control mice, and restored the cage activity. Environmental enrichment induced dematuration-like changes in neuronal functions. Chronic stress had minor effects on behavior of mice housed in enriched environment. These results suggest that the induction of dematuration depends on environmental conditions, and that mice are more susceptible to stress-induced behavioral impairment when housed in environmental conditions that do not facilitate the induction of dematuration.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果はうつ病の病態解明と克服に貢献すると考えられる。本研究で観察した神経機能変化のメカニズムや、変化を生じさせる生体内外要因の理解がさらに進めば、うつ病の予防方法や治療方法の改善に結び付く知見が得られると期待される。特に、ストレスを受けた際に、それを弾き返してうつ病にならないようにする力、つまりレジリエンスを高める方法の開発や、生活習慣の提案に結び付くと考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] Mice with cleavage-resistant N-cadherin exhibit synapse anomaly in the hippocampus and outperformance in spatial learning tasks2021

    • Author(s)
      M. Asada-Utsugi, K. Uemura, M. Kubota, Y. Noda, Y. Tashiro, T. M. Uemura, H. Yamakado, M. Urushitani, R. Takahashi, S. Hattori, T. Miyakawa, N. Ageta-Ishihara, K. Kobayashi, M. Kinoshita, A. Kinoshita
    • Journal Title

      Molecular Brain

      Volume: 14 Issue: 1 Pages: 23-23

    • DOI

      10.1186/s13041-021-00738-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Predominant role of serotonin at the hippocampal mossy fiber synapse with redundant monoaminergic modulation2020

    • Author(s)
      Katsunori Kobayashi, Yasunori Mikahara, Yuka Murata, Daiki Morita, Sumire Matsuura, Eri Segi-Nishida, Hidenori Suzuki
    • Journal Title

      iScience

      Volume: 23 Issue: 4 Pages: 101025-101025

    • DOI

      10.1016/j.isci.2020.101025

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ノルアドレナリン作動性ドパミンD1受容体活性化による海馬シナプス修飾2019

    • Author(s)
      小林克典、鈴木秀則
    • Organizer
      日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 精神疾患のエンドフェノタイプとしての脳神経細胞の機能的成熟の異常2019

    • Author(s)
      小林克典
    • Organizer
      日本神経精神薬理学会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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