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MRI imaging studies for disease differentiation using animal models of PTSD and depression

Research Project

Project/Area Number 17K18711
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Psychology and related fields
Research InstitutionKyoto Prefectural University of Medicine

Principal Investigator

Yoshii Takanobu  京都府立医科大学, 医学(系)研究科(研究院), 講師 (50468261)

Project Period (FY) 2017-06-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywordsストレス / PTSD / MRI / VBM / WKY / うつ病 / ミクログリア / 動物モデル / 画像研究 / 実験系心理学
Outline of Final Research Achievements

We utilized Wistar-Kyoto (WKY) rats and subjected them to single-prolonged stress (SPS) under two different conditions: solitary housing and pair housing. The rats were then compared using behavioral analysis and structural MRI. As a result, the Wistar rats in the pair housing condition exhibited significant behavioral changes following SPS, whereas no significant changes were observed in the solitary housing condition. Similarly, the expected pathological changes were not observed in the WKY rats. In terms of structural MRI, the solitary housing SPS group showed shrinkage in the right visual cortex, whereas the WKY rats in solitary housing with SPS displayed enlargement in the medial prefrontal cortex, somatosensory cortex, auditory cortex, and amygdala.

Academic Significance and Societal Importance of the Research Achievements

本研究のWistarラットにおけるSPS負荷後の視覚野の萎縮は先行研究(Yoshii et al., 2017)と一致しており、視覚野がストレス感受性領域である可能性が検証された。一方、WKYラットにSPSを負荷した結果、内側前頭前野・体性感覚野・聴覚野・扁桃体が肥大していることが判明した。WKYとWistarの遺伝的差異がストレス後の脳の形態変化に大きな影響を与えることが示唆された一方で、遺伝的要因による脳のストレス後の肥大は報告がほとんどなく、この結果はPTSDなどの疾患における臨床研究での萎縮部位の報告が一致しない要因となる可能性がある。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2021 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 3 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] The Role of the Thalamus in Post-Traumatic Stress Disorder2021

    • Author(s)
      Yoshii Takanobu
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 4 Pages: 1730-1730

    • DOI

      10.3390/ijms22041730

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Validation of the Wistar-kyoto Rat Kept in Solitary Housing as an Animal Model for Endogenous Depression Using Voxel-based Morphometry2021

    • Author(s)
      Yoshii Takanobu、Oishi Naoya、Sotozono Yasutaka、Watanabe Anri、Sakai Yuki、Yamada Shunji、Matsuda Kenichi、Kido Masamitsu、Ikoma Kazuya、Tanaka Masaki、Narumoto Jin
    • Journal Title

      -

      Volume: -

    • DOI

      10.21203/rs.3.rs-612118/v1

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] Brain atrophy in the visual cortex and thalamus induced by severe stress in animal model2017

    • Author(s)
      Yoshii Takanobu、Oishi Naoya、Ikoma Kazuya、Nishimura Isao、Sakai Yuki、Matsuda Kenichi、Yamada Shunji、Tanaka Masaki、Kawata Mitsuhiro、Narumoto Jin、Fukui Kenji
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 12731-12731

    • DOI

      10.1038/s41598-017-12917-z

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Single-prolonged stress brings brain atrophy in visual cortex and thalamus2018

    • Author(s)
      Yoshii Takanobu, Oishi Naoya, Nishimura Isao, Sakai Yuki, Matsuda Kenichi, Yamada Shunji, Tanaka Masaki, Narumoto Jin
    • Organizer
      WFSBP 2018 Asia Pacific Regional Congress of Biological psychiatry, Kobe
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2017-07-21   Modified: 2024-01-30  

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