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Analysis of brain circuits for pain in a psychological stress model in a highly social rodent.

Research Project

Project/Area Number 18K07370
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionKochi University

Principal Investigator

Yuri Kazunari  高知大学, 教育研究部医療学系基礎医学部門, 教授 (10220534)

Co-Investigator(Kenkyū-buntansha) 大迫 洋治  高知大学, 教育研究部医療学系基礎医学部門, 准教授 (40335922)
Project Period (FY) 2018-04-01 – 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 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords心理ストレス / パートナーロス / 心理社会的ストレス / コルチコステロン放出因子 / FosB / 痛み
Outline of Final Research Achievements

We have reported an animal model of psychological stress-induced hyperalgesia in a monogamous rodent, males separated from their female partners (loss males) became anxious and displayed exacerbated inflammatory pain behaviors. During inflammatory pain, the hypothalamic paraventricular nucleus (PVN) in the loss males had significantly higher cFos-immunoreactivity (ir) compared to the paired males. Under no pain condition, the PVN in the loss males showed higher FosB-ir, vasopressin-ir and corticotropin releasing factor (CRF)-ir than the loss males. The amygdala is one of the pain-related brain regions where cFos expression differed between the paired and loss males during inflammatory pain, and also exhibited higher CRF-ir in the loss males in the present study. The present results suggest the possibility that neurochemical alterations in the PVN during the period of psychosocial stress exacerbate pain behaviors.

Academic Significance and Societal Importance of the Research Achievements

社会的一夫一婦制げっ歯類において絆を形成したパートナーと別離すると不安がりになり、炎症時の痛みが悪化する。本研究で、この心理社会的ストレスモデルに炎症痛を惹起させると、パートナーと同居している状態に比べて、視床下部室傍核ニューロンが強く反応した。痛みを惹起しない状態でも、パートナーとの別離期間に視床下部室傍核ニューロンが活性化し、ストレス反応に関与するバゾプレッシンとコルチコトロピン放出因子ニューロンの免疫活性が高くなっていた。近年、慢性痛の発症に心理社会的ストレスが関与している可能性が示唆されており、本研究における成果は慢性痛の発症メカニズムの解明に貢献できると考える。

Report

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

    (5 results)

All 2020 2019

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

  • [Journal Article] Oxytocin Receptor Antagonist Reverses the Blunting Effect of Pair Bonding on Fear Learning in Monogamous Prairie Voles2020

    • Author(s)
      Yu Hirota, Aki Arai, Larry J Young, Yoji Osako, Kazunari Yuri, Shinichi Mitsui
    • Journal Title

      Hormones and Behavior

      Volume: 120 Pages: 104685-104685

    • DOI

      10.1016/j.yhbeh.2020.104685

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of Post-Weaning Social Isolation on Social Behaviors and Oxytocinergic Activity in Male and Female Rats2019

    • Author(s)
      Kenjiro Tanaka, Yoji Osako, Kou Takahashi, Chiharu Hidaka, Koichi Tomita, Kazunari Yuri
    • Journal Title

      Heliyon

      Volume: 5 Issue: 5 Pages: e01646-e01646

    • DOI

      10.1016/j.heliyon.2019.e01646

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Chronic pain impairs pair-bond maintenance in monogamous rodents, prairie voles2019

    • Author(s)
      Yoji Osako, Reiko Nobuhara, Takahiro Okuda, Chiharu Hidaka, Young-Chang P Arai, Makoto Nishihara, Larry J. Young, Kazunari Yuri
    • Organizer
      IBRO2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Modulation of nociception by social bonds in the monogamous rodent: c-Fos expression in the brain “pain matrix” under conditions of inflammatory pain2019

    • Author(s)
      Takahiro Okuda, Yoji Osako, Kou Takahashi, Kenjiro Tanaka, Takao Okabe, Hideaki Takebayashi, Larry J. Young, Takahiro Ushida, Kazunari Yuri
    • Organizer
      IBRO2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 心理社会的ストレス下における侵害刺激による疼痛関連脳領域のc-Fos発現について2019

    • Author(s)
      奥田 教宏、大迫 洋治、高橋 弘、田中 健二朗、日高千春、井上 佳和、竹林 秀晃、由利 和也
    • Organizer
      第124回日本解剖学会学術集会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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