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Neural circuits of emotional behavior and their alterations by observational fear

Research Project

Project/Area Number 20K07938
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionHiroshima University

Principal Investigator

Yoshida Takayuki  広島大学, 医系科学研究科(医), 准教授 (60374229)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords観察恐怖学習 / 幼若期ストレス / 内側前頭前皮質 / セロトニン / 恐怖学習 / ストレス / パッチクランプ法
Outline of Research at the Start

1. 幼若期にストレスを受けたマウスならびに 5ht2c受容体遺伝子欠損(5-HT2CKO)マウスにおける観察恐怖学習(共感様行動)を評価する。
2. 関連脳部位に逆行性トレーサーおよびアデノ随伴ウィルスベクターによる神経標識を行 い、観察恐怖学習に関与する神経回路ネットワークについて解析する。
3. 神経活動に依存的な遺伝子プロモーターにより観察恐怖に応答する神経細胞を機能的に標識し、その特徴と特性を形態解剖学的および電気生理学的に解析する。

Outline of Final Research Achievements

I investigated the central nervous system network and underlying neuronal activity involved in observed fear learning (negative empathy-like behavior) and its modification using a mouse model of emotional dysfunction caused by excessive physical and mental stress during childhood (juvenile stress mice). 5-HT2CKO mice lacked empathy, and juvenile stress mice may have enhanced observational fear learning. Neuronal activity of pyramidal cells in the medial prefrontal cortex of juvenile stress mice was analyzed by the slice patch clamp method. The results showed that the frequency of action potentials increased in female mice in the stress group, but remained unchanged in male mice. This may contribute to the higher risk of developing depression in females.

Academic Significance and Societal Importance of the Research Achievements

共感性の変容には先天性と後天性がある。例えば、自閉症スペクトラムや統合失調症などは先天的な共感性欠如が認められる場合がある。観察マウスのすくみ行動およびにおい嗅ぎ行動を共感様行動と解釈すれば、セロトニン2C受容体欠損マウスでは共感性が欠如しており、前述の精神疾患と同受容体との関連性が示唆される。幼若期ストレスマウスの内側前頭前皮質の錐体細胞の神経活動は雌マウスで亢進しており、雄マウスでは変化していなかった。これは女性のうつ病発症リスクが高いことの一因となる可能性がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2020 Other

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

  • [Int'l Joint Research] NIH/NIAAA(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Subanesthetic ketamine exerts antidepressant-like effects in adult rats exposed to juvenile stress2020

    • Author(s)
      Aikawa Katsuhiro、Yoshida Takayuki、Ohmura Yu、Lyttle Kerise、Yoshioka Mitsuhiro、Morimoto Yuji
    • Journal Title

      Brain Research

      Volume: 1746 Pages: 146980-146980

    • DOI

      10.1016/j.brainres.2020.146980

    • NAID

      120007168177

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A prefrontal-bed nucleus of the stria terminalis circuit limits fear to uncertain threat2020

    • Author(s)
      Glover Lucas R、McFadden Kerry M、Bjorni Max、Smith Sawyer R、Rovero Natalie G、Oreizi-Esfahani Sarvar、Yoshida Takayuki、Postle Abagail F、Nonaka Mio、Halladay Lindsay R、Holmes Andrew
    • Journal Title

      eLife

      Volume: 9

    • DOI

      10.7554/elife.60812

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Subanesthetic ketamine rapidly reverses depressive-like alterations induced by juvenile stress in adult rats2020

    • Author(s)
      Takayuki Yoshida, Katsuhiro Aikawa, Yu Ohmura, Yuji Morimoto, Mitsuhiro Yoshioka
    • Organizer
      第43回日本神経科学大会(Neuro2020)
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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