社会的地位の喪失と関連したうつ病のような状態の根底にある神経機構
Zhengxiao Fan1, Jiarui Chang2, Yilan Liang2
1Department of Neurobiology, Affiliated Mental Health Center & Hangzhou Seventh People's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, MOE Frontier Science Center for Brain Science and Brain-Machine Integration, State Key Laboratory of Brain-Machine Intelligence, Zhejiang University, Hangzhou 311121, China.
Cell
|January 24, 2023
まとめ
ネズミの社会的地位の喪失は,負の報酬予測エラーによってうつ状態を誘発し,側頭前皮質 (LHb) を活性化し,中頭前皮質 (mPFC) を阻害する. ステータスを取り戻すと これらの効果は逆転する.
科学分野:
- 神経科学
- 行動科学
- 精神科
背景:
- 社会的下落は 鬱病の危険因子として知られています
- 社会的地位の低下と鬱を結びつける 神経学的メカニズムは 明らかになっていません
研究 の 目的:
- 社会的地位の喪失と 鬱病の行動を結びつける 神経学的メカニズムを解明する
- この過程における報酬予測の誤りや 特定の脳の領域を調査する.
主な方法:
- 社会的地位の低下を誘発するために マウスモデルを利用した.
- in vivo 繊維光度測定と単一ユニットの電気生理学的記録を用いる.
- 社会的競争や地位の変化に反応する 鬱のような行動と神経活動の測定
主要な成果:
- 自然な損失とは異なり,強制的な社会的ランク喪失は,負の報酬予測エラー (RPEs) を誘発した.
- RPEは脳の反報酬センターである側頭部 (LHb) を強く活性化させました
- LHbの活性化により,中部前頭皮質 (mPFC) が抑制され,後退行動とうつ病のような症状が増加しました.
- 社会的地位を逆転させることで 行動や神経の変化を 改善することができました
結論:
- RPE,LHb,mPFCを含む 神経回路を特定し 社会的地位の喪失と鬱病の行動を結びつけました
- ソーシャルモビリティとメンタルヘルスとの相互作用は 特定のニューロンの信号伝達経路によって媒介されていることが示されました
- LHb-mPFC経路は,社会的移動性に関連する心理的障害に対処する介入の潜在的な治療目標として強調されました.
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