社会的な階層の双方向的な制御は,中部前頭前皮質のシナプス効果によって行われる
1Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
まとめ
マウスの社会的ランクは,中央前頭前皮質 (mPFC) のシナプス強度によって決定されます. この神経回路を変更すると,動物の社会的地位が変化し,支配階層の可塑性を明らかにします.
科学分野:
- 神経科学は神経科学である.
- 動物の行動 動物の行動
- 社会的な階層構造
背景:
- 支配的階層は,動物の生存,健康,繁殖に大きく影響を与えます.
- 社会的ランク決定の基礎となる神経機構は,依然としてほとんど未調査のままである.
研究 の 目的:
- ネズミの社会的階層のニューラル回路機構を調査する.
- 社会的ランクにおける中部前頭前皮質 (mPFC) の役割を決定する.
主な方法:
- マウスにおける支配的ランキングの安定性とトランジティビティの評価.
- 中間前頭前皮質 (mPFC) の層Vのピラミッドニューロンで記録されたシナプス入力強度.
- mPFCニューロンにおける操作されたシナプス効果と社会的ランクに対する観察された効果.
主要な成果:
- マウスの支配的ランキングは安定し,トランジティブであることが判明しました.
- 高位のマウスは,従属者と比較して,mPFCニューロンにおけるより強い刺激性シナプス入力を示した.
- mPFCニューロンにおけるシナプス効果の増加は,より高い社会的ランクにつながり,効果の低下は,より低いランクにつながった.
結論:
- 中間前頭前皮質 (mPFC) は,社会的階層の確立と維持において重要な役割を果たします.
- 社会的ランクは,mPFCのピラミッド神経細胞のシナプス強さを変化させることで調節できるプラスティックな特徴である.
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