異なる神経経路は,不安における分離可能な特徴から行動状態を組み立てる
Sung-Yon Kim1, Avishek Adhikari, Soo Yeun Lee
1Department of Bioengineering, Stanford University, Stanford, California 94305, USA.
Nature
|March 22, 2013
まとめ
ストリア・ターミナリス (BNST) のベッド核は,不安特性を調整する. 異なるBNSTサブリージョンは,対極的な効果を発揮し,BNSTの背後のプロジェクションは,特定の神経回路を通じて不安解消を媒介する.
科学分野:
- 神経科学は神経科学である.
- 行動神経科学は,行動神経科学である.
- 不安に関する研究
背景:
- 哺乳類の不安状態は,行動および生理学的特徴の調整された調節を伴う.
- 中枢神経系,特に特定の脳の領域は,これらの多様な不安の表れをオーケストラします.
- 不安の原因となる神経回路を理解することは,ターゲットを絞った治療介入の開発に不可欠です.
研究 の 目的:
- ストレア・ターミナリス (BNST) のベッド核である単一の脳領域からの神経投影が,不安の多様な特徴をどのように媒介するのかを調査する.
- 不安調節に関与するBNST内の特定のサブリージョンと異なる経路を特定する.
- BNSTが不安状態を組み立てる回路メカニズムを解明する.
主な方法:
- 行動分析,in vivoおよびin vitroの電気生理学,およびマウスの光遺伝学の統合.
- 呼吸器生理学と行動選択パターンの分析.
- 異なる環境への曝露中に自由に移動する動物におけるニューロン活動のインビボ記録.
主要な成果:
- 2つのBNST亜領域は対極的な効果を示した:円BNSTは不安特性を促進し,背面BNSTは不安解消効果を示した.
- 3つの異なるアンテロドーサルBNSTエフェラントプロジェクションは,差異的にアンキオリシスを媒介する:リスク回避の減少 (横向下垂体),呼吸速度の減少 (パラブラキアル核),および陽性バレンスの増加 (腹部テグメンタル領域).
- 回路要素の選択的抑制と刺激は,対極な行動的結果を生み出し,アンテロドーサルのBNSTニューロンは,不安を引き起こす環境から安全で区別された.
結論:
- 異なるBNSTサブリージョンは,不安を調節する上で対極的な役割を果たします.
- 特定の背前BNST投影は,分離可能な抗不安効果を媒介し,機能的専門性を強調します.
- この研究は,不安に関連する行動的および生理学的特徴の協調的な組み立ての基礎となる新しい回路メカニズムを示しています.
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