GABA (((B) 媒介による半球間阻害の細胞基盤
Lucy M Palmer1, Jan M Schulz, Sean C Murphy
1Physiologisches Institut, Universität Bern, Bühlplatz 5, CH-3012 Bern, Switzerland.
Science (New York, N.Y.)
|February 25, 2012
まとめ
GABA (B) 受容体によって媒介される半球間阻害は,ピラミッド型ニューロン発火をアピカルデンドライト経由で静止させます. このメタボトロピク阻害は,皮質の出力に極めて重要であり,ニューロンの活動に依存しています.
科学分野:
- 神経科学は神経科学である.
- 細胞神経科学とは
- センサリーシステム センサリーシステム
背景:
- 半球間阻害は,角質のライバル性をカロソール経路を通じて調節する.
- 長期的な阻害はGABA (((B)) 受容体と関連しているが,細胞レベルで理解されていない.
研究 の 目的:
- 長期間の半球間阻害の細胞メカニズムを解明する.
- ニューロンの発火を阻害するGABA(B) 受容体の役割を調査する.
主な方法:
- ネズミの体感覚皮質の5層のピラミッドニューロンからの電気生理学的記録.
- 反対側と反対側の感覚経路の刺激.
- アピカルデンドライトに作用する抑制メカニズムの分析.
主要な成果:
- 反対側感覚刺激によって誘発されたピラミッドニューロンの発火は,反対側刺激によって数百ミリ秒間抑制された.
- 抑制は,層1内ニューロン経由でアピカルデンドライトに直接発生しました.
- 阻害プロセスは,活気のあるデンドリット電流のメタボトロピク阻害を利用したピラミッド細胞の発火に依存していた.
結論:
- この研究は,半球間阻害の基礎となるマイクロ回路を明らかにしています.
- この抑制メカニズムを通じて皮質の出力を調節するために,活発なデンドリット特性は非常に重要です.
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