食欲を抑制する神経回路の遺伝子識別
Matthew E Carter1, Marta E Soden, Larry S Zweifel
11] Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA [2] Department of Biochemistry, University of Washington, Seattle, Washington 98195, USA [3] Department of Biology, Williams College, Williamstown, Massachusetts 01267, USA.
Nature
|October 15, 2013
まとめ
研究者は,食べることが不利であるときに食欲を抑制する神経回路を特定しました. この経路は,パラブラキアル核の特定の神経細胞を中心の桃体に投射し,食欲の調節のための潜在的な治療目標を提供します.
科学分野:
- 神経科学は神経科学である.
- 食欲の調節とは食欲の調節です.
- 脳幹回路は,脳幹回路を構成しています.
背景:
- 食欲抑制は,病気や毒素被曝などの状態において極めて重要です.
- 脳幹のパラブラキアル核は食欲のコントロールに関与しています.
- 栄養を調節するパラブラキアル核内の特定のニューロンは,未確認のままです.
研究 の 目的:
- 食欲抑制を担当するパラブラキアル核の特定のニューロンと下流投影を特定する.
- 食欲抑制を媒介する神経回路を解明するには,食べることが不利であるとき.
主な方法:
- ネズミで遺伝的にコードされた解剖学,光学,および薬理学的ツールを活用しました.
- カルシトニン遺伝子に関連するペプチド発現神経細胞の役割を調査した.
- パラブラキアル核から桃体の中央核への投影を調べた.
主要な成果:
- カルシトニン遺伝子に関連するペプチド発現ニューロンを含む回路をパラブラキアル核で特定し,中央アミグダラに投影した.
- この回路の活性化は食欲を抑制する.
- この回路の阻害は,食物摂取を増やし,特定のモデルで飢餓を防ぐ.
結論:
- パラブラキアル核から中央杏仁核までの新しい神経回路が食欲抑制を媒介する.
- この回路は,食べることが不利であるときに非常に重要です.
- 特定された回路は,食欲障害の潜在的な治療目標を示しています.
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