POMCの飽和神経からのタラミックオピオイドは,砂糖の食欲を切り替える
Marielle Minère1,2, Hannah Wilhelms1, Bojana Kuzmanovic3
1Research Group Synaptic Transmission in Energy Homeostasis, Max Planck Institute for Metabolism Research, Cologne, Germany.
Science (New York, N.Y.)
|February 13, 2025
まとめ
科学 者 たち は,飽き 感 を 促進 する こと に 知ら れ て いる プロ オピオメラノコルチン (POMC) ニューロン も,砂糖 の 食欲 を 活性化 し て いる こと を 発見 し まし た. この発見は 飽きても 甘いものを欲しがる理由を明らかにし 過剰な消費を促しています
科学分野:
- 神経生物学
- 食欲の調節
- 代謝神経科学
背景:
- 高糖摂取は食事後でも一般的であり,複雑な食欲の調節を示唆しています.
- 飽きたときの選択的な砂糖の食欲の神経生物学的な根拠はよく理解されていません.
- 視床下部のプロオピオメラノコルチン (POMC) ニューロンは 飽和感を制御し 食物摂取量を減少させます
研究 の 目的:
- 飽きた状態で砂糖を好む神経生物学的メカニズムを調査する
- 食事後の砂糖への渇望を調節する 下垂体POMCニューロンの役割を決定する
主な方法:
- ニューロンの活動と信号伝達経路を研究するためにマウスモデルを使用した.
- POMCニューロンのプロジェクションを研究した.
- 砂糖の消費と飽和感の文脈におけるオピオイド受容体のシグナリングを調べた.
主要な成果:
- POMCニューロンは 満腹感を助長する一方で 同時に砂糖への食欲を活性化することが分かりました
- POMCニューロンのプロジェクションを伴う特定のオピオイド回路がパラバントリキュラー・タラムスに特定されました.
- この回路は,特に飽和状態では,砂糖の消費中に強い活性化を示しました.
- この回路を阻害することで 飽き飽きしたマウスの糖質の高い食事の摂取量が減った.
結論:
- 下垂体POMCニューロンは 飽和感を促進し 砂糖への食欲を誘発します
- POMCニューロン駆動のマウオピオイド経路は,腹満腹時に糖分を媒介する.
- 新しく特定されたこの回路をターゲットにすることで,砂糖の過剰消費を管理する戦略が提供されるかもしれません.
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