ニューラル・クライストは,NOTCHの一時的な活性化を通じて,ミオゲネシスを調節する
Anne C Rios1, Olivier Serralbo, David Salgado
1EMBL Australia, Australian Regenerative Medicine Institute, Monash University, Building 75, Clayton, Victoria 3800, Australia.
Nature
|May 17, 2011
まとめ
神経頂部細胞は,デルタ1信号を伝達することによって,鶏の骨格筋の発達を調節する. これにより,筋肉の祖先におけるNOTCHシグナル伝達が一時的に活性化され,胚形成の間にバランスのとれた分化が確保されます.
科学分野:
- 発達生物学 発達生物学とは
- セル・シグナリング
- 胚形成とは,胚の形成である.
背景:
- ダイナミック・シグナル伝達と組織の再編成が,胚形成の過程で複雑なパターンを形成する方法を理解することは,極めて重要です.
- 初期の骨格筋形態変異には,複雑な細胞相互作用と信号伝達経路が含まれています.
研究 の 目的:
- 初期のチキの骨格筋形態変異を制御するシグナルイベントの特徴を明らかにする.
- 筋肉の祖先の分化におけるNOTCHシグナル伝達とニューラルクライスト細胞の役割を明らかにする.
主な方法:
- 初期のチキの骨格筋発達中のシグナルイベントの分析.
- NOTCHシグナル伝達とそのリガンドDelta1.1の機能を調査する.
- ニューラル・クライスト細胞におけるデルタ1機能の操作により,ソマイト信号伝達とミオゲネシスへの影響を観察する.
主要な成果:
- ソマイトの筋肉の祖先は,端末の差異化のために一時的なNOTCHシグナリングの活性化を必要とする.
- 移動するニューラルクレスト細胞によって発現するデルタ1は,ソミットにおけるNOTCHシグナル伝達に影響を与えます.
- ニューラル・クライスト細胞におけるデルタ1機能の変異は,遅れたまたは早めの筋細胞形成につながります.
結論:
- ニューラル・クライストは,デルタ1発現細胞の移住を伴う新しいメカニズムを通じて,早期の筋肉形成を調節する.
- このプロセスは,特定の筋肉の祖先におけるNOTCHシグナル伝達を一時的に活性化させ,バランスのとれた分化を確保します.
- このダイナミックなシグナリングは,筋肉の祖先のプールの漸進的でバランスの取れた差別化を保証します.
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