アデレンス結合の異なる位置は,上皮の折りたたみの開始と関連しています
Yu-Chiun Wang1, Zia Khan, Matthias Kaschube
1Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA.
Nature
|March 30, 2012
まとめ
発達に不可欠な上皮質の折り畳みは,アデレンス交差点の位置変更を含む新しいメカニズムを通じて起こる可能性があります. このプロセスは,上皮の極性タンパク質によって調節され,組織形態変異に関する新しい洞察を提供します.
科学分野:
- 発達生物学 発達生物学について
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- 皮質の折り畳みは,組織形態変異の過程で複雑な構造を形成するために不可欠です.
- 確立されたモデルは,上皮の折り畳みをミオシン駆動の頂上収縮に起因する.
- アデレンス交差点の位置付けと上皮の極性を含む代替メカニズムが調査されています.
研究 の 目的:
- エピテリアの折りたたみのための代替メカニズムを記述する.
- 表面膜の折りたたみにおける差分アデレンス交差点の位置づけの役割を調査する.
- この過程における上皮の頂上基底極性の関与を明らかにする.
主な方法:
- ドロソフィラの生きた胚のイメージング.
- アデレンス・ジャンクション・ポジショニングの分析.
- 極性タンパク質のBazookaとPar-1の機能に関する研究.
- タンパク質のレベルと活性を操作する.
主要な成果:
- アデレンス結節は,ドロソフィラ gastrulationの背面横折れ形成の際に,基本的に開始細胞にシフトします.
- このベースシフトは,極性タンパク質のバズオカとPar-1に依存する.
- バズーカやPAR-1の活動が低下すると,折りたたみ開始は廃止されます.
- 変異したバズオカ/Par-1比は,子宮外背部の折りたたみにつながる.
- ベースジャンクションシフトは細胞の形状を変形させ,組織変形を促進します.
結論:
- 皮質の極性修正は,皮質の折りたたみ開始に直接影響する.
- 微分アデレンス交差点の位置づけは,組織形態変生における重要なメカニズムである.
- Bazooka/Par-1経路は,交差点の位置と,その後の組織の折り畳みを調節する.
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