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PTK7/CCK-4は,脊椎動物における平面細胞の極性の新しい調節剤である
Xiaowei Lu1, Annette G M Borchers, Christine Jolicoeur
1Department of Biological Sciences, Howard Hughes Medical Institute, Stanford, California 94305, USA.
Nature
|July 2, 2004
まとめ
タンパク質チロシンキナーゼ7 (PTK7) は,脊椎動物における平面細胞極性 (PCP) の新しい調節剤である. PTK7の変異は神経管の閉塞と毛毛細胞の方向性を破壊し,組織発達における重要な役割を強調しています.
科学分野:
- 発達生物学 発達生物学とは
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- 平面細胞の極性 (PCP) 経路は,種を超えて保存される上皮細胞の組織極性を確立します.
- フリズレッド (Frizzled) とデシャベルド (Dishevelled) のような重要なPCP遺伝子は,ドロソフィラのレギュレーターとして知られています.
- 脊椎動物では,PCPは神経管の閉塞と感覚毛細胞の発達に影響を与えます.
研究 の 目的:
- 脊椎動物の平面細胞の極性におけるタンパク質チロシンキナーゼ7 (PTK7) の役割を調査する.
- PTK7の神経管の閉塞と感覚毛細胞の指向における機能を決定する.
主な方法:
- ネズミの変異したPTK7遺伝子解析.
- vangl2変異マウスの遺伝子相互作用の研究.
- 毛細胞の極化中のPTK7の局所化研究.
- 開発中のXenopus PTK7ホモログの機能研究.
主要な成果:
- PTK7変異はマウスのニューラルチューブ閉塞とステレオシリアー束の方向性を破壊する.
- PTK7は,既知のPCP成分であるvangl2との遺伝的相互作用を示しています.
- PTK7は,毛細胞の極化時にダイナミックな局所化を示しています.
- Xenopus PTK7は,神経収束拡張と神経管閉塞に不可欠である.
結論:
- PTK7は,脊椎動物における平面細胞の極性の新しい調節体として特定されています.
- PTK7は脊椎動物の胚の発達,特に神経管の形成と感覚器官の発達において重要な役割を果たします.
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