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哺乳類のGrb2は,胚の発達と悪性変異の複数の段階を調節する
A M Cheng1, T M Saxton, R Sakai
1Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.
Cell
|December 29, 1998
まとめ
アダプタータンパク質Grb2は,胚の発達と癌に不可欠です. 遺伝子研究によると,Grb2は内皮細胞の分化と表皮質の形成に必要であり,Ras信号伝達経路とリンクしています.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学とは
- 細胞シグナル伝達 細胞信号伝達
背景:
- SH2およびSH3ドメインを持つタンパク質は,シグナル伝達に不可欠であり,チロシンキナーゼを細胞内経路に結びつける.
- アダプタータンパク質は,これらのシグナル伝達イベントを媒介する上で重要な役割を果たします.
- Grb2のような哺乳類のSH2/SH3アダプターの特殊な機能が,発育と疾患においてどのように作用するかについては,さらなる解明が必要である.
研究 の 目的:
- 哺乳類のSH2/SH3アダプターGrb2.2の生物学的機能を調査する.
- Grb2が胚形成と癌における役割を決定する.
- Grb2-Ras信号伝達経路の遺伝的証拠を提供するために.
主な方法:
- Grb2.のマウス遺伝子に無変異を導入した.
- 変異した胚性幹細胞,胚,キメラの分析.
- Grb2のアダプター機能と救助能力を評価するための融合タンパク質の作成.
主要な成果:
- Grb2は,胚形成中の内皮細胞の分化と表皮質の形成に不可欠です.
- Grb2は生理学的アダプタとして作用し,そのSH2ドメインは,Sos1と融合すると,Grb2欠乏のフェノタイプを部分的に救う.
- Grb2は,ポリオマウイルスの中央T抗原誘発乳腺がんの発生率を制限する.
結論:
- Grb2は哺乳類の胚形成の複数の側面に不可欠である.
- 遺伝的証拠は,SH2/SH3ドメインの相互作用によって媒介されるGrb2-Ras信号伝達経路を支持しています.
- この経路は,胚の発達と癌の病原化の両方で重要な役割を果たしています.
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