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bFGF媒介のフィブロブラストの成長とミオブラストの分化のためのヘパラン硫酸の必要性
A C Rapraeger1, A Krufka, B B Olwin
1Department of Pathology, University of Wisconsin, Madison 53706.
まとめ
細胞表面のヘパラン硫酸塩は,基本的な線維芽生殖成長因子 (bFGF) 信号伝達に不可欠です. この相互作用を阻害すると,bFGF受容体結合,細胞成長,分化プロセスが損なわれます.
科学分野:
- 細胞生物学 細胞生物学
- バイオケミストリー バイオケミストリー
- 分子シグナリング
背景:
- 基礎線維細胞成長因子 (bFGF) は,重要なシグナル伝達分子である.
- bFGFは,細胞表面のプロテオグリカンとチロシンキナーゼ受容体と相互作用する.
- bFGFシグナル伝達における細胞表面ヘパラン硫酸塩の正確な役割は明らかにする必要があります.
研究 の 目的:
- bFGF媒介の細胞シグナル伝達における細胞表面ヘパラン硫酸の直接的関与を調査する.
- bFGF-ヘパラン硫酸塩の結合を阻害することで,下流の細胞イベントに与える影響を決定する.
主な方法:
- 細胞表面ヘパラン硫酸塩とbFGFとの結合の実験的防止.
- bFGFの細胞表面受容体への結合を評価する.
- 線維芽細胞の成長に対する効果の評価 (スイス3T3).
- 骨格筋細胞の分化分析 (MM14)
主要な成果:
- ヘパラン硫酸塩-bFGF結合を防ぐことは,bFGF受容体相互作用を大幅に減少させた.
- スイス3T3線維芽細胞の成長を支えるbFGFの能力が阻害されました.
- 通常はbFGFによって抑制されるMM14骨格筋細胞の末端分化が誘発された.
結論:
- 細胞表面ヘパラン硫酸は,bFGF細胞シグナル伝達を媒介する直接的で重要な役割を果たします.
- ヘパラン硫酸塩は,bFGFの活動のための重要な共受容体またはファシリテーターとして作用します.
- これらの発見は,bFGF.経由で細胞の成長と分化を調節するヘパラン硫酸の重要性を強調しています.
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