細胞表面のヘパリンのような分子は,基礎線維芽細胞成長因子をその高親和性受容体と結合させるために必要である
A Yayon1, M Klagsbrun, J D Esko
1Department of Chemical Immunology, Weizmann Institute of Science, Rehovot, Israel.
Cell
|February 22, 1991
まとめ
低親和性のヘパリンのような結合部位は,高親和性の基本線維芽細胞成長因子 (bFGF) 受容体結合のための不可欠な補助分子である. これらの部位は成長因子の相互作用を調節し,細胞シグナル伝達における新しいメカニズムを明らかにします.
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
- 分子生物学は分子生物学である.
背景:
- 基礎線維芽細胞成長因子 (bFGF) は,細胞の成長と分化に不可欠です.
- bFGFがその受容体と相互作用することは,信号伝達に極めて重要です.
- この相互作用における低親和結合部位の役割は,まだ完全に解明されていない.
研究 の 目的:
- bFGF.の低親和性ヘパリンのような結合部位の機能を調査する.
- これらの部位が,高親和性bFGF結合に必要かどうかを判断する.
- 成長因子受容体相互作用におけるこれらの部位の規制的役割を理解する.
主な方法:
- 中国ハムスター卵巣 (CHO) 細胞を用いて,グルコースアミノグリカン代謝に変異がある.
- マウスのFGF受容体cDNAをクローンしたマウスの変異細胞に感染した.
- フリーヘパリンとヘパラン硫酸塩の存在または欠如で bFGF結合を評価した.
主要な成果:
- FGF受容体を発現するヘパラン硫酸欠乏CHO細胞は,bFGFを結合することができなかった.
- 自由ヘパリンとヘパラン硫酸塩の溶解は,低親和性bFGF結合.
- この低親和性受容体は,高親和性bFGF結合に必要でした.
結論:
- 低親和性のヘパリン型受容体は,bFGF結合の補助分子として作用する.
- これらの受容体は,bFGFとその受容体との高親和相互作用のために必須である.
- これは,ヘパリンのような分子を含む成長因子受容体シグナル伝達のための新しい規制メカニズムを強調しています.
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