酸化された低密度リポタンパク質は,基本的な線維芽細胞成長因子の発現を抑制することによって,内皮細胞の増殖を抑制します
1Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA. cchen@bcm.tmc.edu
Circulation
|January 19, 2000
まとめ
酸化されたLDL (ox-LDL) は,基礎線維芽細胞成長因子 (bFGF) の発現を抑制することによって,内皮細胞の増殖を抑制します. この抑制は,オックス-LDLが内皮細胞に及ぼす細胞毒性作用に寄与し,動脈硬化症の新たな治療標的を示唆する.
科学分野:
- 心血管生物学 心血管生物学
- 細胞生物学 細胞生物学
- 分子医学は分子医学である.
背景:
- 超脂血症は,内皮細胞 (EC) の増殖と血管新生を阻害する.
- これらのメカニズムの理解は,新型の動脈硬化症の治療法につながる可能性があります.
研究 の 目的:
- 酸化低密度リポプロテイン (ox-LDL) が,ECsにおける基礎線維芽生殖成長因子 (bFGF) 発現に及ぼす影響を調査する.
- オックス-LDL誘発EC機能不全におけるbFGF抑制の役割を明らかにする.
主な方法:
- 牛の大動脈ECは,ox-LDL.とインキュベートされた.
- bFGFのmRNAとタンパク質レベル,DNA/RNA合成,細胞複製を評価した.
- mRNAの分解とタンパク質合成の要件を分析した.
主要な成果:
- Ox-LDLは,時間および用量に依存した方法で,bFGF mRNAおよびタンパク質レベルを大幅に低下させた.
- この減少は,DNA/RNA合成と細胞複製の減少と相関していた.
- Ox-LDLは,bFGFのmRNAの分解を加速し,この効果のために新しいタンパク質の合成を必要とした.
結論:
- 酸化されたLDLのECに対する細胞毒性効果は,部分的にbFGF発現抑制によるものです.
- bFGFレベルの回復は,DNAとRNA合成のox-LDL誘発阻害を逆転させることができます.
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