氧化低密度脂蛋白通过抑制基本纤维细胞生长因子表达来抑制内皮细胞增殖,从而抑制内皮细胞增殖
1Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA. cchen@bcm.tmc.edu
Circulation
|January 19, 2000
概括
氧化LDL (ox-LDL) 通过抑制基本纤维细胞生长因子 (bFGF) 表达来抑制内皮细胞增殖. 这种抑制有助于ox-LDL对内皮细胞的细胞毒性作用,为动脉样硬化提出了新的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 超脂血症会影响内皮细胞 (EC) 增殖和血管生成.
- 了解这些机制可能会导致新的动脉样硬化疗法.
研究的目的:
- 研究氧化低密度脂蛋白 (ox-LDL) 对基础纤维细胞生长因子 (bFGF) 在ECs中的表达的影响.
- 阐明bFGF抑制在ox-LDL引起的EC功能障碍中的作用.
主要方法:
- 牛大动脉EC被用牛-LDL化.
- 评估了bFGF的mRNA和蛋白质水平,DNA/RNA合成和细胞复制.
- 分析了mRNA降解和蛋白质合成的要求.
主要成果:
- 氧-LDL显著降低了bFGF mRNA和蛋白质水平,时间和剂量依赖.
- 这种减少与减少的DNA/RNA合成和细胞复制相关.
- 氧-LDL加速了bFGF的mRNA降解,需要新的蛋白质合成才能达到这一效果.
结论:
- 氧化LDL对EC的细胞毒性作用部分是由于抑制了bFGF表达.
- 恢复bFGF水平可以逆转ox-LDL诱导的DNA和RNA合成抑制.
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