通过整合素结合激酶对氧化低密度脂蛋白诱导的血管内皮细胞死亡进行保护
1Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USA.
Circulation
|December 6, 2001
概括
整合素相关激酶 (ILK) 保护血管内皮细胞免受氧化LDL (oxLDL) 诱导的亡. 升级ILK可以预防动脉样硬化中的内皮细胞损伤.
科学领域:
- 心血管生物学 心血管生物学
- 细胞信号传递 细胞信号传递
- 分子医学是分子医学.
背景情况:
- 整合素结合激酶 (ILK) 对于细胞外基质信号传递至关重要,并且优先表达在肌肉组织中.
- ILK作为蛋白激酶B的上游调节者,是亡的关键调解者.
- 氧化LDL (oxLDL) 通过内皮细胞亡参与了动脉生成.
研究的目的:
- 研究ILK在血管内皮细胞中氧化LDL (oxLDL) 诱导的亡中的作用.
- 为了确定ILK是否影响参与oxLDL诱导的细胞死亡的信号通路.
主要方法:
- 使用逆转录聚合酶链反应和西方分析研究ILK基因转录和翻译.
- 利用复合腺病毒载体用于ILK基因在内皮细胞中的过度表达.
- 使用两个独立的测定方法评估了亡,并分析了与亡相关的关键因素 (bcl-2,bcl-xl,caspase 3,caspase 9) 和p38 MAPK活性.
主要成果:
- 氧化LDL (oxLDL) 治疗增加了内皮细胞中的ILK基因转录和翻译.
- 过度表达ILK显著抑制了oxLDL诱导的亡和细胞死亡在人类脉和猿类病毒40转化小鼠淋巴状静脉内皮细胞.
- ILK抑制了由oxLDL诱导的p38基因激活蛋白激酶的激活,并调节了与亡相关的蛋白质的表达.
结论:
- 整合素相关激酶 (ILK) 在预防血管内皮细胞中氧化LDL (oxLDL) 诱导的亡方面发挥着重要的调节作用.
- 调节ILK活性为预防动脉样硬化中内皮细胞损伤提供了潜在的治疗策略.
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