C-反应蛋白降低了从人类大动脉内皮细胞中释放的前环素
Senthil Kumar Venugopal1, Sridevi Devaraj, Ishwarlal Jialal
1Laboratory for Atherosclerosis and Metabolic Research, Department of Pathology, University of California Davis Medical Center, Sacramento, Calif, USA.
通过化,C-反应蛋白 (CRP) 通过非活性化PGI2合成酶来减少内皮细胞释放的前列环素 (PGI2),从而促进动脉样硬化.
科学领域:
- 心血管研究研究心血管研究
- 内皮细胞生物学 内皮细胞生物学
- 炎症和动脉新生.
背景情况:
- C-反应蛋白 (CRP) 是动脉样硬化的一个风险标志物和促进者.
- 减少的内皮氧化 (NO) 和前环素 (PGI2) 有助于产生风的状态.
- 之前的研究表明,CRP降低了人类大动脉内皮细胞 (HAEC) 中的内皮NO合成酶.
研究的目的:
- 研究CRP对HAEC和人类冠状动脉内皮细胞 (HCAEC) PGI2释放的影响.
主要方法:
- 在不同度的人类CRP的化过程中,HAEC和HCAEC被化.
- 通过测定其稳定产物PGF-1alpha的释放量来测量前环素 (PGI2) 的释放量.
- 评估了CRP对PGI2合成酶 (PGIS) 质量和化的影响.
主要成果:
- 在基底和刺激条件下,CRP显著降低了HAECs中的PGF-1α释放.
- CRP没有改变PGI2合成酶 (PGIS) 质量.
- CRP增加了PGIS通过过氧酸盐的化,降低了其活性,这种效应被过氧酸盐清除剂逆转.
结论:
- 通过化,CRP通过非活性化PGIS来减少HAECs中的PGI2释放.
- 这种机制有助于CRP的异原体效应.
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