Protective effects of icariin on human umbilical vein endothelial cell injured by angiotensin Ⅱ

淫羊藿苷对血管紧张素Ⅱ诱导人脐静脉内皮细胞损伤的保护作用(英文)

To investigate the effects of icariin （ICA） on angiotensin Ⅱ（Ang Ⅱ）-induced injury in human umbilical vein endothelial cells line （ECV-304）. The ECV-304 cells were cultured in vitro. After 24 h incubating with icariin, the model of AngⅡ-induced injury in ECV-304 was established. The cell viability （MTT method）, Lactate dehydrogenase （LDH） release and Nitric oxide （NO） production in the medium, the capacity of scavenging superoxide anion radicals （O2^-） and hydroxyl radicals （.OH） were measured. The activities of superoxide dismutase （SOD）, total nitric oxide synthase （T-NOS）, inducible nitric oxide synthase （iNOS） and constitutive nitric oxide synthase （cNOS） in the cells were determined. Compared with the Ang Ⅱ-treated group, ICA can significantly raise the viability of EC, increase the activities of SOD, T-NOS and cNOS, increase the production of NO, enhance the capacity of scavenging superoxide anion radicals （ O2^- ） and hydroxyl radicals（.OH）, and lower LDH leakage and iNOS activity. The results suggest that ICA can protect endothelial cells （ECV-304） from Ang II-induced injury.

探讨淫羊藿苷对血管紧张素Ⅱ(AngⅡ)诱导损伤人脐静脉内皮细胞株(ECV-304)的影响。培养内皮细胞,淫羊藿苷作用24h后,采用AngⅡ诱导制备内皮细胞损伤模型,测定细胞存活率(MTT法)、培养液中乳酸脱氢酶(LDH)释放量、NO值、清除超氧阴离子自由基(O2g-)和羟自由基(·OH)的能力,测定胞内超氧化物歧化酶(SOD)活性、T-NOS﹑iNOS以及cNOS的含量。与AngⅡ单独处理组相比,淫羊藿苷能明显提高细胞存活率,提高SOD、T-NOS和cNOS活力,提高NO含量,增强清除O2g-和·OH的能力,降低LDH和iNOS的量。结果表明淫羊藿苷对AngⅡ损伤的内皮细胞有一定的保护作用。