氧化应激
体内
伤口愈合
载脂蛋白B
胆固醇
内分泌学
内科学
内皮干细胞
内皮功能障碍
内皮
医学
血管生成
药理学
化学
生物
体外
生物化学
免疫学
生物技术
作者
Michael Rosenbaum,Pinaki Chaudhuri,Benjamin Abelson,Brandy N. Cross,Linda M. Graham
标识
DOI:10.1016/j.atherosclerosis.2015.06.018
摘要
Objective Endothelial cell (EC) migration is essential for healing of arterial injuries caused by angioplasty, but a high cholesterol diet inhibits endothelial repair. In vivo studies suggest that apolipoprotein A-I (apoA-I), the major protein constituent of HDL, is essential for normal healing of arterial injuries. ApoA-I mimetics, including 4F, have been designed to mimic the amphipathic portion of the apoA-I molecule. This study was undertaken to determine if 4F improves endothelial migration and healing. Methods A razor scrape assay was used to analyze the effect of 4F on EC migration in vitro. Endothelial healing in vivo was assessed following electrical injury of carotid arteries in mice. Markers of oxidative stress were also examined. Results Lipid oxidation products inhibited EC migration in vitro, but preincubation with L-4F preserved EC migration. Endothelial healing of carotid arterial injuries in mice on a high cholesterol diet was delayed compared with mice on a chow diet with 27.8% vs. 48.2% healing, respectively, at 5 days. Administration of D-4F improved endothelial healing in mice on a high cholesterol diet to 43.4%. D-4F administration had no effect on lipid levels but decreased markers of oxidation. In vivo, there was a significant inverse correlation between endothelial healing and plasma markers of oxidative stress. Conclusion These studies suggested that an apoA-I mimetic can improve endothelial healing of arterial injuries by decreasing oxidative stress.
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