摘要
目的观察高密度脂蛋白(HDL)和载脂蛋白AI(apoAI)在保护血管内皮细胞拮抗低密度脂蛋白(LDL)损伤方面的作用。方法细胞形态观察、计数细胞成活率、测定乳酸脱氢酶(LDH)释放百分比和6-酮-前列环素F_(1α)(6-keto-PGF_(1α))。结果预加入HDL或apoAI(100μg/ml),细胞再受到较大剂量(1500μg/ml)的LDL损伤时,不发生显著形态变化,细胞成活率由25.0%(LDL组)提高到91.8%(HDL+LDL组)和89.7%(apoAI+LDL组);细胞膜的完整性增强,LDH释放百分比由72.0%±5.5%(LDL组)降至26.8%±3.4%(HDL+LDL组)和29.4%±4.5%(apoAI+LDL组);促进细胞自身分泌前列环素,使6-keto-PGF_(1α)的含量由7.8±1.4μg/ml(LDL组)增至16.5±4.3μg/ml(HDL+LDL组)和14.2+1.9μg/ml(apoAI+LDL组)。结论在拮抗LDL损伤时,apoAI和HDL在维持细胞形态、保持细胞膜完整性以及增加细胞自身分泌等方面作用近似。
Objective The protective effects of high density lipoprotein(HDL) and apolipoprotein AI(apoAI) on the morphology and function of human umbilical vein endothelial cells(EC) injured by low density lipoprotein(LDL) were studied. Methods EC morphology was observed and lactate dehydrogenase(LDH) release and 6-keto-prostaglandin F_(1α)(PGF_(1)) level were measured.Results When apoAI or HDL was added to culture media before LDL injury the EC showed normal morphology.LDH release decreased from 72.0%±5.5%(LDL group) to 26.8%±3.4%(HDL+LDL group) and 29.4%+4.5%(apoAI+LDL group).PGF_(1α) level increased from 7.8±1.4μg/ml(LDL group) to 16.5±4.3μg/ml(HDL+LDL group)and 14.2±1.9μg/ml (apoAI+LDL group).Conclusions These results indicated that apoAI as well as HDL may play an important role in combating atherogenesis.
出处
《中华老年医学杂志》
CAS
CSCD
北大核心
1996年第1期33-35,共3页
Chinese Journal of Geriatrics
基金
国家自然科学基金
老年医学学科资助
关键词
内皮
脂蛋白类
低密度
高密度
动脉硬化
endothelial cells
low density lipoprotein
high density lipoprotein
atherosclerosis