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葡萄籽原花青素对AGEs诱导的内皮细胞分泌NO及ET-1的影响 被引量:6

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摘要 目的观察葡萄籽原花青素(GSP)对糖基化终产物(AGEs)诱导的人脐静脉内皮细胞(HUVEC)一氧化氮(NO)、内皮素(ET-1)生成及其mRNA表达的影响。方法牛血清白蛋白(BSA)与葡萄糖在体外共同孵育以制备糖基化终产物(AGE-BSA),将培养的HUVEC与不同浓度的GSP(5、15、25μg/ml)预孵育4h,再加入200μg/mlAGE-BSA共同培养,分别用硝酸还原酶法及放免法测定培养上清液中NO及ET-1的含量,用逆转录PCR(RT-PCR)检测一氧化氮合酶(eNOS)及ET-1 mRNA的表达,用激光共聚焦显微镜检测细胞内活性氧簇(ROS)的产生。结果HUVEC用AGE-BSA刺激后明显增强细胞内ROS产生,并能减少内皮细胞NO的分泌及eNOS mRNA的表达,增加内皮细胞ET-1的分泌及其 mRNA的表达(P<0.01)。而GSP预孵育则对AGE-BSA诱导的上述作用具有显著的改善作用,并呈剂量依赖性(P<0.01)。结论GSP可能通过抑制细胞内氧化应激而影响AGEs诱导的内皮细胞NO及ET-1生成,改善血管内皮功能,这对于防治糖尿病慢性血管并发症具有重要的意义。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2007年第12期1148-1151,共4页 Chinese Journal of Gerontology
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参考文献9

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