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氧化低密度脂蛋白内皮受体在氧化低密度脂蛋白致内皮细胞损伤中的作用

徐雅琴 张钧华 柯杨 宁涛 冯莉雅 唐朝枢

  [摘 要] 目的:探讨血凝素样氧化低密度脂蛋白受体(LOX1)在氧化低密度脂蛋白(ox-LDL)致内皮细胞损伤中的作用。方法:采用倒置相差显微镜观察细胞形态的改变;发色底物法检测内皮细胞培养液中的组织纤溶酶原激活物(t-PA)和纤溶酶原激活物抑制剂(PAI-1)的活性; 反转录聚合酶链反应(RT-PCR)检测LOX1mRNA表达水平。结果:单纯加入ox-LDL,内皮细胞出现胞体收缩,细胞膜破坏等明显的损伤性改变,培养液中PAI-1活性较对照组高3倍(P<0.05),LOX1 mRNA水平表达增高;而当培养液中同时加有LOX1抑制剂polyinosinic acid时,内皮细胞形态损伤不明显,培养液中PAI-1活性低约2.6倍(P<0.05),同时LOX1 mRNA水平降低。结论:LOX1介导了ox-LDL对内皮细胞的损伤,可能在血管损伤性疾病的发生中起重要作用。
  [主题词] 受体,LDL;内皮; 细胞; 纤溶酶原激活物,组织型;抑制素
  [中图分类号] R543;Q513+.5   [文献标识码] A
[文章编号] 1000-4718(2000)10-0897-04

Role of oxidized LDL receptor in endothelial cellular injury
by oxidized low-density lipoprotein

XU Ya-qin
(Institute for Cardiology Vascular Diseases Reaseach ,First Clinical Hospital, )
ZHANG Jun-hua
(Institute for Cardiology Vascular Diseases Reaseach ,First Clinical Hospital, )
KE-Yang
(Institute for Cancer Research ,School of Oncology, Beijing Medical University, Beijing 100034,China)
NING Tao
(Institute for Cancer Research ,School of Oncology, Beijing Medical University, Beijing 100034,China)
FENG Li-ya
(Institute for Cancer Research ,School of Oncology, Beijing Medical University, Beijing 100034,China)
TANG Chao-shu
(Institute for Cardiology Vascular Diseases Reaseach ,First Clinical Hospital, )

  [Abstract] AIM: To explore the role of LOX1 in endothelial cellullar injury by ox-LDL. METHODS: The morphological changes of endothelial cells were observed with inverted phasecontrast microscope; tissue plasminogen activator(t-PA) and plasminogen activator inhibitor-1(PAI-1)activity were measured with chromogenix;LOX1 mRNA expression was detected by reverse transcription-polymerase chain reaction(RT-PCR). RESULTS: Incubation of ox-LDL induced endothelial cells contraction and cellular membrane rupture, increased LOX1 mRNA expression,PAI-1 activity 3 times than control per 24 h per 105(P<0.05),but had onl

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