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蛋白激酶C抑制剂对脂多糖上调内皮细胞PAI-1表达的影响

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摘要 目的探讨脂多糖(LPS)对内皮细胞1型纤溶酶原灭活剂(PAI-1)表达的影响及蛋白激酶C(PKC)抑制剂在其中的可能作用. 方法用RT-PCR法检测PAI-1 mRNA含量,Western印迹检测细胞内PAI-1蛋白含量,ELISA法测定培养上清液中PAI-1抗原含量. 结果 0.01~10.0 μg/ml LPS与ECV304共培养6 h,能刺激PAI-1 mRNA呈剂量依赖性增加;经PKC抑制剂Ro32-0432预处理后,PAI-1 mRNA的表达水平较单纯LPS处理组显著降低,5 μmol/L Ro32-0432预处理组PAI-1 mRNA 水平甚至低于空白对照组.ECV304培养上清液和细胞内PAI-1蛋白的变化与mRNA水平呈平行关系. 结论在ECV304中,一定浓度的LPS可诱导PAI-1高表达,而PKC抑制剂能显著抑制LPS对PAI-1的诱导表达,甚至抑制PAI-1的基础表达水平.
出处 《中国老年学杂志》 CAS CSCD 北大核心 2005年第10期1201-1203,共3页 Chinese Journal of Gerontology
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参考文献12

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二级参考文献2

  • 1黄春,福建医科大学学报,1999年,33卷,39页
  • 2周瑞海,中国现代医学杂志,1997年,7卷,45页

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