钩藤碱对AngⅡ诱导大鼠血管平滑肌细胞增殖的抑制作用

被引:14
作者
李艳菊
孙安盛
余丽梅
吴芹
机构
[1] 遵义医学院药理学教研室
关键词
钩藤碱; 血管平滑肌细胞; 血管紧张素Ⅱ; 一氧化氮; c-myc mRNA; NOS mRNA; 大鼠高血压相关基因-1; 增殖;
D O I
暂无
中图分类号
R285.5 [中药实验药理];
学科分类号
摘要
目的研究钩藤碱(rhynchophylline,Rhy)对血管紧张素Ⅱ(angiotensinⅡ,AngⅡ)诱导大鼠血管平滑肌细胞(vascular smooth muscle cells,VSMCs)增殖的抑制作用及机制。方法采用细胞计数法和MTT比色法检测Rhy对AngⅡ诱导大鼠VSMCs增殖的影响;测定Rhy对AngⅡ作用的VSMCs上清液一氧化氮(nitric oxide,NO)含量和一氧化氮合酶(constitutive nitric oxide synthase,cNOS)活性的影响;实时定量聚合酶链式反应(RT-PCR)检测VSMCs中c-myc、NOS和高血压相关基因-1(hypertension related gene-1,rHRG-1)mRNA的表达。结果Rhy(3×10-6~3×10-7mol.L-1)呈浓度依赖性地抑制AngⅡ诱导大鼠VSMCs的增殖,升高细胞上清液中NO的含量和NOS活性,降低c-myc mRNA,升高rHRG-1和NOS mRNA的表达。结论Rhy明显抑制AngⅡ诱导大鼠VSMCs的增殖,机制可能与增加VSMCs中NOS活性并促进NO的合成和释放以及下调c-myc、上调NOS和rHRG-1 mRNA的表达有关。
引用
收藏
页码:1621 / 1624
页数:4
相关论文
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