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药学学报  2015 

间尼索地平通过rho/rock通路抑制5-羟色胺诱导的大鼠肺动脉平滑肌细胞增殖

, PP. 824-829

Keywords: 间尼索地平,5-羟色胺,肺动脉平滑肌细胞,增殖,rho激酶

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Abstract:

探讨rho/rock通路在5-羟色胺(5-ht)诱导的大鼠肺动脉平滑肌细胞(pasmcs)增殖中的作用以及间尼索地平(m-nis)对此的影响。组织贴块法原代培养大鼠pasmcs;噻唑蓝(mtt)比色法观察1μmol·l-15-ht作用不同时间对大鼠pasmcs增殖的影响以及m-nis的干预作用;westernblot及rt-pcr等方法检测5-ht作用下大鼠pasmcs增殖中rhoa、rock1mrna和p-mypt1蛋白表达的变化以及m-nis对此的影响,深入探讨其作用机制。结果显示:1μmol·l-15-ht作用12~72h可明显诱导大鼠pasmcs增殖(p<0.05或p<0.01);m-nis(1×10-5、1×10-6、1×10-7和1×10-8mol·l-1)均可明显抑制5-ht诱导的大鼠pasmcs增殖,并呈现一定的浓度依赖性(p<0.05或p<0.01);另外,不同浓度m-nis还明显抑制了5-ht诱导的rhoa和rock1mrna的表达以及rock的活化(p<0.05或p<0.01)。结果表明rho/rock通路在5-ht诱导的大鼠pasmcs增殖中起重要作用,m-nis明显抑制了5-ht诱导的大鼠pasmcs增殖,该作用可能与其抑制rho/rock通路有关。

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