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卡铂联合trail对肺癌a549细胞增殖和凋亡的影响

Keywords: 卡铂,tnf相关凋亡诱导配体,a549,增殖,凋亡

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Abstract:

?目的:观察卡铂联合tnf相关凋亡诱导配体(trail)对人肺腺癌细胞a549增殖和凋亡的影响。方法:经20、40、80μg/ml卡铂和100ng/μltrail单用或联用处理后,用mts法检测a549细胞的增殖能力,在光镜下观察细胞形态学变化;并采用流式细胞术检测细胞凋亡情况;rt-pcr和westernblot法检测死亡受体4(dr4)、死亡受体5(dr5)、survivin和x连锁凋亡抑制蛋白基因(xiap)mrna与蛋白表达的变化。结果:卡铂和trail单用或联用均可浓度依赖性抑制a549细胞的增殖,诱导其凋亡,两药联用比单用卡铂时抑制率和凋亡率更高(p<0.05)。单用卡铂或trail可使a549细胞数减少,漂浮细胞增多,出现明显的凋亡形态变化,且明显降低survivin和xiap的mrna和蛋白表达水平(p均<0.05);但对a549细胞dr4和dr5mrna表达均无明显影响,而单用卡铂或trail却能升高a549细胞dr5蛋白的表达(p<0.05)。与单用组相比,trail与卡铂联用a549细胞凋亡形态变化更明显,可明显降低a549细胞survivin和xiapmrna和蛋白的表达水平及升高dr5蛋白表达水平(p<0.05)。结论:卡铂与trail联用可协同抑制肺癌细胞a549细胞增殖,促进其凋亡,且与卡铂能够增加a549细胞dr5蛋白的表达和降低survivin及xiap的表达相关。

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