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蟾毒灵诱导人宫颈癌HeLa细胞凋亡的蛋白组学研究

Keywords: 蟾毒灵,HeLa细胞,细胞凋亡,双向电泳,蛋白质组学

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Abstract:

目的:该文通过考察蟾毒灵(bufalin)处理人宫颈癌HeLa细胞株后对细胞蛋白质表达谱的影响,寻找蟾毒灵在HeLa细胞中的可能作用靶点。方法:通过MTT检测细胞活性确定蟾毒灵的IC50,并通过流式细胞术和Hoechst33342染色检测蟾毒灵诱导细胞凋亡。应用蛋白质组学技术寻找差异表达蛋白点并进行鉴定,用Westernblotting试验进行确认。结果:蟾毒灵具有较强的细胞毒作用,IC50(154±21.5)nmol·L-1,可以诱导HeLa细胞发生凋亡。蛋白组学的结果显示蟾毒灵处理组与对照组相比有11个差异表达蛋白,其中9个蛋白点发生了下调;2个蛋白发生了上调。这些蛋白可能是蟾毒灵在HeLa细胞中的作用靶点。Westernblotting分析显示heatshockprotein27,vimentin,HNRPK在蟾毒灵处理后的表达调节结果与双向电泳的结果吻合。结论:蟾毒灵可以诱导人宫颈癌HeLa细胞发生凋亡,其凋亡诱导作用可能是多个靶点蛋白共同参与的结果。

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