Survivin反义RNA/HSP70双基因对MCF-7细胞的影响

目的 探讨survivin反义RNA/HSP70双基阂转染对乳腺癌细胞系MCF-7的影响.方法 将已成功获得的双基因载体(pIRES2-EGFP-survivin反义RNA/HSP70)用脂质体介导转染乳腺癌细胞系MCF-7,转染72 h,收集各组细胞,用倒置荧光显微镜观察并证实转染是否成功;采用real-time PCR方法检测细胞内survivin基因mRNA水平的表达变化;用Western blotting检测细胞HSP70蛋白表达变化;应用Annexin-V-cy5/7AAD双染后流式细胞术检测细胞凋亡率.结果 转染双基因载体与转染空载体的乳腺癌细胞系MCF-7于倒置荧光显微镜下可见绿色荧光;将转染双基因载体的MCF-7细胞与转染空载体的MCF-7细胞和未转染的MCF-7细胞相比,survivin mRNA表达水平降低,并有效诱导细胞发生凋亡,而HSP70蛋白表达升高.结论 Survivin反义RNA与HSP70双基因转染成功;survivin反义RNA能干扰MCF-7内源survivin的表达,诱导细胞凋亡;HSP70能上调MCF-7细胞HSP70蛋白的表达.

Effects of survivin antisense RNA and HSP70 double gene transfection on MCF-7 cells in vitro

Objective To explore the effects of survivin antisense RNA and HSP70 double gene transfection on breast cancer cell line MCF-7. Methods MCF-7 cells was transfected with the double-gene vector pIRES2-EGFP-survivin antisense RNA/HSP70 via liposome. After a 72-h transfection, the cells were collected for observation under inverted fluorescent microscope. The changes of survivin mRNA and HSP70 protein expressions in the cells were detected with real-time PCR and Western-blot before and after the cell transfecti...