人AQP1-shRNA表达质粒载体的构建与筛选

Construction and screening of human AQP1 shRNA expression vectors

目的构建针对人水通道蛋白1(AQP1)基因的shRNA表达质粒载体,并验证其干扰效果,为进一步探讨AQP1基因对人乳腺癌细胞的作用及机制建立基础。方法设计合成4对针对人AQP1基因不同位点的shRNA片段,通过DNA重组技术将其插入载体GV115中,构建AQP1-shRNA重组质粒,转染人乳腺癌MCF-7细胞,并通过实时荧光定量PCR(RT-PCR)和Western blot法检测干扰效率。结果 RT-PCR法证实AQP1在乳腺癌MCF-7细胞中有表达。测序验证表明4对靶向AQP1-shRNA表达载体均构建成功。4组干扰载体能够从基因和蛋白表达水平不同程度抑制AQP1表达,其中以AQP1-shRNA 4对AQP1的干扰效率最强。结论成功有效地构建了针对人AQP1基因的shRNA重组质粒,能够有效抑制人乳腺癌细胞MCF-7中AQP1的表达。

Objective To construct and screen effective shRNA expression vectors targeting human AQP1 gene ,and evaluate the interference efficiency of the AQP1 shRNA recombinant plasmids ,thus provide basis for further exploration on the effect and mechanism of AQP1 gene on human breast cancer cells .Methods Four pairs of shRNA sequences targeting human AQP1 gene were designed and synthesized ,and then inserted into the GV115 vector .AQP1 shRNA and control shRNA plasmids were trans‐fected into human breast cancer MCF‐7 cells .The expression of AQP1 mRNA and protein were detected by real time PCR（RT‐PCR） and Western blot to evaluate the interfering efficiency .Results RT‐PCR demonstrated that AQP1 was expressed in human breast cancer MCF‐7 cells .Sequencing showed that the shRNA vectors targeting AQP1 were successfully constructed .48 h after the AQP1 shRNA transfection ,AQP1 mRNA and protein expression levels in MCF‐7 cells were reduced to a significant degree ,and the AQP1 shRNA 4 plasmid vector could inhibit the AQP1 most efficiently .Conclusion The AQP1 shRNA recombinant plasmids vectors were successfully constructed and can significantly inhibit the expression of AQP1 in MCF‐7 human breast cancer cells .