逆转录病毒介导的SHP-1基因在乳腺癌MDA-MB-231细胞中的表达

目的 构建逆转录病毒表达载体pLNCX2-SHP-1.获取重组逆转录病毒.并将SHP-1基因转导入乳腺癌MDA-MB-231细胞株.方法 采用RT-PCR方法从高表达SHP-1的人乳腺癌细胞株MCF-7中克隆出SHP-1基因全长cDNA,构建重组逆转录病毒表达载体pLNCX2-SHP-1,通过脂质体介导将其转染入包装细胞系PT67,G418筛选建立稳定产病毒的细胞株,将病毒感染人乳腺癌细胞MDA-MB-231.采用Western blotting方法检测SHP-1基因在MDA-MB-231细胞中的表达情况.结果 成功构建重组逆转录病毒表达载体pLNCX2-SHP-1,转染包装细胞PT67,筛选出对G418具有稳定抗性的克隆PT67/SHP-1,获取重组逆转录病毒上清液,并感染人乳腺癌细胞MDA-MB-231.从蛋白水平证实,感染后的MDA-MB-231有SHP-1基因的表达.结论 将SHP-1基因定向克隆入逆转录病毒载体的方法可成功获取重组逆转录病毒,感染MDA-MB-231细胞得到稳定表达SHP-1基因MDA-MB-231/SHP-1,为进一步研究奠定了基础.

Retrovirus-mediated SHP-1 gene expression in human breast cancer MDA-MB-231 cells

Objective To construct a retrovirus-mediated expression system carrying human SHP-1 gene to transfer SHP-1 gene in human breast cancer MDA-MB-231 cells. Methods The full-length SHP-1 gene fragment was amplified by RT-PCR from the total RNA extracted from human breast cancer cell line MCF-7 over-expressing SHP-1 protein. The gene fragment was inserted into the vector pLNCX2 to construct the recombinant retroviral plasmid,which was transfected into the packaging cell PT67 via Lipofectamine2000. A cell line st...