中文摘要：

目的 观察转染Zbtb7a基因对人胃癌细胞系SGC7901增殖及凋亡的影响,并探讨其机制.方法 将pcDNA3.1-Zbtb7a和pSilencer 3.1-H1-mk用Lipofectamine2000转染SGC7901细胞,采用RT-PCR和Western Blot法检测MK mRNA及蛋白表达,CCK-8试剂盒和平板克隆法检测细胞增殖,流式细胞仪Annexin V-PI染色检测细胞凋亡.结果 转染Zbtb7a后,SGC7901细胞中MK表达水平明显升高,细胞增殖能力明显增强（P＜0.05）,并且0.5ng/mL TRAIL诱导的细胞凋亡受到抑制（P＜0.05）.Zbtb7a高表达后干扰MK的表达,细胞增殖及克隆能力则明显降低（P＜0.05）,TRAIL诱导的细胞凋亡数也明显增加（P＜0.05）.结论 Zbtb7a可以通过上调MK的表达,促进SGC-7901细胞增殖以及抑制TRAI诱导的细胞凋亡.

英文摘要：

Objective To observe the effect of Zbtb7 a gene transfer on the proliferation and apoptosis of human gastric cancer cells SGC7901 and to explore its mechanism.Methods The recombinant plasmids pcDNA3.1-zbtb7a and pSilencer 3.1-H1-mk were transfected into the SGC7901 cells by using Lipofectamine2000.The mRNA and protein expression of MK was determined by RT-PCR and Western blotting,respectively.The cell proliferation was measured by CCK-8 kit and colony formation assay.The apoptosis was detected by flow cytometry using annexin V and propidium iodide staining.Results After Zbtb7a gene transfer,the expression of MK and cell proliferation of SGC7901 cells were enhanced,and 0.5 ng/mL TRAIL-induced apoptosis was inhibited （all P 〈 0.05）.The high expression of Zbtb7a gene interfered the MK expression,which decreased the cell proliferation and enhanced the 0.5 ng/mL TRAIL-induced apoptosis （all P 〈0.05）.Conclusion Zbtb7a can promote proliferation and suppress TRAIL-induced apoptosis of human gastric cancer cells SGC7901 by up-regulating MK expression.