目的：：研究过表达ALEX1对乳腺癌MCF-7细胞增殖和凋亡的影响。方法：将重组慢病毒LV5-ALEX1及阴性对照LV5-NC分别感染乳腺癌MCF-7细胞。感染72 h后，采用实时定量PCR和Western blot分别检测感染后ALEX1的表达情况；感染24、48、72、96 h，CCK8法检测细胞增殖情况；感染72 h后，流式细胞术检测细胞凋亡情况。结果：感染72 h后细胞ALEX1 mRNA表达水平明显上升(165.81±12.14 vs 52.29±2.32，P＜0.01），实验组与对照组相比，细胞增殖受到明显抑制，细胞凋亡率明显增加(20.55％±2.50％vs 3.60％±1.614％，P＜0.05）。结论：过表达ALEX1能明显抑制乳腺癌MCF-7细胞的增殖并诱导细胞发生凋亡。
Effect of overexpression ALEX1 on proliferation and apoptosis
Objective:To investigate the effects of ALEX1 overexpression on cell proliferation and apoptosis of human breast cancer cell line MCF-7.Methods: MCF-7 cells were infected recombinant lentivirus LV5-ALEX1 and the negative control lentivirus LV5-NC,respectively.After 72 h, the expression of ALEX1 was detected by Real-Time PCR and Western blot.CCK8 assay were performed to observe the proliferation ability after 24 h, 48 h, 72 h, 96 h.The effect of overexpression ALEX1 on apoptosis was determined by flow cytometry.The level of Bax,BCL-2 and active caspase3 was detected by Western blot.Results:The mRNA level of ALEX1 markedly increased after 72 h(165.81±12.14 vs 52.29±2.32,P<0.01).In CCK8 assay,the results revealed that the cell pro-liferation was inhibited compared with control group in 48 h,72 h,96 h( P<0.05).The results revealed that overexpression of ALEX1 enhanced MCF-7 apoptosis(20.55%±2.50 % vs 3.60%±1.614%,P<0.05).The results by Western blot showed that the protein levels of Bax and active caspase were increased in LV5-ALEX1 group compared with LV5-NC group.However,the protein levels of BCL-2 was decreased in LV5-ALEX1 group compared with LV5-NC group.Conclusion:Overexpression of ALEX1 significantly reduced MCF-7 cancer cells proliferation and induced MCF-7 cells apoptosis.
Breast cancerMCF-7 cellsCell proliferationApoptosis
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