摘要
Abstract
Objective To evaluate the effect of miR‐335 regulate cell proliferation by targeting survivin in breast cancer cells MCF‐7 .Methods (1)Chose breast cancer tissue and para‐carcinoma tissue ,and used RT‐PCR or Western blot to detect the expres‐sion of miR‐335 and survivin protein .(2)Chose breast cancer cells MCF‐7 ,respectively transfected miR‐335 mimic and mimic con‐trol .The expression of miR‐335 and survivin protein were detected by RT‐PCR or Western blot .(3)Chose breast cancer cells MCF‐7 ,respectively co‐transfection wild type survivin 3′‐UTR(survivin‐wt)or mutant type urvivin 3′‐UTR(survivin‐Mut)and miR‐335 mimic or negative control(NC)to breast cancer cells MCF‐7 .The cell luciferase activity were detected by dual‐luciferase report gene experiment .(4)Chose breast cancer cells MCF‐7 ,respectively transfected mimic control ,miR‐335 mimic and miR‐335 mimic+ sur‐vivin .The cell proliferation activity of each group were detected by MTT method .Results (1)Compared with para‐carcinoma tis‐sue ,the miR‐335 expression of breast cancer tissue significantly decreased(P<0 .05) ,and the survivin protein expression of breast cancer tissue significantly increased(P<0 .05) .(2)Compared with transfection mimic control ,transfection miR‐335 mimic can made the miR‐335 expression of MCF‐7 increased(P<0 .05) ,and made the survivin protein expression of MCF‐7 decreased(P<0 .05) . (3)Compared with transfection NC ,co‐transfection miR‐335 mimic and survivin‐wt can made luciferase activity of MCF‐7 signifi‐cantly decreased(P<0 .05) ,but the luciferase activity of MCF‐7 was not significantly changes after co‐transfection miR‐335 mimic and survivin‐Mut (P>0 .05) .(4)Compared with transfection mimic control ,the MCF‐7 proliferative activity significantly decreased after transfection miR‐335mimic(P<0 .05) .Compared with transfection miR‐335 mimic ,the MCF‐7 proliferative activity signifi‐cantly increased after transfection miR‐335 mimic+survivin(P<0 .05) ,but still lower than transfection mimic control(P<0 .05) . Conclusion In breast cancer tissue ,the miR‐335 show low expression ,and survivin show high expression .miR‐335 can target sur‐vivin to inhibit the proliferation activity of breast cancer cells MCF‐7 .关键词
微RNAs/乳腺肿瘤/细胞增殖/miR-335/生存素Key words
microRNAs/breast neoplasms/cell proliferation/miR-335/survivin分类
医药卫生
