目的 探讨miR-375在前列腺癌(PCa)细胞中的表达、作用及机制.方法 培养细胞,转染质粒,Transwell分析PCa细胞的迁移和侵袭;qPCR分析miR-375、KLF4 mRNA在PCa细胞中的表达;Western blot分析KLF4蛋白在PCa细胞中的表达;生物信息学分析miR-375的靶基因,双荧光素酶实验验证.结果 miR-375在PCa中高表达,抑制miR-375的表达显著抑制PCa细胞的迁移和侵袭;通过生物信息学分析miR-375的潜在靶基因含有KLF4,双荧光素酶实验验证KLF4为miR-375的靶基因;KLF4在PCa细胞中表达显著降低,抑制miR-375的表达能够显著促进KLF4蛋白的表达;进一步研究表明抑制KLF4表达可逆转miR-375抑制物对PCa细胞的迁移侵袭的抑制作用.结论 miR-375抑制KLF4的表达促进PCa的迁移和侵袭,发挥癌基因的作用;其可以作为PCa的治疗靶点,为PCa的治疗提供新的方向.%Objective To explore the expression,role and mechanism of miR-375 in prostate cancer (PCa) cells.Methods PCa cells were cultured and transfected with plasmid,the migration and invasion of PCa were detected by Transwell;the expression of miR-375 and KLF4 mRNA were detected by qPCR;the expression of KLF4 were detect by Western blot;the potential target genes of miR-375 were analyzed by bioinformatics and verified by dual luciferase report.Results The expression of miR-375 were significantly up-regulated in the PCa;Inhibited the expression of miR-375 could significantly inhibit the migration and invasion of PCa cells.KLF4 was the potential target genes of miR-375,which verified through bioinformatics analysis and dual luciferase report.The expression of KLF4 were significantly down-regulated in the PCa.Inhibited the expression of miR-375 could significantly up-regulated the expression of KLF4.Inhibited the KLF4 expression was able to reverse the suppressive effect miR-375 has on the migration and invasion of PCa cells.Conclusion miR-375 promotes the migration and invasion of PCa via inhibiting the expression of KLF4 and play the oncogene role.MiR-375 can be used as therapeutic targets for PCa,and provide a new direction for the treatment of PCa.
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