[miRNA-191 promotes proliferation, migration and invasion of prostate cancer by targeting PLCD1]

Objective: To investigate the effects of miRNA-191 on the proliferation, migration and invasion of prostate cancer, and to explore its mechanism. Methods: The expression levels of miRNA-191 in four human prostate cancer cell lines (PC-3, DU-145, LNCa P, 22RU1) and human normal prostate cell line RWPE-2 were detected, and prostate cancer cell line PC-3 was selected as the experimental object. PC-3 cells were divided into three groups: blank control group (no transfection), miRNA-191 NC group (PC-3 cells transfected with Inhibitor NC) and miRNA-191 Inhibitor group (PC-3 cells transfected with miRNA-191 Inhibitor), and each group was provided with three multiple pores. The expression levels of miRNA-191 and PLCD1 were detected by RT-PCR. The cell proliferation was detected by CCK8 assay. Scratch test and invasive test were used to detect cell migration and invasive ability. Through Targetscan target gene prediction website, PLCD1 was screened as the target protein of miRNA-191, and verified by double luciferase target experiment.Western blot assay was used to detect the expression of PLCD1 in cells of each group. Results: Compared with RWPE-2 cells, the expression level of miRNA-191 in human prostate cancer cells was significantly higher (P ＜0.05), and the expression level of miRNA191 in PC-3 was significantly higher than that in other three cell lines (P＜0.05). After inhibiting the expression of miRNA-191, the expression levels of PLCD1 was significantly higher while PC-3 cells' proliferation ability was inhibited, and their migration and invasion ability were significantly lower than those of blank control group and miRNA-191 NC group (P＜ 0.05). The results of double luciferase reporter gene assay showed that PLCD1 gene was a target gene of miRNA-191. Conclusion: miRNA-191 promote the proliferation, migration and invasion of prostate cancer PC-3 cells by targeting PLCD1.