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MicroRNAs (miRNAs/miRs), which are endogenous non-coding single-stranded RNAs 19-25 nucleotides in length, regulate gene expression by blocking translation or transcription repression. The present study revealed that miR-3160-5p was widely expressed in prostate cancer cells by reverse transcription-quantitative polymerase chain reaction. There was a negative association between the expression of miR-3160-5p and F-box and WD repeat domain containing 8 (Fbxw8) in prostate cancer DU145 cells. A luciferase activity assay was used to verify that Fbxw8 is the target of miR-3160-5p. In the present study, using MTT assay and cell cycle analysis, it was demonstrated that DU145 cell proliferation was repressed and the cell cycle was arrested in the G 2 /M cell cycle phase with upregulation of miR-3160-5p. Subsequent studies demonstrated that miR-3160-5p regulated the progression of the cell cycle in DU145 prostate cancer cells when the expression levels of phosphorylated cell division cycle (CDC)2, CDC25C and cyclin B1 were directly inhibited. Taken together, these findings revealed the mechanism underlying the role of miR-3160-5p in regulating the proliferation of DU145 cells and indicated that miR-3160-5p may serve as a promising novel therapeutic tool for prostate cancer.

Prostate cancer cell proliferation is suppressed by microRNA‑3160‑5p via targeting of F‑box and WD repeat domain containing 8