The expression of PINX1 is decreased in prostate cancer, and the high level of miRNA-501-5p promotes the proliferation of liver cancer cells. However, there is no relevant research on miRNA-501-5p in prostate cancer. miRNA-501-5p can target the 3’UTR of PINX1 mRNA; however,
it is unclear whether they affect the migration, invasion, and proliferation of prostate cancer cells. In this paper, PCR and Western blot were used to detect the expression of miRNA-501-5p and PINX1 in prostate cancer cells PC3, LNCaP, and DU145, and normal prostate epithelial cells RWPE-1.
Compared to the normal prostate epithelial cells, miRNA-501-5p expression in prostate cancer cells was increased, and the expression of PINX1 was decreased. The methyl thiazolyl tetrazolium assay was used to detect the migration, proliferation, and invasion of prostate cancer DU145 cells.
It was found that suppressing the expression of miRNA-501-5p or overexpressing PINX1 could inhibit the proliferation and other biological behaviors of DU145 cells; at the same time, the level of Cyclin D1, MMP-2, and MMP-14 protein was decreased, and the protein level of P21 was increased.
Moreover, inhibition of PINX1 expression could partially reverse miRNA-501-5p’s inhibitory effect on the migration, invasion, and proliferation of prostate cancer cells. Therefore, miRNA-501-5p targeted PINX1 for down-regulation to promote prostate cancer cell migration, invasion, and
proliferation.
Conversion of Androgen Receptor Signaling From a Growth Suppressor in Normal Prostate Epithelial Cells to an Oncogene in Prostate Cancer Cells Involves a Gain of Function in c-Myc Regulation
