Journal
TUMOR BIOLOGY
Volume 35, Issue 10, Pages 9725-9733Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1007/s13277-014-2206-4
Keywords
Prostate cancer; Metastasis; Wnt5a; miR-26a
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MicroRNAs (miRNAs) are small noncoding RNAs that are involved in different biological processes by suppressing target gene expression. miRNA microarray analysis revealed a significant decrease of miR-26a in prostate cancer tissues versus their normal counterparts, but the role of miR-26a is needed to investigate. In the present study, we found that miR-26a expression was lower in prostate cancer tissues compared with their normal controls, so did the prostate cancer cells. Next, by lentivirus-mediated gain-of-function studies, it was showed that stable miR-26a inhibited cell proliferation, metastasis, and epithelial mesenchymal transition and induced G1 phase arrest in prostate cancer. It was predicted that Wnt5a was a potential target gene of miR-26a by bioinformatics analysis. Then, luciferase assay and Western blot analysis identified that Wnt5a was a new direct target gene of miR-26a and miR-26a inhibited prostate cancer progression via Wnt5a. Altogether, the findings suggested that miR-26a may function as a tumor suppressor in prostate cancer by targeting Wnt5a.
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