Abstract: Prostate cancer(PCa) is a common malignant tumor of urinary tract in males. MicroRNAs (miRNAs) modulate expression of target genes, which involved in the regulation of tumorigenes, invasion and metastasis process. In recent studies, many miRNAs play a role of oncogenes or tumor suppressor genes，which regulate cell proliferation, apoptosis, invasion and migration.

Key words: microRNA, prostate cancer, oncomiRNA, tumorigenes, tumor progression