MiR-425-5p promotes tumor progression via modulation of CYLD in gastric cancer

OBJECTIVE: MicroRNAs (miRNAs) have emerged as important gene regulators and are recognized as key players in carcinogenesis. The present study investigated the role of miR-425-5p in the development and progression of gastric cancer (GC). PATIENTS AND METHODS: The miR-425-5p level in GC tissues and cells was assayed by qRT-PCR. Then, the effects of miR-425-5p expression on the biological behavior of GC cells were investigated. Analysis of target protein expression was determined by Western blotting. Bioinformatic prediction and luciferase assays were employed to identify the predicted miRNA which regulates CYLD. RESULTS: miR-425-5p was found to be up-regulated in GC tissues and cell lines. Knockdown of miR-425-5p in GC cells attenuated migration and invasion of GC cells, whereas overexpression of miR-425-5p promoted cell migration and invasion. The luciferase assay demonstrated that CYLD was a direct target of miR-425-5p. Furthermore, the miR-425-5p level was inversely correlated with levels of CYLD in Western blotting assay. CONCLUSIONS: Our findings indicate that miR-425-5p may contribute to the progression of GC through a mechanism involving CYLD, suggesting that miR-425-5p may have the potential to be a novel important alternative therapeutic target for GC.