Abstract
Cullin 4A (CUL4A), as a well-defined oncogene, has been reported to be upregulated in ovarian cancer clinically. However, the biological functions of CUL4A and the molecular mechanism underlying its upregulation in ovarian cancer remains unknown throughly. Here, we show that expression of CUL4A is significantly higher in ovarian cancer tissues compared to corresponding non-cancerous tissues. Moreover, silencing of CUL4A by siRNA markedly inhibits cell proliferation, invasion and epithelial-mesenchymal transition (EMT). We identified CUL4A as a novel target gene of miR-494. Further investigations showed that miR-494 was remarkably downregulated and correlated with poor prognosis in ovarian cancer. Overexpression of miR-494 inhibited proliferation, migration, invasion and EMT of ovarian cancer cells by directly suppressing CUL4A expression. Therefore, our findings indicate that miR-494/CUL4A axis is important in the control of ovarian cancer tumorigenesis.
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