Fig. 6: LIF is the direct target gene of both miR-140-3p and miR-335.

A Bioinformatic analysis predicted that LIF was the potential direct target gene of both miR-140-3p and miR-335. B, C qRT-PCR analysis showed that miRNA inhibitors increased the expression level of LIF, while miRNA mimics suppressed the expression level of LIF. D, F Western blot results showed the expression level of LIF after transfecting with miRNA inhibitors or miRNA mimics in PC3 cells. E, G Dual-luciferase reporter assays revealed that both miR-140-3p and miR-335 could bind to the 3′ UTR of LIF, and could suppress the luciferase ability. H Pearson correlation analyses showed that both miR-140-3p and miR-335 in PCa tissues (n = 30) were negatively correlated with LIF. Error bars represent the SD of three independent experiments. **P < 0.01; ***P < 0.001; ns nonsignificant.