SNAI1 and cholangiocarcinoma: In this study, we showed that TGF-β induced EMT, that miR-30e was downregulated by TGF-β, and that miR-30e was predicted by bioinformatics analyses (TargetScan, TarBase, miRNA.org and MiRBase) to directly target the Snail 3′UTR, which we confirmed in CCA cells using Luciferase reporter assay.