Western blotting was performed as described previously (21 (link)). The following antibodies were used: Rabbit antibodies against HNF-4α (cat. no. ab201460; Abcam), E-cadherin (cat. no. 24E10; Cell Signaling Technology, Inc.), N-cadherin (cat. no. 13116; Cell Signaling Technology, Inc.), β-catenin (cat. no. 8480; Cell Signaling Technology, Inc.), phosphorylated (P)-p65 (cat. no. 3033; Cell Signaling Technology, Inc.), p65 (cat. no. 8242; Cell Signaling Technology, Inc.), P-STAT3 (cat. no. ab76315; Abcam), P-AKT (cat. no. ab38449; Abcam), AKT (cat. no. ab8805; Abcam) and β-actin monoclonal antibody (cat. no. HRP-60008; Proteintech Group, Inc.); mouse antibodies against STAT3 (cat. no. ab119352; Abcam).