Western blot was performed as previously described by our group (31 (link)) using the following primary antibodies: VIM (rabbit polyclonal, dilution 1:3,000, catalog number 10366-1-AP, ProteinTech, Manchester, UK), CDH1 (mouse monoclonal, Clone 36, dilution 1:500, catalog number 610182, BD Transduction Laboratories, San Jose, CA, USA) and α-actin (mouse monoclonal, Clone C4, dilution 1:1,000, catalog number 691001, MP Biomedicals, Solon, OH, USA). Antibody binding was revealed by incubation with anti-mouse (rabbit polyclonal, dilution 1:5,000, catalog number A9044, Sigma-Aldrich, Merk Merck Life Science, Madrid, Spain) or anti-rabbit (goat polyclonal, dilution 1:5,000, catalog number sc-2004, Santa Cruz Biotechnology, Dallas, TX, USA) IgG peroxidase conjugate secondary antibodies. Protein expression was assessed using HPR Chemiluminescent Substrate Reagent Kit (catalog number WP20005, Invitrogen, Thermo Fisher Scientific) and ChemiDoc (BIO-RAD, Hercules, CA, USA).