Western blotting was carried out as described previously 49 (link),50 (link). Primary antibodies included antibodies against Twist1 (ab50887), Foxa1 (ab23738), c-Fos (ab53036, Abcam, Cambridge, MA), E-cadherin (610182, BD Bioscience, San Jose, CA), Vimentin (5741), c-Jun (9165), HA (3724, Cell Signaling, Danvers, MA) and β-actin (Sigma, St Louis, MO) and horseradish peroxidase (HRP) conjugated secondary antibody (Bio-rad, Hercules, CA) were used in the study.