Western blot was performed as described previously [24 (link)].The primary antibodies were purchased from Cell signaling including β-catenin(#8480S), snai2(#9585S), vimentin (#5741S), surviving (#2808S), XIAP(#14334S), cIAP1(#7065S), cIAP2(#3130S), livin (#5471S), cleaved-PARP(#5625S), cleaved-caspase3(#9661S), T-SMAD2/3 (#8685S), P-SMAD2 (#18338S). GAPDH was purchased from Sigma (#G9545) and cytokeratin-7 was purchased from Abcam (#ab181598).