ACTA1 and gastric cancer: Consistent with our ELISA data, addition of PDGF BB and TGF β1 significantly enhanced the protein expression level of TGF β1 and PDGF BB mutually in GC cells by western bolts, meanwhile, PDGF BB and TGF β1 could also upregulate the expression level of Vimentin and α-SMA in GC cells, which might induce epithelial-mesenchymal transition in GC cells (Fig. S1g).