Figure 4.
DNA-PKcs promoted EMT and invasion partly via TGF-β1/Smad signaling. (A and B) The numbers of cells invading through a Transwell membrane and migrating into a scratch wound were significantly increased after TGF-β1 stimulation and reduced following LY2109761 inhibition. In addition, blocking the Smad3 pathway and downregulating DNA-PKcs caused a significant decrease in cell migration and invasion in SCL-1 cells. (C–H) TGF-β1 treatment activated p-Smad2/3 signaling in SCL-1 cells. In addition, the knockdown of DNA-PKcs decreased the p-Smad3 levels. LY2109761 could repress p-Smad3 expression and restore the E-cadherin levels, while mesenchymal markers Vimentin and Slug were decreased. *p<0.05, **p<0.01 vs the NC group. #p<0.05, vs the group transfected with si-Ctrl.