SNAI1 and lung adenocarcinoma: Indeed, we observed that the reduction or the accumulation of SNAIL protein in human lung adenocarcinoma A549 cells and pancreatic ductal adenocarcinoma Panc-1 cells occurred after treatment with a protein synthesis inhibitor, cycloheximide (CHX) (Figure 1A), or treatment with a proteasome inhibitor, MG132 (Figure 1B), respectively.