TGFB1 and gastric cancer: We found that TGF‐β1 could induce vimentin, Trop2, and β‐catenin protein expression in two GC cell lines (MGC803 and BGC823), whereas knockdown Trop2 in EMT model GC cell lines could downregulate vimentin and β‐catenin protein expression compared to the control group (Figure 2G).