CLDN18 and gastric cancer: As in mouse gastric cancer cells, human gastric cancer cells (NUGC4, SNU-719, and SNU-638) stably expressing CLDN18-ARHGAP26 demonstrated a higher degree of migration ability than those expressing an empty vector (Fig. 5b and Supplementary Figs. 15b and 16; P < 0.001, Wilcoxon signed rank test).