C11_VWF were characterized by co‐expressing marker genes of fibroblasts (COL1A1, FAP, VIM, ACTA2) and endothelial cells (VWF, PECAM1, CLDN5, FLT1, RAMP2), which resembled a subgroup of cells undergoing an EMT transition in gastric cancer.44 This evidence concerns the gene CLDN5 and gastric cancer.