To this end, we first characterized the expression of αvβ6 and αvβ8 in murine cells, such as TS/A mammary adenocarcinoma, WEHI-164 fibrosarcoma, TRAMP-C2 prostate adenocarcinoma, 5M7101/GFP/CEA, and K8484/GFP/CEA pancreatic ductal adenocarcinoma, as well as in human cells, such as BxPC-3 pancreatic ductal adenocarcinoma and 5637 bladder cancer. This evidence concerns the gene CEACAM5 and urinary bladder cancer.