Using a murine adenocarcinoma cell line transfected to express carcinoembryonic antigen (CEA, MC38-CEA), Chakraborty et al. (2003) demonstrated in vitro that irradiation enhanced the surface expression of two molecules involved in T cell-mediated immune attack, Fas/CD95 and ICAM-1, in a dose-dependent manner. Here, CEACAM5 is linked to adenocarcinoma.