Fig. 1

Expression of CD70 and ICOSL following tumor cell irradiation. a CD70 expression (black line). b ICOSL expression (black line). c 4-1BBL expression (black line) 48 post-IR in HCT116 cells. Isotype control stained cells were all less than 5 % positive (filled grey histogram). d CD70 and ICOSL expression in treated and untreated SW620, WiDr, HT-29 and Colo205 cells. Experiments repeated two and three times with similar results