TNFSF10 and colon carcinoma: Nevertheless, the overall level of apoptosis induction in clearCa-22 after combined exposure to TRAIL and IR was rather low (maximal decrease of cell number: 46.8±1.5% of the control) when compared with the effects observed in a colon carcinoma cell line (Ravi et al, 2001) and in different clones of Jurkat cells (Belka et al, 2001; Kim et al, 2001a).