Tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) has attractedmuch attention because of its ability to kill tumour cells. In this study, we demonstrated that treatment of QGY-7703 cells with the combination of TRAIL and etoposide resulted in synergistic cytotoxic effects. In dissecting the mechanism underlying this syner-gistic effect, we found that treatment with etoposide alone resulted in the upregulation of Bax, while the level of trun-catedBid (tBid)wasunchanged.
