All cell lines (OVCAR3, HeLa, HPAC, BxPC3, AsPC-1, HEK293T) used in the experiments were obtained from American Type Culture Collection (ATCC, Manassas, VA). Recombinant human TRAIL was purchased from Enzo Life Science (formerly BIOMOL, International, Farmingdale, NY). The sigma-2/SMAC drug conjugate SW IV-134 was synthesized as previously reported [40 (link)]. Cell viability was detected using luciferase-based readout (CellTiter-Glo, Promega, Madison, WI). Caspase activation was determined employing Caspase-Glo Assay System (Promega, Madison, WI). The pan-caspase inhibitor Z-VAD-FMK was purchased from Enzo Life Sciences (Ann Arbor, MI).
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