Cell viability assays were performed as described [18]. For the combination experiments, after 72 hours the media was removed from the ONC201 treated wells and replaced with fresh media containing a vehicle control or one of three doses of rhTRAIL. 4 hours later, cellular viability was quantitated using the CellTiter-Glo luminescent cell viability assay (Promega) according to the manufacturer’s instructions. GraphPad Prism software was used to generate dose-response curves.
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