ADXS31-142 Alone and in Combination With Pembrolizumab (MK-3475) in Participants With Previously Treated Metastatic Castration-Resistant Prostate Cancer (mCRPC)

Part A of the study will be an open-label, Phase 1, multicenter, non-randomized, dose-determining trial of ADXS31-142 monotherapy in participants with mCRPC. The dose determining phase is intended to select a recommended Phase 2 dose (RP2D) for Part B. Part B of the study will be an open-label, Phase 1-2, multicenter, non-randomized dose-determining trial of ADXS31-142 in combination with pembrolizumab (MK-3475) in participants with mCRPC. Part B will consist of a dose-determination phase followed by an expansion cohort phase. The dose-determining phase is intended to select an RP2D for the combination. Dose escalation/de-escalation for this study will be explored by applying the modified toxicity probability interval design.