177Lu-J591 and 177Lu-PSMA-617 Combination for mCRPC

Phase I dose escalation study with combination of 177Lu-J591 and 177Lu-PSMA-617 using a dose-fractionated regimen will be performed in patients with documented progressive metastatic CRPC. The cumulative 177Lu-J591 dose for each subject will be 2.7 GBq/m2 (73 mCi/m2) of 177Lu with 20 mg J591 and the cumulative 177Lu-PSMA-617 dose for each subject will vary (depending on the Cohort) from 3.7 GBq (100 mCi) to 18.5 GBq (500 mCi). The 177Lu-PSMA-617 dose will be escalated in up to 6 different dose levels (3+3 dose-escalation study / de-escalation design). For the phase II portion, a minimum number of 14 patients will be enrolled at MTD (including those enrolled at MTD in Phase I) and a maximum of 24.