177Lu-PSMA-R2 in Patients With PSMA Positive Progressive, Metastatic, Castration Resistant Prostate Cancer

Recruitment for PROter A206T-G01-001 (NCT03490838) was halted in Phase I by sponsor decision. Phase II expansion portion of the study was never initiated. Importantly, this recruitment halt was not a consequence of any safety concern. Ongoing patients at the time of recruitment halt continued per protocol and completed the 1 year safety follow-up prior to early study termination. The primary objective of the Phase I portion of the study to assess the safety and tolerability of 177Lu-PSMA-R2 and to assess Dose Limiting Toxicities (DLTs) and determine the maximum tolerated dose (MTD) (if reached) and the recommended Phase II dose was not reached due to early recruitment halt.