Expanded Access Treatment with [Lu-177]-PNT2002 for Adult Patients with Prostate-Specific Membrane Antigen (PSMA)-Positive Metastatic Castration-Resistant Prostate Cancer (mCRPC)

The purpose of this program is to provide access to \[Lu-177\]-PNT2002 to patients who have been diagnosed with prostate-specific membrane antigen (PMSA)-positive castration-resistant prostate cancer (mCRPC). Patients must have received at least 1 prior androgen pathway inhibitor (ARPI) and cannot be treated by currently available drugs or clinical trials. In this program participants will be administered \[Lu-177\]-PNT2002 intravenously every 8 weeks (about every 2 months) for 4 cycles, or 8 months of total treatment. During treatment, participants will be monitored with routine laboratory tests such as: * Hematology blood tests * Clinical Chemistry blood tests * Testosterone/Prostate Antigen levels blood test * Vital signs * Imaging * ECG