Study Evaluating Dosimetry, Randomized Dose Optimization, Dose Escalation and Efficacy of Ac-225 Rosopatamab Tetraxetan in Participants With PSMA PET-Positive Castration-Resistant Prostate Cancer (CRPC)

Summary

This is a four-part study evaluating the safety and efficacy of a PSMA-directed radioantibody (rosopatamab tetraxetan, conjugated to either In-111 or Ac-225). Part 1 will consist of one administration of In-111-rosopatamab tetraxetan to characterize the biodistribution of the radioantibody to target organs and prostate cancer lesions. Participants then will be enrolled into either Part 2 (Dose Optimization) or Part 3 (Dose Escalation and Expansion) depending on their prior treatment history. Part 4 will be an extended regimen in dose escalation and expansion.

Shortened from the sponsor's brief summary. View official record on ClinicalTrials.gov

Conditions studied

• PSMA PET-Positive Castration-Resistant Prostate Cancer

Eligibility basics and study details

Study type

Interventional

Phase

Phase 2

Ages

18 years and older

Sex

Male

Healthy volunteers

Not accepted

Sponsor

Convergent Therapeutics

Last updated on ClinicalTrials.gov

October 2, 2026

These are the basic criteria only. The full inclusion and exclusion criteria are on the official record, and the study team decides who can take part.

US recruiting sites