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Study identifier: NCT06549465 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

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)

Condition: PSMA PET-Positive Castration-Resistant Prostate Cancer  ·  Sponsor: Convergent Therapeutics

PhasePhase 2
Planned participants93
Who can joinMale, 18 Years to no upper limit
Healthy volunteersNo

About this study

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. Participants qualifying for Part 2 will be randomized to receive Ac-225 rosopatamab tetraxetan in a single fractionated cycle (dose administration on Day 1 and Day 15) at either 45 or 60 kBq/Kg. Participants qualifying for Part 3 must have received prior Lu-177-PSMA-radioligand therapy and will receive Ac-225 rosopatamab tetraxetan in a single fractionated cycle at 45, 55, or 60 kBq/Kg. Dose limiting toxicities (DLTs) will be monitored in Part 3 to determine the recommended phase 2 dose (RP2D), and the study may enroll additional participants to be treated with the RP2D dose level. Participants qualifying for Part 4 will initially receive two doses (dose administration on Day 1 and Day 15) at the dose level selected in Part 2, followed by a single third dose of Ac-225 rosopatamab tetraxetan administered approximately 12 weeks after completion of the Part 2 fractionated dosing regimen. The starting dose level for Part 4 w…

This description comes directly from the study's public registry record.

Talk to the study team

Study Director  ·  CONVERGE01  ·  CONVERGE01@convergentrx.com

Always discuss trial participation with your own doctor first.

Locations (9)

University of California San DiegoSan Diego, California, United StatesRecruiting
Dana-Farber Cancer InstituteBoston, Massachusetts, United StatesRecruiting
Washington University in St. LouisSt Louis, Missouri, United StatesRecruiting
X Cancer Omaha / Urology Cancer CenterOmaha, Nebraska, United StatesRecruiting
Laura & Isaac Perlmutter Cancer CenterNew York, New York, United StatesRecruiting
Memorial Sloan Kettering Cancer CenterNew York, New York, United StatesRecruiting
New York Presbyterian/Weill Cornell Medical CenterNew York, New York, United StatesRecruiting
Duke University Medical CenterDurham, North Carolina, United StatesRecruiting
The Cleveland Clinic FoundationCleveland, Ohio, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT06549465