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I-131-1095 Radioligand Plus Enzalutamide vs Enzalutamide for mCRPC That Progressed During Abiraterone (ARROW).

NCT03939689 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 120

Last updated 2025-10-14

Study results available
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Summary

This clinical trial was done to show whether a radioactive drug (I-131-1095) that binds to prostate-specific membrane antigen (PSMA) is useful in treating metastatic prostate cancer that is positive for PSMA. The trial enrolled men whose PSMA-positive metastatic prostate cancer had progressed while they were taking abiraterone. During the trial, all of the men took enzalutamide (standard-of-care therapy) once a day. However, some of the men also had up to 4 doses (8 weeks apart) of I-131-1095 (in addition to taking enzalutamide once a day). At specified times during the trial, all of the men had blood tests (to measure levels of prostate-specific antigen \[PSA\]) and imaging studies (to assess tumor status). The two groups of men were then compared in several ways. The main comparison was the percentage of men in each group with at least a 50% decrease in PSA levels. Other comparisons involved the response of the tumors (as seen on imaging) and overall survival. To assess safety, the number of adverse events in both groups were also compared.

Conditions

Interventions

DRUG

I-131-1095

Participants received up to 4 (8-week) cycles of I-131-1095: 100 mCi for the first dose. Subsequent dose(s) were reduced to 75 mCi for participants experiencing any dose-limiting toxicities. The third and fourth therapeutic doses could be reduced to 75 mCi on the basis of dosimetry assessment after administration of 10 mCi of I-131-1095 prior to the third dosing cycle. Participants also received the label dosage of enzalutamide once daily for up to 53 weeks.

DRUG

Enzalutamide

Participants received the label dosage of enzalutamide once daily for up to 53 weeks.

Sponsors & Collaborators

  • Progenics Pharmaceuticals, Inc.

    lead INDUSTRY

Principal Investigators

  • Jean-Claude Provost, MD · Progenics Pharmaceuticals, Inc.

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
MALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-05-30
Primary Completion
2023-09-21
Completion
2024-09-24
FDA Drug
Yes

Countries

  • United States
  • Canada

Study Locations

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Entities

Drugs
Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03939689 on ClinicalTrials.gov