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NCT04821622PHASE3ACTIVE_NOT_RECRUITING

Study of Talazoparib With Enzalutamide in Men With DDR Gene Mutated mCSPC

TALAPRO-3: A PHASE 3, RANDOMIZED, DOUBLE-BLIND, STUDY OF TALAZOPARIB WITH ENZALUTAMIDE VERSUS PLACEBO WITH ENZALUTAMIDE IN MEN WITH DDR GENE MUTATED METASTATIC CASTRATION-SENSITIVE PROSTATE CANCER

Sponsor: Pfizer + Astellas Pharma Inc

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Key Facts

Study type
INTERVENTIONAL
Conditions
Prostate Cancer
Interventions
talazoparib plus enzalutamide, Placebo plus enzalutamide
Enrollment
599 participants
Primary completion
Feb 2026
Study completion
Aug 2027
First posted
Mar 2021
Last updated
Apr 2026

Primary Endpoints (CT.gov)

radiological Progression-Free Survival

Time frame: randomization up to 3 years

Secondary Endpoints

Overall Survival

Objective response in measurable soft tissue disease

Duration of response in measurable soft tissue disease

Eligibility Criteria

Inclusion Criteria: 1. Male participants at least 18 years of age at screening (20 years for Japan, 19 years for Republic of Korea). 2. Histologically or cytologically confirmed adenocarcinoma of the prostate without neuroendocrine differentiation, small cell or signet cell features. If the participant does not have a prior histological diagnosis, a baseline de novo biopsy must be used to confirm the diagnosis and may also be used to support biomarker analysis. 3. Confirmation of DDR gene mutation status by prospective or historical analysis (with sponsor pre-approval) of blood (liquid biopsy) and/or de novo or archival tumor tissue using FoundationOne Liquid CDx or FoundationOne CDx. 4. Willing to provide tumor tissue when available (de novo or archived) for retrospective molecular profiling analysis, if not already provided as part of inclusion criterion 3. 5. Unless prohibited by local regulations or ethics committee decision, consent to a saliva sample collection for retrospective

Read full criteria on CT.gov →

✦ Analyst Commentary

Expert commentary on why this trial matters and what to watch for.

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Source

Open on ClinicalTrials.gov

Related Program

Talazoparib (Talzenna) — TALAPRO-3

Pfizer

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