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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/study/NCT06629779




Registration number
NCT06629779
Ethics application status
Date submitted
10/09/2024
Date registered
8/10/2024
Date last updated
8/07/2025

Titles & IDs
Public title
A Study to Learn How PF-06821497 (Mevrometostat) Works in Men With Metastatic Castration-resistant Prostate Cancer.
Scientific title
A PHASE 3, RANDOMIZED, DOUBLE BLIND, PLACEBO CONTROLLED STUDY OF PF-06821497 (MEVROMETOSTAT) WITH ENZALUTAMIDE IN METASTATIC CASTRATION RESISTANT PROSTATE CANCER (MEVPRO-2)
Secondary ID [1] 0 0
2024-511652-40-00
Secondary ID [2] 0 0
C2321003
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Metastatic Castration-Resistant Prostate Cancer 0 0
Condition category
Condition code
Cancer 0 0 0 0
Prostate

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - PF-06821497
Treatment: Drugs - Placebo
Treatment: Drugs - Enzalutamide

Experimental: Arm A - Participants will receive PF-06821497 (875 mg) BID (twice daily) + enzalutamide 160 mg QD (once daily)

Active comparator: Arm B - Participants will receive Placebo BID (twice daily) + enzalutamide 160 mg QD (once daily)


Treatment: Drugs: PF-06821497
Oral continuous

Treatment: Drugs: Placebo
Oral continuous

Treatment: Drugs: Enzalutamide
Oral continuous

Intervention code [1] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Radiographic Progression Free Survival (rPFS)
Timepoint [1] 0 0
Randomization up to approximately 3 years
Secondary outcome [1] 0 0
Overall survival (OS)
Timepoint [1] 0 0
Randomization up to approximately 5 years
Secondary outcome [2] 0 0
To demonstrate that PF-06821497 in combination with enzalutamide is superior to placebo in combination with enzalutamide in prolonging TTPP
Timepoint [2] 0 0
Randomization up to approximately 3 years
Secondary outcome [3] 0 0
Duration of Response (DoR) in measurable soft tissue disease
Timepoint [3] 0 0
Randomization up to approximately 3 years.
Secondary outcome [4] 0 0
Time to prostate specific antigen (PSA) progression.
Timepoint [4] 0 0
Randomization up to approximately 3 years
Secondary outcome [5] 0 0
Prostate Specific Antigen Response
Timepoint [5] 0 0
Randomization up to approximately 3 years.
Secondary outcome [6] 0 0
Time to initiation of antineoplastic therapy.
Timepoint [6] 0 0
Randomization up to approximately 3 years.
Secondary outcome [7] 0 0
Time to initiation of cytotoxic chemotherapy.
Timepoint [7] 0 0
Randomization up to approximately 3 years
Secondary outcome [8] 0 0
Time to first symptomatic skeletal event
Timepoint [8] 0 0
Randomization up to approximately 3 years.
Secondary outcome [9] 0 0
Progression free survival on next line of therapy
Timepoint [9] 0 0
Randomization up to approximately 3 years
Secondary outcome [10] 0 0
Incidence of Adverse Events
Timepoint [10] 0 0
Randomization up to approximately 5 years
Secondary outcome [11] 0 0
To assess circulating tumor DNA (ctDNA) at baseline and on treatment to evaluate tumor burden.
Timepoint [11] 0 0
Baseline up to approximately 3 years.
Secondary outcome [12] 0 0
To evaluate the PK of PF-06821497 when dosed with enzalutamide
Timepoint [12] 0 0
Cycle 1 Day 15 to last PK draw at Cycle 6 Day 1 (cycle length is 28 days)
Secondary outcome [13] 0 0
Change from baseline in patient reported pain symptoms per Brief Pain Inventory-Short Form (BPI-SF)
Timepoint [13] 0 0
Randomization up to approximately 5 years
Secondary outcome [14] 0 0
Change from baseline in BPI-SF Item 3 (Worst Pain) at Cycle 7 Day 1 (Week 25)
Timepoint [14] 0 0
Randomization up to Week 25
Secondary outcome [15] 0 0
Change from baseline in health-related quality of life (HRQoL) per Functional Assessment of Cancer Therapy - Prostate (FACT-P)
Timepoint [15] 0 0
Randomization up to approximately 5 years
Secondary outcome [16] 0 0
Change from baseline in patient reported health status per European Quality of Life 5-Dimension 5 Level (EQ-5D-5L)
Timepoint [16] 0 0
Randomization up to approximately 5 years
Secondary outcome [17] 0 0
Symptomatic toxicity as measured by items from the Patient-Reported Outcome CTCAE (PRO-CTCAE)
Timepoint [17] 0 0
Randomization up to approximately 5 years
Secondary outcome [18] 0 0
Time to definitive deterioration in patient-reported health related quality of life (HRQoL) per FACT-P
Timepoint [18] 0 0
Randomization up to approximately 5 years

Eligibility
Key inclusion criteria
* Histologically or cytologically confirmed adenocarcinoma of the prostate without small cell features.
* Metastatic disease in bone documented on bone scan, or in soft tissue documented on CT/MRI scan.
* Progressive disease in the setting of medical or surgical castration.
* ECOG performance status 0 or 1, with a life expectancy of =12 months as assessed by the investigator.
Minimum age
18 Years
Maximum age
No limit
Sex
Males
Can healthy volunteers participate?
No
Key exclusion criteria
* Any medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that make the participant inappropriate for the study.
* Known history of active inflammatory gastrointestinal disease, chronic diarrhea, or previous gastric resection or lap-band surgery.
* Clinically significant cardiovascular disease.
* Known or suspected brain metastasis or active leptomeningeal disease or clinically significant history of seizure.
* Any history of myelodysplastic syndrome, acute myeloid leukemia, or any other prior malignancy with a few exceptions.
* Participants must be treatment naïve at the mCRPC stage, eg, no cytotoxic chemotherapy, radio-ligand therapy (i.e. 177Lu- PSMA-617), CDK4/6 inhibitors, 5-alpha reductase inhibitors for prostate cancer in any setting, androgen receptor signaling inhibitors (ARSi) including enzalutamide, apalutamide, darolutamide, poly ADP-ribose polymerase (PARP) monotherapy or other systemic anti-cancer treatment with the following exceptions:

1. Treatment with first-generation antiandrogen (ADT) agents;
2. Docetaxel treatment is allowed for mCSPC, as long as no signs of failure, or disease progression occurred during treatment or within 3 months of treatment completion.
* Previous administration with an investigational product (drug or vaccine) within 30 days or 5 half-lives preceding the first dose of study intervention (whichever is longer).
* Inadequate organ function.

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Parallel
Other design features
Phase
Phase 3
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Recruiting
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
Recruitment outside Australia
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Funding & Sponsors
Primary sponsor type
Commercial sector/industry
Name
Pfizer
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Pfizer CT.gov Call Center
Address 0 0
Pfizer
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Pfizer CT.gov Call Center
Address 0 0
Country 0 0
Phone 0 0
1-800-718-1021
Fax 0 0
Email 0 0
Contact person for scientific queries

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
Yes
What data in particular will be shared?
Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.
When will data be available (start and end dates)?
Available to whom?
Available for what types of analyses?
How or where can data be obtained?
IPD available at link: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests


What supporting documents are/will be available?

No Supporting Document Provided


Results publications and other study-related documents

No documents have been uploaded by study researchers.