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RecruitingInterventionalPhase 3

A Phase 3, Open-label Study of Ifinatamab Deruxtecan Versus Docetaxel in Participants With Metastatic Castration-Resistant Prostate Cancer (mCRPC) (IDeate-Prostate01)

NCT ID: NCT06925737Sponsor: Merck Sharp & Dohme LLCLast updated: 2026-06-16

Summary

Researchers are looking for new ways to treat metastatic castration-resistant prostate cancer (mCRPC). Researchers have designed a study medicine called ifinatamab deruxtecan (also called I-DXd or MK-2400) to treat mCRPC. The goal of this study is to learn if people who receive I-DXd live longer overall and live longer without the cancer growing or spreading than people who receive chemotherapy.

Arms & interventions

  • DrugIfinatamab deruxtecan

    Administered via intravenous (IV) infusion every 3 weeks (q3w) until disease progression, unacceptable adverse events (AEs), or other cessation of treatment

  • DrugDocetaxel

    Administered via IV infusion q3W until disease progression, unacceptable adverse events (AEs), or other cessation of treatment

  • DrugPrednisone

    Oral tablet administered once per day or per approved product label

  • DrugRescue Medication

    Before administering each dose of I-DXd, premedication is required for prevention of nausea and vomiting with a 2 or 3 drug combination regimen (eg, corticosteroids with either a 5-HT3 receptor antagonist or an NK-1 receptor antagonist and other drugs as indicated) per approved product label

Outcome measures

Primary

  • Overall Survival (OS)

    OS is defined as the time from randomization to death due to any cause.

    Time frame: Up to approximately 36 months

  • Radiographic Progression Free Survival (rPFS)

    rPFS is defined as the time from randomization to the first documented disease progression per prostate cancer working group (PCWG)-modifed Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 by blinded independent central review (BICR) or death due to any cause, whichever occurs first.

    Time frame: Up to approximately 36 months

Secondary

  • Time to First Subsequent Therapy (TFST)

    Time frame: Up to approximately 36 months

  • Objective Response Rate (ORR)

    Time frame: Up to approximately 36 months

  • Duration of Response (DOR)

    Time frame: Up to approximately 36 months

  • Time to Pain Progression (TTPP)

    Time frame: Up to approximately 36 months

  • Time to Prostate-specific Antigen (PSA) Progression

    Time frame: Up to approximately 36 months

  • PSA Response Rate

    Time frame: Up to approximately 36 months

  • Time to First Symptomatic Skeletal-Related Event (SSRE)

    Time frame: Up to approximately 36 months

  • Number of Participants Who Experienced at Least One Adverse Event (AE)

    Time frame: Up to approximately 36 months

  • Number of Participants Who Discontinue Study Treatment Due to an Adverse Event (AE)

    Time frame: Up to approximately 36 months

Eligibility criteria

Sex: MaleAge: 18 Years and olderHealthy volunteers: No
Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has histologically- or cytologically-confirmed adenocarcinoma of the prostate without small cell histology * Has prostate cancer progression while on androgen deprivation therapy (ADT) (or post bilateral orchiectomy) within 6 months prior to Screening * Has current evidence of distant metastatic disease (M1 disease) documented by either bone lesions on bone scan and/or soft tissue disease by computed tomography (CT)/magnetic resonance imaging (MRI) * Has received prior treatment with 1 or 2 androgen receptor pathway inhibitors (ARPIs) and progressed during or after at least 8 weeks of treatment * Has provided tumor tissue from a core or excisional biopsy from soft tissue not previously irradiated and obtained after disease progression on the most recent prior therapy * Has recovered from adverse events (AEs) due to previous anticancer therapies Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * Is unable to swallow tablets/capsules * Has any of the following indicators of interstitial lung disease (ILD)/pneumonitis: 1. Has any history of ILD/pneumonitis that required steroid use, except for a history of radiation pneumonitis that did not require steroids 2. Has current ILD/pneumonitis 3. Has a clinical or radiographic suspicion of ILD for which the diagnosis of ILD cannot be ruled out * Has clinically severe pulmonary compromise resulting from intercurrent pulmonary illnesses * Has uncontrolled or significant cardiovascular disease * Has received prior treatment with a taxane-based chemotherapy agent for metastatic castration-resistant prostate cancer (mCRPC) * Has had prior discontinuation of an antibody drug conjugate (ADC) that consists of an exatecan derivative (eg, trastuzumab deruxtecan) due to treatment-related toxicities * Has a "superscan" bone scan

Study locations (50)

Mayo Clinic in Arizona - Phoenix ( Site 0044)

Phoenix, Arizona, 85054

Recruiting
Study Coordinator · Contact

City of Hope Comprehensive Cancer Center ( Site 0049)

Duarte, California, 91010

Recruiting
Study Coordinator · Contact

City of Hope Lennar Foundation Cancer Center ( Site 0059)

Irvine, California, 92618

Recruiting
Study Coordinator · Contact

Moores Cancer Center ( Site 0010)

La Jolla, California, 92093

Recruiting
Study Coordinator · Contact

Cedars-Sinai Medical Center ( Site 0068)

Los Angeles, California, 90048

Recruiting
Study Coordinator · Contact

UCLA Hematology/Oncology - Santa Monica ( Site 0002)

Los Angeles, California, 90404

Recruiting
Study Coordinator · Contact

University of California, Irvine (UCI) Health - UC Irvine Medical Center ( Site 0006)

Orange, California, 92868

Recruiting
Study Coordinator · Contact

Stanford Cancer Center ( Site 0046)

Palo Alto, California, 94304

Recruiting
Study Coordinator · Contact

Rocky Mountain Regional Veterans Affairs Medical Center ( Site 0053)

Aurora, Colorado, 80045

Recruiting
Study Coordinator · Contact

Yale-New Haven Hospital-Yale Cancer Center ( Site 0050)

New Haven, Connecticut, 06510

Recruiting
Study Coordinator · Contact

Veterans Affairs Connecticut Healthcare System ( Site 0062)

West Haven, Connecticut, 06516

Recruiting
Study Coordinator · Contact

The GW Medical Faculty Associates ( Site 0057)

Washington D.C., District of Columbia, 20037

Recruiting
Study Coordinator · Contact

Washington DC Veterans Affairs Medical Center ( Site 0056)

Washington D.C., District of Columbia, 20422

Recruiting
Study Coordinator · Contact

Mayo Clinic in Florida-Mayo Clinic Comprehensive Cancer Center ( Site 0077)

Jacksonville, Florida, 32224

Recruiting
Study Coordinator · Contact

Emory University School of Medicine- Grady Campus ( Site 0103)

Atlanta, Georgia, 30303

Recruiting
Study Coordinator · Contact

Winship Cancer Institute, Emory University ( Site 0003)

Atlanta, Georgia, 30322

Recruiting
Study Coordinator · Contact

Rush University Medical Center-Hematology and Oncology ( Site 0028)

Chicago, Illinois, 60607

Recruiting
Study Coordinator · Contact

University of Illinois at Chicago-University of Illinois Cancer Center ( Site 0063)

Chicago, Illinois, 60612

Recruiting
Study Coordinator · Contact

University of Kentucky Chandler Medical Center ( Site 0048)

Lexington, Kentucky, 40536

Recruiting
Study Coordinator · Contact

Greenebaum Comprehensive Cancer Center ( Site 0021)

Baltimore, Maryland, 21201

Recruiting
Study Coordinator · Contact

Beth Israel Deaconess Medical Center ( Site 0043)

Boston, Massachusetts, 02215

Recruiting
Study Coordinator · Contact

Dana Farber Cancer Institute ( Site 0012)

Boston, Massachusetts, 02215

Recruiting
Study Coordinator · Contact

University of Michigan ( Site 0005)

Ann Arbor, Michigan, 48109

Recruiting
Study Coordinator · Contact

Henry Ford Hospital ( Site 0035)

Detroit, Michigan, 48202

Recruiting
Study Coordinator · Contact

Cancer and Hematology Centers of Western Michigan ( Site 0015)

Grand Rapids, Michigan, 49503

Recruiting
Study Coordinator · Contact

Mayo Clinic in Rochester, Minnesota-Mayo Clinic Comprehensive Cancer Center ( Site 0078)

Rochester, Minnesota, 55905

Recruiting
Study Coordinator · Contact

HealthPartners Cancer Research Center-HealthPartners Frauenshuh Cancer Center ( Site 0032)

Saint Louis Park, Minnesota, 55426

Recruiting
Study Coordinator · Contact

HealthPartners Cancer Center at Regions Hospital ( Site 0052)

Saint Paul, Minnesota, 55101

Recruiting
Study Coordinator · Contact

St. Vincent Frontier Cancer Center-Research ( Site 0037)

Billings, Montana, 59102

Recruiting
Study Coordinator · Contact

Oncology Hematology West, PC dba Nebraska Cancer Specialists - Grand Island ( Site 0076)

Grand Island, Nebraska, 68803

Completed

Oncology Hematology West P.C. dba Nebraska Cancer Specialists ( Site 0026)

Omaha, Nebraska, 68130

Completed

Comprehensive Cancer Centers of Nevada ( Site 0082)

Las Vegas, Nevada, 89148

Recruiting
Study Coordinator · Contact

John Theurer Cancer Center at Hackensack University Medical Center ( Site 0016)

Hackensack, New Jersey, 07601

Recruiting
Study Coordinator · Contact

University of New Mexico Comprehensive Cancer Center ( Site 0022)

Albuquerque, New Mexico, 87131

Recruiting
Study Coordinator · Contact

Icahn School of Medicine at Mount Sinai ( Site 0009)

New York, New York, 10029

Recruiting
Study Coordinator · Contact

Great Lakes Cancer Care ( Site 0047)

Williamsville, New York, 14221

Recruiting
Study Coordinator · Contact

The James Cancer Hospital and Solove Research Institute at The Ohio State University Comprehensive C ( Site 0061)

Columbus, Ohio, 43221

Recruiting
Study Coordinator · Contact

VA Portland Health Care System ( Site 0038)

Portland, Oregon, 97239

Recruiting
Study Coordinator · Contact

Perelman Center for Advanced Medicine ( Site 0067)

Philadelphia, Pennsylvania, 19104

Recruiting
Study Coordinator · Contact

Abramson Cancer Center - Penn Medicine ( Site 0079)

Philadelphia, Pennsylvania, 19106

Recruiting
Study Coordinator · Contact

Memphis VA Medical Center ( Site 0072)

Memphis, Tennessee, 38105

Recruiting
Study Coordinator · Contact

SCRI Oncology Partners ( Site 0074)

Nashville, Tennessee, 37203

Recruiting
Study Coordinator · Contact

Henry-Joyce Cancer Clinic ( Site 0042)

Nashville, Tennessee, 37232

Recruiting
Study Coordinator · Contact

UT Southwestern Medical Center ( Site 0039)

Dallas, Texas, 75390

Recruiting
Study Coordinator · Contact

University of Texas-MD Anderson Cancer Center ( Site 0055)

Houston, Texas, 77030

Recruiting
Study Coordinator · Contact

Blue Ridge Cancer Care ( Site 0024)

Roanoke, Virginia, 24014

Recruiting
Study Coordinator · Contact

VA Puget Sound Health Care System ( Site 0054)

Seattle, Washington, 98108

Recruiting
Study Coordinator · Contact

Fred Hutchinson Cancer Center ( Site 0060)

Seattle, Washington, 98109

Recruiting
Study Coordinator · Contact

University Hospital and UW Health Clinics ( Site 0065)

Madison, Wisconsin, 53792

Recruiting
Study Coordinator · Contact

Medical College of Wisconsin ( Site 0008)

Milwaukee, Wisconsin, 53226

Recruiting
Study Coordinator · Contact
A Clinical Study of Ifinatamab Deruxtecan (I-DXd) in People With Metastatic Prostate Cancer (MK-2400-001) | Cancerify