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Study details
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KEYMAKER-U04 Substudy 04D: A Clinical Study of New Treatments Given With Enfortumab Vedotin and Pembrolizumab in People With Urothelial Cancer (MK-3475-04D/KEYMAKER-U04)

Merck Sharp & Dohme LLC
NCT IDNCT07232602ClinicalTrials.gov data as of Apr 2026
Phase

Phase 1/2

Ages

18+

Locations

3 sites in CA, OH, UT

What this study is about

This Phase 1/Phase 2 study is testing Pembrolizumab in people with bladder cancer. The primary outcome being measured is Number of Participants Who Discontinue Study Treatment Due to an AE.

Simplified from trial records by PatientMatch.

Participation Burden

What's physically and logistically required of participants.

Logistics & Travel
In-person visits

Requires travel to a study site

Physical Intervention
Injection / IV

How treatment is administered

Treatment Assignment
Standard assignment

Assignment is predetermined by the study protocol.

Extracted study details

Pulled from the trial record to show what is being tested and what the study is measuring.

Drug classes

pembrolizumab (Immune checkpoint inhibitor; blocks PD-1 to boost T-cell attack on cancer)

Drug routes

infusion

Endpoints

Primary: Number of Participants Who Discontinue Study Treatment Due to an AE, Number of Participants Who Experience a Dose Limiting Toxicity (DLT), Number of Participants Who Experience an Adverse Event (AE), Objective Response Rate (ORR) as Assessed by Investigator

Secondary: Duration of Response (DOR) as Assessed by Investigator, Plasma Cmax of EV Free Payload, Plasma Cmax of MK-3120 Free Payload, Serum Cmax of EV ADC, Serum Cmax of EV TAb, Serum Cmax of MK-3120 Total Antibodies (TAb), Serum Maximum Concentration (Cmax) of MK-3120 Antibody-Drug Conjugate (ADC)

Body systems

Oncology