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Showing 1–12 of 12 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: MK-4280A Clear all
Completed Phase 1Phase 2 Interventional Results available

Substudy 02C: Safety and Efficacy of Pembrolizumab in Combination With Investigational Agents or Pembrolizumab Alone in Participants With Stage III Melanoma Who Are Candidates for Neoadjuvant Therapy (MK-3475-02C/KEYMAKER-U02)

NCT04303169
View directory record Official record
Conditions
Melanoma
Interventions
Pembrolizumab, Vibostolimab, Gebasaxturev, MK-4830, Favezelimab + Pembrolizumab, ATRA
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 120 Years
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
11
States / cities
Los Angeles, California • Santa Monica, California • Aurora, Colorado + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Withdrawn Phase 1Phase 2 Interventional

A Study of Pembrolizumab in Combination With Investigational Agents in Pediatric and Young Adult Participants With Hematologic Malignancies or Solid Tumors (MK-9999-01B/LIGHTBEAM-U01)

NCT06395090
View directory record Official record
Conditions
Neoplasm Metastasis
Interventions
Pembrolizumab, Favezelimab, Favezelimab/Pembrolizumab, Vibostolimab, Pembrolizumab/Vibostolimab
Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
Up to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
9
States / cities
New Haven, Connecticut • Iowa City, Iowa • Kansas City, Missouri + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Sep 2, 2026, 7:10 AM EDT
Completed Phase 2 Interventional Results available

A Study of Coformulated Favezelimab/Pembrolizumab (MK-4280A) Versus Physician's Choice Chemotherapy in PD-(L)1-refractory, Relapsed or Refractory Classical Hodgkin Lymphoma (MK-4280A-008)

NCT05508867
View directory record Official record
Conditions
Hodgkin Lymphoma
Interventions
favezelimab/pembrolizumab, bendamustine, gemcitabine
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
203 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
16
States / cities
Tucson, Arizona • Los Angeles, California • Torrance, California + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Completed Phase 3 Interventional Results available

A Study of Coformulated Favezelimab/Pembrolizumab (MK-4280A) Versus Standard of Care in Subjects With Previously Treated Metastatic PD-L1 Positive Colorectal Cancer (MK-4280A-007)

NCT05064059
View directory record Official record
Conditions
Colorectal Cancer
Interventions
favezelimab/pembrolizumab, regorafenib, TAS-102
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
441 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
15
States / cities
Washington D.C., District of Columbia • Marietta, Georgia • Louisville, Kentucky + 11 more
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

A Study of Efficacy and Safety of Pembrolizumab Plus Enfortumab Vedotin (EV) +/- Investigational Agents in First-Line Metastatic Urothelial Carcinoma (mUC) (MK-3475-04B/KEYMAKER-U04)

NCT05845814
View directory record Official record
Conditions
Metastatic Urothelial Carcinoma, Urothelial Neoplasms
Interventions
Coformulated favezelimab/pembrolizumab, Coformulated vibostolimab/pembrolizumab, EV, Pembrolizumab
Biological · Combination Product
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
390 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
14
States / cities
La Jolla, California • Orange, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Sep 2, 2026, 7:10 AM EDT
Recruiting Phase 3 Interventional

Long-term Safety and Efficacy Extension Study for Participants With Advanced Tumors Who Are Currently on Treatment or in Follow-up in a Pembrolizumab (MK-3475) Study (MK-3475-587/KEYNOTE-587)

NCT03486873
View directory record Official record
Conditions
Solid Tumors, Hematologic Malignancies
Interventions
Pembrolizumab, Standard of Care (SOC), Lenvatinib, Olaparib, MK-4280, MK-4280A, Pembrolizumab (+) Berahyaluronidase alfa
Drug · Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2043
U.S. locations
65
States / cities
Tucson, Arizona • Bakersfield, California • Fresno, California + 56 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Completed Phase 2 Interventional

Study of Favezelimab Coformulated With Pembrolizumab (MK-4280A) in Participants With Selected Solid Tumors (MK-4280A-010)

NCT06036836
View directory record Official record
Conditions
Solid Tumor, Cutaneous Squamous Cell Carcinoma, Endometrial Cancer
Interventions
favezelimab/pembrolizumab, pembrolizumab, lenvatinib
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
163 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
8
States / cities
New Haven, Connecticut • Boston, Massachusetts • New Brunswick, New Jersey + 5 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Substudy 03B: A Study of Immune and Targeted Combination Therapies in Participants With Second Line Plus (2L+) Renal Cell Carcinoma (MK-3475-03B/KEYMAKER-U03)

NCT04626518
View directory record Official record
Conditions
Carcinoma, Renal Cell
Interventions
Pembrolizumab, MK-4830, Belzutifan, Lenvatinib, Pembrolizumab/Quavonlimab, Favezelimab/Pembrolizumab
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
370 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
11
States / cities
San Francisco, California • New Haven, Connecticut • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Safety and Efficacy Study of Investigational Agents as Monotherapy or in Combination With Pembrolizumab (MK-3475) for the Treatment of Extensive-Stage Small Cell Lung Cancer (ES-SCLC) in Need of Second-Line Therapy (MK-3475-B98/KEYNOTE-B98)

NCT04938817
View directory record Official record
Conditions
Small Cell Lung Carcinoma
Interventions
coformulation pembrolizumab/quavonlimab, lenvatinib, MK-4830, coformulation favezelimab/pembrolizumab, R-DXd
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2029
U.S. locations
12
States / cities
Gilbert, Arizona • Atlanta, Georgia • Fort Wayne, Indiana + 7 more
Source: ClinicalTrials.gov public record
Updated May 31, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Completed Phase 1Phase 2 Interventional

Substudy 02B: Safety and Efficacy of Pembrolizumab in Combination With Investigational Agents or Pembrolizumab Alone in Participants With First Line (1L) Advanced Melanoma (MK-3475-02B/KEYMAKER-U02)

NCT04305054
View directory record Official record
Conditions
Melanoma
Interventions
Pembrolizumab, Vibostolimab, Pembrolizumab/Quavonlimab, Lenvatinib, Favezelimab/Pembrolizumab, ATRA
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 120 Years
Enrollment
335 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
15
States / cities
Los Angeles, California • Santa Monica, California • Aurora, Colorado + 11 more
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Evaluation of Co-formulated Pembrolizumab/Quavonlimab (MK-1308A) Versus Other Treatments in Participants With Microsatellite Instability-High (MSI-H) or Mismatch Repair Deficient (dMMR) Stage IV Colorectal Cancer (CRC) (MK-1308A-008/KEYSTEP-008).

NCT04895722
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Pembrolizumab, Pembrolizumab/Quavonlimab, Pembrolizumab/Favezelimab, Pembrolizumab/Vibostolimab, MK-4830
Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
302 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
11
States / cities
Orange City, Florida • Athens, Georgia • Chicago, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Sep 2, 2026, 7:10 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Substudy 03A: A Study of Immune and Targeted Combination Therapies in Participants With First Line (1L) Renal Cell Carcinoma (MK-3475-03A)

NCT04626479
View directory record Official record
Conditions
Carcinoma, Renal Cell
Interventions
Pembrolizumab, Favezelimab/Pembrolizumab, Belzutifan, Lenvatinib, Pembrolizumab/Quavonlimab, Vibostolimab/Pembrolizumab
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 120 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
10
States / cities
San Francisco, California • New Haven, Connecticut • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Sep 2, 2026, 7:10 AM EDT