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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)

A Phase 2 Randomized Clinical Study of MK-4280A (Coformulated Favezelimab [MK-4280] Plus Pembrolizumab [MK-3475]) Versus Physician's Choice Chemotherapy in PD-(L)1-refractory, Relapsed or Refractory Classical Hodgkin Lymphoma (KEYFORM-008)

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05508867
Enrollment
203
Registered
2022-08-19
Start date
2022-10-18
Completion date
2026-01-08
Last updated
2026-09-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hodgkin Lymphoma

Keywords

Programmed Cell Death-1 (PD1, PD-1), Programmed Cell Death 1 Ligand 1 (PDL1, PD-L1), Programmed Cell Death 1 Ligand 2 (PDL2, PD-L2)

Brief summary

Researchers are looking for a way to treat classical Hodgkin lymphoma (cHL) that is relapsed (the cancer has come back after treatment) or refractory (current treatment has stopped working to slow or stop cancer growth). Researchers want to learn if people who receive coformulated favezelimab/pembrolizumab (MK-4280A) live longer without the cancer getting worse compared to those who receive chemotherapy.

Interventions

Coformulated favezelimab/pembrolizumab (800 mg/200 mg), IV infusion

DRUGbendamustine

IV infusion

DRUGgemcitabine

IV infusion

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Has histologically confirmed diagnosis of classical Hodgkin lymphoma (cHL) that is 2-fluorodeoxyglucose-avid (FDG-avid). * Has relapsed (defined as disease progression after most recent therapy) or refractory (defined as failed to achieve CR or PR to most recent therapy) cHL and exhausted all available treatment options with known clinical benefit. * Has progressed on treatment with an anti-PD-(L)1 monoclonal antibody (mAb) administered either as monotherapy or in combination with other checkpoint inhibitors or other therapies. * Submits an archival (≤5 years) or newly obtained tumor tissue sample which has not been previously irradiated.

Exclusion criteria

* Diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy or any other form of immunosuppressive therapy. * History of central nervous system (CNS) metastases or active CNS involvement. * Has an active autoimmune disease that has required systemic treatment in past 2 years except replacement therapy. * History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease. * Has an active infection requiring systemic treatment. * History of hemophagocytic lymphohisticytosis. * Has an active seizure disorder that is not well controlled. * Has clinically significant (ie, active) cardiovascular disease. * Received prior systemic anticancer therapy including investigational agents within 4 weeks before randomization. * Received prior radiotherapy within 2 weeks of start of study intervention or radiation related toxicities requiring corticosteroids. * Has not adequately recovered from major surgical procedure. * Known additional malignancy that is progressing or has required active treatment within the past 3 years. * History of human immunodeficiency virus (HIV). * Has had an allogeneic hematopoietic stem cell or solid organ transplantation within the last 5 years.

Design outcomes

Primary

MeasureTime frameDescription
Progression Free Survival (PFS) Per Lugano Response Criteria as Assessed by InvestigatorUp to approximately 34 monthsPFS was defined as the time from randomization to the first documented disease progression per Lugano criteria 2014 as assessed by investigator or death due to any cause, whichever occurred first. Progressive disease was defined as uptake moderately or markedly higher than the liver with an increase in overall uptake compared with nadir, and/or the appearance of new lesions consistent with lymphoma.

Secondary

MeasureTime frameDescription
Overall Survival (OS)Up to approximately 34 monthsOS was defined as the time from randomization to death due to any cause.
Objective Response Rate (ORR) Per Lugano Response Criteria as Assessed by InvestigatorUp to approximately 34 monthsORR was defined as the percentage of participants who achieved a complete response (CR) or partial response (PR) per Lugano criteria 2014 as assessed by investigator. CR or PR were evaluated using computed tomography (CT) and metabolic imaging (fluorodeoxyglucose-positron emission tomography (FDG-PET)). CR is complete metabolic (no/minimal FDG uptake) and radiologic response (target lesions regress to ≤1.5 cm in longest transverse diameter of a lesion) and no new lesions. PR is partial metabolic (moderate/high FDG uptake) and radiologic response (≥50% decrease in sum of product diameters for multiple lesions of up to 6 target measurable nodes and extranodal sites, no increase in lesions, and spleen regressed by \>50% in length beyond normal).
Duration of Response (DOR) Per Lugano Response Criteria as Assessed by InvestigatorUp to approximately 34 monthsFor participants who demonstrated CR or PR per Lugano criteria 2014 as assessed by investigator, DOR was defined as the time from the first documented evidence of CR or PR until disease progression or death due to any cause, whichever occurred first. CR or PR were evaluated using computed tomography (CT) and metabolic imaging (fluorodeoxyglucose-positron emission tomography (FDG-PET)). CR is complete metabolic (no/minimal FDG uptake) and radiologic response (target lesions regress to ≤1.5 cm in longest transverse diameter of a lesion) and no new lesions. PR is partial metabolic (moderate/high FDG uptake) and radiologic response (≥50% decrease in sum of product diameters for multiple lesions of up to 6 target measurable nodes and extranodal sites, no increase in lesions, and spleen regressed by \>50% in length beyond normal).
Number of Participants Who Experienced At Least One Adverse Event (AE)Up to approximately 28 monthsAn AE was any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who experienced an AE is presented.
Number of Participants Who Discontinue Study Treatment Due to an AEUp to approximately 28 monthsAn AE was any untoward medical occurrence in a clinical study participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who discontinued study treatment due to an AE is presented.

Countries

Argentina, Australia, Belgium, Brazil, Canada, Chile, China, Czechia, France, Germany, Israel, Mexico, Poland, South Korea, Spain, Sweden, Switzerland, Turkey (Türkiye), United Kingdom, United States

Contacts

STUDY_DIRECTORMedical Director

Merck Sharp & Dohme LLC

Participant flow

Recruitment details

Participants with programmed cell death 1 (PD-1) protein- or programmed cell death ligand 1 (PD-L1) \[PD-(L)1\]-refractory, relapsed or refractory classical Hodgkin lymphoma were recruited to receive the coformulation favezelimab/pembrolizumab (MK-4280A) or physician's choice chemotherapy (gemcitabine or bendamustine).

Pre-assignment details

Participants were randomized 1:1 to receive favezelimab/pembrolizumab or physician's choice chemotherapy (gemcitabine or bendamustine). Participants assigned to gemcitabine or bendamustine could cross over to favezelimab/pembrolizumab if crossover phase criteria were met. Per protocol, response/progression or adverse events (AEs) that occurred after the switchover to favezelimab/pembrolizumab were not counted towards efficacy outcome measures or safety outcome measures, respectively.

Baseline characteristics

Characteristic
Age, Continuous44.7 Years
STANDARD_DEVIATION 17.8
Ethnicity (NIH/OMB)
Hispanic or Latino
18 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
74 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants
Prior Autologous Stem Cell Transplant Status (auto-SCT)
No
96 Participants
Prior Autologous Stem Cell Transplant Status (auto-SCT)
Yes
107 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
28 Participants
Race (NIH/OMB)
Black or African American
6 Participants
Race (NIH/OMB)
More than one race
2 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
159 Participants
Sex/Gender, Customized
Female
45 Participants
Sex/Gender, Customized
Male
58 Participants
Sex/Gender, Customized
Undifferentiated
1 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
15 / 10414 / 997 / 52
other
Total, other adverse events
93 / 10485 / 9741 / 52
serious
Total, serious adverse events
25 / 10427 / 979 / 52

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 2, 2026