Purpose

This study is researching an experimental drug called REGN3767, also known as fianlimab (R3767), when combined with another medication called cemiplimab (each individually called a "study drug" or called "study drugs" when combined) compared with an approved medication called pembrolizumab. The objective of this study is to see if the combination of fianlimab and cemiplimab is an effective treatment compared to pembrolizumab in patients that have had melanoma removal surgery but are still at high risk for the recurrence of the disease. Pembrolizumab is an approved treatment in some countries in this clinical setting. The study is looking at several other research questions, including: - What side effects may happen from receiving the study drugs. - How much study drug is in the blood at different times. - Whether the body makes antibodies against the study drug (which could make the drug less effective or could lead to side effects). Antibodies are proteins that are naturally found in the blood stream that fight infections. - How administering the study drugs might improve quality of life.

Condition

Eligibility

Eligible Ages
Over 12 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  1. All patients must be either stage IIB, IIC, III, or stage IV per American Joint Committee on Cancer (AJCC) 8th edition and have histologically confirmed melanoma that is completely surgically resected in order to be eligible as defined by the protocol 2. Complete surgical resection must be performed within 12 weeks prior to randomization, and enrollment may occur only after satisfactory wound healing from the surgery 3. All patients must have disease-free status documented by a complete physical examination and imaging studies within 4 weeks prior to randomization, as described in the protocol

Exclusion Criteria

  1. Uveal melanoma 2. Any evidence of residual disease after surgery by imaging, pathology, or cytology. 3. Ongoing or recent (within 2 years) evidence of clinically significant autoimmune disease that required treatment 4. Uncontrolled infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C (HCV) infection; or diagnosis of immunodeficiency that is related to, or results in chronic infection, as described in the protocol 5. Another malignancy that is currently progressing or that required active treatment in the past 5 years, as described in the protocol 6. Participants with a history of myocarditis 7. Adolescent patients (≥12 to <18 years old) with body weight <40 kg Note: Other Protocol Defined Inclusion/ Exclusion Criteria Apply

Study Design

Phase
Phase 3
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Fianlimab HD + Cemiplimab
Patients will be administered one combination dose of fianlimab high dose (HD) and cemiplimab
  • Drug: Fianlimab
    Fianlimab will be administered by intravenous (IV) infusion every (Q) 3 weeks
    Other names:
    • REGN3767
  • Drug: Cemiplimab
    Cemiplimab will be administered by IV infusion Q 3 weeks
    Other names:
    • REGN2810
    • Libtayo
Experimental
Fianlimab LD + Cemiplimab
Patients will be administered one combination dose of fianlimab low dose (LD) and cemiplimab
  • Drug: Fianlimab
    Fianlimab will be administered by intravenous (IV) infusion every (Q) 3 weeks
    Other names:
    • REGN3767
  • Drug: Cemiplimab
    Cemiplimab will be administered by IV infusion Q 3 weeks
    Other names:
    • REGN2810
    • Libtayo
Active Comparator
Pembrolizumab
Patients will be administered one dose of pembrolizumab co-infused with saline/dextrose placebo
  • Drug: Pembrolizumab
    Pembrolizumab will be administered by IV infusion Q 3 weeks
    Other names:
    • MK-3475
    • lambrolizumab
    • Keytruda
  • Drug: Placebo
    Matching placebo co-infused with pembrolizumab IV, will be administered by IV infusion Q 3 weeks

Recruiting Locations

Massachusetts General Hospital
Boston, Massachusetts 02114

More Details

Status
Recruiting
Sponsor
Regeneron Pharmaceuticals

Study Contact

Clinical Trials Administrator
844-734-6643
clinicaltrials@regeneron.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.