Clinical trial No longer in our active list Phase 3 Interventional Ages 12 and up

Combining fianlimab and cemiplimab for treating advanced melanoma

Official title: A Phase 3 Trial of Fianlimab (REGN3767, Anti-LAG-3) + Cemiplimab Versus Pembrolizumab in Patients With Previously Untreated Unresectable Locally Advanced or Metastatic Melanoma

Run by Regeneron Pharmaceuticals · NCT05352672 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing if a new combination of two drugs, fianlimab and cemiplimab, can help teenagers and adults with advanced melanoma feel better compared to a standard treatment.

Quick facts

PhasePhase 3
Study typeInterventional
Ages12 Years and up
SexAll
Enrollment1535 (estimated)
SponsorRegeneron Pharmaceuticals
Industry-sponsored
Drugs / interventionschemotherapy, prednisone, fianlimab, cemiplimab, pembrolizumab
Locations219 sites (La Jolla, California and 218 other locations)
Trial IDNCT05352672 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adolescents and adults aged 12 and older with unresectable Stage III or IV melanoma who have not received prior systemic therapy.

Probably not a fit

Patients with resectable melanoma or those who have previously received systemic therapy for advanced disease may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical study investigates the effectiveness of an experimental drug, fianlimab, in combination with cemiplimab, compared to pembrolizumab in treating unresectable locally advanced or metastatic melanoma in adolescents and adults. The study aims to evaluate the safety, efficacy, and pharmacokinetics of these treatments, as well as the immune response generated against the drugs. Participants will be monitored for side effects and the presence of antibodies against the study drugs. The study includes patients aged 12 and older who have not received prior systemic therapy for their advanced melanoma.

Why it matters

Potential benefit: If successful, this study could provide a new effective treatment option for patients with advanced melanoma.

How similar studies have gone: Other studies have shown promise with similar immunotherapy approaches, suggesting potential for success in this combination treatment.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

1. Age ≥12 years on the date of providing informed consent
2. Patients with histologically confirmed unresectable Stage III and Stage IV (metastatic) melanoma (AJCC, 8th revised edition) who have not received prior systemic therapy for advanced unresectable disease

   1. Patients who received adjuvant and/or neoadjuvant systemic therapies are eligible if they did not have evidence of progression or recurrence of disease and/or discontinued due to occurrence of unmanageable imAEs ≥ grade 3 (with the exclusion of endocrinopathies which are fully controlled by hormone replacement) while on such therapies. Also, patients must have had a treatment-free and disease-free interval of \>6 months. Accrual of these patients is limited to approximately 10% of the total population enrolled.
   2. Patients with acral and mucosal melanomas are eligible. Accrual will be limited to 10% of the total population.
3. Measurable disease per RECIST v1.1

   1. Previously irradiated lesions can only be counted as target lesions if they have been demonstrated to progress and no other target lesion is available
   2. Cutaneous lesions should be evaluated as non-target lesions
4. Performance status:

   1. For adult patients: Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0 or 1
   2. For pediatric patients: Karnofsky performance status ≥70 (patients ≥16 years) or Lansky performance status ≥70 (patients ≤16 years)
5. Anticipated life expectancy of at least 3 months

Key Exclusion Criteria:

1. Uveal melanoma
2. Ongoing or recent (within 2 years) evidence of an autoimmune disease that required systemic treatment with immunosuppressive agents. The following are non-exclusionary: vitiligo, childhood asthma that has resolved, residual hypothyroidism that requires only hormone replacement, psoriasis not requiring systemic treatment.
3. Uncontrolled infection with human immunodeficiency virus (HIV), hepatitis B (HBV) or hepatitis C virus (HCV) infection; or diagnosis of immunodeficiency that is related to, or results in chronic infection
4. Unknown BRAF V600 mutation status as described in the protocol
5. Systemic immune suppression:

   1. Use of immunosuppressive doses of corticosteroids (\>10mg of prednisone per day or equivalent) within 14 days of the first dose of study medication. Physiologic replacement doses are allowed up to and including 10mg of prednisone/day or equivalent. Inhaled or topical steroids are permitted, if they are not for treatment of an autoimmune disorder.
   2. Other clinically relevant forms of systemic immune suppression
6. Treatment with other anti-cancer therapy including immuno- therapy, chemotherapy, major surgery or biological therapy within 21 days prior to the first dose of trial treatment. Adjuvant hormonotherapy used for breast cancer or other hormone-sensitive cancers in long term remission is allowed.
7. History or current evidence of significant (CTCAE Grade ≥2) local or systemic infection (e. g., cellulitis, pneumonia, septicemia) requiring systemic antibiotic treatment within 14 days prior to the first dose of trial medication.
8. Active or untreated brain metastases or spinal cord compression. Patients with leptomeningeal disease are excluded. Patients with known brain metastases are eligible if they:

   1. Received radiotherapy or another appropriate standard therapy for the brain metastases,
   2. Have neurologically returned to baseline (except for residual signs and symptoms related to the CNS treatment) for at least 14 days prior to enrollment
   3. Did not require immunosuppressive doses of corticosteroids therapy (\>10mg of prednisone per day or equivalent) in the 14 days prior to enrollment
   4. Are asymptomatic with a single untreated brain metastasis \<10 mm in size
9. Participants with a history of myocarditis.

Note: Other protocol-defined Inclusion/ Exclusion criteria apply

Where it's running

  • University of California San Diego
    La Jolla, California, United States
    Recruiting
  • The Angeles Clinic and Research Institute
    Los Angeles, California, United States
    Recruiting
  • Miami Cancer Institute
    Miami, Florida, United States
    Recruiting
  • Orlando Health, Inc
    Orlando, Florida, United States
    Recruiting
  • Atlantic Health System - Morristown Medical Center
    Morristown, New Jersey, United States
    Recruiting
  • Cleveland Clinic Foundation
    Cleveland, Ohio, United States
    Recruiting
Show 44 more locations
  • University of Tennessee Medical Center
    Knoxville, Tennessee, United States
    Recruiting
  • Fundacion Cenit para la Investigacion en Neurociencias
    Buenos Aires, Argentina
    Recruiting
  • DIABAID - Instituto de Asistencia Integral en Diabetes
    Buenos Aires, Argentina
    Recruiting
  • Clinica Adventista Belgrano
    Caba, Argentina
    Recruiting
  • Fundacion CENIT Centro Medico de Neurociencias
    Ciudad Autonoma de Buenos Aires, Argentina
    Recruiting
  • Instituto de Oncologia de Rosario
    Rosario, Argentina
    Recruiting
  • Centro Medico San Roque
    San Miguel de Tucuman, Argentina
    Recruiting
  • Calvary North Adelaide Hospital
    Adelaide, Australia
    Recruiting
  • Barwon Health Andrew Love Cancer Centre, University Hospital Geelong
    Geelong, Australia
    Recruiting
  • Icon Cancer Centre Hobart
    Hobart, Australia
    Recruiting
  • The Alfred Hospital
    Melbourne, Australia
    Recruiting
  • The Townsville Hospital and Health Service
    Townsville, Australia
    Recruiting
  • Ballarat Oncology and Haematology Clinical Trials Unit
    Wendouree, Australia
    Recruiting
  • Medical University Innsbruck
    Innsbruck, Tyrol, Austria
    Recruiting
  • Medical University of Graz
    Graz, Austria
    Recruiting
  • University Hospital St. Poelten
    St. Poelten, Austria
    Recruiting
  • Medical University Of Vienna
    Vienna, Austria
    Recruiting
  • Cliniques Universitaires Saint-Luc
    Brussels, Belgium
    Recruiting
  • AZ Groeninge, Campus Kennedylaan
    Kortrijk, Belgium
    Recruiting
  • Clinique et Maternite Sainte-Elisabeth (CMSE)
    Namur, Belgium
    Recruiting
  • AZ Nikolaas
    Sint Niklaas, Belgium
    Recruiting
  • Fundacao Pio XII - Hospital de Amor de Barretos
    Barretos, Brazil
    Recruiting
  • Centro Avancado de Tratamento Oncologico (CENANTRON)
    Belo Horizonte, Brazil
    Recruiting
  • Liga Paranaense de Combate ao Cancer - Hospital Erasto Gaertner
    Curitiba, Brazil
    Recruiting
  • Oncosite Centro De Pesquisa Clinica Em Oncologia
    Ijui, Brazil
    Recruiting
  • Clinica de Neoplasias Litoral/atarina Pesquisa Clínica
    Itajai, Brazil
    Recruiting
  • Instituto Joinvilense De Hematologia E Oncologia
    Joinville, Brazil
    Recruiting
  • Animi Unidade de Tratamento Oncologico Ltda
    Lages, Brazil
    Recruiting
  • Hospital Bruno Born
    Lajeado, Brazil
    Recruiting
  • Hospital Sao Vicente de Paulo (HSVP) Instituto do Cancer
    Passo Fundo, Brazil
    Recruiting
  • Hospital Moinhos de Vento
    Porto Alegre, Brazil
    Recruiting
  • Hospital de Clinicas de Porto Alegre (HCPA)
    Porto Alegre, Brazil
    Recruiting
  • CPO - Centro de Pesquisas em Oncologia
    Porto Alegre, Brazil
    Recruiting
  • Fundacao PIO XII - Hospital de Amor Amazonia
    Porto Velho, Brazil
    Recruiting
  • Instituto COI
    Rio de Janeiro, Brazil
    Recruiting
  • Hospital Sao Rafael
    Salvador, Brazil
    Recruiting
  • INCA - Brazilian National Cancer Institute
    Santo Cristo, Brazil
    Recruiting
  • Fundacao Faculdade Regional de Medicina de Sao Jose do Rio Preto
    Sao Jose do Rio Preto, Brazil
    Recruiting
  • Hemomed
    Sao paulo, Brazil
    Recruiting
  • Hospital Sirio Libanes (HSL)
    Sao Paulo, Brazil
    Recruiting
  • Sao Camilo Oncologia
    Sao Paulo, Brazil
    Recruiting
  • Sunnybrook Research Institute
    Toronto, Ontario, Canada
    Recruiting
  • Royal Victoria Regional Health Centre
    Barrie, Canada
    Recruiting
  • Cross Cancer Institute (CCI)
    Edmonton, Canada
    Recruiting

+169 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.