Clinical trial Phase 3 Interventional Ages 18 and up

A Clinical Study of Intismeran Autogene (V940) Plus Pembrolizumab in People With High-Risk Melanoma (V940-001)

Run by Merck Sharp & Dohme LLC · NCT05933577 · Data updated 2026-11-12

Fully enrolled, still running. This study is not taking new participants. Its registered completion date is 2029-10-26.

The purpose of this study is to learn if intismeran autogene which is an individualized neoantigen therapy (INT; formerly, called messenger ribonucleic acid \[mRNA\]-4157) with pembrolizumab (MK-3475) is safe and prevents cancer from returning in people with high-risk melanoma. Researchers want to know if intismeran autogene with pembrolizumab is better than receiving pembrolizumab alone at preventing the cancer from returning.

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment1089 (estimated)
SponsorMerck Sharp & Dohme LLC
Industry-sponsored
Drugs / interventionsIntismeran autogene, Pembrolizumab, Placebo
Locations165 sites (Argentina, Australia, Belgium, Brazil, Canada, Chile, Colombia, Denmark and more)
Trial IDNCT05933577 on ClinicalTrials.gov

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

The main inclusion criteria include but are not limited to the following:

* Has surgically resected and histologically/pathologically confirmed diagnosis of Stage IIB or IIC, III, or IV cutaneous melanoma
* Has not received any prior systemic therapy for their melanoma beyond surgical resection
* No more than 13 weeks have passed between final surgical resection that rendered the participant disease-free and the first dose of pembrolizumab
* Is disease free at the time of providing documented consent for the study
* Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on anti-retroviral therapy (ART)

Exclusion Criteria:

The main exclusion criteria include but are not limited to the following:

* Has ocular or mucosal melanoma
* Has cancer that has spread to other parts of the body and cannot be removed with surgery
* Has heart failure within the past 6 months
* Has received prior cancer therapy or another cancer vaccine
* Has another known cancer that that has spread to other parts of the body or has required treatment within the past 3 years
* Has severe reaction to study medications or any of their substance used to prepare a drug
* Have not recovered from major surgery or have ongoing surgical complications

Where it's running

  • Highlands Oncology Group ( Site 1943)
    Springdale, Arkansas, United States
  • UCLA Hematology/Oncology - Westwood (Building 100) ( Site 1918)
    Los Angeles, California, United States
  • UCSF Medical Center at Mission Bay ( Site 1929)
    San Francisco, California, United States
  • Yale-New Haven Hospital-Yale Cancer Center ( Site 1933)
    New Haven, Connecticut, United States
  • Orlando Health Cancer Institute ( Site 1937)
    Orlando, Florida, United States
  • Moffitt Cancer Center, Richard M. Shulze Family Foundation Outpatient Center ( Site 1945)
    Tampa, Florida, United States
Show 44 more locations
  • Winship Cancer Institute of Emory University ( Site 1940)
    Atlanta, Georgia, United States
  • Northwest Georgia Oncology Centers, a Service of Wellstar Cobb Hospital ( Site 1950)
    Marietta, Georgia, United States
  • University of Iowa-Holden Comprehensive Cancer Center ( Site 1935)
    Iowa City, Iowa, United States
  • Johns Hopkins Hospital-Sidney Kimmel Comprehensive Cancer Center - Melanoma ( Site 1912)
    Baltimore, Maryland, United States
  • Massachusetts General Hospital ( Site 1927)
    Boston, Massachusetts, United States
  • Beth Israel Deaconess Medical Center ( Site 1957)
    Boston, Massachusetts, United States
  • Dana-Farber Cancer Institute ( Site 1956)
    Boston, Massachusetts, United States
  • University of Michigan ( Site 1915)
    Ann Arbor, Michigan, United States
  • Cancer and Hematology Centers of Western Michigan ( Site 1932)
    Grand Rapids, Michigan, United States
  • John Theurer Cancer Center at Hackensack University Medical Center ( Site 1944)
    Hackensack, New Jersey, United States
  • Atlantic Health System ( Site 1925)
    Morristown, New Jersey, United States
  • Valley Health Systems - Ridgewood Campus ( Site 1947)
    Ridgewood, New Jersey, United States
  • Perlmutter Cancer Center at NYU Langone Hospital - Long Island ( Site 1958)
    Mineola, New York, United States
  • NYU Langone Health-Perlmutter Cancer Center ( Site 1917)
    New York, New York, United States
  • Columbia University Irving Medical Center-CUIMC Herbert Irving Comprehensive Cancer Center Clinical ( Site 1908)
    New York, New York, United States
  • Memorial Sloan Kettering Cancer Center ( Site 1914)
    New York, New York, United States
  • University of North Carolina Medical Center-Lineberger Comprehensive Cancer Center ( Site 1949)
    Chapel Hill, North Carolina, United States
  • Duke Cancer Institute ( Site 1911)
    Durham, North Carolina, United States
  • Hospital of the University of Pennsylvania Perelman Center for Advanced Medicine ( Site 1905)
    Philadelphia, Pennsylvania, United States
  • UPMC Hillman Cancer Center ( Site 1909)
    Pittsburgh, Pennsylvania, United States
  • Medical University of South Carolina-Hollings Cancer Center ( Site 1934)
    Charleston, South Carolina, United States
  • Sanford Cancer Center ( Site 1951)
    Sioux Falls, South Dakota, United States
  • SCRI Oncology Partners ( Site 1910)
    Nashville, Tennessee, United States
  • Texas Oncology - Austin ( Site 1903)
    Austin, Texas, United States
  • Texas Oncology - Dallas (Sammons) ( Site 1902)
    Dallas, Texas, United States
  • University of Texas MD Anderson Cancer Center ( Site 1920)
    Houston, Texas, United States
  • Inova Schar Cancer Institute ( Site 1900)
    Fairfax, Virginia, United States
  • Fred Hutchinson Cancer Center ( Site 1901)
    Seattle, Washington, United States
  • Clinica Adventista Belgrano-Oncology ( Site 2204)
    Caba., Buenos Aires, Argentina
  • Hospital Italiano de Buenos Aires-Clinical Oncology ( Site 2202)
    Ciudad Autonoma de Buenos Aires, Buenos Aires, Argentina
  • Instituto Alexander Fleming-Alexander Fleming ( Site 2203)
    Buenos Aires, Buenos Aires F.D., Argentina
  • Centro Privado de RMI Río Cuarto S.A. II ( Site 2201)
    Río Cuarto, Córdoba Province, Argentina
  • Hospital Aleman ( Site 2200)
    Buenos Aires, Argentina
  • Sanatorio Finochietto ( Site 2205)
    Buenos Aires, Argentina
  • Westmead Hospital ( Site 1001)
    Westmead, New South Wales, Australia
  • Melanoma Institute Australia-Clinical Trials Unit ( Site 1000)
    Wollstonecraft, New South Wales, Australia
  • Princess Alexandra Hospital ( Site 1003)
    Brisbane, Queensland, Australia
  • Peter MacCallum Cancer Centre-Parkville Cancer Clinical Trials Unit (PCCTU) ( Site 1005)
    Melbourne, Victoria, Australia
  • Paula Fox Melanoma & Cancer Centre ( Site 1004)
    Melbourne, Victoria, Australia
  • One Clinical Research ( Site 1002)
    Nedlands, Western Australia, Australia
  • UZ Brussel-Medische oncologie ( Site 3405)
    Brussels, Bruxelles-Capitale, Region de, Belgium
  • Ziekenhuis Oost-Limburg, Campus St.-Jan ( Site 3402)
    Genk, Limburg, Belgium
  • UZ Gent ( Site 3403)
    Ghent, Oost-Vlaanderen, Belgium
  • UZ Leuven ( Site 3400)
    Leuven, Vlaams-Brabant, Belgium

+115 more sites. See ClinicalTrials.gov for the full list.

Study contacts

  • Principal investigator: Medical Director — Merck Sharp & Dohme LLC

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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.