Recruiting
Phase 3

IMA203 vs. Investigator's Choice

Sponsor:

Immatics US, Inc.

Code:

NCT06743126

Conditions

Melanoma, Cutaneous Malignant

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

IMA203

nivolumab plus relatlimab

lifileucel

nivolumab

pembrolizumab

Study Details

Brief summary:

This clinical trial is a prospective, multicenter, open-label, randomized, actively controlled, parallel-group Phase 3 clinical trial to evaluate the efficacy, safety and tolerability of treatment with IMA203 administered at the recommended phase 2 dose versus investigator's choice of treatment in patients with previously treated, unresectable or metastatic cutaneous melanoma.

For patients interested in additional information on how to participate, please follow this link: https://mytomorrows.com/trials/suprame/en-us/

Conditions

Melanoma, Cutaneous Malignant

Study ID

NCT06743126

Start date

Jan 14, 2025

Status verified date

Jun, 2026

Completion date

Oct, 2031

Anticipated

Primary completion date

Jan, 2028

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Pathologically confirmed and documented cutaneous melanoma- CM patients (including acral melanoma and melanoma of unknown primary) with unresectable or metastatic disease
  • HLA-A\*02:01 positive
  • Adequate selected organ function per protocol
  • Eastern Cooperative Oncology Group (ECOG) performance status 0-1
  • Disease progression (resistance, toxicity) on or after at least one PD-1 inhibitor, applied either as monotherapy or in combination with other therapies as treatment for unresectable or metastatic cutaneous melanoma
  • Patients with BRAF mutation should have been treated with one prior line of BRAF-directed therapy (with or without a MEK inhibitor) prior to initial eligibility assessment, unless deemed not clinically indicated at Investigator's discretion due to concurrent medical condition, prior toxicity, or if declined by the patient
  • Life expectancy more than 6 months
  • Measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST 1.1)
  • Female patient of childbearing potential must use adequate contraception from randomization until 12 months after the infusion of IMA203 or in line with the instructions provided for investigator's choice treatment (in the control arm)
  • Male patient must agree to use effective contraception or be abstinent while on study and for 6 months after the infusion of IMA203 or in line with the instructions provided for investigator's choice treatment (in the control arm)
  • The patient must have recovered from any side effects of prior therapy to Grade 1 or lower prior to randomization and prior to trial treatment start.

Exclusion Criteria:

  • Primary mucosal or uveal melanoma
  • History of other malignancies (except for adequately treated basal or squamous cell carcinoma or carcinoma in situ) within the last 3 years
  • Serious autoimmune disease Note: At the discretion of the investigator, these patients may be included if their disease is well controlled without the use of immunosuppressive agents.
  • History of cardiac conditions as per protocol
  • Prior allogenic stem cell transplantation or solid organ transplantation
  • Concurrent severe and/or uncontrolled medical disease that could compromise participation in the study
  • History of or current immunodeficiency disease or prior treatment compromising immune function at the discretion of the treating physician
  • History of hypersensitivity to CY, FLU, or IL-2 or presence of any contraindications and other limitations for planned treatment with investigator's choice as laid down in the current versions of the respective PIs / SmPCs
  • Known hypersensitivity to any of the rescue medications
  • History of or current immunodeficiency disease or prior treatment compromising immune function at the discretion of the investigator
  • Positive for HIV infection or with active hepatitis B virus (HBV) or active hepatitis C virus (HCV) infection.
  • Any condition contraindicating leukapheresis
  • Pregnant or breastfeeding
  • Any other condition that would, in the investigator's or sponsor's judgment, contraindicate the patient's participation in the clinical trial because of safety concerns or compliance with clinical trial procedures (e.g., psychiatric disorders or substance dependence, neurological impairment)
  • Patient has received systemic corticosteroids within 2 weeks prior to leukapheresis,
  • Patient has received surgery or other anti-cancer therapies, any agent that is likely to suppress bone marrow function, or investigational medicinal products within 7 days prior to leukapheresis.
  • Patients with any active infection or ongoing reactivation of infection
  • Patients who underwent non-myeloablative lymphodepletion prior to cell therapy within the last 6 months
  • Prior treatment with IMA203
  • Patients with ascites, pleural or pericardial effusion which requires repeated (2 within 4 weeks) or continuous paracentesis, thoracentesis or pericardiocentesis within last 2 months
  • Patients with LDH greater than 2.0-fold ULN
  • Concurrent treatment in another clinical trial or a device study that could interfere with the IMA203 treatment or planned investigator's choice treatment
  • Patients with active brain metastases or leptomeningeal metastases
  • Patient has received any investigational therapies, inactivated vaccines, chronic use of systemic corticosteroids or IV antibiotics within 1 week prior to randomization, or live vaccines within 4 weeks prior to randomization
  • Patient has received any anti-cancer therapy (prior anti-cancer treatment or bridging therapy) or radiotherapy within 1 week prior to start of trial treatment
  • Other protocol defined inclusion/exclusion criteria could apply

Study Design

Enrollment

360 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Experimental arm

Non-myeloablative chemotherapy for lymphodepletion (LD) over 4 days using fludarabine (FLU) and cyclophosphamide (CY), one-time administration of IMA203, and adjunctive therapy with low dose interleukin (IL)-2 for up to 10 days, starting approximately 24 h after IMA203 infusion, optional bridging therapy

active comparator: Control arm- investigator's choice

Investigator's choice of treatment approved by the respective Competent Authority (nivolumab plus relatlimab \[Opdualag®\], lifileucel, nivolumab, pembrolizumab, ipilimumab, or chemotherapy \[e.g., dacarbazine, temozolomide, paclitaxel, alb-bound paclitaxel, or paclitaxel plus carboplatin\]) as determined by the site investigator in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC), optional bridging therapy.

Interventions

IMA203

one-time administration of IMA203, and adjunctive therapy with low dose interleukin (IL)-2 for up to 10 days, starting approximately 24 h after IMA203 infusion, optional bridging therapy

nivolumab plus relatlimab

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

lifileucel

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

nivolumab

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

pembrolizumab

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

ipilimumab

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

Dacarbazine

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

temozolomide

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

paclitaxel

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

paclitaxel plus carboplatin

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

Albumin-Bound Paclitaxel

in accordance with current respective prescribing information (PI) and/or summary of product characteristics (SmPC)

Primary outcome measure

  • Progression-free survival assessed by BICR [ Time Frame: up to 5 years post first treatment of last patient ]

Central Contacts and Locations

Central contacts

Locations

Mayo Clinic

Recruiting

Phoenix, Arizona, United States, 85054

Contacts

Seetharam Mahesh, MD

Seetharam.Mahesh@mayo.edu

Honor Health Research Institute

Recruiting

Scottsdale, Arizona, United States, 85258

Contacts

City of Hope National Medical Center

Recruiting

Duarte, California, United States, 91010

Contacts

Yan Xing, MD

yxing@coh.org

UC San Diego Moores Cancer Center

Recruiting

La Jolla, California, United States, 92093

Contacts

Gregory Daniels, MD

gdaniels@health.ucsd.edu

UCLA Hematology/Oncology

Recruiting

Los Angeles, California, United States, 90024

Contacts

Bartosz Chmielowski, MD, PhD

bchmielowski@mednet.ucla.edu

UCSF Helen Diller Family Comprehensive Cancer Center

Recruiting

San Francisco, California, United States, 94143

Contacts

Adil Daud, MD

adil.daud@ucsf.edu

Stanford Cancer Center

Recruiting

Stanford, California, United States, 94305

Contacts

Alison Betof Warner, MD, PhD

allison.betof@stanford.edu

University of Colorado, Anschutz Medical Campus

Recruiting

Aurora, Colorado, United States, 80045

Contacts

Sapna Patel, MD

720-848-0000

Yale Cancer Center

Recruiting

New Haven, Connecticut, United States, 06510

Mayo Clinic Florida

Recruiting

Jacksonville, Florida, United States, 32224

Contacts

Ruqin Chen, MD

chen.ruqin@mayo.edu

University of Miami - Sylvester Comprehensive Cancer Cente

Recruiting

Miami, Florida, United States, 33136

Contacts

Leonel Hernandez-Aya, MD

l.hernandezaya@med.miami.edu

Moffitt Cancer Center

Recruiting

Tampa, Florida, United States, 33612

University of Chicago Medical Center

Recruiting

Chicago, Illinois, United States, 60637

Contacts

University of MD Greenebaum Comprehensive Cancer Center

Recruiting

Baltimore, Maryland, United States, 21201

Contacts

Petra Hausner, MD, PhD

410-328-2567phausner@umm.edu

Massachusetts General Hospital

Recruiting

Boston, Massachusetts, United States, 02114

Beth Israel Deaconess Medical Center

Recruiting

Boston, Massachusetts, United States, 02215

Contacts

David McDermott, MD

dmcdermo@bidmc.harvard.edu

University of Michigan

Recruiting

Ann Arbor, Michigan, United States, 48109

Contacts

Mayo Clinic

Recruiting

Rochester, Minnesota, United States, 55905

Contacts

Arkadiusz Dudek, MD, PhD

dudek.arkadiusz@mayo.edu

University of Nebraska Medical Center

Recruiting

Omaha, Nebraska, United States, 68198

Contacts

Atlantic Health System/Morristown Medical Center

Recruiting

Morristown, New Jersey, United States, 07960

Contacts

Laura and Isaac Perlmutter Cancer Center at NYU Langone Health

Recruiting

New York, New York, United States, 10016

Contacts

Memorial Sloan Kettering Cancer Center

Recruiting

New York, New York, United States, 10065

Contacts

James Smithy, MD

smithyj@mskcc.org

University of Rochester

Recruiting

Rochester, New York, United States, 14642

Contacts

UNC Hospitals, The University of North Carolina at Chapel Hill

Recruiting

Chapel Hill, North Carolina, United States, 27599

Contacts

Cleveland Clinic, Taussig Cancer Institute

Recruiting

Cleveland, Ohio, United States, 44195

Contacts

James Isaac

isaacsj3@ccf.org

Ohio State University

Recruiting

Columbus, Ohio, United States, 43210

Providence Cancer Institute Franz Clinic

Recruiting

Portland, Oregon, United States, 97213

Contacts

Lehigh Valley Topper Cancer Institute

Recruiting

Allentown, Pennsylvania, United States, 18103

Contacts

University of Pennsylvania, Abramson Cancer Center

Recruiting

Philadelphia, Pennsylvania, United States, 19104

Contacts

Tara Mitchell, MD

215-662-7908

Thomas Jeffersion University, Sidney Kimmel Cancer Center

Recruiting

Philadelphia, Pennsylvania, United States, 19107

Contacts

Fox Chase Cancer Center

Recruiting

Philadelphia, Pennsylvania, United States, 19111

Contacts

Anthony J Olszanski, MD, RPh

215-728-5673Anthony.Olszanski@FCCC.edu

UPMC Hillman Cancer Center

Recruiting

Pittsburgh, Pennsylvania, United States, 15232

Contacts

Diwakar Davar, M.D.

412-623-7368davard@upmc.edu

Principal Investigator:

Jason J Luke, M.D.

Avera Cancer Institute

Recruiting

Sioux Falls, South Dakota, United States, 57105

Contacts

SCRI Oncology Partners

Recruiting

Nashville, Tennessee, United States, 37203

Contacts

Meredith A McKean, MD, MPH

615-524-4461

Baylor University

Recruiting

Dallas, Texas, United States, 75246

University of Texas Southwestern Medical Center

Recruiting

Dallas, Texas, United States, 75390

Contacts

The University of Texas MD Anderson Cancer Center

Recruiting

Houston, Texas, United States, 77030

Contacts

Huntsman Cancer Institute, University of Utah

Recruiting

Salt Lake City, Utah, United States, 84112

Contacts

Siwen Hu-Lieskovan, MD, PhD

Siwen.Hu-Leiskovan@hci.utah.edu

Virginia Commonwealth University

Recruiting

Richmond, Virginia, United States, 23219

Contacts

Andrew Poklepovic, MD

andrew.poklepovic@vcuhealth.org

Fred Hutchinson Cancer Center

Recruiting

Seattle, Washington, United States, 98109

Contacts

Sylvia Lee, MD

leesm@uw.edu

University of Wisconsin

Recruiting

Madison, Wisconsin, United States, 53792

Cross Cancer Institute, Alberta

Recruiting

Edmonton, Alberta, Canada, T6G 1Z2

BC Cancer - Vancouver

Recruiting

Vancouver, British Columbia, Canada, V5Z 4E6

Contacts

University Health Network, Princess Margaret Cancer Centre

Recruiting

Toronto, Ontario, Canada, M5G 2M9

Contacts

Marcus Butler, MD

Marcus.Butler@uhn.ca

Centre hospitalier de l'Université de Montréal (CHUM)

Recruiting

Montreal, Quebec, Canada, H2X 0A9

More Information

Sponsor

Immatics US, Inc.

Last update posted

Aug 18, 2026

Last verified

Jun, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-08. This information was provided to ClinicalTrials.gov by Immatics US, Inc. on 2026-08-18.