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Recruiting Phase 1

ACTengine® IMA203 Combined With mRNA-4203

About this study

This purpose of this clinical trial is to evaluate the safety, tolerability and anti-tumor activity of IMA203 in combination with different doses of mRNA-4203. The trial includes participants with previously treated unresectable or metastatic cutaneous melanoma (CM) or synovial sarcoma (SS).

Condition
Cutaneous Melanoma, Synovial Sarcoma
Tested
IMA203, mRNA-4203
Sponsor
Immatics US, Inc.

Who can join

Age
18 years and older
Sex
All sexes
Healthy volunteers
Not accepted

Inclusion 12

  • Minimum age: 18 years
  • Study condition: Cutaneous Melanoma, Synovial Sarcoma
  • Pathologically confirmed and documented cutaneous melanoma (CM) or synovial sarcoma (SS) 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
  • Measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST 1.1)
  • Life expectancy more than 5 months
  • CM participants who must have disease progression (resistance, toxicity) on or after at least one PD-1 inhibitor
  • SS participants must have received (or declined) at least one line of treatment (including SoC) and are still in need of further systemic therapy.
  • Female participants of childbearing potential must use adequate contraception prior to trial entry until 12 months after the infusion of IMA203 and 15 days after the last mRNA 4203 dose administration
  • Other protocol defined inclusion criteria could apply

Exclusion 15

  • History of other malignancies (except for adequately treated basal or squamous cell carcinoma or carcinoma in situ) within the last 3 years
  • Pregnant or breastfeeding
  • Serious autoimmune disease
  • 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 hypersensitivity to cyclophosphamide, fludarabine, or IL-2
  • History of hypersensitivity to mRNA-based medicines
  • Positive for HIV infection or with active hepatitis B virus (HBV) or active hepatitis C virus (HCV) infection
  • Any condition contraindicating leukapheresis
  • Participants with lactate dehydrogenase (LDH) greater than threshold allowed per protocol
  • Participants with active brain metastases prior to lymphodepletion
  • Concurrent treatment in another clinical trial or a device trial that could interfere with the IMA203 treatment
  • Participants with renal impairment AND reduced bone marrow reserve per protocol
  • Other protocol defined exclusion criteria could apply

Where

4 sites, 4 recruiting

Dana Farber Cancer Institute

Boston, Massachusetts, United States

Recruiting

MD Anderson Cancer Center

Houston, Texas, United States

Recruiting

Memorial Sloan Kettering Cancer Center

New York, New York, United States

Recruiting

University of California San Francisco

San Francisco, California, United States

Recruiting

Contact

Potential match only. Final eligibility is determined by the study team.