Immatics US, Inc.
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).
This clinical trial is a multi-center, open-label, non-comparative Phase 1 a/b trial to assess the safety, tolerability, and anti-tumor activity of the combination of IMA203 and mRNA-4203 in HLA-A\*02:01 positive patients with previously treated, unresectable or metastatic cutaneous melanoma (CM) and synovial sarcoma (SS).
Inclusion Criteria: * 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 l…
Following non-myeloablative chemotherapy for lymphodepletion (LD) with fludarabine (FLU) and cyclophosphamide (CY), participants will receive a single infusion of IMA203 on Day 1 and adjunctive therapy with low dose interleukin (IL)-2 for up to 10 days, starting approximately 24 h after IMA203 infusion.
mRNA-4203 will be administered starting on Day 15 after IMA203 infusion at the earliest. mRNA-4203 will be given for 12 cycles (28 day cycle length); during Cycle 1 it will be given on Day 1 and Day 15 and in Cycles 2-12 it will be given on Day 1.
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