This is a multicenter open-label, randomized, non-comparative, parallel cohort pivotal study of treatment with envafolimab (cohort A and C) or envafolimab combined with ipilimumab (cohort B and D) in patients with locally advanced, unresectable or metastatic undifferentiated pleomorphic sarcoma (UPS)/myxofibrosarcoma (MFS) who have progressed on one or two lines of chemotherapy.
This is a multicenter open-label, randomized, non-comparative, parallel cohort pivotal study of treatment with envafolimab (cohort A and C) or envafolimab combined with ipilimumab (cohort B and D) in patients with locally advanced, unresectable or metastatic UPS/MFS who have progressed on one or two lines of chemotherapy. Patients were previously assigned at random into one of two cohorts: cohort A of 80 patients who received single agent envafolimab (300 mg every 3 weeks by subcutaneous (SC) injection) or cohort B of 80 patients who received envafolimab (300 mg every 3 weeks by SC injection) in combination with ipilimumab (1 mg/kg every 3 weeks intravenously for four doses). Following amendment #3, patients will be assigned at random into one of two cohorts: cohort C of 80 patients who will receive single agent envafolimab (600 mg every 3 weeks by subcutaneous (SC) injection) or cohort D of 80 patients who will receive envafolimab 600 mg every 3 weeks by SC injection) in combination with ipilimumab (1 mg/kg every 3 weeks intravenously for four doses). Following amendment #4, enrollment into cohort D was terminated and no further interim analyses will be conducted on this cohort.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
207
PD-L1 single domain antibody for subcutaneous injection.
CTLA-4 monoclonal antibody
Objective response rate (ORR) by RECIST 1.1 assessed by blinded independent central review
Time frame: 40 months
Duration of response (DR) assessed by blinded independent central review
Time frame: 40 months
Disease control rate (DCR) assessed by blinded independent central review
Time frame: 40 months
Progression free survival (PFS) assessed by blinded independent central review
Time frame: 40 months
Overall survival (OS)
Time frame: 40 months
Characterize envafolimab pharmacokinetics (PK) in patients receiving envafolimab as a single agent and in combination with ipilimumab
Time frame: 40 months
Characterize ipilimumab PK in patients given ipilimumab with envafolimab
Time frame: 40 months
Objective response rate (ORR) by investigator assessment
Time frame: 40 months
Progression free survival (PFS) by investigator assessment
Time frame: 40 months
Characterize the immunogenicity of envafolimab and ipilimumab
Time frame: 40 months
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