Testing the Addition of the Immune Therapy Drugs, Tocilizumab and Atezolizumab, to Radiation Therapy for Recurrent Glioblastoma

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PRIMARY OBJECTIVES: I. To determine the maximum-tolerated dose (MTD) among three sequential dose levels: single-agent tocilizumab 4 mg/kg, single-agent tocilizumab 8 mg/kg, and tocilizumab 8 mg/kg + atezolizumab 1680 mg (each administered with fractionated stereotactic radiation therapy [FSRT]), to ...

PRIMARY OBJECTIVES: I. To determine the maximum-tolerated dose (MTD) among three sequential dose levels: single-agent tocilizumab 4 mg/kg, single-agent tocilizumab 8 mg/kg, and tocilizumab 8 mg/kg + atezolizumab 1680 mg (each administered with fractionated stereotactic radiation therapy [FSRT]), to be used for subsequent phase II testing. (Safety Run-In) II. To determine the efficacy of the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT in recurrent glioblastoma (GBM), as measured by the objective radiographic response rate (ORR). (Phase II [Non-Surgical Cohort]) SECONDARY OBJECTIVES: I. To estimate the progression-free survival (PFS) in patients with recurrent GBM treated with the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT. (Phase II Non-Surgical Cohort). II. To estimate the overall survival (OS) in patients with recurrent GBM treated with the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT. (Phase II Non-Surgical Cohort) III. To estimate the progression-free survival (PFS) in patients with recurrent GBM treated with the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT. (Phase II Surgical Cohort) IV. To estimate the overall survival (OS) in patients with recurrent GBM treated with the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT. (Phase II Surgical Cohort) V. To determine the rate and severity of adverse events (AEs) of the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT in recurrent glioblastoma according to Common Terminology Criteria for Adverse Events (CTCAE) version (v) 5.0. (Separately in the Nonsurgical and Surgical Cohorts) EXPLORATORY OBJECTIVES: I. To determine the effect of the combination of atezolizumab (anti-PD-L1) and FSRT, with versus (vs.) without tocilizumab (anti-IL6R), on the GBM immune microenvironment (phase II surgical cohort). II. To evaluate the pharmacodynamic impact of the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT on peripheral blood immune cell populations (phase II surgical cohort). III. To detect tumor and/or blood biomarkers associated with the outcomes of OS, PFS, and/or ORR in patients with recurrent GBM treated with the combination of tocilizumab (anti-IL6R), atezolizumab (anti-PD-L1), and FSRT (phase II non-surgical cohort). OUTLINE: SAFETY RUN-IN: Patients receive systemic treatment with either tocilizumab intravenously (IV) over 60 minutes with or without atezolizumab IV over 30-60 minutes on day 1. Within 3-7 days, patients undergo FSRT for 3 fractions over 3-5 days. Starting 4 weeks from the first dose of systemic treatment, patients resume treatment with tocilizumab with or without atezolizumab. Treatment repeats every 4 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. GROUP I (NON-SURGICAL COHORT): Patients receive systemic treatment with tocilizumab IV over 60 minutes with or without atezolizumab IV over 30-60 minutes (dependent upon the results of the Safety Run-In) on day 1. Within 3-7 days, patients undergo FSRT for 3 fractions over 3-5 days in the absence of disease progression or unacceptable toxicity. Starting 4 weeks from the first dose of systemic treatment, patients resume treatment with tocilizumab with or without atezolizumab. Treatment repeats every 4 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. GROUP II (SURGICAL COHORT): Patients are randomized to 1 of 2 arms. ARM I: Patients receive systemic treatment with tocilizumab IV over 60 minutes with or without atezolizumab IV over 30-60 minutes (dependent upon the results of the Safety Run-In) on day 1. Within 3-7 days, patients undergo FSRT for 3 fractions over 3-5 days. Within 7-14 days after FSRT, patients undergo surgery. Within 21-24 days from the first dose of systemic treatment, patients resume treatment with tocilizumab with or without atezolizumab. Treatment repeats every 4 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. ARM II: Patients receive systemic treatment with atezolizumab IV over 30-60 minutes on day 1. Within 3-7 days, patients undergo FSRT for 3-5 fractions over 3-5 days. Within 7-14 days after FSRT, patients undergo surgery. Within 21-24 days from the first dose of systemic treatment, patients resume treatment with tocilizumab IV over 60 minutes with or without atezolizumab. Treatment repeats every 4 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days, 3, 6, 9, 12, 18, and 24 months.

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