This phase II trial studies how well fluorine F 18 Ara-G positron emission tomography (PET)/magnetic resonance (MR) imaging works in measuring clinical response to atezolizumab or patients with cancer receiving standard of care Anti-PD-1/L1. Diagnostic procedures, such as fluorine F 18 Ara-G PET/MR imaging, may help measure a patient's response to standard of care atezolizumab or Anti-PD-1/L1 treatment.
PRIMARY OBJECTIVES:
I. To assess the change in fluorine F 18 Ara-G ([18F]F-AraG) uptake in primary and/or metastatic tumor(s) on whole-body [18F]F-AraG PET/MR imaging associated with neoadjuvant atezolizumab and standard of care (SOC) anti-PD-1 or anti-PD-L1 treatment.
SECONDARY OBJECTIVES:
I. To correlate change in [18F]F-AraG uptake within the primary tumor with clinical and pathologic response in patients treated with neoadjuvant atezolizumab. (Cohort 1) II. To assess [18F]F-AraG uptake in lymphoid organs before and after anti-PD-1 or anti-PD-L1 treatment. (Cohort 1 and 2)
OUTLINE: Patients are assigned to 1 or 2 cohorts.
COHORT I (NEOADJUVANT COHORT): Patients receive fluorine F 18 Ara-G intravenously (IV) and undergo PET/MR imaging over 1.5-3 hours within 7 days of starting standard of care atezolizumab and within 7 days before surgery.
COHORT II (SOC COHORT): Patients receive fluorine F 18 Ara-G IV and undergo PET/MR imaging over 1.5-3 hours within 7 days of initiating course 1 of anti-PD-1 or anti-PD-L1 therapy and between day 15 of course 1 and day 7 of course 2 of anti-PD-1 or anti-PD-L1 treatment.
After completion of study, patients are followed up at days 2 and 8.
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