NKTR-255 in Combination With CAR-T Cell Therapy for the Treatment of Relapsed or Refractory Large B-cell Lymphoma

OUTLINE: Patients receive standard of care lymphodepletion therapy consisting of cyclophosphamide and fludarabine on days -5 to -3 followed by liso-cel CAR-T cell infusion on day 0. Patients then receive NKTR-255 intravenously (IV) over 30 minutes every 3 weeks starting on day 10 or 14 in the absence of disease progression or unacceptable toxicity. Patients undergo chest x-ray and echocardiography (ECHO) or multigated acquisition scan (MUGA) during screening. Patients undergo bone marrow biopsy and aspiration, lumbar puncture (LP) for cerebrospinal fluid (CSF) sample collection during screening, on the study and during follow-up as clinically indicated. Patients also undergo positron emission tomography (PET)/computed tomography (CT) throughout the trial. Additionally, patients undergo blood sample collection and may optionally undergo tissue biopsy throughout the trial. After completion of study treatment, patients are followed up every 30 days then every 3 months up to 12 months after the CAR-T cell infusion.