Safety and Efficacy of Sequential CD19 and CD22 Targeted CAR-T Therapy for Relapsed/Refractory B Cell Lymphoma

CAR-T cells were manufactured from peripheral blood mononuclear cells collected by leukapheresis and frozen for multiple uses. Before each CAR T-cell infusion (day 0), patients received lymphodepleting chemotherapy composing of Fludarabine (30 mg/m2/day) and Cyclophosphamide (300 mg/m2/day) on days -5 to -3. No bridging chemotherapy was given between enrollment and infusion. In sequential CAR-T clinical trials, CAR-T cells will be given.（anti-CD19 CAR-T first, then anti-CD22 CAR-T).