Abstract
Given the shortage of fludarabine, alternative preparative lymphodepleting regimens for CAR-T-cell therapy need to be identified. We present a case of relapsed/refractory B-cell acute lymphoblastic leukemia requiring multiple lines of salvage therapy with persistent extensive disease, who underwent lymphodepletion with clofarabine and cyclophosphamide before tisagenlecleucel CD19+ CAR-T-cell infusion with eventual remission. We offer evidence of clofarabine's activity against B-cell acute lymphoblastic leukemia in combination with tisagenlecleucel therapy. In this patient, clofarabine did not decrease CAR-T-cell effectiveness, supported by presence of cytokine release syndrome and ultimate minimal residual disease negativity both on flow cytometry and next-generation sequencing.
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