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Chimeric Antigen Receptor Therapy in Acute Lymphoblastic Leukemia Clinical Practice

Abstract

Over half of patients diagnosed with B-cell acute lymphoblastic leukemia (ALL) develop relapsed or refractory disease. Traditional chemotherapy salvage is inadequate, and new therapies are needed. Chimeric antigen receptor (CAR) T cell therapy is a novel, immunologic approach where T cells are genetically engineered to express a CAR conferring specificity against a target cell surface antigen, most commonly the pan-B-cell marker CD19. After infusion, CAR T cells expand and persist, allowing ongoing tumor surveillance. Several anti-CD19 CAR T cell constructs have induced high response rates in heavily pre-treated populations, although durability of response varied. Severe toxicity (cytokine release syndrome and neurotoxicity) is the primary constraint to broad implementation of CAR T cell therapy. Here, we review the experience of CAR T cell therapy for ALL and ongoing efforts to modify existing technology to improve efficacy and decrease toxicity. As an anti-CD19 CAR T cell construct may be FDA approved soon, we focus on issues relevant to practicing clinicians.

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Correspondence to Marlise R. Luskin.

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This article is part of the Topical Collection on Acute Lymphocytic Leukemias

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Luskin, M.R., DeAngelo, D.J. Chimeric Antigen Receptor Therapy in Acute Lymphoblastic Leukemia Clinical Practice. Curr Hematol Malig Rep 12, 370–379 (2017). https://doi.org/10.1007/s11899-017-0394-x

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Keywords

  • Acute lymphoblastic leukemia
  • Immunotherapy
  • Chimeric antigen receptor T cells
  • CART
  • Adoptive cell therapy