 Axicabtagene ciloleucel (KTE-C19, ZUMA-3, YESCARTA) was an investigational therapy (for the treatment of adult patients with relapsed or refractory acute lymphoblastic leukemia (ALL)) in which a patient's T cells were genetically modified to express a chimeric antigen receptor designed to target the antigen CD19, a protein expressed on the cell surface of B-cell lymphomas and leukemias.It garnered a US FDA Breakthrough Therapy Designation (Dec 2015) for the treatment of patients with refractory diffuse large B cell lymphoma (DLBCL), primary mediastinal B cell lymphoma (PMBCL), and transformed follicular lymphoma (TFL).It was approved for use in the United States under the brand name YESCARTA in October 2017.