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Updated: Jan 4, 2026

Manufacturing Chimeric Antigen Receptor CAR T Cells for Adoptive Immunotherapy
Published on: December 17, 2019
A cellular antidote to specifically deplete anti-CD19 chimeric antigen receptor-positive cells
Marco Ruella1,2,3, David M Barrett4, Olga Shestova1
1Center for Cellular Immunotherapies and.
Abstract:
Unintentional transduction of B-cell acute lymphoblastic leukemia blasts during CART19 manufacturing can lead to CAR19+ leukemic cells (CARB19) that are resistant to CART19 killing. We developed an anti-CAR19 idiotype chimeric antigen receptor (αCAR19) to specifically recognize CAR19+ cells. αCAR19 CAR T cells efficiently lysed CARB19 cells in vitro and in a primary leukemia-derived xenograft model. We further showed that αCAR19-CART cells could be used as an "antidote" to deplete CART19 cells to reduce long-term side effects, such as B-cell aplasia.
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