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Updated: Jul 13, 2025

In Vitro Tumor Cell Rechallenge For Predictive Evaluation of Chimeric Antigen Receptor T Cell Antitumor Function
Published on: February 27, 2019
Releasing the brake: CTLA-4 loss turbocharges CAR T cells
Roland C Schelker1, Luca Gattinoni2
1Division of Functional Immune Cell Modulation, Leibniz Institute for Immunotherapy, Regensburg, Germany; Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.
Abstract:
Immune checkpoint receptor-induced T cell dysfunction is a major cause of CAR T cell treatment failure. In this issue, Agarwal et al. report that CRISPR/Cas9 deletion of CTLA4, but not PDCD1 or CTLA4 and PDCD1, enhances CD28 signaling, restoring fitness and antitumor function of CAR T cells, including those derived from patients who failed CAR T cell therapy.
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