A Major Role for CD4 T cells in Driving Cytokine Release Syndrome During CAR T cell Therapy
Overview
General Medicine
Authors
Affiliations
Anti-CD19 chimeric antigen receptor (CAR) T cell therapy represents a breakthrough for the treatment of B cell malignancies. Yet, it can lead to severe adverse events, including cytokine release syndrome (CRS), which may require urgent clinical management. Whether interpatient variability in CAR T cell subsets contributes to CRS is unclear. Here, we show that CD4 CAR T cells are the main drivers of CRS. Using an immunocompetent model of anti-CD19 CAR T cell therapy, we report that CD4, but not CD8, CAR T cells elicit physiological CRS-like manifestations associated with the release of inflammatory cytokines. In CAR T cell-treated patients, CRS occurrence and severity are significantly associated with high absolute values of CD4 CAR T cells in the blood. CRS in mice occurs independently of CAR T cell-derived interferon γ (IFN-γ) but requires elevated tumor burden. Thus, adjusting the CD4:CD8 CAR T cell ratio to patient tumor load may help mitigate CAR T cell-associated toxicities.
Zhang M, Zhang X, Wang J, Lu W, Xiao X, Lyu H Front Immunol. 2025; 15:1491341.
PMID: 39896798 PMC: 11782272. DOI: 10.3389/fimmu.2024.1491341.
Balestra T, Niswander L, Bagashev A, Loftus J, Ross S, Chen R Leukemia. 2024; 39(3):555-567.
PMID: 39681640 PMC: 11879877. DOI: 10.1038/s41375-024-02493-3.
Ellerman D BioDrugs. 2024; 39(1):75-102.
PMID: 39673023 DOI: 10.1007/s40259-024-00691-0.
Alidadi M, Barzgar H, Zaman M, Paevskaya O, Metanat Y, Khodabandehloo E Front Cell Dev Biol. 2024; 12:1491282.
PMID: 39624236 PMC: 11609223. DOI: 10.3389/fcell.2024.1491282.
Guo J, Wu Q, Li H, Liang C, Dai J, Zhang S Front Immunol. 2024; 15:1435934.
PMID: 39606226 PMC: 11598525. DOI: 10.3389/fimmu.2024.1435934.