Abstract
Variability or stability might have an impact on treatment success and toxicity of CD19 CAR T-cells. We conducted a prospective observational study of 12 patients treated with Tisagenlecleucel for CD19+ B-cell malignancies. Using a 31-color spectral flow cytometry panel, we analyzed differentiation stages and exhaustion markers of CAR T-cell subsets prior to CAR T-cell infusion and longitudinally during 6 months of follow-up. The majority of activation markers on CAR T-cells showed stable expression patterns over time and were not associated with response to therapy or toxicity. Unsupervised cluster analysis revealed an immune signature of CAR T-cell products associated with the development of immune cell-associated neurotoxicity syndrome. Warranting validation in an independent patient cohort, in-depth phenotyping of CAR T-cell products as well as longitudinal monitoring post cell transfer might become a valuable tool to increase efficacy and safety of CAR T-cell therapy.
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Citations
35
References
Details
Published
Jan 22, 2024
Vol/Issue
15
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Funding
Deutsche Forschungsgemeinschaft
Bundesministerium für Bildung und Forschung
Cite This Article
Ivan Odak, Lâle M. Bayir, Lennart Riemann, et al. (2024). Brief research report: in-depth immunophenotyping reveals stability of CD19 CAR T-cells over time. Frontiers in Immunology, 15. https://doi.org/10.3389/fimmu.2024.1298598
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