| Home > Publications database > Severe hematotoxicity after CD19 CAR-T therapy is associated with suppressive immune dysregulation and limited CAR-T expansion. |
| Journal Article | DKFZ-2023-01923 |
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2023
Assoc.
Washington, DC [u.a.]
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Please use a persistent id in citations: doi:10.1126/sciadv.adg3919
Abstract: Prolonged cytopenias after chimeric antigen receptor (CAR) T cell therapy are a significant clinical problem and the underlying pathophysiology remains poorly understood. Here, we investigated how (CAR) T cell expansion dynamics and serum proteomics affect neutrophil recovery phenotypes after CD19-directed CAR T cell therapy. Survival favored patients with 'intermittent' neutrophil recovery (e.g., recurrent neutrophil dips) compared to either 'quick' or 'aplastic' recovery. While intermittent patients displayed increased CAR T cell expansion, aplastic patients exhibited an unfavorable relationship between expansion and tumor burden. Proteomics of patient serum collected at baseline and in the first month after CAR-T therapy revealed higher markers of endothelial dysfunction, inflammatory cytokines, macrophage activation, and T cell suppression in the aplastic phenotype group. Prolonged neutrophil aplasia thus occurs in patients with systemic immune dysregulation at baseline with subsequently impaired CAR-T expansion and myeloid-related inflammatory changes. The association between neutrophil recovery and survival outcomes highlights critical interactions between host hematopoiesis and the immune state stimulated by CAR-T infusion.
Keyword(s): Humans (MeSH) ; Immunotherapy, Adoptive: adverse effects (MeSH) ; Receptors, Chimeric Antigen (MeSH) ; Adaptor Proteins, Signal Transducing (MeSH) ; Antigens, CD19 (MeSH) ; Cell Cycle (MeSH) ; Receptors, Chimeric Antigen ; Adaptor Proteins, Signal Transducing ; Antigens, CD19
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