T-cell responses against CD19-targeted CAR T cells varnimcabtagene autoleucel (ARI-0001): implications for immune response and therapy outcomes.
Patients with B-cell malignancies receiving CD19-targeted chimeric antigen receptor (CAR) T-cell therapy may experience treatment failure due to various mechanisms. One significant factor is the host's immune response against the CAR-T product, mainly triggered by the immunogenicity of non-huma...
| Autores: | , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Fundació Sant Joan de Déu |
| Repositorio: | r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu |
| OAI Identifier: | oai:fsjd.fundanetsuite.com:p29161 |
| Acceso en línea: | https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=29161 |
| Access Level: | acceso abierto |
| Palabra clave: | T cell antibody chimeric antigen receptor - CAR relapse |
| Sumario: | Patients with B-cell malignancies receiving CD19-targeted chimeric antigen receptor (CAR) T-cell therapy may experience treatment failure due to various mechanisms. One significant factor is the host's immune response against the CAR-T product, mainly triggered by the immunogenicity of non-human sequences present in the CAR construct. In the CART19-BE-01 clinical trial (NCT03144583, ClinicalTrials.gov), patients with relapsed/refractory B-cell malignancies received treatment with varnimcabtagene autoleucel (ARI-0001 cells), a CD19-targeted autologous CAR-T product. During follow-up, both humoral and cellular immune responses were assessed against the extracellular domain of ARI-0001 cells, which was derived from the murine monoclonal antibody A3B1. Here, we report the case of a patient with B-cell acute lymphoblastic leukemia who required two infusions of ARI-0001 cells. Between the first and second CAR-T19 infusions, human antimurine antibodies were detected, which in vitro diminished the cytotoxicity of ARI-0001 cells against the CD19-positive NALM6 cell line. Furthermore, CD4(+) specific T cells against the CAR19 construct were isolated from the patient's peripheral blood mononuclear cells, showing recognition of the murine single-chain variable fragment peptides presented by human leukocyte antigen class II. This case underscores the need to monitor immune responses in patients before considering subsequent CAR-T infusions to preserve treatment efficacy.Trial registration number NCT03144583. |
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