ArticleFrontiers in cell and developmental biology2026
Dual-antigen recognition iPSC-derived CAR-T cells for B-cell malignancies: establishment of a COVID-19 vaccine synergy strategy.
Article in Frontiers in cell and developmental biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: CD19-directed chimeric antigen receptor (CD19-CAR) T-cell therapy has markedly improved outcomes in relapsed and refractory B-cell malignancies, but its efficacy remains limited by insufficient Methods: SARS-CoV-2 spike protein-specific rejTs (COVID19-rejTs) were established from iPSCs derived from spike protein-specific CTLs. A CD19-CAR was introduced into these iPSCs to generate dual-antigen recognition CARrejTs targeting CD19 and COVID-19 spike protein (1919-CARrejTs). Subsequently, 1919-CARrejTs were assessed for cytotoxicity, proliferative capacity, and exhaustion phenotype using Results: 1919-CARrejTs uniformly expressed both CD19-CAR and spike protein-specific TCRs, retained antigen-specific cytotoxicity, and exhibited a rejuvenated phenotype with higher expression of granzyme B and perforin and lower expression of exhaustion markers compared with conventional CD19-CAR-T cells. Dual-antigen recognition enhanced cytotoxicity under matched antigen presentation, and 1919-CARrejTs maintained durable tumor control in sequential rechallenge assays. CFSE dilution analysis revealed that TCR-mediated stimulation by spike protein-specific peptide provided strong proliferative capacity of 1919-CARrejTs in an HLA-dependent manner. Conclusion: The combination of iPSC-mediated rejuvenation and dual-antigen recognition via CAR and native TCR confers superior cytotoxicity, persistence, and proliferative potential compared to conventional CD19-CAR-T cells. These findings provide a proof-of-concept for a vaccine-synergy strategy in which
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