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- W4210859154 abstract "T cell receptor (TCR)–based therapy has the potential to induce durable clinical responses in patients with cancer by targeting intracellular tumor antigens with high sensitivity and by promoting T cell survival. However, the need for TCRs specific for shared oncogenic antigens and the need for manufacturing protocols able to redirect T cell specificity while preserving T cell fitness remain limiting factors. By longitudinal monitoring of T cell functionality and dynamics in 15 healthy donors, we isolated 19 TCRs specific for Wilms’ tumor antigen 1 (WT1), which is overexpressed by several tumor types. TCRs recognized several peptides restricted by common human leukocyte antigen (HLA) alleles and displayed a wide range of functional avidities. We selected five high-avidity HLA-A*02:01–restricted TCRs, three that were specific to the less explored immunodominant WT1 37–45 and two that were specific to the noncanonical WT1 −78–64 epitopes, both naturally processed by primary acute myeloid leukemia (AML) blasts. With CRISPR-Cas9 genome editing tools, we combined TCR-targeted integration into the TCR α constant ( TRAC ) locus with TCR β constant ( TRBC ) knockout, thus avoiding TCRαβ mispairing and maximizing TCR expression and function. The engineered lymphocytes were enriched in memory stem T cells. A unique WT1 37–45 -specific TCR showed antigen-specific responses and efficiently killed AML blasts, acute lymphoblastic leukemia blasts, and glioblastoma cells in vitro and in vivo in the absence of off-tumor toxicity. T cells engineered to express this receptor are being advanced into clinical development for AML immunotherapy and represent a candidate therapy for other WT1-expressing tumors." @default.
- W4210859154 created "2022-02-09" @default.
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- W4210859154 date "2022-02-09" @default.
- W4210859154 modified "2023-09-30" @default.
- W4210859154 title "CRISPR-based gene disruption and integration of high-avidity, WT1-specific T cell receptors improve antitumor T cell function" @default.
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