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- W2001297737 abstract "Background aims Cytotoxic T lymphocytes modified with chimeric antigen receptors (CARs) for adoptive immunotherapy of hematologic malignancies are effective in pre-clinical models, and this efficacy has translated to success in several clinical trials. Many early trials were disappointing in large part because of the lack of proliferation and subsequent persistence of transferred cells. Recent investigations have pointed to the importance of delivering highly proliferative cells, whether of naive or early memory phenotypes. Methods We investigated the influence of two common cell culturing methods used in early trials and their relationship to T-cell phenotype and pre-clinical efficacy. Results We observed that stimulation with soluble anti-CD3 antibody OKT-3 and high-dose interleukin-2 produces more effector memory-type T cells with shorter average telomeres when compared with cells generated with the use of CD3/CD28 beads. When used in xenograft models of leukemia, bead-stimulated cells proliferated earlier and to a higher degree than those generated with the use of OKT-3/IL2 and resulted in better disease control despite no difference in distribution or migration throughout the mouse. Inclusion of the known successful clinical 4-1BB endodomain in the CAR could not rescue the function of OKT-3/IL-2–cultured cells. T cells isolated from animals that survived long-term (>120 days) retained a central memory–like phenotype and demonstrated a memory response to a large re-challenge of CD19-positive leukemia. Conclusions In summary, we confirm that cells with a younger phenotype or higher proliferative capacity perform better in pre-clinical models and that cell culturing influences cell phenotype seemingly independent of the 4-1BB endodomain in the CAR structure." @default.
- W2001297737 created "2016-06-24" @default.
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- W2001297737 date "2014-05-01" @default.
- W2001297737 modified "2023-10-10" @default.
- W2001297737 title "Relation of clinical culture method to T-cell memory status and efficacy in xenograft models of adoptive immunotherapy" @default.
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- W2001297737 doi "https://doi.org/10.1016/j.jcyt.2013.10.013" @default.
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