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Cytokines enhance human Vγ9Vδ2 T-cell TCR-dependent and TCR-independent effector functions
Kirsty Field et al
Eur J Immunol; doi: 10.1002/eji.202250220
Vγ9Vδ2 T cells can recognize various molecules associated with cellular stress or transformation, providing a unique avenue for the treatment of cancers or infectious diseases. Nonetheless, Vγ9Vδ2 T-cell-based immunotherapies frequently achieve suboptimal efficacies in vivo. Enhancing the cytotoxic effector function of Vγ9Vδ2 T cells is one potential avenue through which the immunotherapeutic potential of this subset may be improved. We compared the use of four pro-inflammatory cytokines on the effector phenotype and functions of in vitro expanded Vγ9Vδ2 T cells, and demonstrated TCR-independent cytotoxicity mediated through CD26, CD16, and NKG2D, which could be further enhanced by IL-23, IL-18, and IL-15 stimulation throughout expansion. This work defines promising culture conditions that could improve Vγ9Vδ2 T-cell-based immunotherapies and furthers our understanding of how this subset might recognize and target transformed or infected cells.