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- W2002378629 abstract "Abstract In humans, the majority of peripheral blood γδ T cells expresses Vγ9Vδ2 T-cell receptors (TCR) and recognize nonpeptidic phosphorylated antigens. In contrast, most tissue-derived γδ T cells, which are located mainly in spleen and epithelia, preferentially use Vδ1 or Vδ3 chains paired with diverse Vγ chains to form their TCR. Our knowledge about the antigenic specificity and costimulation requirements of human Vδ2− γδ T cells remains limited. In an attempt to address this important issue, we characterized the specificity of a monoclonal antibody (mAb 256), screened for its ability to specifically inhibit cytolytic responses of several human Vδ2− γδ T-cell clones against transformed B cells. We show that mAb 256 does not target a TCR ligand but blocks key interactions between non-TCR molecules on effector γδ T cells and ILT2 molecule, expressed by tumor targets. In line with the previously reported specificity of this NK receptor for classic and nonclassic major histocompatibility complex (MHC) class I molecules, blockade of MHC class I/ILT2 interactions using MHC class I- or ILT2-specific mAbs and ILT2-Fc molecules inhibited tumor-induced activation of Vγ8Vδ3 T-cell clones. Therefore, this study describes a new cytotoxic T lymphocyte activation pathway involving MHC class I engagement on γδ T cells." @default.
- W2002378629 created "2016-06-24" @default.
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- W2002378629 date "2011-03-10" @default.
- W2002378629 modified "2023-10-16" @default.
- W2002378629 title "Up-regulation of cytolytic functions of human Vδ2− γδ T lymphocytes through engagement of ILT2 expressed by tumor target cells" @default.
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- W2002378629 doi "https://doi.org/10.1182/blood-2010-09-309781" @default.
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