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- W4317869824 abstract "Among many factors known to alter the outcomes of T cell receptor (TCR)-induced proximal signaling, the role of human germline variants in dictating the individuality of the anti-tumor CD8 T cell response has remained challenging to address. Here, we describe a convenient strategy for molecular and functional characterization of phosphotyrosine-altering non-synonymous single nucleotide variations (pTyr-SNVs) that directly impact TCR-induced proximal phosphotyrosine motif-based signaling pathways. We devise an experimental co-cultivation set-up comprising a C57BL/6 mouse-derived metastatic melanoma cell line engineered to constitutively present ovalbumin (OVA) antigens and retrovirally engineered syngeneic major histocompatibility complex (MHC) Class I restricted OVA TCR-transgenic CD8 T cells (OT-I). Using the synthetic version of pTyr-SNV rs1178800678-G/T-encoding integrin alpha 4 (ITGA4) p.S1027I variant as a prototype, we show that under identical TCR stimulation conditions, genetically determined membrane-proximal immunoreceptor tyrosin activation motif (ITAM) results in increased tyrosine phosphorylation of 70 kDa zeta-chain-associated protein (ZAP70) and the levels of cytotoxic effector molecule granzyme B (GZMB), which in turn result in enhanced cytotoxic activity against metastatic melanoma cell line. This strategy paves the way for rapid molecular and functional characterization of anti-tumor immune response-linked germline pTyr-SNVs so as to improve our understanding of the genetic basis of individual-to-individual differences in anti-tumor CD8 T cell response." @default.
- W4317869824 created "2023-01-25" @default.
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- W4317869824 date "2023-05-01" @default.
- W4317869824 modified "2023-10-08" @default.
- W4317869824 title "A strategy for uncovering germline variants altering anti-tumor CD8 T cell response" @default.
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- W4317869824 doi "https://doi.org/10.1016/j.jgg.2023.01.001" @default.
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