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- W4313405787 abstract "Abstract Core fucosylation (CF) of N-linked glycans is indispensable for normal physiology, but whether CF regulates any aspect of T cell activation, differentiation, or function remains unknown. Fucosyltransferase 8 (Fut8) is the only enzyme in mammals that catalyzes CF and following activation, both expression of Fut8 and CF synthesis increases on CD8+ T cells. To test the hypothesis that CF of N-glycans regulates memory T cell differentiation following acute viral infection, we generated mice with a floxed Fut8 gene. WT (CD4-Cre−) and Fut8−/− (CD4-Cre+) mice were infected with LCMV Armstrong (LCMV-Arm) and the differentiation of LCMV-specific CD8+ T cells was analyzed by measuring the surface expression of killer-cell lectin like receptor G1 (KLRG1) and the α chain of interleukin 7 receptor (CD127) to identify short-lived effector and memory precursor T cells, respectively. LCMV-specific CD8+ T cells from both WT and Fut8−/− followed the same pattern of expansion and contraction without any significant difference in the overall frequency of LCMV-specific CD8+ T cells. However, Fut8−/− retained a higher percentage of CD127+KLRG1− and a lower percentage of KLRG1+CD127− CD8 T cells throughout the course of infection suggesting CF influences the progression to long-term memory. At day 42 post infection, mice were infected with virulent Listeria monocytogenes expressing the LCMV epitope GP33–41. Both WT and Fut8−/− GP33-specific CD8+ T cells expanded equally. However, Fut8−/− retained a higher frequency of GP33-specific CD8+ T cells and did not undergo contraction until >3 weeks post-2ry challenge. Taken together, our findings suggest that CF of N-linked glycans regulates memory CD8+ T cell differentiation following acute viral infection. Supported by grants from NIH (R21 AI159401)" @default.
- W4313405787 created "2023-01-06" @default.
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- W4313405787 date "2022-05-01" @default.
- W4313405787 modified "2023-09-23" @default.
- W4313405787 title "Core fucosylation of N-linked glycans: a novel player in memory CD8+ T cell differentiation following acute viral infection" @default.
- W4313405787 doi "https://doi.org/10.4049/jimmunol.208.supp.110.10" @default.
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