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- W2045788339 abstract "Recognition of peptide Major Histocompatibility Complexes (MHC) by the T cell receptor causes rapid production of reactive oxygen intermediates (ROI) in naïve CD8(+) T cells. Because ROI such as H2O2 are membrane permeable, mechanisms must exist to prevent overoxidation of surface proteins. In this study we used fluorescently labeled conjugates of maleimide to measure the level of cell surface free thiols (CSFT) during the development, activation and differentiation of CD8(+) T cells. We found that during development CSFT were higher on CD8 SP compared to CD4 SP or CD4CD8 DP T cells. After activation CSFT became elevated prior to division but once proliferation started levels continued to rise. During acute viral infection CSFT levels were elevated on antigen-specific effector cells compared to memory cells. Additionally, the CSFT level was always higher on antigen-specific CD8(+) T cells in lymphoid compared to nonlymphoid organs. During chronic viral infection, CSFT levels were elevated for extended periods on antigen-specific effector CD8(+) T cells. Finally, CSFT levels on effector CD8(+) T cells, regardless of infection, identified cells undergoing TCR stimulation. Taken together these data suggest that CD8(+) T cells upregulate CSFT following receptor ligation and ROI production during infection to prevent overoxidation of surface proteins." @default.
- W2045788339 created "2016-06-24" @default.
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- W2045788339 date "2013-11-13" @default.
- W2045788339 modified "2023-10-15" @default.
- W2045788339 title "Increased Cell Surface Free Thiols Identify Effector CD8+ T Cells Undergoing T Cell Receptor Stimulation" @default.
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- W2045788339 doi "https://doi.org/10.1371/journal.pone.0081134" @default.
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