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- W2100070721 abstract "It was recently reported that inhibitory molecules such as programmed death-1 (PD-1) were upregulated on CD8(+) T cells during acute Friend retrovirus infection and that the cells were prematurely exhausted and dysfunctional in vitro. The current study confirms that most activated CD8(+) T cells upregulated expression of PD-1 during acute infection and revealed a dichotomy of function between PD-1(hi) and PD-1(lo) subsets. More PD-1(lo) cells produced antiviral cytokines such as IFN-γ and TNF-α, whereas more PD-1(hi) cells displayed characteristics of cytotoxic effectors such as production of granzymes and surface expression of CD107a. Importantly, CD8(+) T cells mediated rapid in vivo cytotoxicity and were critical for control of acute Friend virus replication. Thus, direct ex vivo analyses and in vivo experiments revealed high CD8(+) T cell functionality and indicate that PD-1 expression during acute infection is not a marker of T cell exhaustion." @default.
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- W2100070721 date "2011-08-26" @default.
- W2100070721 modified "2023-10-14" @default.
- W2100070721 title "Virus-Specific CD8<sup>+</sup>T Cells Upregulate Programmed Death-1 Expression during Acute Friend Retrovirus Infection but Are Highly Cytotoxic and Control Virus Replication" @default.
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- W2100070721 doi "https://doi.org/10.4049/jimmunol.1101612" @default.
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