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- W1620097935 abstract "We show here that IL-17-secreting CD4 T (Th)17 and CD8 T (Tc)17 effector cells are found in the lung following primary challenge with influenza A and that blocking Ab to IL-17 increases weight loss and reduces survival. Tc17 effectors can be generated in vitro using naive CD8 T cells from OT-I TCR-transgenic mice. T cell numbers expand 20-fold and a majority secretes IL-17, but little IFN-gamma. Many of the IL-17-secreting cells also secrete TNF and some secrete IL-2. Tc17 are negative for granzyme B, perforin message, and cytolytic activity, in contrast to Tc1 effectors. Tc17 populations express message for orphan nuclear receptor gammat and FoxP3, but are negative for T-bet and GATA-3 transcription factors. The FoxP3-positive, IL-17-secreting and IFN-gamma-secreting cells represent three separate populations. The IFN-gamma-, granzyme B-, FoxP3-positive cells and cells positive for IL-22 come mainly from memory cells and decrease in number when generated from CD44(low) rather than unselected CD8 T cells. Cells of this unique subset of CD8 effector T cells expand greatly after transfer to naive recipients following challenge and can protect them against lethal influenza infection. Tc17 protection is accompanied by greater neutrophil influx into the lung than in Tc1-injected mice, and the protection afforded by Tc17 effectors is less perforin but more IFN-gamma dependent, implying that different mechanisms are involved." @default.
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- W1620097935 date "2009-03-15" @default.
- W1620097935 modified "2023-10-17" @default.
- W1620097935 title "Tc17, a Unique Subset of CD8 T Cells That Can Protect against Lethal Influenza Challenge" @default.
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- W1620097935 doi "https://doi.org/10.4049/jimmunol.0801814" @default.
- W1620097935 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2667713" @default.
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- W1620097935 hasPublicationYear "2009" @default.
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