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- W4313430122 abstract "Abstract TRM constitute a recently identified lymphocyte lineage that occupies non-lymphoid tissues (NLT) without recirculating. Experiments in mice demonstrated that TRM reactivation triggers antiviral responses in neighboring cells by promoting local stimulation of innate and adaptive immune cells, and by recruiting immune effectors. Collectively this is referred to as ‘sensing and alarm’ function. We wished to broadly identify TRM functions in non-human primates (NHP). Here we applied a prime-boost vaccine modality in rhesus macaques to generate abundant SIVgag-specific CD8 TRM in the female reproductive tract (FRT) and 14 other NLT. To assess sensing and alarm function, macaques were challenged intravaginally with CM9 peptide from the SIV gag protein and necropsied 24 or 48 hours later. CD8 TRM reactivation increased expression of CD69 and granzyme B in SIV-gag specific CD8 T cells throughout the FRT at 24h, in situ proliferation (Ki67 expression) by 48h, and rapid antiviral and IFN response gene expression in essentially all hematopoietic and non-hematopoietic cells by 24h. Upregulation of effector genes in CD8 T cells, CD4 T cells, NK cells, and ILCs peaked at 24h and persisted at 48h. Mucosal CD4 T cells expressed various HIV restriction factors, and had reduced expression of the HIV-coreceptor CCR5. Increased numbers of vaginal T and B cells coincided with increased expression of chemokines and VCAM-1 on endothelial and stromal cells and a concomitant reduction in circulating T cells, B cells and SIV-env-specific B cells. These data demonstrate that vaccine-elicited CD8 TRM rapidly trigger local activation and the recruitment of innate, cellular, and humoral immune responses to the site of antigen exposure." @default.
- W4313430122 created "2023-01-06" @default.
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- W4313430122 date "2022-05-01" @default.
- W4313430122 modified "2023-09-26" @default.
- W4313430122 title "Sensing and alarm function of vaccine-elicited SIV-gag specific CD8 TRM in the reproductive mucosa of rhesus macaques" @default.
- W4313430122 doi "https://doi.org/10.4049/jimmunol.208.supp.114.15" @default.
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