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- W2104773141 abstract "Abstract Expression of the physiological cellular prion protein (PrPC) is remarkably regulated during differentiation and activation of cells of the immune system. Among these, dendritic cells (DCs) display particularly high levels of membrane PrPC, which increase upon maturation, in parallel with that of molecules involved in Ag presentation to T cells. Freshly isolated mouse Langerhans cells, dermal DCs, and DCs from thymus, spleen, and mesenteric lymph nodes expressed low to intermediate levels of PrPC. Highest levels of both PrPC and MHC class II molecules were displayed by lymph node CD8αint DCs, which represent fully mature cells having migrated from peripheral tissues. Maturation induced by overnight culture resulted in increased levels of surface PrPC, as did in vivo DC activation by bacterial LPS. Studies on Fms-like tyrosine kinase 3 ligand bone marrow-differentiated B220− DCs confirmed that PrPC expression followed that of MHC class II and costimulatory molecules, and correlated with IL-12 production in response to TLR-9 engagement by CpG. However, at variance with conventional DCs, B220+ plasmacytoid DCs isolated from the spleen, or in vitro differentiated, did not significantly express PrPC, both before and after activation by TLR-9 engagement. PrP knockout mice displayed higher numbers of spleen CD8α+ DCs, but no significant differences in their maturation response to stimulation through TLR-4 and TLR-9 were noticed. Results are discussed in relation to the functional relevance of PrPC expression by DCs in the induction of T cell responses, and to the pathophysiology of prion diseases." @default.
- W2104773141 created "2016-06-24" @default.
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- W2104773141 date "2006-11-01" @default.
- W2104773141 modified "2023-10-17" @default.
- W2104773141 title "Prion Protein Expression by Mouse Dendritic Cells Is Restricted to the Nonplasmacytoid Subsets and Correlates with the Maturation State" @default.
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- W2104773141 doi "https://doi.org/10.4049/jimmunol.177.9.6137" @default.
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