Plasmacytoid Dendritic Cells Mediate Oral Tolerance

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Plasmacytoid dendritic cells mediate oral tolerance.

Oral tolerance prevents oral sensitization to dietary antigens (Ags), including proteins and haptens, and development of delayed-type hypersensitivity (DTH) responses. We showed here that plasmacytoid dendritic cells (pDCs) prevented oral T cell priming and were responsible for systemic tolerance to CD4(+) and CD8(+) T cell-mediated DTH responses induced by Ag feeding. Systemic depletion of pDC...

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Dendritic cells (DCs) are a heterogeneous family of professional APCs involved in priming adaptive immune responses. Donor DCs (direct pathway of allorecognition) and recipient DCs presenting processed donor major histocompatibility complex (MHC) as peptides (indirect pathway of allorecognition) participate actively in graft rejection by stimulating recipient T cell responses following organ tr...

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Plasmacytoid dendritic cells in angiolymphoid hyperplasia with eosinophilia

Background: Angiolymphoid hyperplasia with eosinophilia (ALHE) is characterized by irregularly-shaped blood vessels with an inflammatory infiltrate. While absent from normal skin, plasmacytoid dendritic cells (pDCs) infiltrate the skin upon injury and during several infectious, inflammatory, and neoplastic entities. In addition to providing anti-viral resistance, pDCs link the innate and adapti...

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Oral dendritic cells mediate antigen-specific tolerance by stimulating TH1 and regulatory CD4+ T cells.

BACKGROUND A detailed characterization of oral antigen-presenting cells is critical to improve second-generation sublingual allergy vaccines. OBJECTIVE To characterize oral dendritic cells (DCs) within lingual and buccal tissues from BALB/c mice with respect to their surface phenotype, distribution, and capacity to polarize CD4(+) T-cell responses. METHODS In situ analysis of oral DCs was p...

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ژورنال

عنوان ژورنال: Immunity

سال: 2008

ISSN: 1074-7613

DOI: 10.1016/j.immuni.2008.06.017