Activation of CD25+CD4+ Regulatory T Cells by Oral Antigen Administration

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Activation of CD25(+)CD4(+) regulatory T cells by oral antigen administration.

CD25(+)CD4(+) T cells are naturally occurring regulatory T cells that are anergic and have suppressive properties. Although they can be isolated from the spleens of normal mice, there are limited studies on how they can be activated or expanded in vivo. We found that oral administration of OVA to OVA TCR transgenic mice resulted in a modification of the ratio of CD25(+)CD4(+) to CD25(-)CD4(+) c...

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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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Regulatory T cells participate in immunologic homeostasis by active suppression of inappropriate immune responses. Regulatory T lymphocytes expressing CD4 and CD25 antigens and naturally present in the peripheral blood were the first to be phenotypically characterized. However, their small number and antigen nonspecific suppression has prompted efforts to identify and dissect antigen-specific r...

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ژورنال

عنوان ژورنال: The Journal of Immunology

سال: 2001

ISSN: 0022-1767,1550-6606

DOI: 10.4049/jimmunol.167.8.4245