title: Mechanisms of oral tolerance revisited.
abstract: Oral tolerance induction is thought to depend on special antigen presenting cells in the gut. A new report in the previous issue of Arthritis Research & Therapy supports this idea by demonstrating that indoleamine 2,3-dioxygenase-expressing dendritic cells in Peyer's patches from orally tolerized mice suppress T-cell responses via the generation of CD4+CD25+ regulatory T cells. This finding provides novel input into the mechanisms of oral tolerance that could further facilitate its use for the treatment of autoimmunity and chronic inflammatory reactions.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Rene E M
authors.initials: RE
authors.lastname: Toes
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000941:Antigens / Q000008:administration & dosage* / Q000276:immunology; D003713:Dendritic Cells / Q000201:enzymology / Q000276:immunology; D006801:Humans; D007108:Immune Tolerance; D050503:Indoleamine-Pyrrole 2,3,-Dioxygenase / Q000276:immunology / Q000378:metabolism
chemical_list: D000941:Antigens; D050503:Indoleamine-Pyrrole 2,3,-Dioxygenase