title: CD4(+) regulatory T cells in autoimmunity and allergy.
abstract: Regulatory T cells (also referred to as suppressor T cells) are important components of the homeostasis of the immune system, as impaired regulatory T cell activity can cause autoimmune diseases and atopy. It is now clear that the phrase 'regulatory T cells' encompasses more than one cell type. For instance, CD4(+)CD25(+) regulatory T cells have received attention due to their immunosuppressive properties in vitro and in vivo, but in several instances it has been shown that CD4(+)CD25(-) T cell populations also contain potent regulatory activity. Recent progress in the field of regulatory T cells includes the discovery of the role of two tumor necrosis factor receptor (TNFR) family members (GITR and TRANCE-R/RANK) in Treg biology, the improved understanding of the role of co-stimulatory molecules and cytokines IL-10 and IL-2 in the induction and function of Tregs, and the generation of CD25(+) and CD25(-) regulatory T cells in vivo through high-avidity T cell receptor interactions.
authors.affiliation: Program of Molecular Pathogenesis, Skirball Institute of Biomolecular Medicine, and Department of Pathology New York University School of Medicine, New York, NY 10016, USA. curotto@saturn.med.nyu.edu
authors.forename: Maria A
authors.initials: MA
authors.lastname: Curotto de Lafaille
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Lafaille
mesh_terms: D000818:Animals; D001327:Autoimmune Diseases / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology*; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis; D015375:Receptors, Interleukin-2 / Q000276:immunology; D018124:Receptors, Tumor Necrosis Factor / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D015375:Receptors, Interleukin-2; D018124:Receptors, Tumor Necrosis Factor