title: CD4+CD25+ regulatory T cells suppress differentiation and functions of Th1 and Th2 cells, Leishmania major infection, and colitis in mice.
abstract: Regulatory T cells play a major role in modulating the immune response. However, most information on these cells centers on autoimmunity, and there is also considerable controversy on the functional characteristics of these cells. Here we provide direct in vitro and in vivo evidence that CD4+CD25+ regulatory T cells inhibit the differentiation and functions of both Th1 and Th2 cells. Importantly, CD4+CD25+ T cells suppressed the disease development of Leishmania major infection in SCID mice reconstituted with naive CD4+CD25- T cells. Furthermore, CD4+CD25+ T cells inhibited the development of colitis induced by both Th1 and Th2 cells in SCID mice. Our results therefore document that CD4+CD25+ regulatory T cells suppress both Th1 and Th2 cells and that these regulatory T cells have a profound therapeutic potential against diseases induced by both Th1 and Th2 cells in vivo.
authors.affiliation: Department of Immunology and Bacteriology, University of Glasgow, Glasgow, Scotland, United Kingdom. d.xu@clinmed.gla.ac.uk
authors.forename: Damo
authors.initials: D
authors.lastname: Xu
authors.forename: Haiying
authors.initials: H
authors.lastname: Liu
authors.forename: Mousa
authors.initials: M
authors.lastname: Komai-Koma
authors.forename: Carol
authors.initials: C
authors.lastname: Campbell
authors.forename: Charlie
authors.initials: C
authors.lastname: McSharry
authors.forename: James
authors.initials: J
authors.lastname: Alexander
authors.forename: Foo Y
authors.initials: FY
authors.lastname: Liew
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D015704:CD4 Antigens / Q000096:biosynthesis*; D002454:Cell Differentiation / Q000276:immunology; D002478:Cells, Cultured; D003092:Colitis / Q000276:immunology / Q000473:pathology / Q000517:prevention & control*; D004195:Disease Models, Animal; D015536:Down-Regulation / Q000276:immunology*; D005260:Female; D018320:Leishmania major / Q000276:immunology; D016773:Leishmaniasis, Cutaneous / Q000276:immunology / Q000473:pathology / Q000517:prevention & control*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D016513:Mice, SCID; D015375:Receptors, Interleukin-2 / Q000096:biosynthesis*; D013154:Spleen / Q000166:cytology / Q000637:transplantation; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism / Q000637:transplantation; D018417:Th1 Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D018418:Th2 Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism
chemical_list: D015704:CD4 Antigens; D015375:Receptors, Interleukin-2