title: Requirement for MHC class II positive accessory cells in an antigen specific bovine T cell response.
abstract: Purified populations of bovine antigen presenting cells (APCs) and T cells have been isolated from peripheral blood and characterised using various monoclonal antibodies (mAbs) for cell surface markers. Bovine APCs were found in an adherent cell fraction and were non-specific esterase positive, phagocytic and expressed bovine major histocompatibility complex (MHC) class II determinants, all of which are typical macrophage characteristics. T cells were rigorously depleted of accessory cell function before being used in an antigen presenting cell assay. The generation of T helper cells in response to the soluble antigen, ovalbumin, was entirely dependent upon a critical number of APCs. Further the proliferative response was inhibited by several mAbs to bovine MHC class II molecules. Thus the interaction between bovine APCs and helper/inducer T lymphocytes (TH/I) appears to be similar to that in other species.
authors.affiliation: AFRC Institute of Animal Physiology and Genetics Research, Edinburgh.
authors.forename: E J
authors.initials: EJ
authors.lastname: Glass
authors.forename: R L
authors.initials: RL
authors.lastname: Spooner
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000938:Antigen-Presenting Cells / Q000276:immunology*; D002417:Cattle / Q000276:immunology*; D005260:Female; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D008213:Lymphocyte Activation; D008297:Male; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000949:Histocompatibility Antigens Class II