title: Antigen presentation by brain microvessel smooth muscle and endothelium.
abstract: It has been previously reported that cultured brain microvessel smooth muscle cells (SM) express major histocompatibility complex (MHC) class II antigen. Here we report that SM is able to present ovalbumin (OVA) antigen to an OVA-specific T cell hybridoma (A2.2E10) and also presents keyhole limpet hemocyanin (KLH) to a KLH-specific T cell clone (HDK-1). Both the class II expression and the antigen-presenting capacity of SM cells is increased by interferon-gamma stimulation. Antigen presentation by SM is also MHC restricted as it is blocked by anti-Ia monoclonal antibodies. In contrast to SM, brain endothelium (En) presents whole OVA, digested OVA and KLH poorly, to a much lesser degree than SM, to the same antigen-specific T cells.
authors.affiliation: Department of Pathology, University of Iowa College of Medicine, Iowa City 52242.
authors.forename: Z
authors.initials: Z
authors.lastname: Fabry
authors.forename: M M
authors.initials: MM
authors.lastname: Waldschmidt
authors.forename: S A
authors.initials: SA
authors.lastname: Moore
authors.forename: M N
authors.initials: MN
authors.lastname: Hart
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000938:Antigen-Presenting Cells / Q000276:immunology*; D001921:Brain / Q000098:blood supply* / Q000276:immunology; D002196:Capillaries / Q000166:cytology / Q000276:immunology; D004730:Endothelium, Vascular / Q000276:immunology*; D005260:Female; D005786:Gene Expression Regulation; D000949:Histocompatibility Antigens Class II / Q000096:biosynthesis / Q000502:physiology; D007371:Interferon-gamma / Q000502:physiology; D051379:Mice; D008807:Mice, Inbred BALB C; D009131:Muscle, Smooth, Vascular / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000949:Histocompatibility Antigens Class II; D007371:Interferon-gamma