title: Immune functions of human synovial cells. Phenotypic and T cell regulatory properties of macrophage-like cells that express HLA-DR.
abstract: Normal and rheumatoid synovial cells have been analyzed in frozen sections and in suspension. HLA-DR-expressing, macrophage-like cells are demonstrated in normal synovial intima and in rheumatoid tissue. Suspended normal synoviocytes equaled peripheral blood non-T lymphocytes as stimulators of mixed lymphocyte reactions, whereas adherent rheumatoid synovial cells were extremely efficient as such stimulators and in presenting soluble antigens to autologous T lymphocytes. This HLA-DR-dependent T lymphocyte regulation might provide a cellular basis for the HLA-D haplotype-arthritis associations.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D001172:Arthritis, Rheumatoid / Q000276:immunology / Q000473:pathology; D004950:Esterases / Q000096:biosynthesis; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007959:Lymphocyte Culture Test, Mixed; D008264:Macrophages / Q000276:immunology*; D010641:Phenotype; D011961:Receptors, Fc / Q000276:immunology; D013583:Synovial Membrane / Q000166:cytology / Q000201:enzymology / Q000276:immunology* / Q000473:pathology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D011961:Receptors, Fc; D004950:Esterases