title: Expression of HLA-DR, DQ and DP antigens and interleukin-2 receptor on synovial fluid T lymphocyte subsets in rheumatoid arthritis: evidence for "frustrated" activation.
abstract: Synovial fluid and peripheral blood T lymphocytes were examined from 10 patients with rheumatoid arthritis and 2 controls. T lymphocytes from inflammatory fluids were activated as shown by their increased size and expression of class II MHC antigens. Of the T cells, 60% were DR positive, 19% DP positive and 29% DQ positive. More Leu 2a than Leu 3a cells were HLA-DR positive. In contrast, few T cells expressed Tac. We conclude that T cell activation is taking place but is incomplete or "frustrated".
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005260:Female; D006681:HLA-D Antigens / Q000276:immunology*; D006682:HLA-DP Antigens / Q000276:immunology; D006683:HLA-DQ Antigens / Q000276:immunology; D006684:HLA-DR Antigens / Q000276:immunology; D006801:Humans; D007376:Interleukin-2 / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D011971:Receptors, Immunologic / Q000276:immunology*; D015375:Receptors, Interleukin-2; D013582:Synovial Fluid / Q000166:cytology* / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D006681:HLA-D Antigens; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D007376:Interleukin-2; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2