Evidence for Enhanced Interleukin 2 (IL-2) Secretion and IL-2 Receptor Presentation by Synovial Fluid Lymphocytes in Rheumatoid Arthritis
Overview
Affiliations
Synovial fluid lymphocytes (SFL) and peripheral blood lymphocytes (PBL) from patients with rheumatoid arthritis (RA) and reactive oligoarthritis were investigated for activated T cells (Ia+SIg-), IL-2 receptor bearing cells (Tac+) and IL-2 production in vivo and in vitro. In contrast to negative results with blood, the synovial fluid of the arthritic joints contains considerable amounts of IL-2 activity (median: 11.8 mu/ml), elevated proportions of Ia+SIg- activated T cells (median: 12.5%) and of IL-2 receptor bearing cells (median: 2.5%). In vitro, after stimulation with several Concanavalin A (Con A) doses, SFL develop proportions of IL-2 receptor cells comparable to PBL. Furthermore, they produce higher values of IL-2 activity than comparable PBL cultures. The proportions of Ia+SIg- activated T cells increase only moderately after Con A stimulation compared to in vivo data, indicating different activated T cell subsets in the synovial fluid (Ia+SIg-, Tac+). The findings are discussed as an expression of an acute hyperactivation of lymphocytes in an inflamed joint.
Cellular aspects of myasthenia gravis.
Berrih-Aknin S, Cohen-Kaminsky S, Neumann D, Safar D, Eymard B, Gaud C Immunol Res. 1988; 7(3):189-99.
PMID: 3264005 DOI: 10.1007/BF02918134.
Firestein G, Xu W, Townsend K, Broide D, Alvaro-Gracia J, Glasebrook A J Exp Med. 1988; 168(5):1573-86.
PMID: 3263464 PMC: 2189111. DOI: 10.1084/jem.168.5.1573.
Interleukin 2 inhibitor in synovial fluid.
Emery P, GENTRY K, Kelso A, Mackay I Clin Exp Immunol. 1988; 72(1):60-6.
PMID: 3260839 PMC: 1541502.
Buchan G, Barrett K, Fujita T, Taniguchi T, Maini R, Feldmann M Clin Exp Immunol. 1988; 71(2):295-301.
PMID: 3127092 PMC: 1541449.
Lorberboum-Galski H, Fitzgerald D, Chaudhary V, Adhya S, Pastan I Proc Natl Acad Sci U S A. 1988; 85(6):1922-6.
PMID: 3126499 PMC: 279893. DOI: 10.1073/pnas.85.6.1922.