Affiliation:
1. Bath Institute for Rheumatic Diseases and Pharmacology Group, University of Bath, Bath, England
Abstract
SUMMARY
An impermeable thiol blocker has been used to investigate the role of sulphydryl (SH) groups in the production of and responsiveness to IL-2 by normal human T lymphocytes. Surface SH blockade of mononuclear cells prior to incubation with mitogen (phytohaemagglutinin, concanavalin A, CD3 MoAb) had no effect on production of IL-2 but markedly impaired cellular responsiveness to exogenous IL-2. Studies using MoAbs indicated that this effect was accompanied by decreased expression of both the CD25 and p75 subunits of the IL-2 receptor. Blocking surface SH groups did not affect binding of IL-2 to p75 on unstimulated mononuclcar cells, but inhibited binding to high-affinity receptors on a T lymphoma cell line. The data are consistent with the hypothesis that sulphydryl groups on the IL-2 receptor are required for its function and may be involved in the interaction of the CD25 and p75 subunits leading to generation of the high-affinity binding site. The surface thiol identified on the IL-2 receptor may be a candidate for oxidation on cells from patients with chronic inflammatory diseases such as rheumatoid arthritis and thus contribute to the aberrant function of T cells in these patients.
Publisher
Oxford University Press (OUP)
Subject
Immunology,Immunology and Allergy
Reference25 articles.
1. Inhibition of lectin-induced lymphocyte activation by diamide and other sulphydryl reagents;Chaplin;Cell Immunol,1978
2. Defective monocyte accessory function due to surface sulphydryl (SH) oxidation in rheumatoid arthritis;McKeown;Clin Exp Immunol,1984
3. Altered lymphocyte reactivity in rheumatoid arthritis;Silverman;Arthritis Rheum,1976
4. Lymphocyte studies in rheumatoid arthritis. III. A comparative study of the responses of peripheral blood and synovial fluid lymphocytes to phytomitogens;Corrigall;Scand J Rheumalol,1979
5. Prostaglandins and the regulation of lymphocyte function in rheumatoid arthritis (RA);Corrigall;Ann Rheum Dis,1979
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献