Published in:
Open Access
01-02-2000 | Research article
Specificity of T cells in synovial fluid: high frequencies of CD8+ T cells that are specific for certain viral epitopes
Authors:
Linda C Tan, Alastair G Mowat, Chrysoula Fazou, Tim Rostron, Helen Roskell, P Rod Dunbar, Claire Tournay, François Romagné, Marie-Alix Peyrat, Elisabeth Houssaint, Marc Bonneville, Alan B Rickinson, Andrew J McMichael, Margaret FC Callan
Published in:
Arthritis Research & Therapy
|
Issue 2/2000
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Statement of findings
CD8+ T cells dominate the lymphocyte population insynovial fluid in chronic inflammatory arthritis. It is known that theseCD8+ T cells are often clonally or oligoclonally expanded, but theirspecificity and their relevance to the pathogenesis of joint disease hasremained unclear. We found that as many as 15.5% of synovial CD8+ Tcells may be specific for a single epitope from an Epstein-Barr virus lyticcycle protein. The virus-specific T cells within the joint showed increasedexpression of markers of activation and differentiation compared with those inthe periphery, and retained their functional capacity to secreteproinflammatory cytokines on stimulation. These activated, virus-specificCD8+ T cells could therefore interact with synoviocytes, either bycell-cell contact or by a cytokine network, and play a 'bystander'role in the maintenance of inflammation in patients with arthritis.