Cytokine induction of adhesion molecules on synovial type B cells.

Abstract

To study the role of cytokines on adhesion molecule expression and binding of activated T cells to synovial type B cells. Adhesion molecule expression was examined by immunofluorescence and adhesion of 51Cr-labelled T cells to the synovial cells determined. Tumor necrosis factor alpha/interferon gamma (TNF alpha/IFN-gamma) and interleukin 1 alpha (IL-1 alpha)/IFN-gamma enhanced adhesion molecule expression and the adhesion of T cells to synovial cells. Anti-intercellular adhesion molecule 1 blocked adhesion of T cells to TNF alpha/IFN-gamma and IL-1 alpha/IFN-gamma stimulated synovial cells while an antibody to CD61 blocked adhesion to IL-1 alpha/IFN-gamma stimulated cells. The interaction of leukocytes with adhesion molecules on synovial cells may play a role in recruitment of these cells to an inflammatory site.