Co-expression of membrane-bound TNF-alpha type 1 and 2 receptors differ in the subsets of immunocompetent cells.

The immunoregulatory cytokine tumor necrosis factor α plays crucial roles in the pathogenesis of a broad spectrum of disorders. However, its effect may depend on the expression and co-expression of receptors on the target cell. The aim of the present study was to evaluate the expression levels of type 1 and 2 tumor necrosis factor α receptors (TNFR1/2) on individual cell subsets from peripheral blood of healthy volunteers. Flow cytometry analysis was used to study whole populations as well as subsets (T regulatory cells, T memory cells, cytotoxic T cells, T helper cells). Significant differences in the co-expression of TNFR1/2 were seen within subsets and total pools. Further studies are necessary to explore the implications of the observed differences in the modulation of tumor necrosis factor α function in health and pathology.