Circulating soluble tumor necrosis factor receptors, interleukin‐2 receptors, tumor necrosis factor α, and interleukin‐6 levels in rheumatoid arthritis.

Abstract

Measurement of circulating sIL-2R, p55, and IL-6 may be useful in the evaluation of RA disease activity and response to therapy. Interference by circulating levels of drugs must be ruled out when bioassays are used to evaluate cytokine levels.