The proinflammatory cytokine IL-17 is known to be an important factor in the pathogenesis of autoimmune joint diseases such as rheumatoid arthritis and spondyloarthritis, and therapies targeting this cytokine have shown promise. Although type 17 T helper cells are generally considered to be the main source of IL-17 in these diseases, the range of cell types that secrete this cytokine continues to expand; in particular, mast cells are receiving increased attention. Herein, the authors discuss the potential contribution of IL-17-secreting mast cells to inflammatory joint disease.
- Tony J. Kenna
- Matthew A. Brown