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Immunology. 2011 Sep;134(1):8-16. doi: 10.1111/j.1365-2567.2011.03465.x. Epub 2011 Jul 4.

The interleukin-17 cytokine family: critical players in host defence and inflammatory diseases.

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Department of Immunology, Genentech Inc., South San Francisco, CA, USA.


The interleukin-17 (IL-17) cytokines, IL-17A to IL-17F, are emerging as critical players in host defence responses and inflammatory diseases. Substantial data support the role of these proteins in innate and adaptive immunity. Of these family members, IL-17A, IL-17F and IL-17E have been the best studied. Both IL-17A and IL-17F contribute to the host response to extracellular bacteria and fungi, and IL-17E has been shown to play a role in parasitic infections. In addition, numerous pre-clinical and clinical studies link these proteins to the pathogenesis of inflammatory diseases, and a number of therapeutic programmes targeting these family members are in clinical development. This review will highlight the cellular sources, receptors/target cells, and role in inflammation of these and the less-characterized family members, IL-17B, IL-17C and IL-17D.

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