“…In mammals, interleukin 17 is a member of the proinflammatory cytokine family, it bridges the innate and adaptive arms of the immune system, and is mainly produced by a subset of T helper (Th) cells named Th17 (Moisan et al, 2007). Two forms, IL-17A and F, play an important role in host defence via the induction of proinflammatory gene expression, promoting cell infiltration and production of several proinflammatory cytokines and chemokines (Hartupee et al, 2007;Mesquita et al, 2009). These two genes are present in tandem on the same chromosome.…”