IL17A and Hepatic fibrosis: Tan et al., (2013) reported that IL-17has critical role in the pathogenesis of liver fibrosis, as IL-17 promoted proinflammatory cytokine expression, neutrophil influx, liver injury, inflammation, and fibrosis through hepatic stellate cell activation, so, there is increased level of IL-17 with increasing inflammation, fibrosis and cirrhosis.