In patients with AIH, the expression of Th 17 and Th 17-related cytokines (IL-17) was significantly elevated in the liver and peripheral blood, and the number of Th 17 cell infiltrates was strongly correlated with the severity of liver inflammation (Zhao et al., 2011; Beringer and Miossec, 2018). This evidence concerns the gene IL17A and autoimmune hepatitis.