IL17A and autoimmune hepatitis: In this study, we found a strong Th1 and Th17 proinflammatory response with increased levels of serum/liver Th1-type (IFN-γ) and Th17-type (IL-17A) cytokines in AIH patients undergoing an active state and EAH mice, indicating that Th1 and Th17 cells have critical functions in the pathogenic process of AIH, which were consistent with previous studies [6–9].