In a recent Mexican study on 46 AIH patients, serum levels of IL-17A and IL-22, which among other members of the IL-17 cytokine family is a key cytokine produced by Th17 cells, were similar in AIH and healthy controls, while levels of IL-17F were elevated in AIH, correlating with serum transaminase levels [79]. Here, IL17F is linked to autoimmune hepatitis.