Some recent studies confirmed that IL10 (encoding IL‐10) and FOXP1 (encoding Foxp1) participate in maintaining the balance of the immune system by regulating the methylation frequency of FOXP3 and formation of Foxp1/Foxp3 heterodimer [45, 46, 47], whereas reduction in expression and deficiencies in function of Foxp3 are hypothesized to contribute to the pathogenesis of AIH [48]. Here, FOXP1 is linked to autoimmune hepatitis.