CD4 and autoimmune hepatitis: AIH patients undergoing an active state had significantly decreased numbers of CD3+CD4+CD25+Foxp3+Tregs and increased numbers of CD3+CD4+CD25−Foxp3+T, CD3+CD4+IFN-γ+Th1, CD3+CD4+IL-17+Th17, and CD3+CD4+IL-2+Th22 cells as well as higher levels of Th1/Th17/Th22-type cytokines compared to AIH patients in remission and HC.