AHR and autoimmune encephalitis: AHR is well expressed in Th17 cells (but not in Th1 or Th2 cells) [64], and both in vitro activation studies and studies with AHR-deficient cells demonstrated its critical role for the production of the pro-inflammatory cytokine interleukin (IL)-22 in an experimental autoimmune encephalitis (EAE) disease setting.