... catabolism by regulatory T cells. Nat Immunol2003, 4:1206-1212.32. Yoshida R, Nukiwa T, Watanabe Y, Fujiwara M, Hirata F, Hayaishi O:Regulation of indoleamine 2,3-dioxygenase activity in the smallintestine ... citation purposes)Tolerogenic DCs are immature, maturation-resistant, or alter-natively activated DCs that express surface MHC moleculesand have a low ratio of costimulatory to inhibitory signals, ... USA) and water ad libitum. All experimental proce-dures were examined and approved by the Animal ResearchEthics Committee at the Catholic University of Korea.Preparation of type II collagenBovine...