IL31 and dermatitis: However, we demonstrated that Il31−/− mice showed normal migration and maturation of skin DCs and induction of hapten-specific T cells in the sensitization phase of FITC-induced CHS, and normal induction of local inflammation in the elicitation phase of FITC- and DNFB-induced CHS, indicating that IL-31 is not essential for induction of skin inflammation during FITC- or DNFB-induced CHS.