Human epidermal Langerhans cells maintain immune homeostasis in skin by activating skin resident regulatory T cells.
Seneschal J, Clark RA, Gehad A, Baecher-Allan CM, Kupper TS. Human epidermal Langerhans cells maintain immune homeostasis in skin by activating skin resident regulatory T cells. Immunity. 2012 May 25; 36(5):873-84.