TSLP and atopic eczema: Cytokines released by keratinocytes in atopic dermatitis, e.g., thymic stromal lymphopoietin (TSLP), alter LC’s ability to induce adaptive immune responses (13, 14), while “homeostatic” cytokines, such as TGF-β, inhibit LC maturation in situ and are critical for LC retention in the epidermis (15, 16).