In line with the dermal inflammatory reaction, Δ/Δep2 epidermis was characterized by the robust expression of the keratinocyte activation marker K6, of the cell adhesion molecule ICAM1, and by the sporadic expression of MHC class II molecules (Figure 1E), all upregulated in inflammatory conditions including atopic dermatitis (Freedberg et al., 2001; Fan et al., 2003; Caughman et al., 1992). Here, ICAM1 is linked to atopic eczema.