Results from WB in Figure 2A show that WM1552C melanoma cells increase Snail expression after exposure to epidermal keratinocytes (1.49-fold of reference +/− 0.085, p < 0.05) and dermal fibroblasts (1.88-fold of reference +/− 0.18, p < 0.05). This evidence concerns the gene SNAI1 and melanoma.