Monitoring UV‐induced signalling pathways in an ex vivo skin organ culture model using phospho‐antibody array

We investigated UV-induced signaling in an ex vivo skin organ culture model using phospho-antibody array. Phosphorylation modulations were analyzed in time-course experiments following exposure to solar-simulated UV and validated by western blot analyses. We found that UV induced P-p38 and its substrates, P-ERK1/2 and P-AKT which were previously shown to be upregulated by UV in cultured keratinocytes and in vivo human skin. This indicates that phospho-antibody array applied to ex vivo skin organ culture is a relevant experimental system to investigate signaling events following perturbations. Since the identified proteins are components of pathways implicated in skin tumorigenesis, UV-exposed skin organ culture model could be used to investigate the effect on these pathways of NMSC cancer drug candidates. In addition, we found that phospho-HCK is induced upon UV exposure, producing a new candidate for future studies investigating its role in the skin response to UV and UV-induced carcinogenesis. This article is protected by copyright. All rights reserved.