The aim of this study was to analyze the effect of concomitant use of cannabigerol (CBG) and 3-O-ethylascorbic acid (EAA) on changes in the proteome of UVA-irradiated skin melanocytes, with particular emphasis on adduct formation between lipid peroxidation products and metabolically important proteins. Proteomic analysis allowed the identification of 1248 proteins with statistically significantly changed expression following melanocytes irradiation and/or incubation with CBG/EAA. The top 25 proteins with the most strongly differentially abundant expression included proteins involved in cell protection/antioxidant response, as well as pro-inflammatory and proapoptotic signalization. Moreover, in melanocytes irradiated with UVA, the levels of lipid peroxidation product, 4-hydroxynonenal (4-HNE) and its protein adducts were increased, as well as significant changes in the profile of proteins modified by 4-HNE were observed. CBG and EAA, especially when used together, largely reverse these effects. This study for the first time demonstrated the combined effect of CBG and EAA on the proteome of melanocytes after their exposure to UVA radiation, which applies to both changes in protein expression and intracellular signaling based on proteins modified by 4-HNE. It can be suggested that CBG and EAA may provide melanocytes with effective protection against the effects of oxidative stress and perhaps even protect the skin from carcinogenesis.
Mucha et al. (Sat,) studied this question.