The anti-inflammatory and antioxidant properties of 1,2-decanediol and willow bark extract in lipopolysaccharide-stimulated keratinocytes

BACKGROUND: 1,2-Decanediol (S-Mal) is an organic compound belonging to the 1.2-alkanediol family, with two hydroxyl groups located on the first and second carbon of the alkane chain. probably responsible for the enhanced anti-bacterial efficacy. The willow bark total extract (W-Mal) has been used since thousands of years as an herbal remedy for its antipyretic, analgesic, anti-inflammatory and anti-microbial activities. S-Mal is used in cosmetic preparations. whether W-Mal can be topically or systemically administered. Aim of our study was to evaluate in vitro the anti-inflammatory and antioxidant properties of S-Mal and W-Mal. singularly or in combination, in LPS-stimulated keratinocytes. METHODS: The possible toxic effect of S-Mal and W-Mal was assessed through analysis of cell viability 24 hours after treatment. The antiinflammatory and antioxidant activities were evaluated by measuring IL-8, TNF-alpha and IL-1 beta production as well as cellular antioxidants (GSH and NADPH) consumption. 24 and 48 hours, respectively, after LPS stimulation. RESULTS: Both substances resulted able to: 1) increase cell viability (P<0.05); 2) decrease the release of inflammatory mediators (IL-8, TNF-alpha and IL-1 beta (P<0.05 - P<0.001); and 3) limit the depletion of cellular antioxidants (GSH and NADPH) (P<0.001). CONCLUSIONS: S-Mal and W-Mal have shown a potential cytoprotective activity when used together, and good anti-inflammatory and antioxidant effects when used either singularly or in combination. In light of our results, S-Mal and W-Mal could represent effective and safe options in the management of bacterial-induced or aggravated skin conditions.