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Topical application of quercetin improves wound healing in pressure ulcer lesions.
Experimental Dermatology 2018 July
The ischaemia-reperfusion (I/R)-induced skin lesion has been identified as primary cause of pressure ulcers. To date, attempts to prevent pressure ulcers have not produced a significant improvement. Quercetin, one of the most widely distributed flavonoids in fruits and vegetables, exhibits its antioxidant and anti-inflammatory properties against many diseases, including ischaemic heart disease, atherosclerosis and renal injury. In vitro wound scratch assay was first used to assess the function of quercetin in wounding cell model. Next, animal pressure ulcers model was established with two cycles of I/R. The impact of quercetin in the wound recovery, immune cell infiltration and pro-inflammatory cytokines production was investigated in this model. Mechanistic regulation of quercetin at the wound site was also studied. Quercetin accelerated wound closure in cell scratch assay. Dose-response study suggested 1 μmol/L quercetin for in vivo study. In I/R injury model, quercetin treatment significantly accelerated wound closure, reduced immune cell infiltration and pro-inflammatory cytokines production. Signalling study showed quercetin treatment inhibited MAPK but not NFĸB activation. Quercetin treatment improved the wound healing process in I/R lesions by suppressing MAPK pathway. Our results supported that quercetin could be a potential therapeutic agent for pressure ulcers.
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