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The in vitro anti-inflammatory and skin moisturizing activities of Pilea martini (Levl.) Hand.-Mazz. were investigated on lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages and human immortalized keratinocytes. Chromatographic analysis was performed to identify the chemical composition of the extracts. Pilea martini extracts significantly suppressed LPS-induced nitric oxide, prostaglandin E 2 , interleukin 6, and tumor necrosis factor α production in dose-dependent manners. In addition, the extracts inhibited LPS-induced inducible nitric oxide synthase and cyclooxygenase-2 proteins and their mRNA expression through causing a downregulation of nuclear factor-κB, activator protein 1, and mitogen-activated protein kinase signaling cascades. The extracts increased the production of hyaluronic acid levels and enhanced the expression levels of both filaggrin and serine palmitoyltransferase regulation. Liquid chromatography-mass spectroscopy analysis showed that the extracts contained 6 different compounds (malic acid, tryptophan, chlorogenic acid, caffeic acid, p-coumaric acid, and isoquercetin) that may contribute to their bioactivities. Taken together, Pilea martini extract showed remarkable promise as an anti-inflammatory and moisturizing agent.

In Vitro Anti-Inflammatory and Skin Moisturizing Propertiesof Pilea martini(Levl.) Hand.-Mazz. Extracts