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KMID : 0604520160420010087
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Journal of the Society of Cosmetic Scientists of Korea
2016 Volume.42 No. 1 p.87 ~ p.94
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Protective Effects of Pyrus pyrifolia NAKAI Leaf Extracts on UVB-induced Toxicity in Human Dermal Fibroblasts
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Koh A-Ra
Choi Song-Ie
Kim Yong-Ung
Park Gun-Hyuk
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Abstract
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Skin damage is mainly caused by environmental factors such as ultraviolet light, heat, and smoking. It is known that reactive oxygen species production is commonly involved in the pathogenesis of skin damage induced by these factors, causing skin aging. Pyrus pyrifolia Nakai continues to be a popular and highly consumed fruit in many countries with known beneficial effects including antitumor, antioxidative, and anti-inflammatory effects. However, there is no evidence of a therapeutic effect of Pyrus pyrifolia extract (PPE) against skin aging via inhibition of mitochondria-mediated apoptosis. In this study, we investigated PPE protective effect against photoaging induced by UVB (50 mJ/cm2) in HS68 human dermal fibroblasts. Lactate dehydrogenase assay showed that PPE significantly protected HS68 cells against UVB-induced damage in a dose-dependent manner. Other assays using DCF-DA demonstrated that PPE protected HS68 cells by regulating reactive oxygen species production. PPE also regulatedmitochondrial dysfunction and mitochondrial membrane potential induced by UVB, and inhibited UVB-induced caspase-3 activity. These results indicate that PPE protects human dermal fibroblasts from UVB-induced damage by regulating the oxidative defense system.
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KEYWORD
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Pyrus pyrifolia leaf, dermal fibroblasts cell, antioxidant, mitochondria, antiapoptosis
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