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KMID : 0604520180440010067
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Journal of the Society of Cosmetic Scientists of Korea
2018 Volume.44 No. 1 p.67 ~ p.72
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Green Tea Root Is a Potential Natural Surfactant and Is Protective against the Detrimental Stimulant PM2.5 in Human Normal Epidermal Keratinocytes
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Na Hye-Won
Lee Yeong-Ran
Park Jun-Seong
Lee Tae-Ryong
Kim Hyoung-June
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Abstract
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Green tea (Camellia sinensis L.) has been widely explored for its medicinal applications. However, most of the studies had targeted the green tea leaf, while other parts remained unexplored. In this study, protective effect of green tea root extract on Normal Human Epidermal Keratinocytes (NHEKs) against the damage induced by an external stimulant (PM2.5) was confirmed. Thirty-year-old green tea root samples were collected from Amorepacific’s Dolsongi tea field and green tea root extract was prepared with 70% ethanol. Total crude saponin content in green tea root extract was 54%, which is much higher than that in ginseng extract. Our results suggest that green tea root extract can be used as a natural surfactant in cosmetics. For evaluating its protective effect against the damage induced by PM2.5, IL-36G was used as a biomarker. IL-36G mRNA expression level increased remarkable upon PM2.5 treatment in NHEKs. Moreover, IL-36G was recently reported to be expressed in psoriasis lesions. Results showed significant decrease of IL-36G expression by treatment of green tea root extract. In conclusion, thirty-year-old green tea root extract can be used as a natural surfactant with a high saponin content and may have protective effect against the damage induced by PM2.5.
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KEYWORD
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green tea root, natural surfactant, PM2.5, skin care
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