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자료유형
학술저널
저자정보
최안나 (전주대학교 의과학대학) 이현서 (전주대학교 의과학대학) 김장호 (전주대학교 의과학대학) 조병옥 (전주대학교 의과학대학) 신재영 (전주대학교 의과학대학) 정승일 ([재]전주농생명소재연구원) 장선일 (전주대학교 의과학대학)
저널정보
대한본초학회 대한본초학회지(본초분과학회지) 대한본초학회지 제32권 제3호
발행연도
2017.1
수록면
71 - 78 (8page)

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Objectives : The various grape extracts derived from grape pulp, seed and skin, containing various types of polyphenols and flavonoids, have been known to have anti-inflammatory, antioxidant and improve cardiovascular condition as well as sun's damaging effects. However, there have been rare reports of various beneficial effects of grape fruit stem extract (GFSE), one of the waste products of grapes. We investigated anti-inflammatory and melanogenesis inhibitory effects of GFSE. Methods : One-hundred gram of grape fruit stem was extracted with 80% ethanol at room temperature for 3 days. After filtration, the ethanol was removed using vacuum evaporator, then lyophilized to obtain the dry extract which was stored at $-20^{\circ}C$ until used. NO levels were measured by using Greiss reagent. Prostaglandin $E_2$ ($PGE_2$) production was measured by ELISA assay. The expression levels of iNOS, COX-2, TRP-1 and TRP-2 were evaluated by western blot analysis. Results : GFSE reduced the level of nitric oxide and prostaglandin $E_2$ ($PGE_2$) production in a dose-dependent manner, compared to control. Expressions of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) protein were also effectively inhibited by the GFSE. In a tyrosinase inhibitory activity, GFSE significantly reduced the tyrosinase activity and melanin content in a dose dependent manner, compared to control. GFSE also decreased the expression of tyrosinase related protein-1 (TRP-1) and tyrosinase related protein-2 (TRP-2), known as a melanocyte-specific gene product involved in melanin synthesis. Conclusions : Therefore, these results indicated that GFSE had powerful anti-inflammatory and anti-melanogenic effects.

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