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백경연(Kyung-Yean Beik),이상일(Sang-Il Lee),김정숙(Jeong-Sook Kim),이도영(Doo-Young Lee),오승희(Seoung-Hee Oh),김순동(Soon-Dong Kim) 동아시아식생활학회 2009 동아시아식생활학회지 Vol.19 No.2
The antioxidative activities of two varieties of egg plant (Chunyang No 2: Dangaji, Jinju Janggaji: Janggaji) extracts were investigated. The total polyphenol contents of Dangaji peel hot water extract and the Janggaji flesh and fruit hot water extracts were higher than those of the other samples. However, the DPPH radical scavenging activities(electron donating activity) of Dangaji flesh-ethanol, peel-cold water, and fruit- ethanol extracts, as well as the Janggaji peel cold water extract, were higher than those of the other samples. Furthermore, the in vitro inhibitory effects of the Dangaji peel cold water and hot water extracts on rat hepatic xanthine oxidase were highest among the samples, and were exhibited in a dose dependant manners. Although there were marked changes in the xanthine oxidase Km values for xanthine as a substrate, the Vmax value changes by the addition of the Dangaji water extracts were minor compared with the control. This result suggests that Dangaji water extracts may regulate the activity of xanthine oxidase-via the inhibition of binding affinity between the enzyme and substrate. The present study provides experimental evidence that constituents of egg plant extracts may ameliorate reactive oxygen species(ROS)-induced oxidative stress via hepatic hepatic xanthine oxidase activity, but further studies to identify the active antioxidants and compounds and inhibitors of xanthine oxidase are required.
오미자(Schizandra chinensis) 종자 추출물의 항산화 효과에 관한 연구
최현숙 ( Hyun Sook Choi ),백경연 ( Kyung Yean Beik ),김종봉 ( Jong Bong Kim ) 한국미용학회 2012 한국미용학회지 Vol.18 No.4
This study was to analyze the effects of seed extract of Schizandra chinensis on the skin anti-oxidant and anti-aging, and evaluate whether seed extract of Schizandra chinensis can be developed as an anti-oxidizing or anti-aging agent for improving the skin condition. Seed extract was prepared by using water or ethanol as a solvent and was used for analyzing the contents of polyphenol, electron donating activity, reducing power and SOD(superoxide dismutase)-like activity. The total contents of polyphenol was higher in the seed extract by ethanol than the extract by water. Seed extract by ethanol contained higher electron donating activity compared to the extract with water. Electron donating activity was increased proportionally and significantly as the concentration of the tested extract was increased (p<0.05). The reducing power and the superoxide dismutase(SOD)-like activity of seed extract was significantly increased as increasing concentrations of the extract were analyzed (p<0.05). Dry seed extract in the group of water extracts has the highest activity for both reducing power and SOD-like activity, while dry seed extract and fermented seed extract showed higher activities compared to roasted seed extract in the group of ethanol extracts. Taken together, it was found that seed extract of Schizandra chinensis contain the anti-oxidizing activities and seems to be effective for skin care as an anti-oxidant. The Schizandra chinensis seed is a by-product obtained after consuming the fruit flesh of Schizandra chinensis and might be usefully applied to improve the skin conditions as an antioxidant functional cosmetics for whitening, preventing wrinkles, or removing skin troubles, such as pimples.