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http://dx.doi.org/10.5352/JLS.2007.17.12.1723

Effect of Antioxidant Activity and Induction of DNA Damage on Human Gastric Cancer Cell by Rubus coreanus Miquel  

Jeon, Sang-Kyung (Dept. of Food Science and Technology, Keimyung University)
Lee, Ji-Won (Dept. of Food Science and Technology, Keimyung University)
Lee, In-Seon (The Center for Traditional Microorganism Resources Center, Keimyung University)
Publication Information
Journal of Life Science / v.17, no.12, 2007 , pp. 1723-1728 More about this Journal
Abstract
Rubus coreanus Miquel (RCM), a type of red raspberry, grows wild in Korea and China and its unripe fruit is used as a folk medicine for the treatment of impotence and as a diuretic. RCM was extracted with methanol and then further fractionated it into for different types. In this study, we investigated the antioxidant activity of a RCM extract (ext.) and its fraction (fr.). DPPH free radical scavenging activity assay, total polyphenols contents, total flavonoids contents assay were used to analyze antioxidant activity. The DPPH free radical scavenging activity $(RC_{50}:1.67{\mu}g/ml)$ and total polyphenols contents $(546.25{\mu}g/mg)$ were higher in butanol fraction than in other fr. And total flavonoids contents was higher in ethylacetate fr. $(141.78{\mu}g/mg)$. We applied comet assay to measure the DNA damage in the individual cells and exposed time course at $IC_{50}$. Comet assay is a rapid and sensitive fluorescent microscopic method to examine DNA damage and repair at individual cell level. The butanol fro from RCM significantly induced 54.12%, 57.95% of DNA damage after treated RCM for 8 hr. In conclus
Keywords
Rubus coreanus Miquel; comet assay; antioxidant activity; DNA damage; gastric cancer cells;
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