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Effects of Extracts from Dried Yam on Antioxidant and Growth of Human Cancer Cell Lines

건조 마 추출물의 항산화 및 인체 암세포 증식 억제 효과

  • Jang, Joo-Ri (Division of Marine Environment & Bioscience, Korea Maritime University) ;
  • Hwang, Seong-Yeon (Division of Marine Environment & Bioscience, Korea Maritime University) ;
  • Lim, Sun-Young (Division of Marine Environment & Bioscience, Korea Maritime University)
  • 장주리 (한국해양대학교 해양환경생명과학부) ;
  • 황성연 (한국해양대학교 해양환경생명과학부) ;
  • 임선영 (한국해양대학교 해양환경생명과학부)
  • Received : 2010.06.28
  • Accepted : 2010.08.27
  • Published : 2010.09.30

Abstract

We investigated the inhibitory effects of solvent extracts from dried yam on $H_2O_2$-induced oxidative stress and growth of cancer cell lines (HT1080 human fibrosarcoma and HT-29 human colon cancer cells). Yam (Dioscoreacea) has been recognized as a healthy food due to its various biological activities, such as anti-obesity, anti-constipation, anti-proliferation, and anti-mutagenic activities, as well as its ability to decrease blood glucose and cholesterol levels. In order to determine the protective effect on $H_2O_2$-induced oxidative stress, DCFH-DA (dichlorodihydrofluorescin diacetate) assay was conducted. Acetone with methylene chloride (A+M) extract of dried yam appeared to reduce the levels of intracellular reactive oxygen species (ROS) with dose responses. Among the fractions, 85% aq. methanol fraction showed the highest protective effect on production of lipid peroxides. Inhibitory effects of A+M and methanol (MeOH) extracts on the growth of HT1080 and HT-29 cancer cells increased in a dose dependent manner. The treatments of n-hexane, 85% aq. methanol and n-butanol fractions (${\geqq}0.5$ mg/ml concentrations) significantly inhibited the growth of both cancer cells (p<0.05). From these results, 85% aq. methanol fraction showed inhibitory effects on cellular oxidation and growth of human cancer cells, suggesting that this fraction may contain active compounds of dried yam.

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