Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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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
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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.

본 연구에서는 마를 건조 후 분말화하여 실험에 사용하였으며, 건조 마 분말에 대한 생리활성에 대한 연구로 건조된 마를 유기용매로 추출하여 마 추출물과 분획물들의 $H_2O_2$에 의해 유도된 산화적 스트레스 및 인체 암세포(HT1080 인체 섬유육종세포, HT-29 인체 결장암세포)에 대한 증식 억제 효과에 대해 검토하고자 하였다. 마는 항비만, 항변비, 항돌연변이, 혈당 및 혈중 콜레스테롤 감소 등의 활성이 있어 건강식품으로 알려져 있다. $H_2O_2$에 의해 유도된 산화적 스트레스 저해효과를 알아보기 위하여 DCFH-DA assay를 행하였다. 건조 마 A+M 추출물을 농도별로 인체 섬유육종세포(HT1080)에 처리하였을 때 농도 의존적으로 세포 내 활성산소종을 크게 억제시켰다. 각 분획물들 중 85% aq. MeOH 분획물은 다른 분획물과 비교하여 높은 지질 과산화물 생성 억제 효과를 보였다. 인체 암세포에 대한 증식 억제 실험에서 A+M 및 MeOH 추출물은 농도 의존적으로 인체 섬유육종 및 결장암세포의 증식을 억제하였다. 마 추출물로부터 얻어진 n-hexane, 85% aq. MeOH 및 n-butanol (n-BuOH) 분획물들은 첨가농도 0.5 mg/ml 이상 처리했을 때 이들 두 암세포의 증식을 유의적으로 억제하였다(p<0.05). 본 연구 결과로 부터 건조 마의 암세포 증식 억제 효과는 마의 A+M 추출물이 MeOH 추출물에 비해 높았고, 분획물들의 경우에는 water 분획물을 제외한 분획물들의 암세포 억제 효과가 높았다. 특히 85% aq. MeOH 분획물은 인체 암세포 증식 억제 효과뿐만 아니라 세포 내 활성산소종 감소시키는 효과가 높아 이들 분획물에 활성물질이 있을 것으로 추정된다.

Keywords

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