Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effect of Antioxidant Activity and Induction of DNA Damage on Human Gastric Cancer Cell by Rubus coreanus Miquel

복분자 추출물의 항산화활성 및 인간 위암 세포주에 대한 유전적 손상 유도

  • 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)
  • 전상경 (계명대학교 식품가공학과) ;
  • 이지원 (계명대학교 식품가공학과) ;
  • 이인선 (계명대학교 전통 미생물자원 개발 및 산업화 연구센터)
  • Published : 2007.12.30
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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

본 연구에서는 다양한 기능성을 가지는 복분자를 80% methanol로 추출한 후 분획물들을 제조하여 항산화 효과 및 인간 유래 위암세포인 AGS와 KatoIII을 이용하여 성장 저해 효과와 DNA손상을 측정하였다. 항산화 효과를 측정해 보기 위하여 총 폴리페놀 함량과 플라보노이드 함량, DPPH free radical의 소거활성을 측정하였는데, 먼저 폴리페놀의 경우 butanol fr., ethylacetate fr., water fr.순으로 나타났고 특히 butanol fr.의 경우 $546.25{\mu}g/mg$의 매우 높은 폴리페놀 함량을 확인 할 수 있었다. 플라보노이드의 함량 결과 ethylacetate fr., butanol fr., water fr.,순으로 나타났으며 ethylacetate fr.의 경우 $141.78{\mu}g/mg$의 높은 플라보노이드 함량을 확인할 수 있었다. DPPH free radical의 소거활성에서는 폴리페놀 함량의 순서와 같은 효과를 보였으며, 합성 항산화제인 BHA의 $RC_{50}$값 $3{\mu}g/ml$보다 water fr.을 제외하고 더 좋은 소거능을 확인 할 수 있었다. 인간 유래 위암세포주의 성장 저해 효과를 살펴본 결과 AGS와 KatoIII 세포주 모두 butanol fr.에서 가장 좋은 저해능을 나타내었고, butanol fr., ethylacetate fr., water fr. 순서로 저해효과를 나타내었다. DNA손상을 측정한 결과 역시 이와 같은 순으로 나타났으며, butanol fr.에서 1시간 이내에 약 50%정도의 손상유도 효과를 보였다. 이상의 결과에서 복분자 methanol추출물과 각각의 분획물은 항산화 효과 및 위암 세포주에 대한 성장 저해 활성 및 높은 DNA손상 유도 효과를 갖고 있음을 알 수 있었다.

Keywords

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