The Korea Journal of Herbology (대한본초학회지)

The Korea Association of Herbology (대한본초학회)
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Antioxidant Activities and Inhibitory Effect on Oxidative DNA Damage of Nelumbinis Semen Extracts

연자육 추출물의 항산화 및 산화적 DNA 손상억제 활성

  • 박재호 (중원대학교 한방산업학부) ;
  • 이병구 (영남대학교 식품외식학부) ;
  • 변광인 (영남대학교 식품외식학부) ;
  • 김도완 (중원대학교 한방산업학부)
  • Received : 2010.11.04
  • Accepted : 2010.12.15
  • Published : 2010.12.30
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Abstract

Objective : This study was conducted to investigate the antioxidant activity and inhibitory effect on oxidative DNA damage of Nelumbinis Semen Extracts Methods : Nelumbins semen were extracted with hot-water and ethylacetate (EtOAC). The 1,1-diphenyl-2-picrylhydrazyl (DPPH) and hydroxyl radical scavenging assay and $Fe^{2+}$ chelating assay were performed for antioxidative effect and ${\phi}X$-174 RF I DNA cleavage assay and intracellular DNA damage assay were used for inhibitory effect on intracellular DNA damage. Results : In DPPH, Hydroxyl radical scavenging activity and $Fe^{2+}$ chelating activity of EtOAC extracts were 96.22%, 53.53%, 64.72%, while those of hot-water extracts were 20.86%, 10.72%, 29.74% at $200{\mu}g/m{\ell}$, respectively. In ${\phi}X$-174 RF I plasmid DNA cleavage assay, the protective effects of EtOAC and hot-water extracts against oxidative DNA damage were 76% and 6% at $200{\mu}g/m{\ell}$, respectively. Conclusion : These results indicated that the seed extracts of Nelumbo nucifera can be used as a natural antioxidants, which effectively inhibits the oxidative DNA damage.

본 연구에서는 연자육의 항산화 활성을 평가하기 위해 EtOAC 분획물과 열수 추출물을 이용하여 DPPH, Hydroxyl 라디칼 소거활성과 $Fe^{2+}$ 킬레이팅 활성을 측정하였다. 또한 산화적 DNA 손상억제 효과는 ${\phi}X$-174 RF I plasmid DNA cleavage assay를 통해 평가하였다. EtOAC 분획물은 $200{\mu}g/m{\ell}$에서 DPPH, Hydroxyl 라디칼 소거활성과 $Fe^{2+}$ 킬레이팅 활성이 각각 96.54%, 55.27%, 66.17%의 활성이 나타났으며, 열추 추출물에서는 각각 21.25%, 15.72%, 30.52%로 열수 추출물에 비해 EtOAC 분획물의 항산화 활성이 높은 것으로 나타났다. 또한 ${\phi}X$-174 RF I plasmid DNA cleavage assay에서 EtOAC 추출물은 $200{\mu}g/m{\ell}$에서 76%의 높은 억제 효과가 나타난 반면, 열수 추출물은 6%의 낮은 DNA 산화적 손상억제 효과를 나타내었다. 각 추출물의 총 페놀 함량을 조사한 결과 열수 추출물에 비해 EtOAC 분획물이 높은 것으로 나타났다. 항산화 활성과 DNA 산화적 손상억제 효과가 높은 EtOAC 분획물을 GC/MS에 의해 분석한 결과, Benzeneethanol, 3-methyl-Benzoic acid, 4-ethyl-Phenol, 2,4-bis(1,1-dimethylethyl)Phenol 등 페놀성 화합물이 다수 동정되었다. 본 연구결과에 의해 연자육은 항산화 및 암 예방적 소재로써의 새로운 기능성 식품소재로서 충분한 가능성이 있다고 판단된다.

Keywords

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