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Antioxidant and Lipid Peroxidation Inhibition Effects of Catechin Compounds Isolated from Ethyl Acetate Fraction of Grape Seed Ethanol Extract

포도종자 에텔아세테이트 분획물로부터 분리한 카테킨 화합물의 항산화 및 지질과산화 억제효과

  • Kim, Nan-Young (School of Biotechnology and Bioengineering, Kangwon National University) ;
  • Park, Sung-Jin (School of Biotechnology and Bioengineering, Kangwon National University) ;
  • Oh, Deog-Hwan (School of Biotechnology and Bioengineering, Kangwon National University)
  • 김난영 (강원대학교 바이오산업공학부) ;
  • 박성진 (강원대학교 바이오산업공학부) ;
  • 오덕환 (강원대학교 바이오산업공학부)
  • Published : 2005.12.01

Abstract

This study evaluated the isolation and identification of biologically active compounds from the ethyl acetate fraction of grape seed extract (Campbell early). Ethyl acetate fraction was further purified with sephadex LP-20 column chromatography. Each biologically active compound for free radical scavenging effect and lipid peroxidation inhibition was isolated and identified with ${1}^H$ and${12}^C$-NMR. Major compounds were identified as (+)-catechin and (-)-epicatechin respectively. The amounts of (+)-catechin and (-)-epicatechin in grape seed were 45.7$\%$ and 35.1$\%$, respectively. The purified (+)-catechin and (-)-epicatechin showed more strong free radical scavenging effects ($RC_{50}$= 11.1 $\mu$g/mL and 10.4 $\mu$g/mL) than ethyl acetate fraction ($RC_{50}$= 15.4 $\mu$g/mL). However, ethyl acetate fraction showed much stronger lipid oxidative inhibition effect than the purified (+)-catechin and (-)-epicatechin.

본 연구는 캠벨종 포도 종자 ethyl acetate 분획물로 부터 생리활성 물질을 분리$\cdot$동정하고 분리물질의 생리활성을 검토하기 위하여 수행되었다. 캠벨종 종자 ethyl acetate분획물로부터 sephadex LP-20 column chromatography를 이용하여 활성물질을 단리하고 ${1}^H$${13}^C$) NMR 분석을 통하여 (+)-catechin과 (-)-epicatechin을 동정하였다. HPLC를 이용하여 정량 분석한 결과, (+)-catechin은 45.7$\%$의, (-)-epicatechin은 $35.1\%$의 함량을 나타내었으며 이들 화합물이 포도종자 중의 주요한 생리 활성물질로 사료된다. 이들 화합물의 단독 또는 병용 처리 시 항산화 활성, 지질과산화 억제효과 및 자외선 차단 효과를 살펴본 결과, DPPH free radical 소거 활성에서는 (+)-catechin과 (-)-epicatechin 모두가 $RC_{50}$= 11.1 ${\mu}g/mL$$RC_{50}$= 10.4 ${\mu}g/mL$으로 높은 free radical 소거 활성을 나타내었으나, 지질 과산화 억제는 (+)-catechin이 나 (-)-epicatechin 단독처리보다는 ethyl acetate 분획물에서 훨씬 효과가 좋은 것으로 나타났다.

Keywords

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