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Antioxidative Effects of Common and Organic Kale Juices

유기농 및 일반농 케일 착즙액의 항산화 활성

  • Kim, Jong-Dai (Dept. of Food Science and Biotechnology, Kangwon National University) ;
  • Lee, Ok-Hwan (Dept. of Food Science and Biotechnology, Kangwon National University) ;
  • Lee, Jong Seok (Dept. of Food Science and Biotechnology, Kangwon National University) ;
  • Park, Kun-Young (Dept. of Food Science and Nutrition, Pusan National University)
  • 김종대 (강원대학교 식품생명공학과) ;
  • 이옥환 (강원대학교 식품생명공학과) ;
  • 이종석 (강원대학교 식품생명공학과) ;
  • 박건영 (부산대학교 식품영양학과)
  • Received : 2013.12.10
  • Accepted : 2014.04.16
  • Published : 2014.05.31

Abstract

The objective of the present study was to investigate the protective and free radical scavenging effects of conventionally and organically cultivated kale juices against oxidative damage in $LLC-PK_1$ cells. The DPPH, NO, $O_2{^-}$, and ${\cdot}OH$ radical scavenging activities of organically cultivated kale were higher than those of conventionally cultivated kale juice. Oxidative damage induced by AAPH (2,2'-azobis(2-amidinopropane) dihydrochloride), SNP (sodium nitroprusside), pyrogallol, and SIN-1 (3-morpholinosydnonimine) led to loss of cell viability and increased lipid peroxidation in LLC-PK1 cells, whereas treatment with vegetable juices, especially organically cultivated kale juices, significantly increased cell viability and inhibited lipid peroxidation in a dose-dependent manner (P<0.05). These results suggest that organically cultivated kale juices have protective roles against oxidative stress induced by free radicals.

채소즙이란 생채소를 마쇄하여 인체가 영양소를 흡수하기 쉬운 상태로 제조된 즙으로 생채소의 영양 섭취 효율을 높일 수 있는 식품이라 할 수 있다. 본 연구에서는 재배방법에 따라 생산된 유기농 및 일반농 케일을 착즙하여 다양한 실험을 통하여 항산화 활성을 비교하였다. DPPH radical, NO, $O_2{^-}$, ${\cdot}OH$ 라디칼 소거능에서 유기농 케일 착즙액은 일반농케일 착즙액보다 더 우수한 효과를 나타내었다. LLC-PK1 세포를 이용하여 산화적 스트레스 개선효과에서 유기농 케일 착즙액은 일반농 케일 착즙액에서보다 NO, $O_2{^-}$$ONOO^-$에 의해 유발된 산화적 스트레스에 대한 세포 생존율을 증가시키고, 지질과산화물을 억제시켜 유리라디칼에 대한 보호효과를 유의적으로 나타내었다. 위의 결과로 보아 유기농케일 착즙액은 일반농 케일 착즙액보다 산화적 스트레스에 대한 개선효과가 뛰어난 것으로 사료되며 재배방법의 차이에 따라 그 효과도 차이가 있었다.

Keywords

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