Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effect of Plants Extracts on Lipid Peroxidation of Rat Brain Tissue Induced by Reactive Oxygen Species

활성산소에 의해 유도된 흰쥐 뇌조직의 지질산화에 대한 식물체 추출물의 효과

  • Kim, Seok-Joong (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Han, Dae-Seok (Food Resources Utilization Division, Korea Food Research Institute)
  • 김석중 (대구가톨릭대학교 식품공학과) ;
  • 한대석 (한국식품연구원 식품자원이용연구본부)
  • Published : 2005.12.31
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Abstract

Abilities of various edible plants and natural antioxidants to protect brain against oxidative damages were evaluated using brain homogenate of perfused Sprague-Dawley rat. Oxidative damage, expressed as lipid peroxidation (LPO), indicating total quantity of malondialdehyde and 4-hydroxyalkenal, increased from 4.1 to 6.9nmol/mg protein by treatment of $2.5{\mu}M$ ferrous sulfate and 7.5mM hydrogen peroxide as source of reactive oxygen species (ROS) on brain homogenate for 10min at $37^{\circ}C$ Mallow(88%) in leafy vegetables, small potato (93%) in root vegetables, green red pepper (76%) in fruit vegetables, and avocado (96%) in fruits showed highest LPO inhibition capacities. Ability of mushrooms decreased in order of nameko, shiitake, pine mushroom, oyster mushroom, and new type pine mushroom. Among natural antioxidants tested, (+)catechin (91%), (-)epigallocatechin gallate (85%), (-)epicatechin gallate (83%), and kaempferol(83%) showed high LPO inhibition capacities.

Sprague-Dawley 계열의 흰쥐를 perfusion시킨 후 분리한 뇌조직을 이용하여 뇌의 산화적 손상을 억제할 수 있는 식물체 및 항산화제의 활성을 조사하였다. 뇌의 산화적 손상 유도를 위해서는 활성산소원으로 $2.5{\mu}M$ ferrous sulfate와 7.5mM hydrogen peroxide를 뇌조직 homogenate에 첨가하였으며 손상의 정도는 malondialdehyde와 4-hydroxyalkenal 총 함량으로 표현되는 지질 과산화도(LPO)를 이용하였다. $37^{\circ}C$에서 10분간의 처리 시 LPO는 4.1에서 6.9nmol/mg protein 증가하였다. 한편, 식물체들의 뇌 손상 억제 효과를 분석하기 위해, 68종의 식용식물체로부터 수용성 추출물을 조제한 후 이를 활성산소 처리 전에 뇌 조직 homogenate에 첨가함으로써 지질산화 억제 정도를 비교하였다. 그 결과 엽채류에서는 아욱, 열무잎, 비름, 무순, 셀러리 등이, 근채류에서는 조림감자, 생강, 고구마 등이 80% 이상의 LPO억제 효과를 나타냈다. 과채류와 과일에서는 풋고추, 꽈리고추, 쥬니키, 가지, 아보카도, 오렌지, 바나나 등이 60% 이상의 효과를 보였으며, 버섯류에서는 팽이버섯, 양송이버섯, 표고버섯, 새송이버섯, 느타리버섯 순으로 효과가 높게 나타났다. 한편, 32종의 항산화제 중에서는 (+)catechin(91%), (-)epigallocatechin gallate(85%), (-)epicatechin gallate(83%), kaempferol(83%), chlorogenic acid(78%), melatonin(75%), ${\alpha}-tocopherol(69%)$ 등이 산화적 뇌 손상 방어에 우수한 것으로 나타났다.

Keywords

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