Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Hepatoprotective Effect of Curdrania tricuspidata Extracts against Oxidative Damage

산화적 손상에 대한 꾸지뽕나무 잎, 열매 및 줄기 추출물의 간세포 보호효과

  • Received : 2011.10.14
  • Accepted : 2011.11.21
  • Published : 2012.01.31
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Abstract

We investigated the antioxidant and hepatoprotective effects of extracts from the leaves, stems, and fruit of Cudrania tricuspidata (CT) against $H_2O_2$ or ethanol-induced oxidative damage. The total polyphenol and flavonoid content was the highest in the 80% ethanol extracts from the leaves of the plant (CTL80). Also, the radical scavenging activity of DPPH and ABTS in the CTL80 was significantly higher than that of the non-treated control. To determine the hepatoprotective effects of CT in $H_2O_2$ and ethanol-induced oxidative damage, cell viability was measured using an XTT assay. Pre-treatment of CTL80 significantly increased cell viability compared with the non-treated control cells by 71.21% and 80.40%, respectively. The data suggests that CTL80 exhibits hepatoprotective antioxidant effects. Therefore, CTL80 may be considered a potential agent to control $H_2O_2$ or ethanol-induced liver damage.

본 연구에서는 산화적 스트레스에 의한 간 손상 개선 소재 개발을 위하여 꾸지뽕나무 각 부위별(잎, 줄기, 열매), 용매별(80% 에탄올, 10% 에탄올, 물) 추출물의 항산화 활성 및 간세포 보호효과를 측정하였다. 총 폴리페놀 함량과 플라보노이드 함량은 꾸지뽕 잎 80% 에탄올 추출물에서 가장 높게 나타났으며, 부위별로는 잎>줄기>열매 순이었고, 추출용매별로는 80% 에탄올>10% 에탄올>물 추출물 순으로 나타났다. DPPH 라디칼 소거능과 ABTS 라디칼 소거능 또한 잎80% 에탄올 추출물이 가장 높았으며, HepG2 세포에서 $H_2O_2$로 유도된 산화적 손상에 대해서는 꾸지뽕 잎 80% 에탄올 추출물만 유의적으로 높은 세포보호활성을 나타내었으며, HepG2/2E1 세포에서 알코올로 유도된 산화적 손상에 대한 각 부위별, 용매별 추출물의 간세포보호효과 또한 꾸지뽕잎 80% 에탄올 추출물이 가장 높게 나타났다. 부위별로는 잎>줄기>열매 순이었고, 추출 용매별로는 꾸지뽕 잎의 경우 80% 에탄올>10% 에탄올>물 순이었으며, 줄기와 열매의 경우는 용매별로 유의적인 차이가 나타나지 않았다. 이상의 결과로부터 꾸지뽕나무 잎 추출물은 우수한 항산화활성을 가질 뿐만 아니라 $H_2O_2$와 알코올로 유도된 간 손상으로부터 간세포 보호활성을 보임을 확인하였다. 이에 꾸지뽕나무 잎 추출물은 산화적 스트레스에 의한 간 손상으로부터 간세포 보호효과를 갖는 기능성 소재로 활용될 수 있을 것으로 사료된다.

Keywords

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