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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Protective Effect of 3,5-Dicaffeoylquinic Acid Isolated from Ligularia fischeri against Oxidative Damage in HepG2 Cells

HepG2 세포에서 산화적 손상에 대한 곰취 유래 3,5-Dicaffeoylquinic Acid의 보호 효과

  • Park, Sun-Young (Animal Products and Food Science Program, College of Animal Life Sciences, Kangwon National University) ;
  • Kim, Gur-Yoo (Animal Products and Food Science Program, College of Animal Life Sciences, Kangwon National University) ;
  • Jhoo, Jin-Woo (Animal Products and Food Science Program, College of Animal Life Sciences, Kangwon National University)
  • 박선영 (강원대학교 동물생명과학대학 축산식품과학전공) ;
  • 김거유 (강원대학교 동물생명과학대학 축산식품과학전공) ;
  • 주진우 (강원대학교 동물생명과학대학 축산식품과학전공)
  • Received : 2017.07.06
  • Accepted : 2017.09.23
  • Published : 2017.11.30
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Abstract

This study was conducted to investigate the hepatoprotective effects of 3,5-dicaffeoylquinic acid (3,5-DCQA) isolated from Ligularia fischeri against hydrogen peroxide-induced oxidative stress in HepG2 cells. Antioxidative effects of 3,5-DCQA were determined by measuring antioxidant enzyme [superoxide dismutase (SOD), catalase (CAT) glutathione peroxidase (GPx)] expression levels against hydrogen peroxide-induced oxidative stress using real-time PCR analysis. 3,5-DCQA treatment significantly increased gene expression levels of SOD, CAT, and GPx in a dose-dependent manner ($10{\sim}30{\mu}g/mL$) in HepG2 cells. Hepatoprotective effects were analyzed by measuring glutamic oxaloacetic transaminase (GOT), lactate dehydrogenase (LDH), and gamma-glutamyl transferase (GGT) activities using a biochemistry analyzer in hydrogen peroxide-treated HepG2 cells. 3,5-DCQA treatment significantly reduced GOT, LDH, and GGT activities in a dose-dependent manner ($10{\sim}30{\mu}g/mL$) against increased liver function index enzyme activities induced by hydrogen peroxide oxidative stress in HepG2 cells. The results reveal that 3,5-DCQA compound isolated from Ligularia fischeri can be useful for the development of an effective hepatoprotective agent.

본 연구는 곰취에서 분리한 3,5-dicaffeoylquinic acid(3,5-DCQA)의 간세포에 대한 보호기능을 평가하기 위해 HepG2 세포를 이용하여 hydrogen peroxide에 의해 유도된 산화적 스트레스에 대한 항산화 효소 유전자 발현량 및 간 기능 지표 효소(LDH, GGT, GOT) 활성에 미치는 영향을 분석하였다. 산화적 스트레스가 유도된 HepG2 세포에 3,5-DCQA를 10, 20 및 $30{\mu}g/mL$ 농도별로 처리한 후 real-time PCR을 이용하여 주요 항산화 효소들의 유전자 발현량을 측정한 결과, hydrogen peroxide 처리에 의해 감소한 SOD-1, SOD-2, CAT 및 GPx의 mRNA 발현량이 농도 의존적으로 증가하는 것을 확인할 수 있었다. 또한, HepG2 세포에서 hydrogen peroxide 처리에 의해 증가한 주요 간기능 지표 효소인 LDH, GGT 및 GOT 활성이 3,5-DCQA(10, 20, $30{\mu}g/mL$) 처리에 의해 유의적으로 감소하는 것으로 나타났다. 이와 같은 실험 결과로부터 곰취에서 분리한 페놀화합물인 3,5-DCQA는 HepG2 세포에서 산화적 스트레스에 대한 우수한 항산화 효과 및 간세포 보호 효과를 나타내는 것을 확인할 수 있었으며, 향후 관련 기능성 식품개발에 필요한 기초적인 자료로 활용될 수 있을 것으로 기대된다. 또한, 동물실험을 통한 3,5-DCQA의 추가적인 기능성 검증이 필요하다고 판단된다.

Keywords

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