Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Antioxidant and pancreatic lipase inhibitory activities of Anemarrhena asphodeloides

지모 추출물의 항산화 및 pancreatic lipase 저해 활성 평가

  • Kwon, O Jun (Daegyeong Institute For Regional Program Evaluation) ;
  • Lee, Ha Yeong (Department of Herbal Medicinal Pharmacology, Daegu Haany University) ;
  • Kim, Tae Hoon (Department of Herbal Medicinal Pharmacology, Daegu Haany University) ;
  • Kim, Se Gie (Department of Pharmaceutical Science and Technology, Catholic University of Deagu)
  • 권오준 (대경지역평가단) ;
  • 이하영 (대구한의대학교 한약재약리학과) ;
  • 김태훈 (대구한의대학교 한약재약리학과) ;
  • 김세기 (대구가톨릭대학교 제약산업공학과)
  • Received : 2014.02.27
  • Accepted : 2014.05.16
  • Published : 2014.06.30
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Abstract

In this study, the antioxidant and pancreatic lipase inhibitory activities of aqueous methanolic (70% methanol) extract from the roots of Anemarrhena asphodeloides were investigated. The extracts of four solvent fractions (the n-hexane layer, EtOAc layer, n-BuOH layer, and $H_2O$ layer) of the 70% methanol extract were also investigated. Furthermore, the total phenolic content was quantified using a spectrophotometric method. All the tested samples showed dose-dependent radical scavenging and pancreatic lipase inhibitory activities. In particular, the pancreatic lipase inhibitory activity of the ethyl acetate soluble portion (the EtOAc layer) from the rhizomes of the A. asphodeloides was higher than that of the other solvent-soluble portions. The antioxidant property of the extracts was evaluated using radical scavenging assays with DPPH and $ABTS^+$ radicals. 1000 mg/ml of the n-BuOH layer extract showed 91.2% DPPH radical scavenging activity. The EtOAc layer extract and the n-BuOH layer extract showed $IC_{50}=20.5{\pm}1.7mg/ml$ and $IC_{50}=50.5{\pm}0.7mg/ml$ $ABTS^+$ radical scavenging activities, respectively. The anti-obesity efficacy of the A. asphodeloides extract was tested via porcine pancreatic lipase assay. A pancreatic lipase inhibitory activity ($IC_{50}$) of $31.3{\pm}0.1mg/ml$ was obtained from the EtOAc layer extract. These results suggest that A. asphodeloides can be considered a new potential source of natural antioxidant and anti-obesity agents.

지모를 70% methanol로 침지 추출하여 얻어진 추출물에 대해 n-hexane, EtOAc 및 n-BuOH로 순차 용매 분획하였고, 얻어진 결과물에 대하여 DPPH 및 $ABTS^+$ radical 소거능 및 pancreatic lipase 저해활성을 평가하였다. DPPH 라디칼 소거능은 페놀성 화합물의 함량이 상대적으로 높은 n-BuOH 층의 1000 mg/ml의 시험농도에서는 91.2%의 라디칼 소거능을 확인하였고, 지모 추출물에 존재하는 페놀성 화합물이 라디칼 소거능과의 연관성을 시사하였다. 또한 $ABTS^+$ 라디칼 소거능은 EtOAc층이 $IC_{50}=20.5{\pm}1.7mg/ml$, n-BuOH 층이 $IC_{50}=50.5{\pm}0.7mg/ml$의 활성이 확인 되었고, 강한 활성물질의 존재가 시사되었다. 또한, pancreatic lipase 저해활성을 측정한 결과, 강한 $ABTS^+$ 라디칼 소거능을 나타낸 EtOAc 층의 $IC_{50}$은 $31.3{\pm}0.1mg/ml$의 저해율을 나타내었으며 이는 대조군인 orlistat에 비해 약하나 단일물질로 정제할 경우 더욱 강한 효능의 화합물이 존재할 가능성이 있음을 보여준다. 오일의 형태로 얻어진 n-hexane 분획층은 항산화 활성 및 pancreatic lipase 저해 활성을 거의 나타내지 않았다. 향후 이들 활성물질 동정을 통한 활성 기작에 대한 연구가 필요하며 본 연구결과는 보다 우수한 라디칼 소거능 및 pancreatic lipase 저해능을 가지는 새로운 선도화합물 발굴을 위한 기초자료로 활용가능하리라 사료된다.

Keywords

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