Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Free radical scavenging and α-glucosidase inhibitory effects of a roots extract of Aruncus dioicus var. kamtschaticus

재배 삼나물 뿌리 추출물의 자유 라디칼소거 및 α-glucosidase 저해활성

  • Jeong, Gyeong Han (Department of Food Science and Biotechnology, Daegu University) ;
  • Kim, Tae Hoon (Department of Food Science and Biotechnology, Daegu University)
  • 정경한 (대구대학교 식품공학과) ;
  • 김태훈 (대구대학교 식품공학과)
  • Received : 2016.09.06
  • Accepted : 2016.10.19
  • Published : 2016.12.30
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Abstract

As part of our continuing search for bioactive natural products, the antioxidant and ${\alpha}$-glucosidase inhibitory activities of an 80% methanolic extract and organic solvent soluble-portions of Aruncus dioicus var. kamtschaticus roots were investigated by using a bioassay system. The antioxidant activity of A. dioicus var. kamtschaticus roots extract and organic solvent soluble-portions were assessed by examining with 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) ($ABTS^+$) radical scavenging. In addition, anti-diabetic effects of the A. dioicus var. kamtschaticus root extract and organic solvent soluble-portions were tested via ${\alpha}$-glucosidase inhibition assay. The total phenolic contents of the products were determined by applying UV-VIS spectrophotometry. All tested samples showed dose-dependent radical scavenging and ${\alpha}$-glucosidase inhibitory properties. In particular, the ${\alpha}$-glucosidase inhibitory and radical scavenging effects of the ethyl-acetate (EtOAc)-soluble portion from the roots of A. dioicus var. kamtschaticus were greater than those from other solvent-soluble portions. These results indicate that A. dioicus var. kamtschaticus could be considered a new effective source of natural antioxidants and anti-diabetic materials. More systematic research of the constituents of the roots of this A. dioicus variety will be conducted to further develop its antioxidative and anti-diabetic properties.

삼나물 뿌리를 80% 메탄올로 침지 추출하여 얻어진 추출물에 대해 n-hexane, EtOAc 및 n-BuOH의 유기용매를 활용하여 순차 분획을 실시하였고, 얻어진 결과물에 대하여 DPPH, $ABTS^+$ 라디칼 소거능 및 ${\alpha}$-glucosidase 저해활성을 평가하였다. DPPH 라디칼 소거능은 총 페놀성 화합물의 함량이 상대적으로 높은 EtOAc 층에서 $IC_{50}$값이 $32.3{\pm}2.3{\mu}g/mL$으로 가장 우수한 DPPH 라디칼 소거능을 확인하였고, 삼나물 뿌리 의 EtOAc 가용부에 다량 존재하는 페놀성 화합물과 라디칼 소거능과의 연관성을 시사하였다. 또한 $ABTS^+$ 라디칼 소거능은 EtOAc 층의 $IC_{50}$값이 $18.9{\pm}2.1{\mu}g/mL$의 우수한 라디칼 소거활성이 확인 하였고, 우수한 라디칼 소거 활성물질의 존재가 시사되었다. 또한, ${\alpha}$-glucosidase 저해활성을 평가한 결과, 우수한 라디칼 소거능을 나타낸 EtOAc 층의 $IC_{50}$은 $57.8{\pm}7.8{\mu}g/mL$의 저해활성을 나타내었으며, 이는 positive control인 acarbose의 $IC_{50}$값인 $501.1{\pm}17.5{\mu}g/mL$과 비교하여 우수한 활성이었으며, 추출물 상태의 시료를 단일물질로 정제할 경우 더욱 강한 효능의 화합물이 존재할 가능성을 시사하였다. 향후 이들 활성물질 동정을 통한 활성 기작에 대한 연구가 필요하며 본 연구결과는 보다 우수한 라디칼 소거능 및 ${\alpha}$-glucosidase 저해능을 가지는 새로운 기능성 소재 발굴을 위한 기초자료로 활용 가능할 것으로 사료된다.

Keywords

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