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Determination of Radical Scavenging Activity of Aster yomena (Kitam.) Honda

쑥부쟁이 추출물의 라디칼 소거활성 평가

  • Kim, Min Jeong (Department of Food Science and Nutrition, Pusan National University) ;
  • Kim, Ji Hyun (Department of Food Science and Nutrition, Pusan National University) ;
  • Lee, Sanghyun (Department of Integrative Plant Science, Chung-Ang University) ;
  • Cho, Eun Ju (Department of Food Science and Nutrition, Pusan National University) ;
  • Kim, Hyung Young (Department of Food Science, Gyeongnam National University of Science and Technology)
  • 김민정 (부산대학교 식품영양학과) ;
  • 김지현 (부산대학교 식품영양학과) ;
  • 이상현 (중앙대학교 식물시스템과학과) ;
  • 조은주 (부산대학교 식품영양학과) ;
  • 김현영 (경남과학기술대학교 식품과학부)
  • Received : 2018.06.14
  • Accepted : 2018.09.07
  • Published : 2018.09.30

Abstract

In this study, we investigated the antioxidative effects of AY by measuring 1.1-Diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical ($^{\cdot}OH$), and superoxide radical ($O_2{^-}$) scavenging activities in vitro. AY was extracted with ethanol and then partitioned with n-hexane, methylene chloride ($CH_2Cl_2$), ethylacetate (EtOAc) and n-butanol (n-BuOH). In the DPPH radical scavenging assay, AY at concentrations of 10 to $100{\mu}g/mL$ dose-dependently increased inhibition of DPPH oxidation, with the EtOAc fraction of AY showing the highest DPPH radical scavenging activity fractions. The $^{\cdot}OH$ radical scavenging activities of the extract and four fractions of AY increased by over 80% at a concentration of $50{\mu}g/mL$. In particular, the IC50 value of the EtOAc fraction was $0.03{\mu}g/mL$, which was the lowest value among all fractions. We also found that the EtOAc fraction of AY was better at $O_2{^-}$ radical scavenging than other fractions. Taken together, these results suggest that AY, especially the EtOAc fraction, can be used as a natural antioxidant against free radicals.

본 연구에서는 1.1-Diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical ($^{\cdot}OH$), 그리고 superoxide radical ($O_2{^-}$) 소거능 실험을 통해 쑥부쟁이의 항산화 효과를 평가하였다. 쑥부쟁이는 에탄올로 추출한 뒤, n-hexane, methylene chloride ($CH_2Cl_2$), ethylacetate (EtOAc), 그리고 n-butanol (n-BuOH)로 분획하였다. DPPH 라디칼 소거능 실험에서 모든 추출 및 분획물이 $10-100{\mu}g/mL$의 농도에서 농도 의존적으로 라디칼 소거능이 증가하였으며, 특히 EtOAc 분획물은 가장 강한 DPPH 라디칼 소거능을 나타내었다. 또한 쑥부쟁이는 $50{\mu}g/mL$ 농도에서 80% 이상의 $^{\cdot}OH$ 라디칼 소거율을 보였다. 특히 EtOAc 분획물은 $0.03{\mu}g/mL$에서 IC50 값을 나타내어 추출물과 분획물 중 가장 강한 $^{\cdot}OH$ 라디칼 소거능을 보여주었다. 또한, EtOAc 분획물은 $O_2{^-}$ 라디칼 소거능에서도 가장 강한 소거활성을 보였다. 이러한 결과는 쑥부쟁이가 산화스트레스로 인한 질병을 예방하는 천연 항산화제로서의 활용 가능성이 있음을 보여준다.

Keywords

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