Nitrite Scavenging Ability and SOD-like Activity of a Sterol Glucoside form Chrysanthemum coronarium L. var. spatiosum

쑥갓 스테롤배당체의 아질산염소거작용 및 SOD 유사활성

  • Cho, Min-Jung (Department of Food Science of Technology, Seoul National University of Technology) ;
  • Park, Mi-Jung (Department of Visual Optics, Seoul National University of Technology) ;
  • Lee, Heum-Sook (Department of Food Science of Technology, Seoul National University of Technology)
  • 조민정 (서울산업대학교 식품공학과) ;
  • 박미정 (서울산업대학교 안경광학과) ;
  • 이흠숙 (서울산업대학교 식품공학과)
  • Published : 2007.02.28

Abstract

From the total methanolic extract of Chrysanthemum coronarium L. var. spatiosum (Compositae), nitrite scavenging ability and superoxide dismutase (SOD)-like activity were analyzed as antioxidative characteristics. After successive partitioning with chloroform, n-butanol, and water, the chloroform fraction showed the most significant nitrite scavenging ability with an $IC_{50}$ value of 39 ppm compared with the values of vitamin C and chlorogenic acid, 15 ppm and 36 ppm, respectively. The active fraction was subjected to silica gel and Sephadex LH-20 column chromatography, and the compound was isolated and identified as ${\beta}-sitosterol-O-{\beta}-D-glucoside$ using $^{1}H-NMR$ and $^{13}C-NMR$ spectral data. The glucoside was further hydrolyzed and confirmed as a glycosylated ${\beta}-sitosterol$. The compound and its aglycone, ${\beta}-sitosterol$, showed different nitrite scavenging and SOD-like activity. The $IC_{50}$ value of nitrite scavenging ability of the compound was 335 ppm at pH 1.5, while that of its aglycone was 41 ppm. As for the SOD-like activity, the $EC_{50}$ values of the sterol and the glucoside were 1,291 ppm and >2,000 ppm, respectively, compared with those of vitamin C and chlorogenic acid, 38 ppm and 449 ppm, respectively.

쑥갓의 항산화 활성을 알아보기 위해 쑥갓 총 메탄올추출물의 아질산염 소거작용과 SOD 유사활성을 측정하였다. 아질산염 소거작용과 SOD 유사활성을 가지고 있는 총 메탄올 추출물로부터 클로로포름, n-부탄올 및 물 분획물을 제조하여 각각의 활성을 측정하였다. pH가 1.5일 때의 클로로포름 분획물의 $IC_{50}$값은 39ppm으로 가장 우수한 아질산염 소거작용을 보였으며, vitamin C와 chlorogenic acid의 $IC_{50}$값이 15ppm과 36ppm일 때 클로로포름 분획물은 양성대조군인 chlorogenic acid와 동등한 소거작용을 보였다. 아질산염 소거작용에 대하여 유의성 있게 높은 활성을 나타낸 클로로포름 분획물을 silica gel 컬럼크로마토그래피와 sephadex LH-20 컬럼크로마토그래피를 이용하여 분획의 활성성분인 compound I을 분리하였다. 분리된 compound를 $^{1}H-NMR$$^{13}C-NMR$ spectral data를 통하여 구조를 동정한 결과 compound I은 ${\beta}-sitosterol-O-{\beta}-D-glucoside$임을 확인하였다. Compound I과 그 aglycone인 ${\beta}-sitosterol$의 아질산염 소거작용과 SOD 유사활성은 다소 차이가 있었다. 양성대조군으로 사용한 vitamin C와 chlorogenic acid의 $IC_{50}$값이 pH 1.5에서 각각 15ppm과 36ppm일때 compound I의 $IC_{50}$값이 335ppm, ${\beta}-sitosterol$$IC_{50}$값이 41ppm으로 가수분해된 aglycone이 아질산염 소거작용이 훨씬 높았다. SOD 유사활성의 경우 vitamin C와 chlorogenic acid의 $EC_{50}$ 값은 38ppm, 449ppm으로 이와 비교시 ${\beta}-sitosterol$과 배당체의 $EC_{50}$ 값은 1,291ppm과 2,000ppm 이상으로 나타났다.

Keywords

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