Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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The Antioxidative Effect of Ethanol Extracts from Lithospermum erythrorhizon Siebold & Zucc., Xanthium strumarium Linn, and Lonicera japonica

한약재에탄올 추출물의 항산화 효과

  • Jung, Min-Hwa (Department of Beauty Art, Seokyeong University) ;
  • Lee, Su-Seon (R&D Center, Sunmarine Biotech, Kyeongsang National University) ;
  • Park, Si-Hyang (R&D Center, Sunmarine Biotech, Kyeongsang National University) ;
  • Hwang, Hye-Jung (Department of Food and Nutrition, Dongbusan College)
  • Received : 2013.04.04
  • Accepted : 2013.05.28
  • Published : 2013.05.30
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Abstract

In this study, we examined the antioxidative activities of ethanol extracts obtained from three plants; Lithospermum erythrorhizon Siebold & Zucc., Xanthium strumarium Linn, and Lonicera japonica, which have traditionally been used as drugs in Eastern medicine in Korea. Their extraction yields were 7.01%, 2.92%, and 7.95% in Lithospermum erythrorhizon Siebold & Zucc., Xanthium strumarium L, and Lonicera japonica, respectively. The contents of the phenolic compounds were $4.3{\pm}0.1{\mu}g/ml$, $5.4{\pm}0.1{\mu}g/ml$, and $4.6{\pm}0.1{\mu}g/ml$ in Lithospermum erythrorhizon Siebold & Zucc., and Xanthium strumarium L, respectively. Furthermore, the radical scavenging activity measured through the DPPH assay appeared highest in the Lonicera japonica's extract, and its $EC_{50}$ was 0.24 mg/ml. Compared to the control, the xanthine oxidase inhibiting activities of all extracts were effective at 0.01 mg/ml concentration. Superoxide radical scavenging activity in Lithospermum erythrorhizon Siebold & Zucc. and Lonicera japonica was more than 80%, with a concentration of 50 mg/ml. OH radical scavenging activity was 40% in the three plants, with a concentration of 50 mg/ml scavenging activity. From our results, we demonstrated that the ethanol extracts of three medicinal plants have antioxidant activities and could be potential candidates for natural antioxidants.

본 연구에서는 한약 재료로 널리 이용되고 있는 3종의 약용식물(지치, 창이자, 인동초)을 기능성 소재로 이용하기 위하여 총 페놀함량, DPPH radical 소거능, xanthine oxidase 저해능 등의 실험을 통해 한약재의 항산화 활성을 살펴보았다. 지치, 창이자, 인동초의 수율은 각 7.01%, 2.92%, 7.95%, 총 페놀함량은 각 $4.3{\pm}0.1{\mu}g/ml$, $5.4{\pm}0.1{\mu}g/ml$, $4.6{\pm}0.1{\mu}g/ml$를 함유하고 있었다. DPPH radical 소거능은 인동초가 0.24 mg/ml에서 $EC_{50}$이 나타났으며 나머지 2종 모두 높은 DPPH radical 소거능을 보였다. Xanthine oxidase 저해능은 0.01 mg/ml의 농도에서 한약재 3종 모두 대조구로 사용된 ascorbic acid보다 더 높은 저해 활성을 나타내었다. 그 외에도 Superoxide radical 소거활성은 지치와 인동초가 50 mg/ml의 농도에서 80% 이상의 소거활성을 보였으며, OH radical 소거활성은 50 mg/ml의 농도에서 40% 이상의 소거활성이 나타났다. 이상의 결과로부터 지치, 창이자, 인동초 모두 높은 항산화 활성을 가지고 있으며, 기능성 소재로 활용 가능함을 확인하였다.

Keywords

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