Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidant and Antimicrobial Effects of Solvent Fractions from Smilax china L. Leaves

청미래덩굴 잎(Smilax china L.) 용매 분획물의 항산화 및 항균 효과

  • Kim, Joo-Young (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Seoung, Gi-Un (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Chung, Shin-Kyo (School of Food Science and Biotechnology, Kyungpook National University)
  • Received : 2014.06.02
  • Accepted : 2014.07.28
  • Published : 2014.10.31
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Abstract

To utilize Smilax china L. leaves as a natural preservatives, solvent fractions from crude methanol extract were prepared and investigated their antioxidant and antimicrobial activities against Staphylococcus aureus. Antioxidant activities were examined by 1,1-diphenyl-1-picrylhydrazyl radical scavenging and ferric ion reducing antioxidant power assays. Ethyl acetate fraction from Smilax china L. leaves exhibited the strongest antioxidant and antimicrobial activities among the fractions (P<0.05), as well as the highest total phenolic and total flavonoid contents. Caffeic acid, ferulic acid, quercetin, and kaempferol contents in the ethyl acetate fraction from Smilax china L. leaves were determined by TLC and HPLC. In aqueous phase, as well as the n-butanol and n-hexane fractions, quercetin, ferulic acid, and kaempferol were detected in small amounts. Ferulic acid, which showed the highest content, is the major active compound from Smilax china L. leaves.

우리나라에 널리 자생하는 청미래덩굴 잎을 천연 보존료로써 활용하기 위하여 청미래덩굴 잎 추출물을 n-hexane, ethyl acetate, n-butanol로 분획하고 항산화 활성과 식중독 세균인 Staphylococcus aureus에 대하여 항균 활성을 조사하였으며 활성 성분을 TLC와 HPLC로 분석하였다. DPPH radical 소거능 활성은 ethyl acetate, n-butanol, n-hexane 분획물의 순으로 높게 나타났고, 총 페놀성 화합물 함량 역시 ethyl acetate 분획물이 가장 높았다(P<0.05). 총 플라보노이드 화합물의 함량은 ethyl acetate 분획물이 다른 분획물보다 월등히 높았다. 청미래덩굴 잎의 용매 분획물은 시험균주인 S. aureus에 대하여 12.4~8.5 mm의 생육 저해환을 나타내었으며 ethyl acetate 분획물의 항균 활성이 가장 강하였다(P<0.05). 항균 활성과 항산화 활성이 강하게 나타난 청미래덩굴의 ethyl acetate 분획물을 TLC로 확인 후 다른 분획물들과 HPLC로 분석하여 caffeic acid, ferulic acid, quercetin, kaempferol을 확인하고 그 함량을 측정하였다. Ethyl acetate 분획물이 다른 분획물에 비해 높은 phenolic compounds 함량을 나타냈고, ferulic acid가 그중 가장 높은 함량을 나타내어 청미래덩굴 잎의 항산화 및 항균 활성을 나타내는 주요 활성 물질로 사료된다.

Keywords

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