Isolation of Antimicrobial Substance from Schizandra chinensis Baillon and Antimicrobial Effect

오미자로부터 항균활성 물질의 분리 및 항균효과

  • Lee, Ju-Yeun (Graduate School of Food Science and Technology, Chungbuk National University) ;
  • Min, Young-Kyoo (Graduate School of Food Science and Technology, Chungbuk National University) ;
  • Kim, Hee-Yun (Division of Food Standardization, Korea Food and Drug Administration)
  • 이주연 (충북대학교 식품공학과) ;
  • 민용규 (충북대학교 식품공학과) ;
  • 김희연 (식품의약품안전청 식품규격과)
  • Published : 2001.06.30

Abstract

In order to isolate antimicrobial substances from Schizandra chinensis, the dried fruits were extracted with the methanol and the extract showed a strong antimicrobial activity. Also, the methanol exract was further fractionated with hexane, dichloromethane, ethylacetate and buthanol. The ethyl acetate-soluble fraction showed the strongest antimicrobial activity. These fraction were further separated by using various chromatographic methods including thin layer chromatography, silicagel open column chromatography and prep. HPLC. A major component S-EA-5-T1 and S-EA-5-T3 from the ethyl acetate fraction, which showed a strong antimicrobial activity was identified by Mass and NMR spectrometry. Two compounds were isolated and identified as trimethylcitrate and the essential oil of Schizandra chinensis and was estimated as gomisin C, respectively. The growth of S. typhimurium was also inhibited about 1.65 to 2.86 log cycle in minced pork by the addition 1% of Schizandra chinensis extract for 12 days at $4^{\circ}C$. These results suggested that these compounds have a strong potential as a natual food preservatives.

오미자 열매로부터 항균활성물질을 분리하기 위하여 methanol 조추출물의 용매분획의 항균력을 측정하였다. 항균활성을 나타낸 methanol 조추출물은 다시 여러 가지 용매로 순차적으로 분배하여 n-hexan층, dichloromethane층, ethyl acetate층, buthanol층과 water층을 얻은 다음, 이들 분배층에 대해 항균활성을 검색한 결과, ethyl acetate층에서 가장 활성이 높게 나타났다. 활성이 높게 나타난 ethyl acetate층은 감압증류한 후, 여러 가지 chromatography를 이용하여 분리, 정제한 다음, MS, $^1H-NMR,\;^{13}C-NMR,\;$, DEPT 및 2D NMR등을 이용하여 항균활성물질의 구조를 동정하였다. 그 결과 오미자의 약리기능을 나타내는 주요성분인 lignan계통의 화합물인 gomisin C로 추정되는 compound를 분리하였고, 다른 하나는 오미자의 정유성분인 trimethylcitrate로 동정하였다. 또한 오미자추출물의 균증식도와 분쇄육의 저장성에 미치는 효과를 검토하기 위하여 식품보장실험을 수행하였다. 그 결과 Salmonella typhimurium에 의해 문제시되는 식품에 천연보존료로서의 이용가능성을 시사하였다.

Keywords