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Antibacterial Activities of Et-OH Extract from Extruded White Ginseng on Tooth Decay Bacteria

압출성형 백삼 Et-OH 추출물의 충치유발균에 대한 항균활성

  • Son, Hyun-Jung (Dept. of Food Science and Technology, Kongju National University) ;
  • Han, Min-Soo (Dept. of Dental Technology, Hyejeon College) ;
  • Ryu, Gi-Hyung (Dept. of Food Science and Technology, Kongju National University)
  • Published : 2009.07.31

Abstract

In this study, antibacterial activity of extruded ginseng extract by 60 and 80% Et-OH were investigated by agar diffusion assay against two bacteria causing dental caries (Streptococcus mutans and Lactobacillus casei). Extrusion conditions were 20% moisture content $100^{\circ}C$ and $140^{\circ}C$ barrel temperature. The inhibition effect of 60% Et-OH ginseng extract was higher than 80% Et-OH ginseng extract. The minimum inhibitory concentration (MIC) of 80% Et-OH extruded ginseng extract at 140 and $100^{\circ}C$ barrel temperature against L.casei were 100 and 150 mg/mL respectively using broth assay method. The amount of glucosyltransferase (GTase) inhibitory content was the highest in extruded ginseng at $140^{\circ}C$ barrel temperature with 60% Et-OH. Moreover, n-hexane and n-butanol fraction ginseng extract had potential against tested bacteria. Our results demonstrated that antibacterial activities of extruded ginseng extract at $140^{\circ}C$ barrel temperature were more effective than Ex-$100^{\circ}C$, RG and WG.

본 연구는 추출용매의 농도에 따른 추출수율 및 항균성을 측정하였으며 항산화 활성과 항균활성의 상관관계를 검토하고, 분획 용매에 따른 치아우식균에 대한 항균성 등을 측정하여 천연 항균제인 인삼추출물의 치아우식 예방에의 이용 가능성을 확인하기 위하여 실시하였다. 백삼 원료의 수분 함량은 20%, 배럴온도는 $100^{\circ}C$, $140^{\circ}C$ 두 조건으로 압출성형 하였다. 항균성 측정 결과 디스크 확산법은 S. mutans보다 L. casei 균에 대한 저해율이 높았으며 60% Et-OH 추출물이 항균활성이 컸다. GTase 또한 디스크 확산법과 같이 60% Et-OH에서 S. mutans에 대한 우수한 저해효과를 보였다. 반대로 최소저해농도 측정에서는 Et-OH 농도 80%가 60%보다 모든 인삼추출물에서 항균활성이 높게 나타났고 인삼추출물의 농도가 높아질수록 저해율도 증가하였다. L.casei 균에 대한 저해율은 대부분 150 mg/mL 농도부터 저해가 진행되었지만 $140^{\circ}C$ 압출성형 백삼은 100 mg/mL 농도부터 저해가 진행되면서 높은 저해효과를 보였다. 분획 용매에 따라서는 n-butanol과 n-hexane 추출물에서 항균성을 보였으며 사포닌과 함께 페놀계 화합물이 용출되면서 n-butanol 분획의 항균활성이 증가한 것으로 사료된다.

Keywords

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