Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Effects of Xylooligosaccharides on the Growth of Intestinal Microflora.

자일로올리고당이 장내 세균에 미치는 영향

  • 류보경 (대한제당㈜ 중앙연구소) ;
  • 이지완 (대한제당㈜ 중앙연구소) ;
  • 이창승 (대한제당㈜ 중앙연구소) ;
  • 현승일 (대한제당㈜ 중앙연구소) ;
  • 박윤제 (대한제당㈜ 중앙연구소) ;
  • 안준배 (대한제당㈜ 중앙연구소) ;
  • 양창근 (대한제당㈜ 중앙연구소) ;
  • 윤세왕 (대한제당㈜ 중앙연구소)
  • Published : 2002.12.01
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Abstract

To investigate the effects of xylooligosaccharides on the in vitro growth of intestinal bacteria, various species were cultivated individually on the m-PYF medium containing a carbon source (0.5% w/v) such as xylooligosaccharides, isomaltooligosaccharides, fructooligosaccharides and sucrose, respectively. The health-promoting microorganisms such as Bifidobacterium bifidum, Bifidobacterium infantis, Bifidobacterium longum, Lactobacillus casei and Lactobacillus acidophilus grew more effectively by xylooligosaccharides than by other carbon source, though xylooligosaccharides inhibited the growth of Clostridium perfringens, Bacteroides fragilis, Escherichia coli, Staphylococcus aureus and Salmonella typhumurium. At the mixed culture xylooligosaccharides exerted a preferential stimulatory effects on numbers of the health-promoting microorganisms, while xylooligosaccharides inhibited populations of potential pathogens at relatively low level. Xylooligosaccharides also maintained the acidity of culture with Streptococcus mutans, caries-inducing bacteria, over pH 5.0. These results suggest that xylooligosaccharides selectively promote the growth of the health-promoting microorganisms in human intestine and prevent caries by inhibiting acid production from Streptococcu mutans.

대한제당(주) 중앙연구소에서 기능성 감미료로서 개발한 자일로올리고당이 장내세균의 생장에 미치는 영향을 알아보기 위하여 in vitro실험을 하였다. 탄소원 이용능을 알아보기 위하여 당이용능검색배지인 m-PYF medium에 탄소원으로서 자일로올리고당과 시판중인 올리고당인 이소말토올리고당과 프럭토올리고당, sucrose를 각각 0.5%(w/v) 첨가한 후 여러 장내 세균을 각각 배양하였다. 장내유익균인 Bifidobacterium bifidum, Bifidobacterium infantis, Bifidobacterium longum, Lactobacillus casei 및 Lactobacillus acidophilus는 다른 탄소원보다 자일로올리고당이 첨가된 배지에서 훨씬 더 잘 생장하였으나, Clostridium perfringens, Bacteroides fragilis, Escherichia coli, Staphylococcus aureus와 Salmonella typhumurium 등 장내 유해균은 생장이 저해되었다 또한, 이들 세균을 혼합배양한 경우에도 장내 유익균의 생균수는 증가하였고, 유해균은 상대적으로 낮은 농도로 억제되었다. 충치를 유발하는 원인 균주인 Strepto-coccus mutans를 자일로올리고당이 첨가된 m-PYF medium에서 배양하였을 때 배양액의 pH가 5.0이상으로 유지되었다. 이러한 결과들을 볼 때 자일로올리고당은 인체의 장내 유익균에만 선택적으로 작용하여 생장을 증진시킬 뿐 아니라, S. mutans의 생장시 산 생성을 억제함으로써 충치 발생을 예방할 수 있을 것으로 사료된다.

Keywords

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