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The influence of Lactobacillus rhamnosus GG on the binding ability of Streptococcus mutans

Lactobacillus rhamnosus GG가 Streptococcus mutans의 부착능에 미치는 영향

  • Lee, Su-Jun (Department of Pediatric Dentistry, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Lee, Sung-Hoon (Department of Oral microbiology and Immunology, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Choi, Bong-Kyu (Department of Oral microbiology and Immunology, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kim, Jung-Wook (Department of Pediatric Dentistry, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kim, Young-Jae (Department of Pediatric Dentistry, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kim, Chong-Chul (Department of Pediatric Dentistry, School of Dentistry and Dental Research Institute, Seoul National University)
  • 이수전 (서울대학교 치의학대학원 소아치과학교실, 치학연구소) ;
  • 이성훈 (서울대학교 치의학대학원 구강미생물학교실, 치학연구소) ;
  • 최봉규 (서울대학교 치의학대학원 구강미생물학교실, 치학연구소) ;
  • 김정욱 (서울대학교 치의학대학원 소아치과학교실, 치학연구소) ;
  • 김영재 (서울대학교 치의학대학원 소아치과학교실, 치학연구소) ;
  • 김종철 (서울대학교 치의학대학원 소아치과학교실, 치학연구소)
  • Received : 2010.11.30
  • Accepted : 2011.03.08
  • Published : 2011.05.31

Abstract

Probiotics has currently attracted for means of preventive treatment measurement instead of using non-specific and broad spectrum antimicrobials. In previous studies, two main probiotics species, Lactobacillus and Bifidobateria, showed the reduction of DMFS and S. mutans counts. However, the timing of introducing probiotic species to oral cavity is not clear. The aim of this study is to evaluate the changes of binding ability of S. mutans in various concentrations and inoculation time of L. rhamnosus GG. Adding the following concentration of L. rhamnosus GG, $1{\times}10^6$ CFU, $1{\times}10^7$ CFU and $1{\times}10^8$ CFU, to S. mutans medium demonstrates significant reduction of S. mutans counts. Additionally, more reduction was observed when L. rhamnosus were inoculated prior to S. mutans or simultaneously inoculated compared to when S. mutans were inoculated prior to L. rhamnosus after 3 hours of incubation. Based on this research, the timing of introducing probiotics should be considered when probiotics are utilized as a preventive treatment measurement.

최근 들어, 수복 치료 등을 이용한 질병의 직접적인 치료보다는 예방 치료에 대한 중요성이 강조되면서, 그 동안 사용되었던 화학적인 약물을 통한 예방 치료 이외에도 유산균등을 이용한 probiotics에 대한관심이 높아지고 있다. 여러 논문에서 Lactobacillus와 Bifidobateria들이 DMFS와 S. mutans를 감소한다고 보고하고 있다. 하지만, 이러한 미생물들의 접종 시기와 접종 농도에 대한 언급은 부족하다. 따라서 본 실험에서는 probiotics의 대표적인 균인, L. rhamnosus GG를 이용하여 예방 효과를 보기 위한 적정 농도를 재정립하고, 접종시기를 고찰하였다. S. mutans 배지에 $1{\times}10^6$ CFU이상 농도의 L. rhamnosus를 접종하였을 때 S. mutans count가 현저하게 감소하는 것을 볼 수 있었다. 접종 순서는 L. rhamnosus와 S. mutans를 동시에 접종하거나 L. rhamnosus를 S. mutans 보다 선행하여 접종하였을 때가, S. mutans를 L. rhamnosus 보다 선행하여 접종하였을 때에 비교하여 S. mutans count를 더 감소시켰다. 이 실험의 결과로 보아 probiotics의 접종 시기는 probiotics을 임상에 적용할 때 반드시 고려되어야 하겠다.

Keywords

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