Antibacterial Activity of $NANOVER^{TM}$ Against Oral Malodor Generating Microorganisms 1. The Effect of Nanosilver on Growth of Oral Malodor Generating Microorganisms

구취유발세균에 대한 $NANOVER^{TM}$의 항균효과 검사 1. Nanosilver가 구취 세균의 증식에 미치는 영향

  • Jung, Young-Hee (Food Science and Nutrition, Daegu Catholic University) ;
  • Mo, Hye-Won (Food Science and Nutrition, Daegu Catholic University) ;
  • Jeong, Ji-Suk (Food Science and Nutrition, Daegu Catholic University) ;
  • Choi, Kyung-Ho (Food Science and Nutrition, Daegu Catholic University) ;
  • Choi, Jae-Kap (Department of Oral Medicine, School of Dentistry, Kyungpook National University) ;
  • Hur, Yun-Kyung (Department of Oral Medicine, School of Dentistry, Kyungpook National University) ;
  • Lee, Sang-Heun (Department of Otolaryngology, School of Medicine, Kyungpook National University)
  • 정영희 (대구가톨릭대학교 생활과학대학 식품영양학과) ;
  • 모혜원 (대구가톨릭대학교 생활과학대학 식품영양학과) ;
  • 정지숙 (대구가톨릭대학교 생활과학대학 식품영양학과) ;
  • 최경호 (대구가톨릭대학교 생활과학대학 식품영양학과) ;
  • 최재갑 (경북대학교 치의학전문대학원 구강내과학교실) ;
  • 허윤경 (경북대학교 치의학전문대학원 구강내과학교실) ;
  • 이상흔 (경북대학교 의학전문대학원 이비인후과학교실)
  • Published : 2009.03.30

Abstract

Recently there is much interest in the antibacterial activity of nano-sized silver particle (nanosilver) since silver is known to be safe and effective as disinfectant for a long time. Oral malodor is considered to originate in the oral cavity primarily as a result of production of malodorous compounds by oral bacteria. Major compounds responsible for oral malodor are volatile sulfur compounds, which is thought to be generated by the G(-) anaerobic bacteria found normally in the oral cavity, especially on the dorsum of the tongue. The purposes of this study were to investigate the effect of nanosilver on growth of oral malodor generating microorganisms, including Fusobacterium nucleatum, Prevotella melaninogenica, Klebsiella pneumonia, and to determine the optimal culture condition of them. The results were as follows: 1. The optimal culture condition for P. melaninogenica was vacuum culture using desiccator after evacuation of air by vacuum pump in chopped beef meat media. 2. The growth of K. pneumonia was temporarily inhibited by nanosilver (5 ppm and 10 ppm). 3. The morphological alteration and cell damage caused by nanosilver were observed in K. pneumonia.

본 연구는 구취생성의 주요 원인균에 대한 nanosilver의 항균효과를 조사하기 위해서 시행되었으며, 이와 더불어 이들 세균의 증식 조건도 함께 연구하였다. 포항공과대학교 나노기술센터로부터 $NANOVER^{TM}$, WA 1000 현탁액을 제공 받아 희석하여 사용하였으며, 공시균으로는 주요 구취생성균으로 알려진 Fusobacterium nucleatum (KCTC 2640), Prevotella melaninogenica (KCTC 3689), Klebsiella pneumonia (KCTC 1560) 3종의 세균류를 한국생명공학연구원 생명자원센터로부터 구입하여 사용하였다. 공시균의 배양에 혐기성세균 배양에 이용되는 tryptone- yeast extract-ammonium acetate(TYA) 배지와 chopped beef meat(CBM) 배지를 이용하였다. 1. 최적배양조건으로 감압배양, CBM 배지가 적당한 것으로 나타났다. 2. 간균인 K. pneumonia에 Nanover(5 및 10 ppm)를 처리하고 주사형 전자현미경으로 균체의 형태를 관찰한 결과는 세균의 생장점 부근에서 세포벽에 손상을 주어 세포벽을 절단하여 다량의 막상 편린을 생성하고 autolysin을 불활성화 시켜 filament형 균체를 형성하여 균의 증식은 일시적으로 억제시킬 수 있었으나 완전히 사멸시키지는 못하였으며, 구취 세균을 전혀 다른 형태로 변화시키는 것으로 나타났다. 그러나 항균제로서의 역할은 가진 것으로 확인되었다.

Keywords

References

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