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Mutans streptococci의 자일리톨 내성균주와 감성균주의glucosyltransferase mRNA의 정량적 비교 연구

Quantitative comparison of mRNA expression of glucosyltransferase(GTF) between xylitol-resistant(XR) andxylitol-sensitive(XS) mutans streptococci

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주제분류치의학

초록

자일리톨에 장기간 노출된 mutans streptococci는 자일리톨에 내성이 발현되어 자일리톨 내성균주가 생성된다고 알려져 있다. 본 연구의 목적은 mutans streptococci에서 자일리톨 내성균주와 감성균주의 gtf 유전자 발현량을 각각의 유전자별로 정량적으로 분석하고 비교하는 것이다. 실시간 역전사 중합효소연쇄반응법을 이용하여 각각의 gtf 발현을 조사한 결과 gtfD 는 증가한 반면, gtfB 와 gtfC 는 감소하였는데 이는 각 유전자의 독립된 조절기전이 존재함을 보여주는 것이다. 또한 자일리톨에 노출된 mutans streptococci에서의 glucosyltransferase와 연관된 유전자변형이 자일리톨의 치아우식증 예방효과의 작용기전 중 하나임을 알 수 있었다.

Abstract

Since the long-term exposure of mutans streptococci to xylitol is known to select for xylitol-resistant(XR) natural mutants, the occurrence and survival of such XR strains were performed in batch culture methods. The aim of the study was to compare the differentiation and quantification of mRNA expression of the gtf genes of XR and XS mutans streptococci. Using a real-time reverse-transcription polymerase chain reaction, the expression of each gtf was determined. In XR strains, the relative levels of transcription of gtfB and gtfC were decreased while that of gtfD was increased, suggesting the presence of independent promoters. It also suggested that mutation related to production of glucosyltransferase occurred under the exposure of xylitol could explain the caries-preventive mechanisms of xylitol.

참고문헌 (26)

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