Abstract |
Streptococcus mutans alone or cell-free glucosyltransferase (G-Tase)-together with either Streptococcus sanguis, Streptococcus salivarius, Actinomyces viscosus, or Lactobacillus casei cells-formed artificial dental plaque that firmly adhered to glass electrodes in a continuous culture system containing sucrose. The pH in these artificial plaque samples decreased more than did that of the surrounding medium. In the absence of GTase, the bacteria other than S. mutans did not form firmly-adhering plaque on glass electrodes. The pH of the plaque formed with GTase alone did not show the pH decrease seen when the plaque contained bacteria, but, because it catalyzed the synthesis of glucan, it is suggested that the glucan acts as a diffusion barrier to retard acid loss from plaque containing acid-producing bacteria.
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Authors | T Takehara, M Itoh, N Hanada, E Saeki |
Journal | Journal of dental research
(J Dent Res)
Vol. 64
Issue 3
Pg. 447-9
(Mar 1985)
ISSN: 0022-0345 [Print] United States |
PMID | 3156164
(Publication Type: Journal Article)
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Chemical References |
- Glucans
- Glucosyltransferases
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Topics |
- Actinomyces
(physiology)
- Adhesiveness
- Bacteriological Techniques
- Dental Plaque
(microbiology, physiopathology)
- Glucans
(metabolism)
- Glucosyltransferases
(pharmacology)
- Humans
- Hydrogen-Ion Concentration
- Lactobacillus
(physiology)
- Streptococcus
(physiology)
- Streptococcus mutans
(enzymology, physiology)
- Streptococcus sanguis
(metabolism, physiology)
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