Aggregation of Actinomyces strains by extracellular vesicles produced by Bacteroides gingivalis.
The aggregation of Actinomyces viscosus and Actinomyces naeslundii with extracellular vesicles of Bacteroides gingivalis was studied. Factors influencing the aggregation phenomenon were examined. L-Arginine was found to effectively inhibit aggregation as was an antibody preparation directed against a B. gingivalis surface hemagglutinin. Aggregation occurred over a wide pH range and did not seem to be affected by high salt concentrations or the presence of carbohydrates. Treatment of the vesicle preparation with proteases, sodium dodecyl sulphate, and high temperatures diminished or eliminated aggregation, while similar treatment of the Actinomyces had no effect on aggregation.
Département de biochimie, Faculté des sciences et de génie, Université Laval, Québec, Canada.
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Bourgeau
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Mayrand
D000190:Actinomyces / Q000502:physiology*; D001120:Arginine / Q000494:pharmacology; D001422:Bacterial Adhesion / Q000187:drug effects / Q000502:physiology*; D001439:Bacteroides / Q000502:physiology*; D006388:Hemagglutinins / Q000502:physiology; D006358:Hot Temperature; D006801:Humans; D066298:In Vitro Techniques; D009055:Mouth / Q000382:microbiology; D010447:Peptide Hydrolases / Q000494:pharmacology
D006388:Hemagglutinins; D001120:Arginine; D010447:Peptide Hydrolases