Trypsin-like Enzyme Activity of the Extracellular Membrane Vesicles of Bacteroides gingivalis W50
نویسندگان
چکیده
منابع مشابه
Interaction of extracellular vesicles of Bacteroides gingivalis W50 with human polymorphonuclear leucocytes.
The effects of B. gingivalis W50 extracellular vesicles (ECV) on neutrophil chemotaxis and viability were assessed and compared with those of whole cells and the extracellular non-dialysable soluble protein (EP) fraction. None of the fractions tested, including soluble fractions derived from cells and ECV by sonication, induced neutrophil chemotaxis. Only ECV and cells inhibited f-MLP-stimulate...
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heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
15 صفحه اولEffect of hemin on the physiology and virulence of Bacteroides gingivalis W50.
Bacteroides gingivalis W50 was grown in a chemostat under steady-state conditions at pH 7.5 +/- 0.2 and a constant growth rate of 6.9 h for periods of up to 6 weeks (146 bacterial generations) in a complex medium. Hemin was capable of limiting the growth of cells up to a concentration of approximately 0.5 micrograms/ml since higher concentrations of hemin did not increase cell yields; cells gre...
متن کاملIdentification of the alpha-enolase P46 in the extracellular membrane vesicles of Bacteroides fragilis
BACKGROUND Members of the Bacteroides fragilis group are the most important components of the normal human gut microbiome, but are also major opportunistic pathogens that are responsible for significant mortality, especially in the case of bacteraemia and other severe infections, such as intra-abdominal abscesses. Up to now, several virulence factors have been described that might explain the i...
متن کاملIsolation of colonial variants of Bacteroides gingivalis W50 with a reduced virulence.
The spontaneous appearance of unusual colony forms was observed during prolonged growth of Bacteroides gingivalis W50 in a chemostat. Two variants were selected for further study which could be distinguished from the parent strain by the rate and intensity of pigmentation of their colonies. For example, after anaerobic incubation for 14 days, variant W50/BR1 produced brown colonies whereas thos...
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ژورنال
عنوان ژورنال: Microbiology
سال: 1987
ISSN: 1350-0872,1465-2080
DOI: 10.1099/00221287-133-10-2883