Results 271 to 280 of about 35,071 (303)
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A Statistical Approach to the Ecology of Porphyromonas gingivalis
Journal of Dental Research, 1992Previous studies have suggested that infections with Porphyromonas gingivalis, associated with periodontal disease, may consist of one clonal type. It has also been shown that each individual patient carries a unique clonal type of P. gingivalis, as assessed by DNA fingerprinting.
B G, Loos +6 more
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Mechanisms of evasion of complement by Porphyromonas gingivalis
Frontiers in Bioscience, 2008The complement system is an important host response to invading bacteria. Activation leads to deposition on the bacterial surface of C3b and its' inactivation products and phagocytosis of the opsonised bacteria by host cells. Alternatively the entire complement pathway including terminal components C5b-9 may be activated on the cell surface which gives
Jennifer M, Slaney, Michael A, Curtis
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Genetic Manipulation of Porphyromonas gingivalis
Current Protocols in Microbiology, 2007AbstractPorphyromonas gingivalis, an oral anaerobic bacterium, is an important etiological agent of periodontal disease and may contribute to cardiovascular disease, preterm birth, and diabetes as well. Therefore, genetic studies are of crucial importance in investigating molecular mechanisms of P. gingivalis virulence. Although molecular genetic tools
Myriam, Bélanger +2 more
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Cytokine Degradation by Biofilms of Porphyromonas gingivalis
Current Microbiology, 1998The aim of this study was to determine whether biofilms of Porphyromonas gingivalis could proteolytically degrade the cytokines interleukin (IL)-1beta, IL-6, or IL-1 receptor antagonist (IL-1ra). Biofilms were grown on membrane filters on the surface of Wilkins-Chalgren blood agar. The biofilms were removed from the plates, and solutions containing 2.5
J, Fletcher +4 more
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Surface components of Porphyromonas gingivalis
Journal of Periodontal Research, 2009Background and Objective: Research on Porphyromonas gingivalis, a periodontopathogen, has provided a tremendous amount of information over the last 20 years, which may exceed in part than that on other closely related members in terms of phylogenetic as well as proteomic criteria, including Bacteroides fragilis and B.
F, Yoshimura +4 more
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Role for Porphyromonas gingivalis in the progression of atherosclerosis
Medical Hypotheses, 2009An association between atherosclerosis and Porphyromonas gingivalis (P. gingivalis), a major periodontopathogen, has been shown. However, the question of whether this relationship is causal or coincidental still exist. Many individuals with evidence of atherosclerosis demonstrate seropositivity to this pathogen.
Qian, Wang +2 more
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Subgingival colonization by Porphyromonas gingivalis
Oral Microbiology and Immunology, 2000Porphyromonas gingivalis, a gram‐negative anaerobe, is a major causative agent in the initiation and progression of severe forms of periodontal disease. In order to cause periodontal disease, P. gingivalis must colonize the subgingival region, a process that involves several distinct steps and multiple gene products.
R J, Lamont, H F, Jenkinson
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Effect of Transferrin on the Growth of Porphyromonas gingivalis
Journal of Dental Research, 1991This study describes the effect of transferrin as an iron source on the growth of Porphyromonas (formally Bacteroides) gingivalis. Bacterial growth was monitored spectrophotometrically. All strains of P. gingivalis tested grew well in medium containing transferrin. The growth of P.
E, Inoshita +4 more
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Genotyping of Porphyromonas gingivalis in Relationship to Virulence
2020Porphyromonas gingivalis, a significant periodontal pathogen, is known to possess genetic variations in relation to its virulence. Furthermore, fimbriae encoded by the fimA gene are involved in bacterial adherence to and invasion of host cells, and a known virulence factor of the bacterium.
Atsuo, Amano +2 more
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Pleiotropic pigmentation mutants of Porphyromonas gingivalis
Microbial Pathogenesis, 2000Porphyromonas gingivalis is a Gram-negative, black pigmented oral anaerobe associated with adult periodontitis. The adherence of the bacterium to junctional epithelial cells is the first step in infection and colonization. The molecular mechanisms and genetics of colonization are, as yet, not well understood, although it has been demonstrated that P ...
T, Chen, H, Dong, R, Yong, M J, Duncan
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