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Journal articles on the topic 'Streptococcus gordonii'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Brown, Alan E., Jeffrey D. Rogers, Elaine M. Haase, Peter M. Zelasko, and Frank A. Scannapieco. "Prevalence of the Amylase-Binding Protein A Gene (abpA) in Oral Streptococci." Journal of Clinical Microbiology 37, no. 12 (1999): 4081–85. http://dx.doi.org/10.1128/jcm.37.12.4081-4085.1999.

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Salivary amylase binds specifically to a number of oral streptococcal species. This interaction may play an important role in dental plaque formation. Recently, a 585-bp gene was cloned and sequenced from Streptococcus gordonii Challis encoding a 20.5-kDa amylase-binding protein (AbpA). The goal of this study was to determine if related genes are present in other species of oral streptococci. Biotinylated abpA was used in Southern blot analysis to screen genomic DNA from several strains representing eight species of oral streptococci. This probe hybridized with a 4.0-kbHindIII restriction frag

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2

Kreth, Jens, Yongshu Zhang, and Mark C. Herzberg. "Streptococcal Antagonism in Oral Biofilms: Streptococcus sanguinis and Streptococcus gordonii Interference with Streptococcus mutans." Journal of Bacteriology 190, no. 13 (2008): 4632–40. http://dx.doi.org/10.1128/jb.00276-08.

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ABSTRACT Biofilms are polymicrobial, with diverse bacterial species competing for limited space and nutrients. Under healthy conditions, the different species in biofilms maintain an ecological balance. This balance can be disturbed by environmental factors and interspecies interactions. These perturbations can enable dominant growth of certain species, leading to disease. To model clinically relevant interspecies antagonism, we studied three well-characterized and closely related oral species, Streptococcus gordonii, Streptococcus sanguinis, and cariogenic Streptococcus mutans. S. sanguinis a

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3

Cheng, X., S. Redanz, P. Treerat, et al. "Magnesium-Dependent Promotion of H2O2 Production Increases Ecological Competitiveness of Oral Commensal Streptococci." Journal of Dental Research 99, no. 7 (2020): 847–54. http://dx.doi.org/10.1177/0022034520912181.

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The pyruvate oxidase (SpxB)–dependent production of H2O2 is widely distributed among oral commensal streptococci. Several studies confirmed the ability of H2O2 to antagonize susceptible oral bacterial species, including caries-associated Streptococcus mutans as well as several periodontal pathobionts. Here we report a potential mechanism to bolster oral commensal streptococcal H2O2 production by magnesium (Mg2+) supplementation. Magnesium is a cofactor for SpxB catalytic activity, and supplementation increases the production of H2O2 in vitro. We demonstrate that Mg2+ affects spxB transcription

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4

Ashby, Michael T., Jens Kreth, Muthu Soundarajan, and Laure Sita Sivuilu. "Influence of a model human defensive peroxidase system on oral streptococcal antagonism." Microbiology 155, no. 11 (2009): 3691–700. http://dx.doi.org/10.1099/mic.0.031310-0.

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Streptococcus is a dominant genus in the human oral cavity, making up about 20 % of the more than 800 species of bacteria that have been identified, and about 80 % of the early biofilm colonizers. Oral streptococci include both health-compatible (e.g. Streptococcus gordonii and Streptococcus sanguinis) and pathogenic strains (e.g. the cariogenic Streptococcus mutans). Because the streptococci have similar metabolic requirements, they have developed defence strategies that lead to antagonism (also known as bacterial interference). S. mutans expresses bacteriocins that are cytotoxic toward S. go

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5

Woo, Patrick CY, Jade LL Teng, Kit-wah Leung, et al. "Streptococcus sinensis may react with Lancefield group F antiserum." Journal of Medical Microbiology 53, no. 11 (2004): 1083–88. http://dx.doi.org/10.1099/jmm.0.45745-0.

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Lancefield group F streptococci have been found almost exclusively as members of the ‘Streptococcus milleri’ group, although they have been reported very occasionally in some other streptococcal species. Among 302 patients with bacteraemia caused by viridans streptococci over a 6-year period, three cases were caused by Streptococcus sinensis (type strain HKU4T, HKU5 and HKU6). All three patients had infective endocarditis complicating their underlying chronic rheumatic heart diseases. Gene sequencing showed no base differences between the 16S rRNA gene sequences of HKU5 and HKU6 and that of HK

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6

Nobbs, Angela H., Yongshu Zhang, Ali Khammanivong, and Mark C. Herzberg. "Streptococcus gordonii Hsa Environmentally Constrains Competitive Binding by Streptococcus sanguinis to Saliva-Coated Hydroxyapatite." Journal of Bacteriology 189, no. 8 (2007): 3106–14. http://dx.doi.org/10.1128/jb.01535-06.

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ABSTRACT Competition between pioneer colonizing bacteria may determine polymicrobial succession during dental plaque development, but the ecological constraints are poorly understood. For example, more Streptococcus sanguinis than Streptococcus gordonii organisms are consistently isolated from the same intraoral sites, yet S. gordonii fails to be excluded and survives as a species over time. To explain this observation, we hypothesized that S. gordonii could compete with S. sanguinis to adhere to saliva-coated hydroxyapatite (sHA), an in vitro model of the tooth surface. Both species bound sim

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7

Loimaranta, V., N. S. Jakubovics, J. Hytönen, J. Finne, H. F. Jenkinson, and N. Strömberg. "Fluid- or Surface-Phase Human Salivary Scavenger Protein gp340 Exposes Different Bacterial Recognition Properties." Infection and Immunity 73, no. 4 (2005): 2245–52. http://dx.doi.org/10.1128/iai.73.4.2245-2252.2005.

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ABSTRACT Salivary scavenger receptor cysteine-rich protein gp340 aggregates streptococci and other bacteria as part of the host innate defense system at mucosal surfaces. In this article, we have investigated the properties of fluid-phase gp340 and hydroxylapatite surface-adsorbed gp340 in aggregation and adherence, respectively, of viridans group streptococci (e.g., Streptococcus gordonii and Streptococcus mutans), non-viridans group streptococci (e.g., Streptococcus pyogenes and Streptococcus suis), and oral Actinomyces. Fluid-phase gp340 and surface-phase gp340 bioforms were differentially

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8

Wan, S. X., J. Tian, Y. Liu, A. Dhall, H. Koo, and G. Hwang. "Cross-Kingdom Cell-to-Cell Interactions in Cariogenic Biofilm Initiation." Journal of Dental Research 100, no. 1 (2020): 74–81. http://dx.doi.org/10.1177/0022034520950286.

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Candida albicans is known to form polymicrobial biofilms with various Streptococcus spp., including mitis and mutans group streptococci. Streptococcus gordonii (mitis group) has been shown to bind avidly to C. albicans hyphae via direct cell-to-cell interaction, while the cariogenic pathogen Streptococcus mutans (mutans group) interacts with the fungal cells via extracellular glucans. However, the biophysical properties of these cross-kingdom interactions at the single-cell level during the early stage of biofilm formation remain understudied. Here, we examined the binding forces between S. mu

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9

Mallaley, P. P., S. A. Halperin, A. Morris, A. MacMillan, and S. F. Lee. "Expression of a pertussis toxin S1 fragment by inducible promoters in oral Streptococcus and the induction of immune responses during oral colonization in mice." Canadian Journal of Microbiology 52, no. 5 (2006): 436–44. http://dx.doi.org/10.1139/w05-151.

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Previous work aimed at developing a live oral vaccine expressing pertussis toxin S1 fragment on the surface of the bacterium Streptococcus gordonii elicited a lower than expected antibody response, perhaps because of low antigen expression. In this study, in-frame promoter fusions were constructed to investigate whether an increase in antigen production by the streptococcal vaccine strain results in a better antibody response. The promoters tested were (i) the Streptococcus mutans sucrose-inducible fructosyltransferase (ftf) promoter and (ii) the Bacillus subtilis/Escherichia coli chimeric tet

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10

W S Harty, Derek. "Virulence factors in streptococcal infective endocarditis." Microbiology Australia 26, no. 3 (2005): 114. http://dx.doi.org/10.1071/ma05114.

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Infective endocarditis (IE) is a life threatening, endovascular infection occurring when bacteria enter the blood stream and adhere to heart valves. Mortality rates remain in the range of 11-27%. The most common infecting micro-organisms are now the staphylococci (44%) although streptococci (31%) and particularly the oral streptococci (21%) are still major causative agents. Many different oral streptococci have been isolated from IE cases, the most common being Streptococcus sanguinis, Streptococcus oralis, Streptococcus gordonii, Streptococcus mitis, Streptococcus anginosus group and mutans s

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11

Jakubovics, Nicholas S., Steven R. Gill, Stacey E. Iobst, M. M. Vickerman, and Paul E. Kolenbrander. "Regulation of Gene Expression in a Mixed-Genus Community: Stabilized Arginine Biosynthesis in Streptococcus gordonii by Coaggregation with Actinomyces naeslundii." Journal of Bacteriology 190, no. 10 (2008): 3646–57. http://dx.doi.org/10.1128/jb.00088-08.

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ABSTRACT Interactions involving genetically distinct bacteria, for example, between oral streptococci and actinomyces, are central to dental plaque development. A DNA microarray identified Streptococcus gordonii genes regulated in response to coaggregation with Actinomyces naeslundii. The expression of 23 genes changed >3-fold in coaggregates, including that of 9 genes involved in arginine biosynthesis and transport. The capacity of S. gordonii to synthesize arginine was assessed using a chemically defined growth medium. In monoculture, streptococcal arginine biosynthesis was inefficient an

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12

Hartini Benita, Haniya Diva Kurotul Aini, Prawati Nuraini, and Soegeng Wahluyo. "Inhibitory potential of turmeric extract (Curcuma domestica Val.) toward the growth of Streptococcus gordonii bacteria." World Journal of Advanced Research and Reviews 21, no. 1 (2024): 1515–19. http://dx.doi.org/10.30574/wjarr.2024.21.1.0011.

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Introduction: Dental caries is a disease caused by damage to the hard tissue of the teeth by the metabolic activity of bacteria, one of which is the cariogenic bacteria Streptococcus gordonii. Turmeric is one of the most popular spices in Asia with good antibacterial capabilities. Turmeric content such as curcumin can inhibit bacterial growth. Objective: To determine the potential inhibitory power of turmeric extract on the growth of Streptococcus gordonii. Method: The research is carried out using in vitro laboratory experimental analytical research with a posttest only control group design.

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13

Xu, Yifan, Andreas Itzek, and Jens Kreth. "Comparison of genes required for H2O2 resistance in Streptococcus gordonii and Streptococcus sanguinis." Microbiology 160, no. 12 (2014): 2627–38. http://dx.doi.org/10.1099/mic.0.082156-0.

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Hydrogen peroxide (H2O2) is produced by several members of the genus Streptococcus mainly through the pyruvate oxidase SpxB under aerobic growth conditions. The acute toxic nature of H2O2 raises the interesting question of how streptococci cope with intrinsically produced H2O2, which subsequently accumulates in the microenvironment and threatens the closely surrounding population. Here, we investigate the H2O2 susceptibility of oral Streptococcus gordonii and Streptococcus sanguinis and elucidate potential mechanisms of how they protect themselves from the deleterious effect of H2O2. Both orga

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14

Hartini, Benita, Diva Kurotul Aini Haniya, Nuraini Prawati, and Wahluyo Soegeng. "Inhibitory potential of turmeric extract (Curcuma domestica Val.) toward the growth of Streptococcus gordonii bacteria." World Journal of Advanced Research and Reviews 21, no. 1 (2024): 1515–19. https://doi.org/10.5281/zenodo.13323511.

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<strong>Introduction</strong>: Dental caries is a disease caused by damage to the hard tissue of the teeth by the metabolic activity of bacteria, one of which is the cariogenic bacteria <em>Streptococcus gordonii. </em>Turmeric is one of the most popular spices in Asia with good antibacterial capabilities. Turmeric content such as curcumin can inhibit bacterial growth. <strong>Objective</strong>: To determine the potential inhibitory power of turmeric extract on the growth of <em>Streptococcus gordonii</em>. <strong>Method</strong>: The research is carried out using in vitro lab

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15

Aspiras, Marcelo B., Karen M. Kazmerzak, Paul E. Kolenbrander, Roderick McNab, Neil Hardegen, and Howard F. Jenkinson. "Expression of Green Fluorescent Protein in Streptococcus gordonii DL1 and Its Use as a Species-Specific Marker in Coadhesion with Streptococcus oralis 34 in Saliva-Conditioned Biofilms In Vitro." Applied and Environmental Microbiology 66, no. 9 (2000): 4074–83. http://dx.doi.org/10.1128/aem.66.9.4074-4083.2000.

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ABSTRACT Streptococcus gordonii is one of the predominant streptococci in the biofilm ecology of the oral cavity. It interacts with other bacteria through receptor-adhesin complexes formed between cognate molecules on the surfaces of the partner cells. To study the spatial organization of S. gordonii DL1 in oral biofilms, we used green fluorescent protein (GFP) as a species-specific marker to identify S. gordonii in a two-species in vitro oral biofilm flowcell system. To drive expression of gfp, we isolated and characterized an endogenous S. gordonii promoter,PhppA, which is situated upstream

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16

Urano-Tashiro, Yumiko, Keitarou Saiki, Yuki Yamanaka, Yuiko Ishikawa, and Yukihiro Takahashi. "Streptococcus gordonii DL1 evades polymorphonuclear leukocyte-mediated killing via resistance to lysozyme." PLOS ONE 16, no. 12 (2021): e0261568. http://dx.doi.org/10.1371/journal.pone.0261568.

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Streptococcus gordonii is an etiological bacterial agent of infective endocarditis. Although the pathogenesis mechanisms are not well understood, the interaction between streptococci and phagocytes is considered important for the development of infective endocarditis. Previous studies show that some S. gordonii strains, including DL1, survive in polymorphonuclear leukocytes (PMNs), whereas other strains such as SK12 are sensitive to PMN-dependent killing. In this study, we assessed the differences between the sensitivity of S. gordonii DL1 and S. gordonii SK12 to PMN-dependent killing. S. gord

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17

Li, Hao, Chenguang Niu, Junyuan Luo, Zhengwei Huang, and Wei Zhou. "Anticariogenic Activity of Celastrol and Its Enhancement of Streptococcal Antagonism in Multispecies Biofilm." Antibiotics 12, no. 8 (2023): 1245. http://dx.doi.org/10.3390/antibiotics12081245.

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Dental caries is a chronic disease resulting from dysbiosis in the oral microbiome. Antagonism of commensal Streptococcus sanguinis and Streptococcus gordonii against cariogenic Streptococcus mutans is pivotal to keep the microecological balance. However, concerns are growing on antimicrobial agents in anticaries therapy, for broad spectrum antimicrobials may have a profound impact on the oral microbial community, especially on commensals. Here, we report celastrol, extracted from Traditional Chinese Medicine’s Tripterygium wilfordii (TW) plant, as a promising anticaries candidate. Our results

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18

Wang, Bing-Yan, and Howard K. Kuramitsu. "Interactions between Oral Bacteria: Inhibition of Streptococcus mutans Bacteriocin Production by Streptococcus gordonii." Applied and Environmental Microbiology 71, no. 1 (2005): 354–62. http://dx.doi.org/10.1128/aem.71.1.354-362.2005.

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ABSTRACT Streptococcus mutans has been recognized as an important etiological agent in human dental caries. Some strains of S. mutans also produce bacteriocins. In this study, we sought to demonstrate that bacteriocin production by S. mutans strains GS5 and BM71 was mediated by quorum sensing, which is dependent on a competence-stimulating peptide (CSP) signaling system encoded by the com genes. We also demonstrated that interactions with some other oral streptococci interfered with S. mutans bacteriocin production both in broth and in biofilms. The inhibition of S. mutans bacteriocin producti

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19

Huang, Xuelian, Christopher M. Browngardt, Min Jiang, Sang-Joon Ahn, Robert A. Burne, and Marcelle M. Nascimento. "Diversity in Antagonistic Interactions between Commensal Oral Streptococci and Streptococcus mutans." Caries Research 52, no. 1-2 (2017): 88–101. http://dx.doi.org/10.1159/000479091.

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Arginine metabolism via the arginine deiminase system (ADS) of oral bacteria generates ammonia, which can increase the pH of oral biofilms and decrease the risk for dental caries. Antagonistic interactions between ADS-positive and cariogenic bacteria in oral biofilms may be an important ecological determinant of caries. This study investigated the antagonistic potential and mechanisms of clinical isolates of arginolytic streptococci on and by Streptococcus mutans UA159, a well-characterized cariogenic human isolate. Low-passage isolates of Streptococcus gordonii, Streptococcus sanguinis, Strep

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20

Jakubovics, Nicholas S., Steven W. Kerrigan, Angela H. Nobbs, et al. "Functions of Cell Surface-Anchored Antigen I/II Family and Hsa Polypeptides in Interactions of Streptococcus gordonii with Host Receptors." Infection and Immunity 73, no. 10 (2005): 6629–38. http://dx.doi.org/10.1128/iai.73.10.6629-6638.2005.

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ABSTRACT Streptococcus gordonii colonizes multiple sites within the human oral cavity. This colonization depends upon the initial interactions of streptococcal adhesins with host receptors. The adhesins that bind salivary agglutinin glycoprotein (gp340) and human cell surface receptors include the antigen I/II (AgI/II) family polypeptides SspA and SspB and a sialic acid-binding surface protein designated Hsa or GspB. In this study we determined the relative functions of the AgI/II polypeptides and Hsa in interactions of S. gordonii DL1 (Challis) with host receptors. For an isogenic mutant with

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21

Drobni, Mirva, Tong Li, Carina Krüger, et al. "Host-Derived Pentapeptide Affecting Adhesion, Proliferation, and Local pH in Biofilm Communities Composed of Streptococcus and Actinomyces Species." Infection and Immunity 74, no. 11 (2006): 6293–99. http://dx.doi.org/10.1128/iai.00068-06.

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ABSTRACT Salivary proline-rich proteins (PRPs) attach commensal Actinomyces and Streptococcus species to teeth. Here, gel filtration, mass spectrometry and Edman degradation were applied to show the release of a pentapeptide, RGRPQ, from PRP-1 upon proteolysis by Streptococcus gordonii. Moreover, synthetic RGRPQ and derivatives were used to investigate associated innate properties and responsible motifs. The RGRPQ peptide increased 2.5-fold the growth rate of S. gordonii via a Q-dependent sequence motif and selectively stimulated oral colonization of this organism in a rat model in vivo. In co

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22

Chalmers, Natalia I., Robert J. Palmer, John O. Cisar, and Paul E. Kolenbrander. "Characterization of a Streptococcus sp.-Veillonella sp. Community Micromanipulated from Dental Plaque." Journal of Bacteriology 190, no. 24 (2008): 8145–54. http://dx.doi.org/10.1128/jb.00983-08.

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ABSTRACT Streptococci and veillonellae occur in mixed-species colonies during formation of early dental plaque. One factor hypothesized to be important in assembly of these initial communities is coaggregation (cell-cell recognition by genetically distinct bacteria). Intrageneric coaggregation of streptococci occurs when a lectin-like adhesin on one streptococcal species recognizes a receptor polysaccharide (RPS) on the partner species. Veillonellae also coaggregate with streptococci. These genera interact metabolically; lactic acid produced by streptococci is a carbon source for veillonellae.

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23

Zhang, Michael, Lifang Yan, Guan Zhu, Michael Holifield, Donna Todd, and Shuping Zhang. "Streptococcus troglodytidis sp. nov., isolated from a foot abscess of a chimpanzee (Pan troglodytes)." International Journal of Systematic and Evolutionary Microbiology 63, Pt_2 (2013): 449–53. http://dx.doi.org/10.1099/ijs.0.038133-0.

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A facultative anaerobic, non-motile, non-spore-forming, Gram-positive-staining, coccus-shaped bacterium was isolated from an abscess on the right foot of a chimpanzee (Pan troglodytes). The colonies were β-haemolytic. Catalase and oxidase activities were negative. The Lancefield group B antigen was expressed. On the basis of morphological and biochemical characteristics, the bacterium was tentatively identified as a streptococcal species. 16S rRNA gene sequence analysis indicated that the bacterium shared 96.7 %, 96.4 %, 96.1 %, 95.8 % and 95.7 % sequence similarities with Streptococcus gordon

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24

Kerrigan, Steven W., Nick S. Jakubouvics, Gerardene Meade, Howard F. Jenkinson та Dermot M. Cox. "A Novel GPIbα Binding Protein on Streptococcus Gordonii Induces Platelet Rolling at Low Shear." Blood 104, № 11 (2004): 3663. http://dx.doi.org/10.1182/blood.v104.11.3663.3663.

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Abstract Infective endocarditis is associated with considerable morbidity and mortality and oral Streptococci are the priniciple causative organism. Platelet adhesion and subsequent aggregation play a critical role in the pathogenesis and dissemination of the infective process. The mechanism by which S. gordonii interacts with and subsequently leads to platelet activation is currently unknown. Previously we described the ability of Streptococcus sanguis to induce platelet aggregation via the platelet vonWillebrand factor receptor, GPIbα, however identification of the bacterial protein involved

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25

Egland, Paul G., Laurence D. Dû, and Paul E. Kolenbrander. "Identification of Independent Streptococcus gordonii SspA and SspB Functions in Coaggregation withActinomyces naeslundii." Infection and Immunity 69, no. 12 (2001): 7512–16. http://dx.doi.org/10.1128/iai.69.12.7512-7516.2001.

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ABSTRACT The initial stages of dental plaque formation involve the adherence of early colonizing organisms such as Streptococcus gordonii and Actinomyces naeslundii to the saliva-coated tooth surface and to each other. The S. gordonii surface proteins SspA and SspB are known to play a role in adherence to salivary proteins and mediate coaggregation with other bacteria. Coaggregation is the adhesin receptor-mediated interaction between genetically distinct cell types and appears to be ubiquitous among oral isolates. To define the function of SspA and SspB separately on the surface of their natu

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26

Bamford, Caroline V., Anita d'Mello, Angela H. Nobbs, Lindsay C. Dutton, M. Margaret Vickerman, and Howard F. Jenkinson. "Streptococcus gordonii Modulates Candida albicans Biofilm Formation through Intergeneric Communication." Infection and Immunity 77, no. 9 (2009): 3696–704. http://dx.doi.org/10.1128/iai.00438-09.

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ABSTRACT The fungus Candida albicans colonizes human oral cavity surfaces in conjunction with a complex microflora. C. albicans SC5314 formed biofilms on saliva-coated surfaces that in early stages of development consisted of ∼30% hyphal forms. In mixed biofilms with the oral bacterium Streptococcus gordonii DL1, hyphal development by C. albicans was enhanced so that biofilms consisted of ∼60% hyphal forms. Cell-cell contact between S. gordonii and C. albicans involved Streptococcus cell wall-anchored proteins SspA and SspB (antigen I/II family polypeptides). Repression of C. albicans hyphal f

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27

Charfo M, Afendi L, Belmalyani R, Errami A, Haboub M, and Drighil A. "Streptococcus gordonii: A Rare Cause of Infective Endocarditis with High Embolic Potential Revealed by Febrile Ischemic Stroke." Cardiology and Angiology: An International Journal 13, no. 1 (2024): 12–17. http://dx.doi.org/10.9734/ca/2024/v13i1388.

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Infective endocarditis is a relatively rare disease which, despite today's advances in diagnosis and treatment, is still associated with a high morbidity and mortality rate. Staphylococci and streptococci head the list of causative organisms. Few cases of Streptococcus gordonii endocarditis have been reported in the literature. We report the case of a 34-year-old man with no previous history of S. gordonii IE, responsible for multiple systemic embolisms in addition to valvular lesions.

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28

Love, Robert M., Malcolm D. McMillan, Yoonsuk Park, and Howard F. Jenkinson. "Coinvasion of Dentinal Tubules byPorphyromonas gingivalis and Streptococcus gordonii Depends upon Binding Specificity of Streptococcal Antigen I/II Adhesin." Infection and Immunity 68, no. 3 (2000): 1359–65. http://dx.doi.org/10.1128/iai.68.3.1359-1365.2000.

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ABSTRACT Cell wall-anchored polypeptides of the antigen I/II family are produced by many species of oral streptococci. These proteins mediate adhesion of streptococci to salivary glycoproteins and to other oral microorganisms and promote binding of cells to collagen type I and invasion of dentinal tubules. Since infections of the root canal system have a mixed anaerobic bacterial etiology, we investigated the hypothesis that coadhesion of anaerobic bacteria with streptococci may facilitate invasive endodontic disease. Porphyromonas gingivalis ATCC 33277 cells were able to invade dentinal tubul

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29

Jakubovics, Nicholas S., Jane L. Brittan, Lindsay C. Dutton, and Howard F. Jenkinson. "Multiple adhesin proteins on the cell surface of Streptococcus gordonii are involved in adhesion to human fibronectin." Microbiology 155, no. 11 (2009): 3572–80. http://dx.doi.org/10.1099/mic.0.032078-0.

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Adhesion of bacterial cells to fibronectin (FN) is thought to be a pivotal step in the pathogenesis of invasive infectious diseases. Viridans group streptococci such as Streptococcus gordonii are considered commensal members of the oral microflora, but are important pathogens in infective endocarditis. S. gordonii expresses a battery of cell-surface adhesins that act alone or in concert to bind host receptors. Here, we employed molecular genetic approaches to determine the relative contributions of five known S. gordonii surface proteins to adherence to human FN. Binding levels to FN by isogen

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30

Karaaslan, Fatih, Turgut Demir, and Ozlem Barış. "Effect of Periodontal Disease-associated Bacteria on the Formation of Dental Calculus: An In Vitro Study." Journal of Advanced Oral Research 11, no. 2 (2020): 165–71. http://dx.doi.org/10.1177/2320206820919591.

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Aim: To investigate whether bacteria that play a major role in periodontal disease pathology and in the formation of dental plaque also affect the formation of dental calculus, which is a predisposing factor for the initiation and progression of periodontal diseases. Materials and Methods: This was an in vitro study, and cultures of bacteria were obtained from the American Type Culture Collection and Department of Biology, Faculty of Science, Atatürk University. Young cultures of bacteria of Streptococcus mutans ( S. mutans), Streptococcus sanguinis ( S. sanguinis), Streptococcus gordonii ( S.

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31

Al-Ahmad, Ali, Thorsten Mathias Auschill, Gabriele Braun, Elmar Hellwig, and Nicole Birgit Arweiler. "Overestimation of Streptococcus mutans prevalence by nested PCR detection of the 16S rRNA gene." Journal of Medical Microbiology 55, no. 1 (2006): 109–13. http://dx.doi.org/10.1099/jmm.0.46280-0.

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This study was carried out in order to compare two PCR-based methods in the detection of Streptococcus mutans. The first PCR method was based on primers for the 16S rRNA gene and the second method was based on specific primers that targeted the glucosyltransferase gene (gtfB). Each PCR was performed with eight different streptococci from the viridans group, five other streptococci and 17 different non-streptococcal bacterial strains. Direct use of the S. mutans 16S rRNA gene-specific primers revealed that Streptococcus gordonii and Streptococcus infantis were also detected. After amplifying th

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32

Hamada, Tomoyuki, Masatsugu Kawashima, Haruo Watanabe, Junji Tagami, and Hidenobu Senpuku. "Molecular Interactions of Surface Protein Peptides of Streptococcus gordonii with Human Salivary Components." Infection and Immunity 72, no. 8 (2004): 4819–26. http://dx.doi.org/10.1128/iai.72.8.4819-4826.2004.

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ABSTRACT Oral streptococci play a large role in dental biofilm formation, and several types interact as early colonizers with the enamel salivary pellicle to form the primary biofilm, as well as to incorporate other bacteria on tooth surfaces. Interactions of surface molecules of individual streptococci with the salivary pellicle on the tooth surface have an influence on the etiological properties of an oral biofilm. To elucidate the molecular interactions of streptococci with salivary components, binding between surface protein (SspB and PAg) peptides of Streptococcus gordonii and Streptococc

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Grönroos, L., M. Saarela, J. Mättö, U. Tanner-Salo, A. Vuorela, and S. Alaluusua. "Mutacin Production by Streptococcus mutans May Promote Transmission of Bacteria from Mother to Child." Infection and Immunity 66, no. 6 (1998): 2595–600. http://dx.doi.org/10.1128/iai.66.6.2595-2600.1998.

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ABSTRACT The production of bacteriocin-like inhibitory substances, mutacins, by mutans streptococci varies among isolates. To find if the degree of mutacin activity of an isolate was related to its transmission between mother and her child, 19 mothers and their 18-month- to 3-year-old children were sampled for their oral mutans streptococci. In addition, the stability of mutacin activity was studied with isolates from the mothers and with isolates from five unrelated 5-year-old children in 5- to 7-year follow-up studies. A total of 145 oral mutans streptococcal isolates were serotyped by immun

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Fujiki, Jumpei, Shin-ichi Yoshida, Tomohiro Nakamura та ін. "Novel Virulent Bacteriophage ΦSG005, Which Infects Streptococcus gordonii, Forms a Distinct Clade among Streptococcus Viruses". Viruses 13, № 10 (2021): 1964. http://dx.doi.org/10.3390/v13101964.

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Bacteriophages are viruses that specifically infect bacteria and are classified as either virulent phages or temperate phages. Despite virulent phages being promising antimicrobial agents due to their bactericidal effects, the implementation of phage therapy depends on the availability of virulent phages against target bacteria. Notably, virulent phages of Streptococcus gordonii, which resides in the oral cavity and is an opportunistic pathogen that can cause periodontitis and endocarditis have previously never been found. We thus attempted to isolate virulent phages against S. gordonii. In th

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Warren, Travis K., S. Amanda Lund, Kevin F. Jones, and Dennis E. Hruby. "Comparison of transformation protocols in Streptococcus gordonii and evaluation of native promoter strength using a multiple-copy plasmid." Canadian Journal of Microbiology 53, no. 3 (2007): 417–26. http://dx.doi.org/10.1139/w07-004.

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An active area of research in the development of Streptococcus gordonii for use as a bacterial commensal vector involves the identification and utilization of strong promoters for high-level expression of heterologous products. Escherichia coli plasmid vectors containing different streptococcal promoters often fail to become established in E. coli for unknown reasons. Therefore, it is desirable at times to transform S. gordonii, which is naturally competent, with small quantities of nascently ligated DNA without using E. coli first to amplify or screen the product. By comparing the efficiency

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Kuang, Xinyi, Tao Yang, Chenzi Zhang, et al. "Repurposing Napabucasin as an Antimicrobial Agent against Oral Streptococcal Biofilms." BioMed Research International 2020 (November 20, 2020): 1–9. http://dx.doi.org/10.1155/2020/8379526.

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Objectives. Disruption of microbial biofilms is an effective way to control dental caries. Drug resistance and side effects of the existing antimicrobials necessitate the development of novel antibacterial agents. The current study was aimed at investigating the antibacterial activities of the repurposed natural compound napabucasin against oral streptococci. Methods. The minimum inhibitory concentration, minimum bactericidal concentration, minimum biofilm inhibition concentration, and minimum biofilm reduction concentration of Streptococcus mutans, Streptococcus gordonii, and Streptococcus sa

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Lee, Song F., Yi-Jing Li, and Scott A. Halperin. "Overcoming codon-usage bias in heterologous protein expression in Streptococcus gordonii." Microbiology 155, no. 11 (2009): 3581–88. http://dx.doi.org/10.1099/mic.0.030064-0.

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One of the limitations facing the development of Streptococcus gordonii into a successful vaccine vector is the inability of this bacterium to express high levels of heterologous proteins. In the present study, we have identified 12 codons deemed as rare codons in S. gordonii and seven other streptococcal species. tRNA genes encoding 10 of the 12 rare codons were cloned into a plasmid. The plasmid was transformed into strains of S. gordonii expressing the fusion protein SpaP/S1, the anti-complement receptor 1 (CR1) single-chain variable fragment (scFv) antibody, or the Toxoplasma gondii cyclop

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da Silva, Rafael Amaral, Jéssica Lourençon Dubois, Lucas Laion da S. Oliveira, et al. "Human Serum Modulates Biofilm Formation By Strains Of Viridans Group Streptococcus Associated With Infective Endocarditis." Journal of Clinical Microbiology 10, no. 1 (2025): 1–11. https://doi.org/10.52338/tjocmb.2025.4630.

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Oral Streptococcus spp. are among the most frequent bacteria associated with infective endocarditis (IE), forming biofilms on cardiac tissues. This study aimed to evaluate the contribution of serum components to the capacity of strains of oral streptococci associated with IE to form biofilms. To this end, biofilm phenotypes were determined in eight bacterial strains isolated from the bloodstream of patients with IE, which were taxonomically identified using PCR with species-specific primers as Streptococcus sanguinis (n=2), Streptococcus gordonii (n=3) or Streptococcus salivarius (n=2). Refere

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Liu, Jinman, Chenggang Wu, I.-Hsiu Huang, Justin Merritt, and Fengxia Qi. "Differential response of Streptococcus mutans towards friend and foe in mixed-species cultures." Microbiology 157, no. 9 (2011): 2433–44. http://dx.doi.org/10.1099/mic.0.048314-0.

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In the oral biofilm, the ‘mitis’ streptococci are among the first group of organisms to colonize the tooth surface. Their proliferation is thought to be an important factor required for antagonizing the growth of cariogenic species such as Streptococcus mutans. In this study, we used a three-species mixed culture to demonstrate that another ubiquitous early colonizing species, Veillonella parvula, can greatly affect the outcome of the competition between a pair of antagonists such as S. mutans and Streptococcus gordonii. Transcriptome analysis further revealed that S. mutans responds different

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Vriesema, Aldwin J. M., Jacob Dankert, and Sebastian A. J. Zaat. "A Shift from Oral to Blood pH Is a Stimulus for Adaptive Gene Expression of Streptococcus gordonii CH1 and Induces Protection against Oxidative Stress and Enhanced Bacterial Growth by Expression of msrA." Infection and Immunity 68, no. 3 (2000): 1061–68. http://dx.doi.org/10.1128/iai.68.3.1061-1068.2000.

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ABSTRACT Viridans group streptococci (VS) from the oral cavity entering the bloodstream may initiate infective endocarditis (IE). We aimed to identify genes expressed in response to a pH increase from slightly acidic (pH 6.2) to neutral (pH 7.3) as encountered by VS entering the bloodstream from the oral cavity. Using a recently developed promoter-screening vector, we isolated five promoter fragments from the genomic DNA of Streptococcus gordonii CH1 responding to this stimulus. No common regulatory sequences were identified in these promoter fragments that could account for the coordinate exp

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Ahn, S. J., H. S. Kho, S. W. Lee, and D. S. Nahm. "Roles of Salivary Proteins in the Adherence of Oral Streptococci to Various Orthodontic Brackets." Journal of Dental Research 81, no. 6 (2002): 411–15. http://dx.doi.org/10.1177/154405910208100611.

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Knowledge of salivary pellicles on orthodontic brackets provides a better understanding of microbial adherence. The aim of this study was to analyze the effects of bracket pellicles on the adherence of Streptococcus gordonii and Streptococcus mutans. Bracket pellicles were formed by the incubation of 4 kinds of orthodontic brackets with unstimulated whole saliva for 2 hrs, and analyzed by electrophoresis, immunodetection, and amino acid analysis. Binding assays were then performed by the incubation of tritium-labeled streptococci with the pellicle-transfer blots and orthodontic brackets. The r

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Kreth, Jens, Hung Vu, Yongshu Zhang, and Mark C. Herzberg. "Characterization of Hydrogen Peroxide-Induced DNA Release by Streptococcus sanguinis and Streptococcus gordonii." Journal of Bacteriology 191, no. 20 (2009): 6281–91. http://dx.doi.org/10.1128/jb.00906-09.

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ABSTRACT Extracellular DNA (eDNA) is produced by several bacterial species and appears to contribute to biofilm development and cell-cell adhesion. We present data showing that the oral commensals Streptococcus sanguinis and Streptococcus gordonii release DNA in a process induced by pyruvate oxidase-dependent production of hydrogen peroxide (H2O2). Surprisingly, S. sanguinis and S. gordonii cell integrity appears unaffected by conditions that cause autolysis in other eDNA-producing bacteria. Exogenous H2O2 causes release of DNA from S. sanguinis and S. gordonii but does not result in obvious l

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Vickerman, M. M., S. E. Flannagan, A. M. Jesionowski, K. A. Brossard, D. B. Clewell, and C. M. Sedgley. "A Genetic Determinant in Streptococcus gordonii Challis Encodes a Peptide with Activity Similar to That of Enterococcal Sex Pheromone cAM373, Which Facilitates Intergeneric DNA Transfer." Journal of Bacteriology 192, no. 10 (2010): 2535–45. http://dx.doi.org/10.1128/jb.01689-09.

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ABSTRACT Enterococcus faecalis strains secrete multiple peptides representing different sex pheromones that induce mating responses by bacteria carrying specific conjugative plasmids. The pheromone cAM373, which induces a response by the enterococcal plasmid pAM373, has been of interest because a similar activity is also secreted by Streptococcus gordonii and Staphylococcus aureus. The potential to facilitate intergeneric DNA transfer from E. faecalis is of concern because of extensive multiple antibiotic resistance, including vancomycin resistance, that has emerged among enterococci in recent

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Marquez, Ana Karen Lopez, Irene Meester, Johnny Rylander Yamada, et al. "Streptococcus gordonii: An updated review." International Journal of Applied Dental Sciences 9, no. 1 (2023): 80–83. http://dx.doi.org/10.22271/oral.2023.v9.i1b.1658.

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Baca, Katia, Hebert Puente, Franco González, Katherine Leyva, Bruno Rodriguez, and Félix Medina. "Endocarditis infecciosa secundaria a Streptococcus gordonii, complicada con aneurisma y fístula en válvula mitral. Reporte de caso." Revista Medica Herediana 28, no. 1 (2017): 37. http://dx.doi.org/10.20453/rmh.v28i1.3072.

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Entre las bacterias poco comunes que causan Endocarditis infecciosa (EI), se encuentran el Streptococcus gordonii, conocido por su habilidad de colonizar y dañar las válvulas cardiacas. Asimismo, se conoce que el hallazgo de aneurisma complicado con fístula intracardiaca es infrecuente en EI, sólo se presenta en el 1,6% de pacientes. Se reporta el caso de un varón de 58 años con EI por Streptococcus gordonii complicada con aneurisma y fístula en la válvula mitral.

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Young Lee, Si, John O. Cisar, Joseph L. Bryant, Michael A. Eckhaus, and Ann L. Sandberg. "Resistance of Streptococcus gordonii to Polymorphonuclear Leukocyte Killing Is a Potential Virulence Determinant of Infective Endocarditis." Infection and Immunity 74, no. 6 (2006): 3148–55. http://dx.doi.org/10.1128/iai.00087-06.

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ABSTRACT Significant differences in virulence among seven representative Streptococcus gordonii strains were observed by using the rat model of infective endocarditis. Five strains, including S. gordonii DL1, caused severe disease, while the other two strains, including S. gordonii SK12, caused minimal or no disease. The differences in virulence were evident from the visible presence of streptococci in the vegetations present on the aortic valves of catheterized rats that were challenged with individual strains and also from the much greater recovery of rifampin-resistant S. gordonii DLl than

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Pellerin, Geneviève, Laurent Bazinet, and Daniel Grenier. "Deacidification of Cranberry Juice Reduces Its Antibacterial Properties against Oral Streptococci but Preserves Barrier Function and Attenuates the Inflammatory Response of Oral Epithelial Cells." Foods 10, no. 7 (2021): 1634. http://dx.doi.org/10.3390/foods10071634.

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Cranberry (Vaccinium macrocarpon) may be a potent natural adjuvant for the prevention of oral diseases due to its anti-adherence, anti-cariogenic, and anti-inflammatory properties. However, the high titrable acidity of cranberry juice (CJ) has been reported to cause gastrointestinal discomfort, leading consumers to restrict their intake of this beverage. Electrodialysis with a bipolar membrane (EDBM) can reduce the organic acid content of CJ while retaining the flavonoids associated with potential health benefits. This study aimed to assess how the deacidification of CJ by EDBM impacts the ant

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Park, Ok-Jin, Yeongkag Kwon, Chaeyeon Park, et al. "Streptococcus gordonii: Pathogenesis and Host Response to Its Cell Wall Components." Microorganisms 8, no. 12 (2020): 1852. http://dx.doi.org/10.3390/microorganisms8121852.

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Streptococcus gordonii, a Gram-positive bacterium, is a commensal bacterium that is commonly found in the skin, oral cavity, and intestine. It is also known as an opportunistic pathogen that can cause local or systemic diseases, such as apical periodontitis and infective endocarditis. S. gordonii, an early colonizer, easily attaches to host tissues, including tooth surfaces and heart valves, forming biofilms. S. gordonii penetrates into root canals and blood streams, subsequently interacting with various host immune and non-immune cells. The cell wall components of S. gordonii, which include l

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Fujiwara, Taku, Tomonori Hoshino, Takashi Ooshima, Shizuo Sobue, and Shigeyuki Hamada. "Purification, Characterization, and Molecular Analysis of the Gene Encoding Glucosyltransferase fromStreptococcus oralis." Infection and Immunity 68, no. 5 (2000): 2475–83. http://dx.doi.org/10.1128/iai.68.5.2475-2483.2000.

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ABSTRACT Streptococcus oralis is a member of the oral streptococcal family and an early-colonizing microorganism in the oral cavity of humans. S. oralis is known to produce glucosyltransferase (GTase), which synthesizes glucans from sucrose. The enzyme was purified chromatographically from a culture supernatant of S. oralis ATCC 10557. The purified enzyme, GTase-R, had a molecular mass of 173 kDa and a pI of 6.3. This enzyme mainly synthesized water-soluble glucans with no primer dependency. The addition of GTase markedly enhanced the sucrose-dependent resting cell adhesion of Streptococcus mu

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Zhang, Yongshu, Marvin Whiteley, Jens Kreth, et al. "The two-component system BfrAB regulates expression of ABC transporters in Streptococcus gordonii and Streptococcus sanguinis." Microbiology 155, no. 1 (2009): 165–73. http://dx.doi.org/10.1099/mic.0.023168-0.

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The putative two-component system BfrAB is involved in Streptococcus gordonii biofilm development. Here, we provide evidence that BfrAB regulates the expression of bfrCD and bfrEFG, which encode two ATP-binding cassette (ABC) transporters, and bfrH, which encodes a CAAX amino-terminal protease family protein. BfrC and BfrE are ATP-binding proteins, and BfrD, BfrF and BfrG are homologous membrane-spanning polypeptides. Similarly, BfrABss, the BfrAB homologous system in Streptococcus sanguinis, controls the expression of two bfrCD-homologous operons (bfrCD ss and bfrXY ss), a bfrH-homologous gen

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