Treponema medium glycoconjugate inhibits activation of human gingival fibroblasts stimulated with phenol-water extracts of periodontopathic bacteria.
Oral treponemes are well-known as causative agents of periodontal diseases; however, the details have not been fully clarified. Here, we examined the effects of Treponema medium glycoconjugate on the activation of human gingival fibroblasts using phenol-water extracts from Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum subsp. nucleatum, and Actinobacillus actinomycetemcomitans. The phenol-water extracts activated human gingival fibroblasts to mediate IL-8 production, as well as IL-8 mRNA expression, phosphorylation of p38 mitogen-activated protein kinase, and expression of intercellular adhesion molecule-1. T. medium glycoconjugate exhibited no activation of human gingival fibroblasts, while phenol-water extract-induced activation of human gingival fibroblasts was clearly inhibited by T. medium glycoconjugate. Furthermore, binding of biotinylated phenol-water extracts to CD14 in the presence of LPS-binding protein was blocked with T. medium glycoconjugate. These results suggest that T. medium glycoconjugate has an inhibitory effect on host cell activation by periodontopathic bacteria caused by binding to CD14- and LPS-binding protein.
Asai
Y
Y
Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan.
Ohyama
Y
Y
Taiji
Y
Y
Makimura
Y
Y
Tamai
R
R
Hashimoto
M
M
Ogawa
T
T
D000209:Acute-Phase Proteins / Q000276:immunology; D016976:Aggregatibacter actinomycetemcomitans / Q000502:physiology; D002352:Carrier Proteins / Q000276:immunology; D002457:Cell Extracts / Q000494:pharmacology*; D002478:Cells, Cultured; D005347:Fibroblasts / Q000187:drug effects* / Q000276:immunology; D016967:Fusobacterium nucleatum / Q000502:physiology; D005881:Gingiva / Q000166:cytology / Q000187:drug effects* / Q000276:immunology; D006001:Glycoconjugates / Q000494:pharmacology*; D006090:Gram-Negative Bacteria / Q000502:physiology*; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D016209:Interleukin-8 / Q000096:biosynthesis; D018950:Lipopolysaccharide Receptors / Q000276:immunology; D008070:Lipopolysaccharides / Q000276:immunology; D008562:Membrane Glycoproteins / Q000276:immunology; D010510:Periodontal Diseases / Q000382:microbiology*; D010636:Phenols; D010766:Phosphorylation; D016966:Porphyromonas gingivalis / Q000502:physiology; D018713:Prevotella intermedia / Q000502:physiology; D014208:Treponema / Q000276:immunology / Q000502:physiology*; D014867:Water; D048051:p38 Mitogen-Activated Protein Kinases / Q000378:metabolism; D000099231:Lipopolysaccharide-Binding Protein
D000209:Acute-Phase Proteins; D002352:Carrier Proteins; D002457:Cell Extracts; D006001:Glycoconjugates; D018799:Intercellular Adhesion Molecule-1; D016209:Interleukin-8; D018950:Lipopolysaccharide Receptors; D008070:Lipopolysaccharides; D008562:Membrane Glycoproteins; D010636:Phenols; D014867:Water; D048051:p38 Mitogen-Activated Protein Kinases; D000099231:Lipopolysaccharide-Binding Protein