2005 Fiscal Year Final Research Report Summary
Induction of inflammatory immune response by streptococcal water-insoluble α-glucans and association with periodontal diseases
| Project/Area Number |
16591824
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Morphological basic dentistry
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| Research Institution | Fukuoka Dental College |
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Principal Investigator |
OKAMOTO Shigefumi Fukuoka Dental College, Faculty of Dentistry, Lecturer, 歯学部, 講師 (50311759)
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| Co-Investigator(Kenkyū-buntansha) |
KAWABATA Shigetada Osaka University, Graduate School of Dentistry, Associate Professor, 大学院・歯学研究科, 助教授 (50273694)
NAKAGAWA Ichiro Osaka University, Graduate School of Dentistry, Assistant Professor, 大学院・歯学研究科, 講師 (70294113)
HAMADA Shigeyuki Nihon University, Advanced Research Institute for the Sciences and Humanities, Professor, 大学院・総合科学研究科, 教授 (60028777)
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| Project Period (FY) |
2004 – 2005
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| Keywords | Steptococcus sobrinus / water-insoluble α-glucans / inflammatory immune responses / periodontal diseases / 遊走能 / 活性酸素 |
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| Research Abstract |
Water-insoluble α-glucans (WIG) are synthesized from sucrose by the glucosyltransferase-I of mutans streptococci, that play an important role in the development of dental plaque. We found that WIG synthesized by Streptococcus sobrinus activated mouse peritoneal exudate macrophages to produce cytokines. The immunological responses were not due to contamination by sucrose, water-soluble glucan, lipopolysaccharide, or peptidoglycan. WIG stimulated human monocytes to produce TNF-α and IL-8. Human polymorphonuclear cells were also activated by WIG, resulting in chemotaxis of the cells and production of hydrogen peroxide. These results suggest that WIG modulate macrophage- and granulocyte-induced inflammatory immune responses. Furthermore, since WIG injured human oral squamous cells directly, we speculate that oral squamous cell injury and inflammation induced by α-glucans are associated with the development of periodontal diseases.
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Research Products
(8 results)
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[Journal Article] The Streptococcus pyogenes capsule is required for adhesion of bacteria to virus-infected alveolar epithelial cells and lethal bacterial-viral superinfection.2004
Author(s)
Okamoto, S., Kawabata, S., Terao, Y., Fujitaka, H., Okuno, Y., Hamada,S.
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Journal Title
Infection and Immunity 72.10
Pages: 6068-6075
Description
「研究成果報告書概要(和文)」より
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[Journal Article] The Streptococcus pyogenes capsule is required for adhesion of bacteria to virus-infected alveolar epithelial cells and lethal bacterial-viral superinfection.2004
Author(s)
Okamoto, S., Kawabata, S., Terao, Y., Fujitaka, H., Okuno, Y., Hamada, S.
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Journal Title
Infection and Immunity 72
Pages: 6068-6075
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A model of invasive type of Streptococcus pyogenes infection after intranasal infection in influenza A virus.2004
Author(s)
Okamoto, S., Kawabata, S., Nakagawa, I., Okuno, Y., Goto, T., Sano, K., Hamada, S.
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Journal Title
International Congress Series 163
Pages: 733-736
Description
「研究成果報告書概要(欧文)」より
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