Pathogenicity of hydrogen peroxide produced by oral streptococci
Project/Area Number |
26463112
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Orthodontics/Pediatric dentistry
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Research Institution | Osaka University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
中田 匡宣 大阪大学, 歯学研究科, 准教授 (90444497)
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Co-Investigator(Renkei-kenkyūsha) |
KUWATA Hirotaka 昭和大学, 歯学部, 教授 (60380523)
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
Keywords | ミティス群口腔レンサ球菌 / 過酸化水素 / マクロファージ / 細胞死 / リソソーム / 好中球 / 口腔レンサ球菌 / 細胞内オルガネラ |
Outline of Final Research Achievements |
Members of the oral mitis group streptococci are dominant colonizers of dental plaque, and causative agents of infective endocarditis. In the present study, we found that these streptococci produce hydrogen peroxide (H2O2), which is cytotoxic to human macrophages and neutrophils. The cytotoxic effect seemed to be independent of inflammatory responses, because H2O2 was not a potent stimulator of inflammatory cytokines such as TNF-a in macrophages. Our study reveals that streptococcal H2O2 plays as a cytotoxin, and is implicated in the evasion of these streptococci from host defense system by inducing cell death of innate immune cells.
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Report
(4 results)
Research Products
(26 results)
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[Journal Article] Microarray analysis of macrophage response to infection with Streptococcus oralis reveals the immunosuppressive effect of hydrogen peroxide2017
Author(s)
H. Matsushima, Y. Kumagai, A. Vandenbon, H. Kataoka, M. Kadena, H. Fukamachi, T. Arimoto, H. Morisaki, N. Fujiwara, N. Okahashi, and H. Kuwata
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Journal Title
Biochem. Biophys. Res. Commun.
Volume: 485(2)
Issue: 2
Pages: 461-467
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Streptococcus sanguinis induces neutrophil cell death by production of hydrogen peroxide.2017
Author(s)
Sumioka, R., Nakata, M., Okahashi, N., Li, Y., Wada, S., Yamaguchi, M., Sumitomo, T., Hayashi, M., Kawabata, S.
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Journal Title
PLoS One
Volume: 12
Issue: 2
Pages: e0172223-e0172223
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Evolutionary inactivation of a sialidase ingroup B Streptococcus.2016
Author(s)
Yamaguchi, M., Hirose, Y., Nakata, M., Uchiyama, S., Yamaguchi, Y., Goto, K., Sumitomo, T., Lewis, A., Kawabata, S., Nizet, V.
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Journal Title
Scientific Reports
Volume: 6
Issue: 1
Pages: 28852-28852
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Enzymatically active extracellular hyaluronidase (HylA) of group A Streptococcus promotes intracellular survival and virulence.2014
Author(s)
Yamaguchi M, Yamaguchi Y, Nakata M, Henningham A, Olson J, Dahesh S, Cole J, Kawabata S, Varki A, Nizet V.
Organizer
SFG and JSCR 2014 Joint Annual Meeting
Place of Presentation
Honolulu, HI, USA
Year and Date
2014-11-16 – 2014-11-19
Related Report
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