Infection by oral mitis group streptococci induces impairment of mast cell function and allergic response
Project/Area Number |
17K11958
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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 鹿児島大学, 医歯学域歯学系, 教授 (90444497)
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Project Period (FY) |
2017-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | 口腔レンサ球菌 / マスト細胞 / アレルギー / 細胞死 / 過酸化水素 |
Outline of Final Research Achievements |
Mast cells play central roles in allergic reaction. In this study, we found that H2O2 produced by mitis group streptococci such as Streptococcus oralis reduced degranulation of mast cells stimulated with IgE-antigen complex. The reduction of the degranulation was related to the H2O2-induced cell death. Lysosomal dysfunction by H2O2 seemed to contribute to the unique cell death. Using mouse model of pollen allergy, we found that streptococcus-derived H2O2 reduced the sneezing of the sensitized mice challenged with cedar pollen. These results suggest that H2O2 produced by the oral mitis group streptococci is able to disrupt the host allergic reaction.
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Academic Significance and Societal Importance of the Research Achievements |
口腔ミティス群レンサ球菌が産生する低濃度の過酸化水素が宿主の免疫応答やアレルギー応答に影響を与える可能性が示された.口腔常在細菌の代謝産物にそのような作用があることは従来全く想定されておらず、常在細菌が宿主に与える影響を考え直す必要があるのではないかと思われる.
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Report
(5 results)
Research Products
(34 results)
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[Journal Article] Allergic conversion of protective mucosal immunity against nasal bacteria in patients with chronic rhinosinusitis with nasal polyposis.2019
Author(s)
Takeda K, Sakakibara S, Yamashita K, Motooka D, Nakamura S, El Hussien MA, Katayama J, Maeda Y, Nakata M, Hamada S, Standley DM, Hayama M, Shikina T, Inohara H, Kikutani H.
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Journal Title
J Allergy Clin Immunol
Volume: 143
Issue: 3
Pages: 1163-1175
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Streptococcus sanguinis non-coding csRNAs negatively regulate expression of type IV pilus retraction ATPase PilT and biofilm formation2018
Author(s)
Ota C, Morisaki H, Nakata M, Arimoto T, Fukamachi H, Kataoka H, Masuda Y, Suzuki N, Miyazaki T, Okahashi N, Kuwata H
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Journal Title
Infect Immun
Volume: 86
Issue: 3
Pages: 1-13
DOI
Related Report
Peer Reviewed / Open Access
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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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