Real-time nanoscale analysis of immune evasion molecules from Streptococcus pyogenes using bio-imaging technologies
Project/Area Number |
21689048
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Single-year Grants |
Research Field |
Morphological basic dentistry
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Research Institution | Osaka University |
Principal Investigator |
TERAO Yutaka Osaka University, 大学院・歯学研究科, 准教授 (50397717)
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Project Period (FY) |
2009 – 2010
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Project Status |
Completed (Fiscal Year 2010)
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Budget Amount *help |
¥26,520,000 (Direct Cost: ¥20,400,000、Indirect Cost: ¥6,120,000)
Fiscal Year 2010: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2009: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
|
Keywords | 感染症 / 細菌 / 微生物 / 免疫学 / バイオ関連機器 / バイオ関連機 |
Research Abstract |
Neutrophils are part of the initial group of immune cells recruited to the site of infection. However, in severe streptococcal infection including streptococcal toxic shock syndrome, few neutrophils have been found near Streptococcus pyogenes, which rapidly infects various organs in STSS patients. S.pyogenes is thought to be equipped with virulence factors to evade the neutrophil immune system. Previously, we found that complement C3b functioned as an opsonin is degraded in sera from patients with streptococcal toxic shock syndrome. Furthermore, it has been revealed that S.pyogenes is able to fragment neutrophil extracellular traps (NETs). In the present study, we investigated the mechanism of S.pyogenes evasion from neutrophils. Biacore analysis demonstrated that rSpeB and wild-type S.pyogenes rapidly degrade C3b. In a mouse model, bacterial survival rate was lower for the ΔspeB mutant than the wild-type strain. Furthermore, histopathological observations showed that neutrophils infiltrated to the site of infection by the ΔspeB mutant, whereas few migrated to the infection site in mice injected with the wild type and S. pyogenes continued to spread along the fascia. Time-lapse microscopic analysis revealed that digestion of NETs was seen by the wild-type strain, but not ΔspeB mutant strain. Our results indicate that SpeB contributes to the escape of S. pyogenes from neutrophil immunity by degrading C3b and NETs at the site of initial infection.
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Report
(3 results)
Research Products
(62 results)
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[Journal Article] Biofilm formation or internalization into epithelial cells enable Streptococcus pyogenes to evade antibiotic eradication in patients with pharyngitis.2011
Author(s)
Ogawa, T., Terao, Y., Okuni, H., Ninomiya, K., Sakata, H., Ikebe, K., Maeda, Y., Kawabata, S.
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Journal Title
Microb. Pathog. (in press,出版予定)
Related Report
Peer Reviewed
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[Journal Article] Epidemiological characterization of Streptococcus pyogenes isolated from patients with multiple onsets of pharyngitis.2011
Author(s)
Ogawa, T., Terao, Y., Sakata, H., Okuni, H., Ninomiya, K., Ikebe, K., Maeda, Y., Kawabata, S.
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Journal Title
FEMS Microbiol.Lett. 318
Pages: 143-151
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to salivary amylase and promote the biofilm formation.2011
Author(s)
Okahashi, N., Nakata M., Sakurai A., Terao Y., Hoshino T., Yamaguchi Y., Isoda R., Sumitomo T., Nakano K., Kawabata S., Ooshima T.
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Journal Title
Microb. Pathog. 50
Pages: 148-154
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to salivary amylase and promote the biofilm formation2011
Author(s)
Okahashi, N., Nakata M., Sakurai A., Terao Y., Hoshino T., Yamaguchi Y., Isoda R., Sumitomo T., Nakano K., Kawabata S., Ooshima T.
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Journal Title
Microbial Pathogenesis
Volume: 50
Pages: 148-154
Related Report
Peer Reviewed
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[Journal Article] Epidemiological characterization of Streptococcus pyogenes isolated from patients with multiple onsets of pharyngitis2011
Author(s)
Ogawa, T., Terao, Y., Sakata, H., Okuni, H., Ninomiya, K., Ikebe, K., Maeda, Y., Kawabata S.
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Journal Title
FEMS Microbiology Letters
Volume: (印刷中)
Related Report
Peer Reviewed
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[Journal Article] Biofilm formation or internalization into epithelial cells enable Streptococcus pyogenes to evade antibiotic eradication in patients with pharyngitis2011
Author(s)
Ogawa, T., Terao, Y., Okuni, H., Ninomiya, K., Sakata, H., Ikebe, K., Maeda, Y., Kawabata S.
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Journal Title
Microbial Pathogenesis
Volume: (印刷中)
Related Report
Peer Reviewed
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[Journal Article] Fusobacterium nucleatum envelope protein, FomA, is immunogenic and binds to salivary statherin-derived peptide.2010
Author(s)
Nakagaki, H., Sekine S., Terao Y., Toe M., Tanaka M., Shizukuishi S., Ito H., Kawabata S., McGhee JR., Fujihashi K., Kataoka K.
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Journal Title
Infect. Immun. 78
Pages: 1185-1192
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to fibronectin and contribute to cell adhesion. Biochem.2010
Author(s)
Okahashi, N., Nakata M., Sakurai A., Terao Y., Hoshino T., Yamaguchi Y., Isoda R., Sumitomo T., Nakano K., Kawabata S., Ooshima T.
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Journal Title
Biophys.Res.Commun. 391
Pages: 1192-1196
Related Report
Peer Reviewed
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[Journal Article] Fusobacterium nucleatum envelope protein FomA is immunogenic and binds to the salivary statherin-derived peptide2010
Author(s)
Nakagaki, H., Sekine S., Terao Y., Toe M., Tanaka M., Shizukuishi S., Ito H., Kawabata S., McGhee JR., Fujihashi K., Kataoka K.
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Journal Title
Infection and Immunity
Volume: 78
Pages: 1185-1192
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to fibronectin and contribute to cell adhesion.2010
Author(s)
Okahashi N, M.Nakata, A.Sakurai, Y.Terao, T.Hoshino, M.Yamaguchi, R.Isoda, T.Sumitomo, K.Nakano, S.Kawabata, T.Ooshima.
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Journal Title
Biochem.Biophys.Res.Commun. 391(2)
Pages: 1192-1196
Related Report
Peer Reviewed
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[Journal Article] Mode of expression and functional characterization of FCT-3 pilus region encoded proteins in the Streptococcus pyogenes serotype M49.2009
Author(s)
Nakata, M., Koller, T., Moritz, K., Ribardo, D., Jonas, L., McIver, K.S., Sumitomo, T., Terao, Y., Kawabata, S., Podbielski, A.Kreikemeyer, B.
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Journal Title
Infect. Immun. 77
Pages: 32-44
Related Report
Peer Reviewed
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[Journal Article] Mode of expression and functional characterization of FCT-3 piles region encoded proteins in the Streptococcus pyogenes serotype M49.2009
Author(s)
Nakata, M., T.Kuller, K.Moritz, D.Ribardo, L.Jonas, K.S.McIver, T.Sumitomo, Y.Terao, S.Kawabata, A.Podbielski, B.Kreikemeyer.
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Journal Title
Infect.Immun. 77(1)
Pages: 32-44
Related Report
Peer Reviewed
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[Presentation] 再発性咽頭炎患者より分離されたA群レンサ球菌の分子解析に基づく新規治療法の提案2010
Author(s)
小川泰治, 寺尾豊, 大国壽士, 二宮恵子, 坂田宏, 入江正寛, 本間信夫, 中野正大, 明貝路子, 浜田茂幸, 川端重忠
Organizer
第19回レンサ球菌研究会
Place of Presentation
東京都
Related Report
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