Analysis of streptococcal translocation across epithelial barrier via paracellular route
Project/Area Number |
26462780
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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 |
Morphological basic dentistry
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Research Institution | Osaka University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
川端 重忠 大阪大学, 歯学研究科, 教授 (50273694)
中田 匡宣 大阪大学, 歯学研究科, 准教授 (90444497)
山口 雅也 大阪大学, 歯学研究科, 助教 (00714536)
|
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | レンサ球菌 / 上皮バリア |
Outline of Final Research Achievements |
Streptococcus pyogenes is a human-specific pathogen responsible for local suppurative and life-threatening invasive systemic diseases. In the present study, a serotype M28 strain was found predominantly localized in tricellular tight junctions (tTJs) of epithelial cells cultured in the presence of plasminogen (PLG). Several lines of evidence indicated that interaction of PLG with tricellulin, a major component of tTJs, is crucial for bacterial localization. Additionally, we demonstrated that PLG functions as a molecular bridge between tricellulin and streptococcal surface enolase (SEN). The wild type strain efficiently translocated across the epithelial monolayer, accompanied by cleavage of transmembrane junctional proteins. In contrast, amino acid substitutions in the PLG-binding motif of SEN markedly compromised those activities. Our findings provide insight into the mechanism by which S. pyogenes exploits host PLG for acceleration of bacterial invasion into deeper tissues via tTJs.
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Report
(4 results)
Research Products
(77 results)
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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] Degradation of bradykinin by a metalloendopeptidase from Streptococcus pyogenes.2016
Author(s)
Miyamoto, T., Akaike, T., Kawabata, S., Akuta, T., Taruki, C., Yoshitake, J., Hamada, S., Ota, F., Ikarashi, H., Yoshimura, K., Kamijo, R., Maeda, H.
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Journal Title
Journal of Oral Biosciences
Volume: 58
Issue: 4
Pages: 167-172
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Lysine and threonine biosynthesis from aspartate contributes to Staphylococcus aureus growth in calf serum.2016
Author(s)
Oogai, Y., Yamaguchi, M., Kawada-Matsuo, M., Sumitomo, T., Kawabata, S., Komatsuzawa, H.
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Journal Title
Applied and Environmental Microbiology
Volume: 82
Issue: 20
Pages: 6150-6157
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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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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[Journal Article] Effects of extracellular pH on Dental Pulp Cells in Vitro2016
Author(s)
Hirose, Y., Yamaguchi, M., Kawabata, S., Murakami, M., Nakashima, M., Gotoh, M., Yamamoto, T.
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Journal Title
Journal of endodontics
Volume: 印刷中
Issue: 5
Pages: 735-741
DOI
Related Report
Peer Reviewed / Open Access
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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, and Nizet V.
Organizer
SFG and JSCR2014 Joint Annual Meeting.
Place of Presentation
Honolulu, HI, USA.
Year and Date
2014-11-16 – 2014-11-19
Related Report
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