2014 Fiscal Year Final Research Report
Study of the effect of oral bacteria on influenza infection
| Project/Area Number |
25862088
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Social dentistry
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Keywords | インフルエンザウイルス / 口腔内細菌 / ノイラミニダーゼ |
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| Outline of Final Research Achievements |
Influenza virus neuraminidase (NA) cleaves terminal sialic acid residues and promotes the release of progeny virus from an infected cell by destroying host cell receptors and the virus itself. Previous studies have reported the presence of bacterial NA activity in dental plaque fluid and saliva. In this study, we examined the biological effects of oral bacteria on the releases of influenza. Streptococcus oralis and Streptococcus mitis were found to exhibit NA activity and their culture supernatants promoted the release of influenza virus and cell-to-cell spread of the infection. Furthermore, we demonstrated that NA inhibitor zanamivir suppressed the release of progeny viruses from the infected cells, and interestingly, the viral release was restored upon the addition of culture supernatants of NA-producing oral bacteria.
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| Free Research Field |
口腔微生物学
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