徳島大学 教育・研究者情報データベース(EDB)

1. 日吉 峰麗

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2. (英) Indalao I.L

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3. 矢野 仁康

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4. 山根 一彦

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5. 高橋 悦久([徳島大学.先端酵素学研究所.重点研究部門])

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6. 木戸 博([徳島大学.先端酵素学研究所.重点研究部門])

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(英) Influenza A virus infection of vascular endothelial cells induces GSK-3β-mediated β-catenin degradation in adherens junctions, with a resultant increase in membrane permeability.

(英) Multiorgan failure with vascular hyperpermeability is the final outcome in the progression of seasonal influenza virus pneumonia and influenza-associated encephalopathy, and it is also common in infection with highly pathogenic avian influenza virus. However, the precise molecular mechanism by which influenza virus infection causes vascular endothelial cell hyperpermeability remains poorly defined. We investigated the mechanisms of hyperpermeability of human umbilical vein endothelial cells infected with influenza A virus (IAV)/Puerto Rico/8/34 (PR8) (H1N1). The levels of β-catenin, a key regulatory component of the vascular endothelial-cadherin cell adhesion complex, were markedly decreased during infection for 28 h, with increments of vascular hyperpermeability measured by transendothelial electrical resistance. Lactacystin (at 2 μM), a proteasome inhibitor, inhibited the decrease in β-catenin levels. Since the N-terminal phosphorylation of β-catenin by glycogen synthase kinase (GSK)-3β is the initiation step of proteasome-dependent degradation, we examined the effects of GSK-3β suppression by RNA interference in endothelial cells. IAV-infection-induced β-catenin degradation was significantly inhibited in GSK-3β-knockdown cells, and transfection of cells with recombinant β-catenin significantly suppressed IAV-induced hyperpermeability. These findings suggest that IAV infection induces GSK-3β-mediated β-catenin degradation in the adherens junctional complexes and induces vascular hyperpermeability. The in vitro findings of β-catenin degradation and activation of GSK-3β after IAV infection were confirmed in lungs of mice infected with IAV PR8 during the course of infection from day 0 to day 6. These results suggest that GSK-3β-mediated β-catenin degradation in adherens junctions is one of the key mechanisms of vascular hyperpermeability in severe influenza.

1. (英) Adherens Junctions
2. (英) Animals
3. (英) Cell Membrane
4. (英) Cells, Cultured
5. (英) Endothelial Cells
6. (英) Female
7. (英) Gene Silencing
8. (英) Glycogen Synthase Kinase 3
9. (英) Humans
10. (英) Influenza A Virus, H1N1 Subtype
11. (英) Mice
12. (英) Mice, Inbred C57BL
13. (英) Permeability
14. (英) beta Catenin

1. (英) Article.ELocationID: 10.1007/s00705-014-2270-5

2. (英) Article.PublicationTypeList.PublicationType: Journal Article

3. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't

4. (英) OtherID: PMC4284391