Home > Publications database > αVβ3 Integrin Expression Is Essential for Replication of Mosquito and Tick-Borne Flaviviruses in Murine Fibroblast Cells. > print

001     178605
005     20240918080143.0
024 7 _ |a 10.3390/v14010018
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037 _ _ |a DKFZ-2022-00154
041 _ _ |a English
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100 1 _ |a Reis, Vinicius Pinho Dos
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245 _ _ |a αVβ3 Integrin Expression Is Essential for Replication of Mosquito and Tick-Borne Flaviviruses in Murine Fibroblast Cells.
260 _ _ |a Basel
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520 _ _ |a The Flavivirus genus includes a number of important viruses that are pathogenic to humans and animals and are responsible for outbreaks across the globe. Integrins, a family of heterodimeric transmembrane molecules expressed in all nucleated cells mediate critical functions of cell physiology and cell cycle. Integrins were previously postulated to be involved in flavivirus entry and to modulate flavivirus replication efficiency. In the present study, mouse embryonic fibroblasts (MEF), lacking the expression of αVβ3 integrin (MEF-αVβ3-/-), were infected with four different flaviviruses, namely yellow fever virus (YFV), West Nile virus (WNV), Usutu virus (USUV) and Langat virus (LGTV). The effects of the αVβ3 integrin absence in double-knockout MEF-αVβ3-/- on flavivirus binding, internalization and replication were compared to the respective wild-type cells. Binding to the cell surface for all four flaviviruses was not affected by the ablation of αVβ3 integrin, whereas internalization of USUV and WNV was slightly affected by the loss of αVβ3 integrin expression. Most interestingly, the deletion of αVβ3 integrin strongly impaired replication of all flaviviruses with a reduction of up to 99% on virus yields and a strong reduction on flavivirus anti-genome RNA synthesis. In conclusion, our results demonstrate that αVβ3 integrin expression in flavivirus-susceptible cell lines enhances the flavivirus replication.
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650 _ 7 |a flavivirus
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650 _ 7 |a host cell factors
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650 _ 7 |a integrins
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650 _ 7 |a virus binding
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650 _ 7 |a virus internalization
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650 _ 7 |a virus replication
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700 1 _ |a Keller, Markus
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700 1 _ |a Schmidt, Katja
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700 1 _ |a Ulrich, Rainer Günter
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700 1 _ |a Groschup, Martin Hermann
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773 _ _ |a 10.3390/v14010018
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