Replication in the mononuclear phagocyte system (MPS) as a determinant of hantavirus pathogenicity
Members of different virus families including Hantaviridae cause viral hemorrhagic fevers (VHFs). The decisive determinants of hantavirus-associated pathogenicity are still enigmatic. Pathogenic hantavirus species such as Puumala virus (PUUV), Hantaan virus (HTNV), Dobrava virus (DOBV), and Sin Nomb...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 June 2020
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| In: |
Frontiers in Cellular and Infection Microbiology
Year: 2020, Jahrgang: 10 |
| ISSN: | 2235-2988 |
| DOI: | 10.3389/fcimb.2020.00281 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3389/fcimb.2020.00281 Verlag, lizenzpflichtig, Volltext: https://www.frontiersin.org/articles/10.3389/fcimb.2020.00281/full 
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| Verfasserangaben: | Martin J. Raftery, Pritesh Lalwani, Nina Lütteke, Lidija Kobak, Thomas Giese, Rainer G. Ulrich, Lukas Radosa, Detlev H. Krüger and Günther Schönrich |
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| 520 | |a Members of different virus families including Hantaviridae cause viral hemorrhagic fevers (VHFs). The decisive determinants of hantavirus-associated pathogenicity are still enigmatic. Pathogenic hantavirus species such as Puumala virus (PUUV), Hantaan virus (HTNV), Dobrava virus (DOBV), and Sin Nombre virus (SNV), are associated with significant case fatality rates. In contrast, Tula virus (TULV) only sporadically causes mild disease in immunocompetent humans and Prospect Hill virus (PHV) so far has not been associated with any symptoms. They are thus defined here as low pathogenic/apathogenic hantavirus species. We found that productive infection of cells of the mononuclear phagocyte system (MPS) such as monocytes and dendritic cells (DCs), correlated well with the pathogenicity of hantavirus species tested. HTNV (intermediate case fatality rates) replicated more efficiently than PUUV (low case fatality rates) in myeloid cells, whereas low pathogenic/apathogenic hantavirus species did not produce any detectable virus titers. Analysis of PHPUV, a reassortant hantavirus derived from a pathogenic (PUUV) and an apathogenic (PHV) hantavirus species, indicated that the viral glycoproteins are not decisive for replication in MPS cells. Moreover, blocking acidification of endosomes with chloroquine decreased the number of TULV genomes in myeloid cells suggesting a post-entry block for low pathogenic/apathogenic hantavirus species in myeloid cells. Intriguingly, pathogenic but not low pathogenic/apathogenic hantavirus species induced conversion of monocytes into inflammatory DCs. The proinflammatory programming of MPS cells by pathogenic hantavirus species required integrin signaling and viral replication. Our findings indicate that the capacity to replicate in MPS cells is a prominent feature of hantaviral pathogenicity. | ||
| 650 | 4 | |a Dendritic Cells | |
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| 650 | 4 | |a Immunopathogenesis | |
| 650 | 4 | |a Monocytes | |
| 650 | 4 | |a viral pathogenesis | |
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