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Protective role for the N-terminal domain of α-dystroglycan in Influenza A virus proliferation
Journal article   Open access   Peer reviewed

Protective role for the N-terminal domain of α-dystroglycan in Influenza A virus proliferation

Jessica C de Greef, Bram Slütter, Mary E Anderson, Rebecca Hamlyn, Raul O'Campo Landa, Ellison J McNutt, Yuji Hara, Lecia L Pewe, David Venzke, Kiichiro Matsumura, …
Proceedings of the National Academy of Sciences - PNAS, Vol.116(23), pp.11396-11401
06/04/2019
DOI: 10.1073/pnas.1904493116
PMCID: PMC6561248
PMID: 31097590
url
https://doi.org/10.1073/pnas.1904493116View
Published (Version of record) Open Access

Abstract

α-Dystroglycan (α-DG) is a highly glycosylated basement membrane receptor that is cleaved by the proprotein convertase furin, which releases its N-terminal domain (α-DGN). Before cleavage, α-DGN interacts with the glycosyltransferase LARGE1 and initiates functional O-glycosylation of the mucin-like domain of α-DG. Notably, α-DGN has been detected in a wide variety of human bodily fluids, but the physiological significance of secreted α-DGN remains unknown. Here, we show that mice lacking α-DGN exhibit significantly higher viral titers in the lungs after Influenza A virus (IAV) infection (strain A/Puerto Rico/8/1934 H1N1), suggesting an inability to control virus load. Consistent with this, overexpression of α-DGN before infection or intranasal treatment with recombinant α-DGN prior and during infection, significantly reduced IAV titers in the lungs of wild-type mice. Hemagglutination inhibition assays using recombinant α-DGN showed in vitro neutralization of IAV. Collectively, our results support a protective role for α-DGN in IAV proliferation.
Cell Line Basement Membrane - drug effects Humans Mice, Inbred C57BL Inflammation - virology Basement Membrane - virology Body Fluids - drug effects Body Fluids - virology Glycosylation - drug effects Influenza A Virus, H1N1 Subtype - drug effects Dystroglycans - pharmacology Lung - virology Animals Inflammation - drug therapy Protective Agents - pharmacology Lung - drug effects HEK293 Cells Influenza, Human - virology Cell Proliferation - drug effects Mice Influenza, Human - drug therapy Viral Load - methods Orthomyxoviridae Infections - virology Orthomyxoviridae Infections - drug therapy

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