Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus

ABSTRACT The metabolic pathways of central carbon metabolism, glycolysis and oxidative phosphorylation (OXPHOS), are important host factors that determine the outcome of viral infections and can be manipulated by some viruses to favor infection. However, mechanisms of metabolic modulation and their...

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Autores principales: Karla D. Passalacqua, Jia Lu, Ian Goodfellow, Abimbola O. Kolawole, Jacob R. Arche, Robert J. Maddox, Kelly E. Carnahan, Mary X. D. O’Riordan, Christiane E. Wobus
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Publicado: American Society for Microbiology 2019
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spelling oai:doaj.org-article:816f72c400f1417ea2ea221faebff5862021-11-15T15:55:24ZGlycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus10.1128/mBio.02175-182150-7511https://doaj.org/article/816f72c400f1417ea2ea221faebff5862019-04-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.02175-18https://doaj.org/toc/2150-7511ABSTRACT The metabolic pathways of central carbon metabolism, glycolysis and oxidative phosphorylation (OXPHOS), are important host factors that determine the outcome of viral infections and can be manipulated by some viruses to favor infection. However, mechanisms of metabolic modulation and their effects on viral replication vary widely. Herein, we present the first metabolomics and energetic profiling of norovirus-infected cells, which revealed increases in glycolysis, OXPHOS, and the pentose phosphate pathway (PPP) during murine norovirus (MNV) infection. Inhibiting glycolysis with 2-deoxyglucose (2DG) in macrophages revealed that glycolysis is an important factor for optimal MNV infection, while inhibiting the PPP and OXPHOS showed a relatively minor impact of these pathways on MNV infection. 2DG affected an early stage in the viral life cycle after viral uptake and capsid uncoating, leading to decreased viral protein production and viral RNA. The requirement of glycolysis was specific for MNV (but not astrovirus) infection, independent of the type I interferon antiviral response, and unlikely to be due to a lack of host cell nucleotide synthesis. MNV infection increased activation of the protein kinase Akt, but not AMP-activated protein kinase (AMPK), two master regulators of cellular metabolism, implicating Akt signaling in upregulating host metabolism during norovirus infection. In conclusion, our findings suggest that the metabolic state of target cells is an intrinsic host factor that determines the extent of norovirus replication and implicates glycolysis as a virulence determinant. They further point to cellular metabolism as a novel therapeutic target for norovirus infections and improvements in current human norovirus culture systems. IMPORTANCE Viruses depend on the host cells they infect to provide the machinery and substrates for replication. Host cells are highly dynamic systems that can alter their intracellular environment and metabolic behavior, which may be helpful or inhibitory for an infecting virus. In this study, we show that macrophages, a target cell of murine norovirus (MNV), increase glycolysis upon viral infection, which is important for early steps in MNV infection. Human noroviruses (hNoV) are a major cause of gastroenteritis globally, causing enormous morbidity and economic burden. Currently, no effective antivirals or vaccines exist for hNoV, mainly due to the lack of high-efficiency in vitro culture models for their study. Thus, insights gained from the MNV model may reveal aspects of host cell metabolism that can be targeted for improving hNoV cell culture systems and for developing effective antiviral therapies.Karla D. PassalacquaJia LuIan GoodfellowAbimbola O. KolawoleJacob R. ArcheRobert J. MaddoxKelly E. CarnahanMary X. D. O’RiordanChristiane E. WobusAmerican Society for Microbiologyarticlecaliciviruscarbon metabolismglycolysisnorovirusesoxidative phosphorylationpentose phosphate pathwayMicrobiologyQR1-502ENmBio, Vol 10, Iss 2 (2019)
institution DOAJ
collection DOAJ
language EN
topic calicivirus
carbon metabolism
glycolysis
noroviruses
oxidative phosphorylation
pentose phosphate pathway
Microbiology
QR1-502
spellingShingle calicivirus
carbon metabolism
glycolysis
noroviruses
oxidative phosphorylation
pentose phosphate pathway
Microbiology
QR1-502
Karla D. Passalacqua
Jia Lu
Ian Goodfellow
Abimbola O. Kolawole
Jacob R. Arche
Robert J. Maddox
Kelly E. Carnahan
Mary X. D. O’Riordan
Christiane E. Wobus
Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
description ABSTRACT The metabolic pathways of central carbon metabolism, glycolysis and oxidative phosphorylation (OXPHOS), are important host factors that determine the outcome of viral infections and can be manipulated by some viruses to favor infection. However, mechanisms of metabolic modulation and their effects on viral replication vary widely. Herein, we present the first metabolomics and energetic profiling of norovirus-infected cells, which revealed increases in glycolysis, OXPHOS, and the pentose phosphate pathway (PPP) during murine norovirus (MNV) infection. Inhibiting glycolysis with 2-deoxyglucose (2DG) in macrophages revealed that glycolysis is an important factor for optimal MNV infection, while inhibiting the PPP and OXPHOS showed a relatively minor impact of these pathways on MNV infection. 2DG affected an early stage in the viral life cycle after viral uptake and capsid uncoating, leading to decreased viral protein production and viral RNA. The requirement of glycolysis was specific for MNV (but not astrovirus) infection, independent of the type I interferon antiviral response, and unlikely to be due to a lack of host cell nucleotide synthesis. MNV infection increased activation of the protein kinase Akt, but not AMP-activated protein kinase (AMPK), two master regulators of cellular metabolism, implicating Akt signaling in upregulating host metabolism during norovirus infection. In conclusion, our findings suggest that the metabolic state of target cells is an intrinsic host factor that determines the extent of norovirus replication and implicates glycolysis as a virulence determinant. They further point to cellular metabolism as a novel therapeutic target for norovirus infections and improvements in current human norovirus culture systems. IMPORTANCE Viruses depend on the host cells they infect to provide the machinery and substrates for replication. Host cells are highly dynamic systems that can alter their intracellular environment and metabolic behavior, which may be helpful or inhibitory for an infecting virus. In this study, we show that macrophages, a target cell of murine norovirus (MNV), increase glycolysis upon viral infection, which is important for early steps in MNV infection. Human noroviruses (hNoV) are a major cause of gastroenteritis globally, causing enormous morbidity and economic burden. Currently, no effective antivirals or vaccines exist for hNoV, mainly due to the lack of high-efficiency in vitro culture models for their study. Thus, insights gained from the MNV model may reveal aspects of host cell metabolism that can be targeted for improving hNoV cell culture systems and for developing effective antiviral therapies.
format article
author Karla D. Passalacqua
Jia Lu
Ian Goodfellow
Abimbola O. Kolawole
Jacob R. Arche
Robert J. Maddox
Kelly E. Carnahan
Mary X. D. O’Riordan
Christiane E. Wobus
author_facet Karla D. Passalacqua
Jia Lu
Ian Goodfellow
Abimbola O. Kolawole
Jacob R. Arche
Robert J. Maddox
Kelly E. Carnahan
Mary X. D. O’Riordan
Christiane E. Wobus
author_sort Karla D. Passalacqua
title Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
title_short Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
title_full Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
title_fullStr Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
title_full_unstemmed Glycolysis Is an Intrinsic Factor for Optimal Replication of a Norovirus
title_sort glycolysis is an intrinsic factor for optimal replication of a norovirus
publisher American Society for Microbiology
publishDate 2019
url https://doaj.org/article/816f72c400f1417ea2ea221faebff586
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