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Sala S, Nitschke P, Masuda R, Gray N, Lawler NG, Wood JM, Buckler JN, Berezhnoy G, Bolaños J, Boughton BA, Lonati C, Rössler T, Singh Y, Wilson ID, Lodge S, Morillon AC, Loo RL, Hall D, Whiley L, Evans GB, Grove TL, Almo SC, Harris LD, Holmes E, Merle U, Trautwein C, Nicholson JK, Wist J. Integrative Molecular Structure Elucidation and Construction of an Extended Metabolic Pathway Associated with an Ancient Innate Immune Response in COVID-19 Patients. J Proteome Res 2024; 23:956-970. [PMID: 38310443 PMCID: PMC10913068 DOI: 10.1021/acs.jproteome.3c00654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/01/2023] [Accepted: 12/29/2023] [Indexed: 02/05/2024]
Abstract
We present compelling evidence for the existence of an extended innate viperin-dependent pathway, which provides crucial evidence for an adaptive response to viral agents, such as SARS-CoV-2. We show the in vivo biosynthesis of a family of novel endogenous cytosine metabolites with potential antiviral activities. Two-dimensional nuclear magnetic resonance (NMR) spectroscopy revealed a characteristic spin-system motif, indicating the presence of an extended panel of urinary metabolites during the acute viral replication phase. Mass spectrometry additionally enabled the characterization and quantification of the most abundant serum metabolites, showing the potential diagnostic value of the compounds for viral infections. In total, we unveiled ten nucleoside (cytosine- and uracil-based) analogue structures, eight of which were previously unknown in humans allowing us to propose a new extended viperin pathway for the innate production of antiviral compounds. The molecular structures of the nucleoside analogues and their correlation with an array of serum cytokines, including IFN-α2, IFN-γ, and IL-10, suggest an association with the viperin enzyme contributing to an ancient endogenous innate immune defense mechanism against viral infection.
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Affiliation(s)
- Samuele Sala
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Philipp Nitschke
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Reika Masuda
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Nicola Gray
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Nathan G. Lawler
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - James M. Wood
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovef Wellington, Welry, The University of Auckland, Auckland 1010, New Zealand
| | - Joshua N. Buckler
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
| | - Georgy Berezhnoy
- Department
of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, University Hospital Tübingen, 72074 Tübingen, Germany
| | - Jose Bolaños
- Chemistry
Department, Universidad del Valle, Cali 76001, Colombia
| | - Berin A. Boughton
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Caterina Lonati
- Center
for Preclinical Research, Fondazione IRCCS
Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Titus Rössler
- Department
of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, University Hospital Tübingen, 72074 Tübingen, Germany
| | - Yogesh Singh
- Institute
of Medical Genetics and Applied Genomics, University Hospital Tübingen, 72074 Tübingen, Germany
| | - Ian D. Wilson
- Division
of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College, Burlington Danes Building, Du Cane Road, London W12 0NN, U.K.
| | - Samantha Lodge
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Aude-Claire Morillon
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Ruey Leng Loo
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Drew Hall
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Luke Whiley
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
| | - Gary B. Evans
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovef Wellington, Welry, The University of Auckland, Auckland 1010, New Zealand
| | - Tyler L. Grove
- Department
of Biochemistry, Albert Einstein College
of Medicine, Bronx, New York 10461, United States
| | - Steven C. Almo
- Department
of Biochemistry, Albert Einstein College
of Medicine, Bronx, New York 10461, United States
| | - Lawrence D. Harris
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovef Wellington, Welry, The University of Auckland, Auckland 1010, New Zealand
| | - Elaine Holmes
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
- Division
of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College, Burlington Danes Building, Du Cane Road, London W12 0NN, U.K.
| | - Uta Merle
- Department
of Internal Medicine IV, University Hospital
Heidelberg, 69120 Heidelberg, Germany
| | - Christoph Trautwein
- Department
of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, University Hospital Tübingen, 72074 Tübingen, Germany
| | - Jeremy K. Nicholson
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
- Institute
of Global Health Innovation, Faculty of
Medicine, Imperial College London, Level 1, Faculty Building, South Kensington Campus, London SW7 2NA, U.K.
| | - Julien Wist
- The
Australian National Phenome Centre and Computational and Systems Medicine,
Health Futures Institute, Murdoch University, Harry Perkins Building, Perth WA6150, Australia
- Chemistry
Department, Universidad del Valle, Cali 76001, Colombia
- Faculty of Medicine, Department of Metabolism,
Digestion and Reproduction,
Division of Digestive Diseases at Imperial College, London SW7 2AZ, U.K.
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Cowell E, Jaber H, Kris LP, Fitzgerald MG, Sanders VM, Norbury AJ, Eyre NS, Carr JM. Vav proteins do not influence dengue virus replication but are associated with induction of phospho-ERK, IL-6, and viperin mRNA following DENV infection in vitro. Microbiol Spectr 2024; 12:e0239123. [PMID: 38054722 PMCID: PMC10782993 DOI: 10.1128/spectrum.02391-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/03/2023] [Indexed: 12/07/2023] Open
Abstract
IMPORTANCE Dengue disease is characterized by an inflammatory-mediated immunopathology, with elevated levels of circulating factors including TNF-α and IL-6. If the damaging inflammatory pathways could be blocked without loss of antiviral responses or exacerbating viral replication, then this would be of potential therapeutic benefit. The study here has investigated the Vav guanine exchange factors as a potential alternative signaling pathway that may drive dengue virus (DENV)-induced inflammatory responses, with a focus on Vav1 and 2. While Vav proteins were positively associated with mRNA for inflammatory cytokines, blocking Vav signaling didn't affect DENV replication but prevented DENV-induction of p-ERK and enhanced IL-6 (inflammatory) and viperin (antiviral) mRNA. These initial data suggest that Vav proteins could be a target that does not compromise control of viral replication and should be investigated further for broader impact on host inflammatory responses, in settings such as antibody-dependent enhancement of infection and in different cell types.
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Affiliation(s)
- Evangeline Cowell
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Hawraa Jaber
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Luke P. Kris
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Madeleine G. Fitzgerald
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Valeria M. Sanders
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Aidan J. Norbury
- Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, Australia
| | - Nicholas S. Eyre
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
| | - Jillian M. Carr
- College of Medicine and Public Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide, South Australia, Australia
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Abstract
Pathogens have fueled the diversification of intracellular defense strategies that collectively define cell-autonomous innate immunity. In bacteria, innate immunity is manifested by a broad arsenal of defense systems that provide protection against bacterial viruses, called phages. The complexity of the bacterial immune repertoire has only been realized recently and is now suggesting that innate immunity has commonalities across the tree of life: many components of eukaryotic innate immunity are found in bacteria where they protect against phages, including the cGAS-STING pathway, gasdermins, and viperins. Here, I summarize recent findings on the conservation of innate immune pathways between prokaryotes and eukaryotes and hypothesize that bacterial defense mechanisms can catalyze the discovery of novel molecular players of eukaryotic innate immunity.
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Affiliation(s)
- François Rousset
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel.
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Lee J, Wood JM, Almo SC, Evans GB, Harris LD, Grove TL. Chemoenzymatic Synthesis of 3'-Deoxy-3',4'-didehydro-cytidine triphosphate (ddhCTP). ACS Bio Med Chem Au 2023; 3:322-326. [PMID: 37599790 PMCID: PMC10436258 DOI: 10.1021/acsbiomedchemau.3c00014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 08/22/2023]
Abstract
3'-Deoxy-3',4'-didehydro-cytidine triphosphate (ddhCTP) is a novel antiviral molecule produced by the enzyme viperin during the early stages of the innate immune response. ddhCTP has been shown to act as a chain terminator of flavivirus RNA-dependent RNA polymerases. To date, synthesis of ddhCTP requires complicated synthetic protocols or isolation of the enzyme viperin to catalyze the production of ddhCTP from CTP. Recombinant viperin approaches preclude the production of highly pure ddhCTP (free of contaminants such as CTP), whereas the chemical synthesis involves techniques or equipment not readily available to most laboratories. Herein, we describe the chemoenzymatic synthesis of ddhCTP, starting from commercially available ddhC. We utilize these methods to produce milligram quantities of ddhCTP, ddhCDP, and ddhCMP. Using purified semisynthetic ddhCTP and fully synthetic ddhCTP, we also show ddhCTP does not inhibit NAD+-dependent enzymes such as glyceraldehyde 3-phosphate dehydrogenase, malate dehydrogenase, or lactate dehydrogenase, contrary to a recent report.
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Affiliation(s)
- James
H. Lee
- Department
of Biochemistry, Albert Einstein College
of Medicine, Bronx, New York 10461, United States
| | - James M. Wood
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - Steven C. Almo
- Department
of Biochemistry, Albert Einstein College
of Medicine, Bronx, New York 10461, United States
| | - Gary B. Evans
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - Lawrence D. Harris
- Ferrier
Research Institute, Victoria University
of Wellington, Wellington 6012, New Zealand
- The
Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - Tyler L. Grove
- Department
of Biochemistry, Albert Einstein College
of Medicine, Bronx, New York 10461, United States
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Kim JJ, Hong S, Seo JY. A Cysteine Residue of Human Cytomegalovirus vMIA Protein Plays a Crucial Role in Viperin Trafficking to Control Viral Infectivity. J Virol 2023; 97:e0187422. [PMID: 37306568 PMCID: PMC10308886 DOI: 10.1128/jvi.01874-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 05/22/2023] [Indexed: 06/13/2023] Open
Abstract
Viperin is a multifunctional interferon-inducible protein that is directly induced in cells by human cytomegalovirus (HCMV) infection. The viral mitochondrion-localized inhibitor of apoptosis (vMIA) interacts with viperin at the early stages of infection and translocates it from the endoplasmic reticulum to the mitochondria, where viperin modulates the cellular metabolism to increase viral infectivity. Viperin finally relocalizes to the viral assembly compartment (AC) at late stages of infection. Despite the importance of vMIA interactions with viperin during viral infection, their interacting residues are unknown. In the present study, we showed that cysteine residue 44 (Cys44) of vMIA and the N-terminal domain (amino acids [aa] 1 to 42) of viperin are necessary for their interaction and for the mitochondrial localization of viperin. In addition, the N-terminal domain of mouse viperin, which is structurally similar to that of human viperin, interacted with vMIA. This indicates that the structure, rather than the sequence composition, of the N-terminal domain of viperin, is required for the interaction with vMIA. Recombinant HCMV, in which Cys44 of vMIA was replaced by an alanine residue, failed to translocate viperin to the mitochondria at the early stages of infection and inefficiently relocalized it to the AC at late stages of infection, resulting in the impairment of viperin-mediated lipid synthesis and a reduction in viral replication. These data indicate that Cys44 of vMIA is therefore essential for the intracellular trafficking and function of viperin to increase viral replication. Our findings also suggest that the interacting residues of these two proteins are potential therapeutic targets for HCMV-associated diseases. IMPORTANCE Viperin traffics to the endoplasmic reticulum (ER), mitochondria, and viral assembly compartment (AC) during human cytomegalovirus (HCMV) infection. Viperin has antiviral activity at the ER and regulates cellular metabolism at the mitochondria. Here, we show that Cys44 of HCMV vMIA protein and the N-terminal domain (aa 1 to 42) of viperin are necessary for their interaction. Cys44 of vMIA also has a critical role for viperin trafficking from the ER to the AC via the mitochondria during viral infection. Recombinant HCMV expressing a mutant vMIA Cys44 has impaired lipid synthesis and viral infectivity, which are attributed to mislocalization of viperin. Cys44 of vMIA is essential for the trafficking and function of viperin and may be a therapeutic target for HCMV-associated diseases.
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Affiliation(s)
- Jeong Jin Kim
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sookyung Hong
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jun-Young Seo
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
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Lee SH, Han MS, Lee TH, Lee DB, Park JH, Lee SH, Kim TH. Hydrogen peroxide attenuates rhinovirus-induced anti-viral interferon secretion in sinonasal epithelial cells. Front Immunol 2023; 14:1086381. [PMID: 36860857 PMCID: PMC9968966 DOI: 10.3389/fimmu.2023.1086381] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/01/2023] [Indexed: 02/15/2023] Open
Abstract
Background Altered innate defense mechanisms, including an imbalance between oxidants and antioxidants release, have been implicated in the pathogenesis of chronic rhinosinusitis (CRS). The aim of this study is to investigate whether oxidative stress may attenuate the secretion of anti-viral interferons in human sinonasal mucosa. Methods The levels of H2O2 in nasal secretion were increased in patients with CRS with nasal polyps, compared with that of CRS patients without nasal polyps and control subjects. Normal sinonasal epithelial cells derived from healthy subjects were cultured under an air-liquid interface. The cultured cells were infected with rhinovirus 16 (RV 16) or treated with poly (I: C), TLR3 agonist, after being pretreated with an oxidative stressor, H2O2 or antioxidant, N-acetylcysteine (NAC). Thereafter, the expression levels of type I (IFN-β) and type III (IFN-λ1 and λ2) interferons and interferon-stimulated genes (ISGs) were evaluated with RT-qPCR, ELISA, and western blot. Results The data showed that the production of type I (IFN-β) and type III (IFN-λ1 and λ2) interferons and ISGs was upregulated in cells infected with RV 16 or treated with poly (I: C). However, their up-regulated expression was attenuated in cells pretreated with H2O2, but not inhibited in cells pretreated with NAC. In line with these data, the up-regulated expression of TLR3, RIG-1, MDA5, and IRF3 was reduced in cells pretreated with H2O2, but not attenuated in cells treated with NAC. Furthermore, cells transfected with Nrf2 siRNA showed decreased secretion of anti-viral interferons whereas sulforaphane treatment enhanced the secretory capacity of antiviral interferons. Conclusions These results suggest that the production of RV16-induced antiviral interferons may be attenuated by oxidative stress.
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Affiliation(s)
- Sang Hag Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Mun Soo Han
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Tae Hoon Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Da Bin Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Jae Hyung Park
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Seung Hyeok Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Tae Hoon Kim
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Republic of Korea
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7
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Hsu JCC, Laurent-Rolle M, Pawlak JB, Xia H, Kunte A, Hee JS, Lim J, Harris LD, Wood JM, Evans GB, Shi PY, Grove TL, Almo SC, Cresswell P. Viperin triggers ribosome collision-dependent translation inhibition to restrict viral replication. Mol Cell 2022; 82:1631-1642.e6. [PMID: 35316659 PMCID: PMC9081181 DOI: 10.1016/j.molcel.2022.02.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/06/2022] [Accepted: 02/23/2022] [Indexed: 12/31/2022]
Abstract
Innate immune responses induce hundreds of interferon-stimulated genes (ISGs). Viperin, a member of the radical S-adenosyl methionine (SAM) superfamily of enzymes, is the product of one such ISG that restricts the replication of a broad spectrum of viruses. Here, we report a previously unknown antiviral mechanism in which viperin activates a ribosome collision-dependent pathway that inhibits both cellular and viral RNA translation. We found that the radical SAM activity of viperin is required for translation inhibition and that this is mediated by viperin's enzymatic product, 3'-deoxy-3',4'-didehydro-CTP (ddhCTP). Viperin triggers ribosome collisions and activates the MAPKKK ZAK pathway that in turn activates the GCN2 arm of the integrated stress response pathway to inhibit translation. The study illustrates the importance of translational repression in the antiviral response and identifies viperin as a translation regulator in innate immunity.
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Affiliation(s)
- Jack Chun-Chieh Hsu
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Maudry Laurent-Rolle
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Microbial Pathogenesis, Yale School of Medicine, New Haven, CT 06520, USA
| | - Joanna B Pawlak
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Hongjie Xia
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Amit Kunte
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jia Shee Hee
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jaechul Lim
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Lawrence D Harris
- The Ferrier Research Institute, Victoria University of Wellington, Wellington 6012, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - James M Wood
- The Ferrier Research Institute, Victoria University of Wellington, Wellington 6012, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - Gary B Evans
- The Ferrier Research Institute, Victoria University of Wellington, Wellington 6012, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland 1010, New Zealand
| | - Pei-Yong Shi
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77555, USA; Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX 77555, USA; Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX 77555, USA; Sealy Institute for Drug Discovery, Galveston, TX 77555, USA
| | - Tyler L Grove
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Steven C Almo
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Peter Cresswell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06520, USA.
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8
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Ahmed F, Husain M. Human N-Alpha-Acetyltransferase 60 Promotes Influenza A Virus Infection by Dampening the Interferon Alpha Signaling. Front Immunol 2022; 12:771792. [PMID: 35095845 PMCID: PMC8790067 DOI: 10.3389/fimmu.2021.771792] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/20/2021] [Indexed: 11/20/2022] Open
Abstract
N-alpha-acetyltransferase 60 (NAA60) is the most recently discovered N-terminal acetyltransferase and found only in multicellular eukaryotes. NAA60 localizes to the Golgi complex and is one of the only two N-terminal acetyltransferases known to localize to an organelle. Furthermore, NAA60 possesses a unique ability of catalyzing the acetylation of membrane-anchored proteins at the N-terminus and histones at the lysine side chains. Herein, we demonstrate that NAA60 exhibits proviral properties during influenza A virus (IAV) infection by interfering with the interferon (IFN) α signaling. We found that the depletion and overexpression of NAA60 reduced and enhanced, respectively, the IAV growth in a cell type- and IAV strain-independent manner. Mechanistically, the IAV-induced expression of IFNα was increased and decreased in NAA60-depleted and -overexpressing cells, respectively. Furthermore, the depletion of NAA60 enhanced the level of phosphorylated STAT1 transcription factor as well as the expression of several IFN-stimulated genes (ISGs) such as MX1, CH25H, IFITM3, ISG15 and viperin in infected cells. Whereas the overexpression of NAA60 produced opposite results. Finally, similar results were obtained when the NAA60-depleted cells were treated with purified IFNα. These findings, in conjunction with our recent findings where N-terminal acetylation of many host proteins increased in response to the IAV infection, indicate an important role of N-terminal acetylation during IAV replication.
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9
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Al Shujairi WH, Kris LP, van der Hoek K, Cowell E, Bracho-Granado G, Woodgate T, Beard MR, Carr JM. Viperin is anti-viral in vitro but is dispensable for restricting dengue virus replication or induction of innate and inflammatory responses in vivo. J Gen Virol 2021; 102. [PMID: 34665110 PMCID: PMC8604189 DOI: 10.1099/jgv.0.001669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Viperin has antiviral function against many viruses, including dengue virus (DENV), when studied in cells in culture. Here, the antiviral actions of viperin were defined both in vitro and in a mouse in vivo model of DENV infection. Murine embryonic fibroblasts (MEFs) derived from mice lacking viperin (vip−/−) showed enhanced DENV infection, accompanied by increased IFN-β and induction of ISGs; IFIT1 and CXCL-10 but not IRF7, when compared to wild-type (WT) MEFs. In contrast, subcutaneous challenge of immunocompetent WT and vip−/− mice with DENV did not result in enhanced infection. Intracranial infection with DENV resulted in body weight loss and neurological disease with a moderate increase in mortality in vip−/− compared with WT mice, although this was not accompanied by altered brain morphology, immune cell infiltration or DENV RNA level in the brain. Similarly, DENV induction of IFN-β, IFIT1, CXCL-10, IRF7 and TNF-α was not significantly different in WT and vip−/− mouse brain, although there was a modest but significant increase in DENV induction of IL-6 and IfI27la in the absence of viperin. NanoString nCounter analysis confirmed no significant difference in induction of a panel of inflammatory genes in WT compared to vip−/− DENV-infected mouse brains. Further, polyI:C stimulation of bone marrow-derived macrophages (BMDMs) induced TNF-α, IFN-β, IL-6 and Nos-2, but responses were not different in BMDMs generated from WT or vip−/− mice. Thus, while there is significant evidence of anti-DENV actions of viperin in some cell types in vitro, for DENV infection in vivo a lack of viperin does not affect systemic or brain susceptibility to DENV or induction of innate and inflammatory responses.
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Affiliation(s)
- Wisam-Hamzah Al Shujairi
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Department of Clinical Laboratory Sciences, College of Pharmacy, University of Babylon, 51001 Hilla, Iraq
| | - Luke P Kris
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Kylie van der Hoek
- School of Biological Sciences, Research Centre for Infectious Diseases, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Evangeline Cowell
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | | | - Tahlia Woodgate
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Michael R Beard
- School of Biological Sciences, Research Centre for Infectious Diseases, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Jillian M Carr
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
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10
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Mou CY, Li S, Lu LF, Wang Y, Yu P, Li Z, Tong JF, Zhang QY, Wang ZW, Zhang XJ, Wang GX, Zhou L, Gui JF. Divergent Antiviral Mechanisms of Two Viperin Homeologs in a Recurrent Polyploid Fish. Front Immunol 2021; 12:702971. [PMID: 34531856 PMCID: PMC8438203 DOI: 10.3389/fimmu.2021.702971] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/09/2021] [Indexed: 12/03/2022] Open
Abstract
Polyploidy and subsequent diploidization provide genomic opportunities for evolutionary innovations and adaptation. The researches on duplicated gene evolutionary fates in recurrent polyploids have seriously lagged behind that in paleopolyploids with diploidized genomes. Moreover, the antiviral mechanisms of Viperin remain largely unclear in fish. Here, we elaborate the distinct antiviral mechanisms of two viperin homeologs (Cgviperin-A and Cgviperin-B) in auto-allo-hexaploid gibel carp (Carassius gibelio). First, Cgviperin-A and Cgviperin-B showed differential and biased expression patterns in gibel carp adult tissues. Subsequently, using co-immunoprecipitation (Co-IP) screening analysis, both CgViperin-A and CgViperin-B were found to interact with crucian carp (C. auratus) herpesvirus (CaHV) open reading frame 46 right (ORF46R) protein, a negative herpesvirus regulator of host interferon (IFN) production, and to promote the proteasomal degradation of ORF46R via decreasing K63-linked ubiquitination. Additionally, CgViperin-B also mediated ORF46R degradation through autophagosome pathway, which was absent in CgViperin-A. Moreover, we found that the N-terminal α-helix domain was necessary for the localization of CgViperin-A and CgViperin-B at the endoplasmic reticulum (ER), and the C-terminal domain of CgViperin-A and CgViperin-B was indispensable for the interaction with degradation of ORF46R. Therefore, the current findings clarify the divergent antiviral mechanisms of the duplicated viperin homeologs in a recurrent polyploid fish, which will shed light on the evolution of teleost duplicated genes.
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Affiliation(s)
- Cheng-Yan Mou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Shun Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Long-Feng Lu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yang Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Peng Yu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhi Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Jin-Feng Tong
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Qi-Ya Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhong-Wei Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xiao-Juan Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Guang-Xin Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Li Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.,Hubei Hongshan Laboratory, Chinese Academy of Sciences, Wuhan, China
| | - Jian-Fang Gui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.,Hubei Hongshan Laboratory, Chinese Academy of Sciences, Wuhan, China
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11
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Abstract
Viperin is a gene with a broad spectrum of antiviral functions and various mechanisms of action. The role of viperin in herpes simplex virus type 1 (HSV-1) infection is unclear, with conflicting data in the literature that is derived from a single human cell type. We have addressed this gap by investigating viperin during HSV-1 infection in several cell types, spanning species and including immortalized, non-immortalized and primary cells. We demonstrate that viperin upregulation by HSV-1 infection is cell-type-specific, with mouse cells typically showing greater increases compared with those of human origin. Further, overexpression and knockout of mouse, but not human viperin significantly impedes and increases HSV-1 replication, respectively. In primary mouse fibroblasts, viperin upregulation by infection requires viral gene transcription and occurs in a predominantly IFN-independent manner. Further we identify the N-terminal domain of viperin as being required for the anti-HSV-1 activity. Interestingly, this is the region of viperin that differs most between mouse and human, which may explain the apparent species-specific activity against HSV-1. Finally, we show that HSV-1 virion host shutoff (vhs) protein is a key viral factor that antagonises viperin in mouse cells. We conclude that viperin can be upregulated by HSV-1 in mouse and human cells, and that mouse viperin has anti-HSV-1 activity.
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Affiliation(s)
- Yeu-Yang Tseng
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Anjali Gowripalan
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Sarah N. Croft
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Stewart A. Smith
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Karla J. Helbig
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Si Ming Man
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - David C. Tscharke
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
- *Correspondence: David C. Tscharke,
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12
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Sarkar R, Nandi S, Lo M, Gope A, Chawla-Sarkar M. Viperin, an IFN-Stimulated Protein, Delays Rotavirus Release by Inhibiting Non-Structural Protein 4 (NSP4)-Induced Intrinsic Apoptosis. Viruses 2021; 13:1324. [PMID: 34372530 PMCID: PMC8310278 DOI: 10.3390/v13071324] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 06/19/2021] [Accepted: 06/23/2021] [Indexed: 12/27/2022] Open
Abstract
Viral infections lead to expeditious activation of the host's innate immune responses, most importantly the interferon (IFN) response, which manifests a network of interferon-stimulated genes (ISGs) that constrain escalating virus replication by fashioning an ill-disposed environment. Interestingly, most viruses, including rotavirus, have evolved numerous strategies to evade or subvert host immune responses to establish successful infection. Several studies have documented the induction of ISGs during rotavirus infection. In this study, we evaluated the induction and antiviral potential of viperin, an ISG, during rotavirus infection. We observed that rotavirus infection, in a stain independent manner, resulted in progressive upregulation of viperin at increasing time points post-infection. Knockdown of viperin had no significant consequence on the production of total infectious virus particles. Interestingly, substantial escalation in progeny virus release was observed upon viperin knockdown, suggesting the antagonistic role of viperin in rotavirus release. Subsequent studies unveiled that RV-NSP4 triggered relocalization of viperin from the ER, the normal residence of viperin, to mitochondria during infection. Furthermore, mitochondrial translocation of NSP4 was found to be impeded by viperin, leading to abridged cytosolic release of Cyt c and subsequent inhibition of intrinsic apoptosis. Additionally, co-immunoprecipitation studies revealed that viperin associated with NSP4 through regions including both its radical SAM domain and its C-terminal domain. Collectively, the present study demonstrated the role of viperin in restricting rotavirus egress from infected host cells by modulating NSP4 mediated apoptosis, highlighting a novel mechanism behind viperin's antiviral action in addition to the intricacy of viperin-virus interaction.
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Affiliation(s)
| | | | | | | | - Mamta Chawla-Sarkar
- Division of Virology, National Institute of Cholera and Enteric Diseases, P-33, C.I.T. Road Scheme-XM, Beliaghata, Kolkata 700010, India; (R.S.); (S.N.); (M.L.); (A.G.)
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13
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Grunkemeyer TJ, Ghosh S, Patel AM, Sajja K, Windak J, Basrur V, Kim Y, Nesvizhskii AI, Kennedy RT, Marsh ENG. The antiviral enzyme viperin inhibits cholesterol biosynthesis. J Biol Chem 2021; 297:100824. [PMID: 34029588 PMCID: PMC8254119 DOI: 10.1016/j.jbc.2021.100824] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 04/26/2021] [Accepted: 05/20/2021] [Indexed: 01/02/2023] Open
Abstract
Many enveloped viruses bud from cholesterol-rich lipid rafts on the cell membrane. Depleting cellular cholesterol impedes this process and results in viral particles with reduced viability. Viperin (Virus Inhibitory Protein, Endoplasmic Reticulum-associated, Interferon iNducible) is an endoplasmic reticulum membrane-associated enzyme that exerts broad-ranging antiviral effects, including inhibiting the budding of some enveloped viruses. However, the relationship between viperin expression and the retarded budding of virus particles from lipid rafts on the cell membrane is unclear. Here, we investigated the effect of viperin expression on cholesterol biosynthesis using transiently expressed genes in the human cell line human embryonic kidney 293T (HEK293T). We found that viperin expression reduces cholesterol levels by 20% to 30% in these cells. Following this observation, a proteomic screen of the viperin interactome identified several cholesterol biosynthetic enzymes among the top hits, including lanosterol synthase (LS) and squalene monooxygenase (SM), which are enzymes that catalyze key steps in establishing the sterol carbon skeleton. Coimmunoprecipitation experiments confirmed that viperin, LS, and SM form a complex at the endoplasmic reticulum membrane. While coexpression of viperin was found to significantly inhibit the specific activity of LS in HEK293T cell lysates, coexpression of viperin had no effect on the specific activity of SM, although did reduce SM protein levels by approximately 30%. Despite these inhibitory effects, the coexpression of neither LS nor SM was able to reverse the viperin-induced depletion of cellular cholesterol levels, possibly because viperin is highly expressed in transfected HEK293T cells. Our results establish a link between viperin expression and downregulation of cholesterol biosynthesis that helps explain viperin's antiviral effects against enveloped viruses.
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Affiliation(s)
| | - Soumi Ghosh
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Ayesha M Patel
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Keerthi Sajja
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - James Windak
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Venkatesha Basrur
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Youngsoo Kim
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Alexey I Nesvizhskii
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA; Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan, USA
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - E Neil G Marsh
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA; Department of Biological Chemisrty, University of Michigan, Ann Arbor, Michigan, USA.
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14
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Ebrahimi KH, Gilbert-Jaramillo J, James WS, McCullagh JSO. Interferon-stimulated gene products as regulators of central carbon metabolism. FEBS J 2020; 288:3715-3726. [PMID: 33185982 PMCID: PMC8359365 DOI: 10.1111/febs.15625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/01/2020] [Accepted: 11/09/2020] [Indexed: 02/06/2023]
Abstract
In response to viral infections, the innate immune system rapidly activates expression of several interferon-stimulated genes (ISGs), whose protein and metabolic products are believed to directly interfere with the viral life cycle. Here, we argue that biochemical reactions performed by two specific protein products of ISGs modulate central carbon metabolism to support a broad-spectrum antiviral response. We demonstrate that the metabolites generated by metalloenzymes nitric oxide synthase and the radical S-adenosylmethionine (SAM) enzyme RSAD2 inhibit the activity of the housekeeping and glycolytic enzyme glyceraldehyde 3-phosphate dehydrogenase (GAPDH). We discuss that this inhibition is likely to stimulate a range of metabolic and signalling processes to support a broad-spectrum immune response. Based on these analyses, we propose that inhibiting GAPDH in individuals with deteriorated cellular innate immune response like elderly might help in treating viral diseases such as COVID-19.
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Affiliation(s)
- Kourosh H Ebrahimi
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, UK
| | - Javier Gilbert-Jaramillo
- Sir William Dunn School of Pathology, University of Oxford, UK.,Department of Physiology, Anatomy and Genetics, University of Oxford, UK
| | - William S James
- Sir William Dunn School of Pathology, University of Oxford, UK
| | - James S O McCullagh
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, UK
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15
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Crosse KM, Monson EA, Dumbrepatil AB, Smith M, Tseng YY, Van der Hoek KH, Revill PA, Saker S, Tscharke DC, G Marsh EN, Beard MR, Helbig KJ. Viperin binds STING and enhances the type-I interferon response following dsDNA detection. Immunol Cell Biol 2020; 99:373-391. [PMID: 33131099 DOI: 10.1111/imcb.12420] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 10/14/2020] [Accepted: 10/28/2020] [Indexed: 01/01/2023]
Abstract
Viperin is an interferon-inducible protein that is pivotal for eliciting an effective immune response against an array of diverse viral pathogens. Here we describe a mechanism of viperin's broad antiviral activity by demonstrating the protein's ability to synergistically enhance the innate immune dsDNA signaling pathway to limit viral infection. Viperin co-localized with the key signaling molecules of the innate immune dsDNA sensing pathway, STING and TBK1; binding directly to STING and inducing enhanced K63-linked polyubiquitination of TBK1. Subsequent analysis identified viperin's necessity to bind the cytosolic iron-sulfur assembly component 2A, to prolong its enhancement of the type-I interferon response to aberrant dsDNA. Here we show that viperin facilitates the formation of a signaling enhanceosome, to coordinate efficient signal transduction following activation of the dsDNA signaling pathway, which results in an enhanced antiviral state. We also provide evidence for viperin's radical SAM enzymatic activity to self-limit its immunomodulatory functions. These data further define viperin's role as a positive regulator of innate immune signaling, offering a mechanism of viperin's broad antiviral capacity.
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Affiliation(s)
- Keaton M Crosse
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Ebony A Monson
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Arti B Dumbrepatil
- Department of Chemistry and Biological Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Monique Smith
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Yeu-Yang Tseng
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Kylie H Van der Hoek
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Peter A Revill
- Victorian Infectious Diseases Reference Laboratory, Royal Melbourne Hospital, Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Subir Saker
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - David C Tscharke
- John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - E Neil G Marsh
- Department of Chemistry and Biological Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Michael R Beard
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Karla J Helbig
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
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16
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Ghosh S, Marsh ENG. Viperin: An ancient radical SAM enzyme finds its place in modern cellular metabolism and innate immunity. J Biol Chem 2020; 295:11513-11528. [PMID: 32546482 PMCID: PMC7450102 DOI: 10.1074/jbc.rev120.012784] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/16/2020] [Indexed: 12/13/2022] Open
Abstract
Viperin plays an important and multifaceted role in the innate immune response to viral infection. Viperin is also notable as one of very few radical SAM-dependent enzymes present in higher animals; however, the enzyme appears broadly conserved across all kingdoms of life, which suggests that it represents an ancient defense mechanism against viral infections. Although viperin was discovered some 20 years ago, only recently was the enzyme's structure determined and its catalytic activity elucidated. The enzyme converts CTP to 3'-deoxy-3',4'-didehydro-CTP, which functions as novel chain-terminating antiviral nucleotide when misincorporated by viral RNA-dependent RNA polymerases. Moreover, in higher animals, viperin interacts with numerous other host and viral proteins, and it is apparent that this complex network of interactions constitutes another important aspect of the protein's antiviral activity. An emerging theme is that viperin appears to facilitate ubiquitin-dependent proteasomal degradation of some of the proteins it interacts with. Viperin-targeted protein degradation contributes to the antiviral response either by down-regulating various metabolic pathways important for viral replication or by directly targeting viral proteins for degradation. Here, we review recent advances in our understanding of the structure and catalytic activity of viperin, together with studies investigating the interactions between viperin and its target proteins. These studies have provided detailed insights into the biochemical processes underpinning this unusual enzyme's wide-ranging antiviral activity. We also highlight recent intriguing reports that implicate a broader role for viperin in regulating nonpathological cellular processes, including thermogenesis and protein secretion.
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Affiliation(s)
- Soumi Ghosh
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - E Neil G Marsh
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
- Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan, USA
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17
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Norbury AJ, Calvert JK, Al-Shujairi WH, Cabezas-Falcon S, Tang V, Ong LC, Alonso SL, Smith JR, Carr JM. Dengue virus infects the mouse eye following systemic or intracranial infection and induces inflammatory responses. J Gen Virol 2020; 101:79-85. [PMID: 31774391 DOI: 10.1099/jgv.0.001354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Dengue virus (DENV) infection is associated with clinical ocular presentations and here DENV infection of the eye was assessed in mice. In an AG129 mouse model of antibody-dependent enhancement of DENV infection, DENV RNA was detected in the eye and vascular changes were present in the retinae. Intraocular CD8 and IFN-γ mRNA were increased in mice born to DENV-naïve, but not DENV-immune mothers, while TNF-α mRNA was induced and significantly higher in mice born to DENV-immune than DENV-naïve mothers. DENV RNA was detected in the eye following intracranial DENV infection and CD8 mRNA but not IFN-γ nor TNF-α were induced. In all models, viperin was increased following DENV infection. Thus, DENV in the circulation or the brain can infect the eye and stimulate innate immune responses, with induction of viperin as one response that consistently occurs in multiple DENV eye-infection models in both an IFN-dependent and independent manner.
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Affiliation(s)
- Aidan J Norbury
- Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Julie K Calvert
- Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Wisam H Al-Shujairi
- Department of Laboratory and Clinical Sciences, College of Pharmacy, University of Babylon, Hilla 51002, Iraq.,Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Sheila Cabezas-Falcon
- Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Victoria Tang
- Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Li Ching Ong
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, and Immunology programme, Life Sciences Institute, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore
| | - Sylvie L Alonso
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, and Immunology programme, Life Sciences Institute, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore
| | - Justine R Smith
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
| | - Jillian M Carr
- Microbiology and Infectious Diseases, College of Medicine and Public Health, Flinders University, Bedford Park, Adelaide, 5042, Australia
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18
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Pietrzak A, Kalinowska-Łyszczarz A, Osztynowicz K, Khamidulla A, Kozubski W, Michalak S. A long-term follow-up study on biochemical and clinical biomarkers of response to interferon beta-1b treatment in relapsing-remitting multiple sclerosis. ADV CLIN EXP MED 2020; 29:841-851. [PMID: 32500977 DOI: 10.17219/acem/121063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND While interferon beta-1b (IFN-β-1b) is still a commonly used disease-modifying drug in the treatment of multiple sclerosis (MS), therapeutic possibilities are expanding, and treatment failure should be identified early. Markers to predict response to IFN-β-1b, either clinical or biochemical, are therefore urgently needed. Interferon-induced proteins, including viperin, suppressor of cytokine signaling 3 (SOCS3), ubiquitin specific peptidase-18 (USP18), and myxovirus resistance protein A (MxA), are possible markers of IFN-β-1b bioavailability and treatment response. OBJECTIVES To evaluate viperin, SOCS3, USP18 and MxA as markers of treatment response in Polish IFN-β-1btreated patients with MS. MATERIAL AND METHODS In 45 IFN-β-1b-treated Polish patients with MS, serum concentrations of viperin, SOCS3, USP18, and MxA were assessed before and after 24 months of IFN-β-1b treatment. The patients were followed clinically and with magnetic resonance imaging (MRI) for a median of 6.8 years. RESULTS Low viperin, USP18 and MxA at baseline and 24 months and high SOCS3 at 24 months correlated with higher disease activity up to the 6th year of observation, but only baseline MxA and USP18 were independently related to outcome, with higher concentrations predicting less disease activity in the first 3 years and after the 1st year, respectively. CONCLUSIONS We confirm the predictive value of MxA and propose USP18 as a possible new prognostic biomarker in IFN-β-1btreated MS patients.
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Affiliation(s)
- Anna Pietrzak
- Department of Neurology, Poznan University of Medical Sciences, Poland
| | - Alicja Kalinowska-Łyszczarz
- Department of Neurochemistry and Neuropathology, Department of Neurology, Poznan University of Medical Sciences, Poland
| | - Krystyna Osztynowicz
- Department of Neurochemistry and Neuropathology, Department of Neurology, Poznan University of Medical Sciences, Poland
| | - Alima Khamidulla
- Department of Neurology, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan
| | - Wojciech Kozubski
- Department of Neurology, Poznan University of Medical Sciences, Poland
| | - Sławomir Michalak
- Department of Neurochemistry and Neuropathology, Department of Neurology, Poznan University of Medical Sciences, Poland
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19
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Abstract
Most cells respond to viral infections by activating innate immune pathways that lead to the induction of antiviral restriction factors. One such factor, viperin, was discovered almost two decades ago based on its induction during viral infection. Since then, viperin has been shown to possess activity against numerous viruses via multiple proposed mechanisms. Most recently, however, viperin was demonstrated to catalyze the conversion of cytidine triphosphate (CTP) to 3'-deoxy-3',4'-didehydro-CTP (ddhCTP), a previously unknown ribonucleotide. Incorporation of ddhCTP causes premature termination of RNA synthesis by the RNA-dependent RNA polymerase of some viruses. To date, production of ddhCTP by viperin represents the only activity of viperin that links its enzymatic activity directly to an antiviral mechanism in human cells. This review examines the multiple antiviral mechanisms and biological functions attributed to viperin.
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Affiliation(s)
- Efraín E Rivera-Serrano
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA;
| | - Anthony S Gizzi
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA; , .,Department of Pharmacology, Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Jamie J Arnold
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA;
| | - Tyler L Grove
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA; ,
| | - Steven C Almo
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA; ,
| | - Craig E Cameron
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA;
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20
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Honarmand Ebrahimi K, Rowbotham JS, McCullagh J, James WS. Mechanism of Diol Dehydration by a Promiscuous Radical-SAM Enzyme Homologue of the Antiviral Enzyme Viperin (RSAD2). Chembiochem 2020; 21:1605-1612. [PMID: 31951306 DOI: 10.1002/cbic.201900776] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 12/30/2022]
Abstract
3'-Deoxynucleotides are an important class of drugs because they interfere with the metabolism of nucleotides, and their incorporation into DNA or RNA terminates cell division and viral replication. These compounds are generally produced by multi-step chemical synthesis, and an enzyme with the ability to catalyse the removal of the 3'-deoxy group from different nucleotides has yet to be described. Here, using a combination of HPLC, HRMS and NMR spectroscopy, we demonstrate that a thermostable fungal radical S-adenosylmethionine (SAM) enzyme, with similarity to the vertebrate antiviral enzyme viperin (RSAD2), can catalyse the transformation of CTP, UTP and 5-bromo-UTP to their 3'-deoxy-3',4'-didehydro (ddh) analogues. We show that, unlike the fungal enzyme, human viperin only catalyses the transformation of CTP to ddhCTP. Using electron paramagnetic resonance spectroscopy and molecular docking and dynamics simulations in combination with mutagenesis studies, we provide insight into the origin of the unprecedented substrate promiscuity of the enzyme and the mechanism of dehydration of a nucleotide. Our findings highlight the evolution of substrate specificity in a member of the radical-SAM enzymes. We predict that our work will help in using a new class of the radical-SAM enzymes for the biocatalytic synthesis of 3'-deoxy nucleotide/nucleoside analogues.
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Affiliation(s)
- Kourosh Honarmand Ebrahimi
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, OX1 3TA, Oxford, UK
| | - Jack S Rowbotham
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, OX1 3TA, Oxford, UK
| | - James McCullagh
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, OX1 3TA, Oxford, UK
| | - William S James
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, OX1 3RE, Oxford, UK
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21
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Ebrahimi KH, Howie D, Rowbotham JS, McCullagh J, Armstrong FA, James WS. Viperin, through its radical-SAM activity, depletes cellular nucleotide pools and interferes with mitochondrial metabolism to inhibit viral replication. FEBS Lett 2020; 594:1624-1630. [PMID: 32061099 DOI: 10.1002/1873-3468.13761] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 12/11/2022]
Abstract
Viperin (RSAD2) is an antiviral radical S-adenosylmethionine (SAM) enzyme highly expressed in different cell types upon viral infection. Recently, it has been reported that the radical-SAM activity of viperin transforms cytidine triphosphate (CTP) to its analogue 3'-deoxy-3',4'-didehydro-CTP (ddhCTP). Based on biochemical studies and cell biological experiments, it was concluded that ddhCTP and its nucleoside form ddhC do not affect the cellular concentration of nucleotide triphosphates and that ddhCTP acts as replication chain terminator. However, our re-evaluation of the reported data and new results indicate that ddhCTP is not an effective viral chain terminator but depletes cellular nucleotide pools and interferes with mitochondrial activity to inhibit viral replication. Our analysis is consistent with a unifying view of the antiviral and radical-SAM activities of viperin.
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Affiliation(s)
| | - Duncan Howie
- Sir William Dunn School of Pathology, University of Oxford, UK
| | | | | | | | - William S James
- Sir William Dunn School of Pathology, University of Oxford, UK
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22
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Dumbrepatil AB, Zegalia KA, Sajja K, Kennedy RT, Marsh ENG. Targeting viperin to the mitochondrion inhibits the thiolase activity of the trifunctional enzyme complex. J Biol Chem 2020; 295:2839-2849. [PMID: 31980458 DOI: 10.1074/jbc.ra119.011526] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/09/2020] [Indexed: 12/20/2022] Open
Abstract
Understanding the mechanisms by which viruses evade host cell immune defenses is important for developing improved antiviral therapies. In an unusual twist, human cytomegalovirus co-opts the antiviral radical SAM enzyme viperin (virus-inhibitory protein, endoplasmic reticulum-associated, interferon-inducible) to enhance viral infectivity. This process involves translocation of viperin to the mitochondrion, where it binds the β-subunit (HADHB) of the mitochondrial trifunctional enzyme complex that catalyzes thiolysis of β-ketoacyl-CoA esters as part of fatty acid β-oxidation. Here we investigated how the interaction between these two enzymes alters their activities and affects cellular ATP levels. Experiments with purified enzymes indicated that viperin inhibits the thiolase activity of HADHB, but, unexpectedly, HADHB activates viperin, leading to synthesis of the antiviral nucleotide 3'-deoxy-3',4'-didehydro-CTP. Measurements of enzyme activities in lysates prepared from transfected HEK293T cells expressing these enzymes mirrored the findings obtained with purified enzymes. Thus, localizing viperin to mitochondria decreased thiolase activity, and coexpression of HADHB significantly increased viperin activity. Furthermore, targeting viperin to mitochondria also increased the rate at which HADHB is retrotranslocated out of mitochondria and degraded, providing an additional mechanism by which viperin reduces HADHB activity. Targeting viperin to mitochondria decreased cellular ATP levels by more than 50%, consistent with the enzyme disrupting fatty acid catabolism. These results provide biochemical insight into the mechanism by which human cytomegalovirus subverts viperin; they also provide a biochemical rationale for viperin's recently discovered role in regulating thermogenesis in adipose tissues.
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Affiliation(s)
- Arti B Dumbrepatil
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Kelcie A Zegalia
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Keerthi Sajja
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - E Neil G Marsh
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055; Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055.
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23
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Li M, Liao Z, Xu Z, Zou X, Wang Y, Peng H, Li Y, Ou X, Deng Y, Guo Y, Gan W, Peng T, Chen D, Cai M. The Interaction Mechanism Between Herpes Simplex Virus 1 Glycoprotein D and Host Antiviral Protein Viperin. Front Immunol 2019; 10:2810. [PMID: 31921110 PMCID: PMC6917645 DOI: 10.3389/fimmu.2019.02810] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 11/15/2019] [Indexed: 12/17/2022] Open
Abstract
Viperin is an interferon-inducible protein that responsible for a variety of antiviral responses to different viruses. Our previous study has shown that the ribonuclease UL41 of herpes simplex virus 1 (HSV-1) can degrade the mRNA of viperin to promote HSV-1 replication. However, it is not clear whether other HSV-1 encoded proteins can regulate the function of viperin. Here, one novel viperin associated protein, glycoprotein D (gD), was identified. To verify the interaction between gD and viperin, gD and viperin expression plasmids were firstly co-transfected into COS-7 cells, and fluorescence microscope showed they co-localized at the perinuclear region, then this potential interaction was confirmed by co-immunoprecipitation (Co-IP) assays. Moreover, confocal microscopy demonstrated that gD and viperin co-localized at the Golgi body and lipid droplets. Furthermore, dual-luciferase reporter and Co-IP assays showed gD and viperin interaction leaded to the increase of IRF7-mediated IFN-β expression through promoting viperin and IRAK1 interaction and facilitating K63-linked IRAK1 polyubiquitination. Nevertheless, gD inhibited TRAF6-induced NF-κB activity by decreasing the interaction of viperin and TRAF6. In addition, gD restrained viperin-mediated interaction between IRAK1 and TRAF6. Eventually, gD and viperin interaction was corroborated to significantly inhibit the proliferation of HSV-1. Taken together, this study would open up new avenues toward delineating the function and physiological significance of gD and viperin during HSV-1 replication cycle.
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Affiliation(s)
- Meili Li
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Zongmin Liao
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China.,Department of Scientific Research and Education, Yuebei People's Hospital, Shaoguan, China
| | - Zuo Xu
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Xingmei Zou
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Yuanfang Wang
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Hao Peng
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Yiwen Li
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Xiaowen Ou
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Yangxi Deng
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Yingjie Guo
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Weidong Gan
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Tao Peng
- State Key Laboratory of Respiratory Diseases, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China.,South China Vaccine Corporation Limited, Guangzhou, China
| | - Daixiong Chen
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
| | - Mingsheng Cai
- Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China
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24
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Galvin HD, Husain M. Influenza A virus-induced host caspase and viral PA-X antagonize the antiviral host factor, histone deacetylase 4. J Biol Chem 2019; 294:20207-20221. [PMID: 31757810 DOI: 10.1074/jbc.ra119.010650] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 11/05/2019] [Indexed: 12/22/2022] Open
Abstract
Influenza A virus (IAV) effectively manipulates host machinery to replicate. There is a growing evidence that an optimal acetylation environment in the host cell is favorable to IAV proliferation and vice versa. The histone deacetylases (HDACs), a family of 18 host enzymes classified into four classes, are central to negatively regulating the acetylation level, hence the HDACs would not be favorable to IAV. Indeed, by using the RNAi and overexpression strategies, we found that human HDAC4, a class II member, possesses anti-IAV properties and is a component of host innate antiviral response. We discovered that IAV multiplication was augmented in HDAC4-depleted cells and abated in HDAC4-supplemented cells. Likewise, the expression of IFITM3, ISG15, and viperin, some of the critical markers of host anti-IAV response was abated in HDAC4-depleted cells and augmented in HDAC4-supplemented cells. In turn, IAV strongly antagonizes the HDAC4, by down-regulating its expression both at the mRNA level via viral RNA endonuclease PA-X and at the polypeptide level by inducing its cleavage via host caspase 3 in infected cells. Such HDAC4 polypeptide cleavage resulted in a ∼30 kDa fragment that is also observed in some heterologous systems and may have a significant role in IAV replication.
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Affiliation(s)
- Henry D Galvin
- Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand
| | - Matloob Husain
- Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand
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25
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Xu C, Feng L, Chen P, Li A, Guo S, Jiao X, Zhang C, Zhao Y, Jin X, Zhong K, Guo Y, Zhu H, Han L, Yang G, Li H, Wang Y. Viperin inhibits classical swine fever virus replication by interacting with viral nonstructural 5A protein. J Med Virol 2019; 92:149-160. [PMID: 31517388 DOI: 10.1002/jmv.25595] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 09/09/2019] [Indexed: 01/18/2023]
Abstract
Classical swine fever virus (CSFV) is a single-stranded RNA flavivirus that can cause serious diseases in porcine species, including symptoms of infarction, systemic hemorrhage, high fever, or depression. Viperin is an important interferon-inducible antiviral gene that has been shown to inhibit CSFV, but the exact mechanisms by which it is able to do so remain poorly characterized. In the present study, we determined that CSFV infection led to viperin upregulation in PK-15 cells (porcine kidney cell). When viperin was overexpressed in these cells, this markedly attenuated CSFV replication, with clear reductions in viral copy number after 12 to 48 hours postinfection. Immunofluorescence microscopy revealed that the viral NS5A protein colocalized with viperin in infected cells, and this was confirmed via confocal laser scanning microscopy using labeled versions of these proteins, and by co-immunoprecipitation which confirmed that NS5A directly interacts with viperin. When NS5A was overexpressed, this inhibited the replication of CSFV, and we determined that the radical SAM domain and N-terminal domain of viperin was critical for its ability to bind to NS5A, with the latter being most important for this interaction. Together, our in vitro results highlight a potential mechanism whereby viperin is able to inhibit CSFV replication. These results have the potential to assist future efforts to prevent or treat systemic CSFV-induced disease, and may also offer more general insights into the antiviral role of viperin in innate immunity.
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Affiliation(s)
- Chunmei Xu
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Luping Feng
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Peige Chen
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Anqi Li
- School of literature, Zhengzhou Sias University, Xinzheng, Henan, China
| | - Shuang Guo
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Xianqin Jiao
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Chengyu Zhang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yunze Zhao
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Xiangyang Jin
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Kai Zhong
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yujie Guo
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Heshui Zhu
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Liqiang Han
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Guoyu Yang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Heping Li
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yueying Wang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan, China
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26
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Hwang JW, Lee KJ, Choi IH, Han HM, Kim TH, Lee SH. Decreased expression of type I (IFN-β) and type III (IFN-λ) interferons and interferon-stimulated genes in patients with chronic rhinosinusitis with and without nasal polyps. J Allergy Clin Immunol 2019; 144:1551-1565.e2. [PMID: 31449915 PMCID: PMC7111475 DOI: 10.1016/j.jaci.2019.08.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/21/2019] [Accepted: 08/02/2019] [Indexed: 12/15/2022]
Abstract
Background Little is known about antiviral responses in the sinonasal mucosal tissue of patients with chronic rhinosinusitis (CRS). Objective we investigated the presence of virus and the expression of Toll-like receptor (TLR) 3, TLR7, and interferon and interferon-stimulated genes (ISGs) in healthy mucosal tissue of control subjects and the inflammatory sinus mucosal tissue of CRS patients, and evaluated whether levels of interferons and ISGs might be affected by CRS-related cytokines and by treatment with macrolides, dexamethasone, or TLR3 and TLR7 agonists. Methods The presence of virus in the sinonasal mucosa was evaluated with real-time PCR. The expression of interferons and ISGs in the sinonasal mucosa and in cultured epithelial cells treated with TH1 and TH2 cytokines, macrolides, dexamethasone, or TLR3 and TLR7 agonists were evaluated with real-time PCR and Western blotting. The expression of TLR3 and TLR7 in the sinonasal mucosa were evaluated with immunohistochemistry. Results Respiratory viruses were detected in 15% of samples. Interferons and ISGs are expressed in normal mucosa, but their levels were decreased in patients with CRS. Interferon and ISG levels were upregulated in cells treated with macrolides, dexamethasone, or TLR3 agonist, but some were decreased in cytokine-treated cells. TLR3 and TLR7 levels showed no significant difference between normal and inflammatory sinus mucosal tissue. Conclusion These results suggest that decreased levels of interferons and ISGs in patients with CRS might contribute to impairment of the antiviral innate response in inflammatory sinonasal epithelial cells. Macrolides and glucocorticoids might provide positive effects on the treatment of CRS by upregulating interferon and ISG expression.
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Affiliation(s)
- Jae Woong Hwang
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
| | - Ki Jeong Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
| | - In Hak Choi
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
| | - Hye Min Han
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
| | - Tae Hoon Kim
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
| | - Sang Hag Lee
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea.
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27
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Eom J, Kim JJ, Yoon SG, Jeong H, Son S, Lee JB, Yoo J, Seo HJ, Cho Y, Kim KS, Choi KM, Kim IY, Lee HY, Nam KT, Cresswell P, Seong JK, Seo JY. Intrinsic expression of viperin regulates thermogenesis in adipose tissues. Proc Natl Acad Sci U S A 2019; 116:17419-28. [PMID: 31341090 DOI: 10.1073/pnas.1904480116] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Viperin is an interferon (IFN)-inducible multifunctional protein. Recent evidence from high-throughput analyses indicates that most IFN-inducible proteins, including viperin, are intrinsically expressed in specific tissues; however, the respective intrinsic functions are unknown. Here we show that the intrinsic expression of viperin regulates adipose tissue thermogenesis, which is known to counter metabolic disease and contribute to the febrile response to pathogen invasion. Viperin knockout mice exhibit increased heat production, resulting in a reduction of fat mass, improvement of high-fat diet (HFD)-induced glucose tolerance, and enhancement of cold tolerance. These thermogenic phenotypes are attributed to an adipocyte-autonomous mechanism that regulates fatty acid β-oxidation. Under an HFD, viperin expression is increased, and its function is enhanced. Our findings reveal the intrinsic function of viperin as a novel mechanism regulating thermogenesis in adipose tissues, suggesting that viperin represents a molecular target for thermoregulation in clinical contexts.
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28
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Vanwalscappel B, Gadea G, Desprès P. A Viperin Mutant Bearing the K358R Substitution Lost its Anti-ZIKA Virus Activity. Int J Mol Sci 2019; 20:ijms20071574. [PMID: 30934824 PMCID: PMC6480927 DOI: 10.3390/ijms20071574] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/01/2019] [Accepted: 03/26/2019] [Indexed: 12/17/2022] Open
Abstract
Interferon-induced viperin (VP) was identified as playing an important role in the innate immune response against Zika virus (ZIKV). The 361 amino acid long human VP protein comprises of a highly conserved C-terminal region, which has been associated with VP antiviral properties against ZIKV. In the present study, we sought to determine whether the very last C-terminal amino-acid residues of VP might play a role in VP-mediated ZIKV inhibition. To address this issue, a recombinant human viperin (rVPwt) was overexpressed by transfection in human epithelial A549 cells. We confirmed that transient overexpression of rVPwt prior to ZIKV infection dramatically reduced viral replication in A549 cells. Deletion of the last 17 C-terminal amino acids of VP resulted in a higher expression level of mutant protein compared to wild-type VP. Mutational analysis revealed that residue substitution at positions 356 to 360 with five alanine led to the same phenotype. The charged residues Asp356, Lys358, and Asp360 were then identified to play a role in the weak level of VPwt protein in A549 cells. Mutant VP bearing the D360A substitution partially rescued ZIKV growth in A549 cells. Remarkably, a single Lys-to-Arg substitution at position 358 was sufficient to abrogate VP antiviral activity against ZIKV. In conclusion, our study showed that Asp356, Lys358, and Asp360 may have an influence on biochemical properties of VP. Our major finding was that Lys358 was a key amino-acid in VP antiviral properties against ZIKV.
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Affiliation(s)
- Bénédicte Vanwalscappel
- Université de La Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Plateforme Technologique CYROI, 97491 Sainte-Clotilde, La Réunion, France.
| | - Gilles Gadea
- Université de La Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Plateforme Technologique CYROI, 97491 Sainte-Clotilde, La Réunion, France.
| | - Philippe Desprès
- Université de La Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Plateforme Technologique CYROI, 97491 Sainte-Clotilde, La Réunion, France.
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29
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Steinbusch MMF, Caron MMJ, Surtel DAM, van den Akker GGH, van Dijk PJ, Friedrich F, Zabel B, van Rhijn LW, Peffers MJ, Welting TJM. The antiviral protein viperin regulates chondrogenic differentiation via CXCL10 protein secretion. J Biol Chem 2019; 294:5121-5136. [PMID: 30718282 PMCID: PMC6442052 DOI: 10.1074/jbc.ra119.007356] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 01/29/2019] [Indexed: 01/10/2023] Open
Abstract
Viperin (also known as radical SAM domain–containing 2 (RSAD2)) is an interferon-inducible and evolutionary conserved protein that participates in the cell's innate immune response against a number of viruses. Viperin mRNA is a substrate for endoribonucleolytic cleavage by RNase mitochondrial RNA processing (MRP) and mutations in the RNase MRP small nucleolar RNA (snoRNA) subunit of the RNase MRP complex cause cartilage-hair hypoplasia (CHH), a human developmental condition characterized by metaphyseal chondrodysplasia and severe dwarfism. It is unknown how CHH-pathogenic mutations in RNase MRP snoRNA interfere with skeletal development, and aberrant processing of RNase MRP substrate RNAs is thought to be involved. We hypothesized that viperin plays a role in chondrogenic differentiation. Using immunohistochemistry, real-time quantitative PCR, immunoblotting, ELISA, siRNA-mediated gene silencing, plasmid-mediated gene overexpression, label-free MS proteomics, and promoter reporter bioluminescence assays, we discovered here that viperin is expressed in differentiating chondrocytic cells and regulates their protein secretion and the outcome of chondrogenic differentiation by influencing transforming growth factor β (TGF-β)/SMAD family 2/3 (SMAD2/3) activity via C-X-C motif chemokine ligand 10 (CXCL10). Of note, we observed disturbances in this viperin–CXCL10–TGF-β/SMAD2/3 axis in CHH chondrocytic cells. Our results indicate that the antiviral protein viperin controls chondrogenic differentiation by influencing secretion of soluble proteins and identify a molecular route that may explain impaired chondrogenic differentiation of cells from individuals with CHH.
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Affiliation(s)
- Mandy M F Steinbusch
- From the Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery and
| | - Marjolein M J Caron
- From the Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery and
| | - Don A M Surtel
- From the Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery and
| | | | - Paul J van Dijk
- the Department of Anatomy and Embryology, Maastricht University, NL-6202 AZ Maastricht, The Netherlands
| | - Franziska Friedrich
- the University Heart Centre Freiburg, Faculty of Medicine, University of Freiburg, Institute for Experimental Cardiovascular Medicine, 79110 Freiburg, Germany
| | - Bernhard Zabel
- the Medical Faculty, Otto van Guericke University of Magdeburg, 39106 Magdeburg, Germany, and
| | - Lodewijk W van Rhijn
- From the Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery and
| | - Mandy J Peffers
- the Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Tim J M Welting
- From the Laboratory for Experimental Orthopedics, Department of Orthopedic Surgery and
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Wei C, Zheng C, Sun J, Luo D, Tang Y, Zhang Y, Ke X, Liu Y, Zheng Z, Wang H. Viperin Inhibits Enterovirus A71 Replication by Interacting with Viral 2C Protein. Viruses 2018; 11:E13. [PMID: 30587778 DOI: 10.3390/v11010013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/21/2018] [Accepted: 12/22/2018] [Indexed: 12/17/2022] Open
Abstract
Enterovirus A71 (EVA71) is a human enterovirus belonging to the Picornaviridae family and mostly causes hand-foot-and-mouth disease in infants. Viperin is an important interferon-stimulated gene with a broad antiviral activity against various viruses. However, the effect of viperin on human enteroviruses and the interaction mechanism between EVA71 and viperin remains elusive. Here, we confirmed the EVA71-induced expression of viperin in a mouse model and cell lines and showed that viperin upregulation by EVA71 infection occurred on both the mRNA and protein level. Viperin knockdown and overexpression in EVA71-infected cells indicated that this protein can markedly inhibit EVA71 infection. Interestingly, immunofluorescent confocal microscopy and co-immunoprecipitation assays indicated that viperin interacts and colocalizes with the EVA71 protein 2C in the endoplasmic reticulum. Furthermore, amino acids 50⁻60 in the N-terminal domain of viperin were the key residues responsible for viperin interaction with 2C. More importantly, the N-terminal domain of viperin was found responsible for inhibiting EVA71 replication. Our findings can potentially aid future research on the prevention and treatment of nervous system damage caused by EVA71 and may provide a potential target for antiviral therapy.
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Nutsford AN, Galvin HD, Ahmed F, Husain M. The Class IV human deacetylase, HDAC11, exhibits anti-influenza A virus properties via its involvement in host innate antiviral response. Cell Microbiol 2018; 21:e12989. [PMID: 30511515 DOI: 10.1111/cmi.12989] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/06/2018] [Accepted: 11/22/2018] [Indexed: 01/01/2023]
Abstract
Histone deacetylase 11 (HDAC11) is most recently discovered deacetylase. Here, we demonstrate that human HDAC11 exhibits anti-influenza A virus (IAV) properties. We found that knockdown of HDAC11 expression augments IAV growth kinetics in human lung epithelial cells A549 by up to 1 log. One of the ways HDAC11 exerts its anti-IAV function is by being a part of IAV-induced host antiviral response. We found that the kinetics of both IAV- and interferon-induced innate antiviral response is significantly delayed in HDAC11-depleted cells. Further, in the absence of HDAC11 expression, there was a significant decrease in the expression of interferon-stimulated genes-IFITM3, ISG15, and viperin-previously implicated in anti-IAV function. One of the ways IAV antagonises HDAC11 is by downregulating its expression in host cells. We found that there was up to 93% reduction in HDAC11 transcript levels in A549 cells in response to IAV infection. HDAC11 is the smallest HDAC with majority of its polypeptide assigned to catalytic domain. Evolutionarily, it seems to be the least evolved and most closely related to common ancestral HDAC gene(s). Furthermore, HDAC11 has also been described as a deacylase. Therefore, our findings present exciting prospects for further investigations into significance of HDAC11 in virus infections.
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Affiliation(s)
- Ashley N Nutsford
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Henry D Galvin
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Farjana Ahmed
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Matloob Husain
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
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Zobel S, Lorenz M, Frascaroli G, Böhnke J, Bilz NC, Stanifer ML, Boulant S, Bergs S, Liebert UG, Claus C. Rubella Virus Strain-Associated Differences in the Induction of Oxidative Stress Are Independent of Their Interferon Activation. Viruses 2018; 10:v10100540. [PMID: 30282907 PMCID: PMC6213305 DOI: 10.3390/v10100540] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 09/26/2018] [Accepted: 09/28/2018] [Indexed: 01/16/2023] Open
Abstract
Rubella virus (RV) infection impacts cellular metabolic activity in a complex manner with strain-specific nutritional requirements. Here we addressed whether this differential metabolic influence was associated with differences in oxidative stress induction and subsequently with innate immune response activation. The low passaged clinical isolates of RV examined in this study induced oxidative stress as validated through generation of the reactive oxygen species (ROS) cytoplasmic hydrogen peroxide and mitochondrial superoxide. The addition of the cytoplasmic and mitochondrial ROS scavengers N-acetyl-l-cysteine and MitoTEMPO, respectively, reduced RV-associated cytopathogenicity and caspase activation. While the degree of oxidative stress induction varied among RV clinical isolates, the level of innate immune response and interferon-stimulated gene activation was comparable. The type III IFNs were highly upregulated in all cell culture systems tested. However, only pre-stimulation with IFN β slightly reduced RV replication indicating that RV appears to have evolved the ability to counteract innate immune response mechanisms. Through the data presented, we showed that the ability of RV to induce oxidative stress was independent of its capacity to stimulate and counteract the intrinsic innate immune response.
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Affiliation(s)
- Sarah Zobel
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Mechthild Lorenz
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Giada Frascaroli
- Leibniz Institute for Experimental Virology, Heinrich Pette Institute, 20251 Hamburg, Germany.
| | - Janik Böhnke
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Nicole C Bilz
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Megan L Stanifer
- Schaller Research Group at CellNetworks, Department of Infectious Diseases, Virology, Heidelberg University Hospital, 69120 Heidelberg, Germany.
| | - Steeve Boulant
- Schaller Research Group at CellNetworks, Department of Infectious Diseases, Virology, Heidelberg University Hospital, 69120 Heidelberg, Germany.
- Research Group "Cellular Polarity and Viral Infection" (F140), German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany.
| | - Sandra Bergs
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Uwe G Liebert
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
| | - Claudia Claus
- Institute of Virology, University of Leipzig, 04103 Leipzig, Germany.
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33
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Chakravarti A, Selvadurai K, Shahoei R, Lee H, Fatma S, Tajkhorshid E, Huang RH. Reconstitution and substrate specificity for isopentenyl pyrophosphate of the antiviral radical SAM enzyme viperin. J Biol Chem 2018; 293:14122-14133. [PMID: 30030381 DOI: 10.1074/jbc.ra118.003998] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/11/2018] [Indexed: 01/09/2023] Open
Abstract
Viperin is a radical SAM enzyme that has been shown to possess antiviral activity against a broad spectrum of viruses; however, its molecular mechanism is unknown. We report here that recombinant fungal and archaeal viperin enzymes catalyze the addition of the 5'-deoxyadenosyl radical (5'-dA•) to the double bond of isopentenyl pyrophosphate (IPP), producing a new compound we named adenylated isopentyl pyrophosphate (AIPP). The reaction is specific for IPP, as other pyrophosphate compounds involved in the mevalonate biosynthetic pathway did not react with 5'-dA• Enzymatic reactions employing IPP derivatives as substrates revealed that any chemical change in IPP diminishes its ability to be an effective substrate of fungal viperin. Mutational studies disclosed that the hydroxyl group on the side chain of Tyr-245 in fungal viperin is the likely source of hydrogen in the last step of the radical addition, providing mechanistic insight into the radical reaction catalyzed by fungal viperin. Structure-based molecular dynamics (MD) simulations of viperin interacting with IPP revealed a good fit of the isopentenyl motif of IPP to the active site cavity of viperin, unraveling the molecular basis of substrate specificity of viperin for IPP. Collectively, our findings indicate that IPP is an effective substrate of fungal and archaeal viperin enzymes and provide critical insights into the reaction mechanism.
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Affiliation(s)
| | | | - Rezvan Shahoei
- Physics.,the Beckman Institute for Advanced Science and Technology, and
| | - Hugo Lee
- From the Departments of Biochemistry and
| | | | - Emad Tajkhorshid
- From the Departments of Biochemistry and.,the Beckman Institute for Advanced Science and Technology, and.,the Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Raven H Huang
- From the Departments of Biochemistry and .,the Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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Abstract
Flaviviruses are globally distributed pathogens causing millions of human infections every year. Flaviviruses are arthropod-borne viruses and are mainly transmitted by either ticks or mosquitoes. Mosquito-borne flaviviruses and their interactions with the innate immune response have been well-studied and reviewed extensively, thus this review will discuss tick-borne flaviviruses and their interactions with the host innate immune response.
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Affiliation(s)
- Richard Lindqvist
- Department of Clinical Microbiology, Virology, Umeå University, SE-90185 Umeå, Sweden.
- Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, SE-90187 Umeå, Sweden.
- Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187 Umeå, Sweden.
| | - Arunkumar Upadhyay
- Department of Clinical Microbiology, Virology, Umeå University, SE-90185 Umeå, Sweden.
- Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, SE-90187 Umeå, Sweden.
- Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187 Umeå, Sweden.
| | - Anna K Överby
- Department of Clinical Microbiology, Virology, Umeå University, SE-90185 Umeå, Sweden.
- Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, SE-90187 Umeå, Sweden.
- Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187 Umeå, Sweden.
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35
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Panayiotou C, Lindqvist R, Kurhade C, Vonderstein K, Pasto J, Edlund K, Upadhyay AS, Överby AK. Viperin Restricts Zika Virus and Tick-Borne Encephalitis Virus Replication by Targeting NS3 for Proteasomal Degradation. J Virol 2018; 92:e02054-17. [PMID: 29321318 DOI: 10.1128/JVI.02054-17] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 12/22/2017] [Indexed: 12/22/2022] Open
Abstract
Flaviviruses are arthropod-borne viruses that constitute a major global health problem, with millions of human infections annually. Their pathogenesis ranges from mild illness to severe manifestations such as hemorrhagic fever and fatal encephalitis. Type I interferons (IFNs) are induced in response to viral infection and stimulate the expression of interferon-stimulated genes (ISGs), including that encoding viperin (virus-inhibitory protein, endoplasmic reticulum associated, IFN inducible), which shows antiviral activity against a broad spectrum of viruses, including several flaviviruses. Here we describe a novel antiviral mechanism employed by viperin against two prominent flaviviruses, tick-borne encephalitis virus (TBEV) and Zika virus (ZIKV). Viperin was found to interact and colocalize with the structural proteins premembrane (prM) and envelope (E) of TBEV, as well as with nonstructural (NS) proteins NS2A, NS2B, and NS3. Interestingly, viperin expression reduced the NS3 protein level, and the stability of the other interacting viral proteins, but only in the presence of NS3. We also found that although viperin interacted with NS3 of mosquito-borne flaviviruses (ZIKV, Japanese encephalitis virus, and yellow fever virus), only ZIKV was sensitive to the antiviral effect of viperin. This sensitivity correlated with viperin's ability to induce proteasome-dependent degradation of NS3. ZIKV and TBEV replication was rescued completely when NS3 was overexpressed, suggesting that the viral NS3 is the specific target of viperin. In summary, we present here a novel antiviral mechanism of viperin that is selective for specific viruses in the genus Flavivirus, affording the possible availability of new drug targets that can be used for therapeutic intervention.IMPORTANCE Flaviviruses are a group of enveloped RNA viruses that cause severe diseases in humans and animals worldwide, but no antiviral treatment is yet available. Viperin, a host protein produced in response to infection, effectively restricts the replication of several flaviviruses, but the exact molecular mechanisms have not been elucidated. Here we have identified a novel mechanism employed by viperin to inhibit the replication of two flaviviruses: tick-borne encephalitis virus (TBEV) and Zika virus (ZIKV). Viperin induced selective degradation via the proteasome of TBEV and ZIKV nonstructural 3 (NS3) protein, which is involved in several steps of the viral life cycle. Furthermore, viperin also reduced the stability of several other viral proteins in a NS3-dependent manner, suggesting a central role of NS3 in viperin's antiflavivirus activity. Taking the results together, our work shows important similarities and differences among the members of the genus Flavivirus and could lead to the possibility of therapeutic intervention.
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36
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Mikulecky P, Andreeva E, Amara P, Weissenhorn W, Nicolet Y, Macheboeuf P. Human viperin catalyzes the modification of GPP and FPP potentially affecting cholesterol synthesis. FEBS Lett 2018; 592:199-208. [PMID: 29251770 DOI: 10.1002/1873-3468.12941] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/20/2017] [Accepted: 12/10/2017] [Indexed: 12/25/2022]
Abstract
Viperin is a radical SAM enzyme that possesses antiviral properties against a broad range of enveloped viruses. Here, we describe the activity of human viperin with two molecules of the mevalonate pathway, geranyl pyrophosphate, and farnesyl pyrophosphate, involved in cholesterol biosynthesis. We postulate that the radical modification of these two molecules by viperin might lead to defects in cholesterol synthesis, thereby affecting the composition of lipid rafts and subsequent enveloped virus budding.
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Affiliation(s)
| | | | | | | | - Yvain Nicolet
- Univ. Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
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37
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Vonderstein K, Nilsson E, Hubel P, Nygård Skalman L, Upadhyay A, Pasto J, Pichlmair A, Lundmark R, Överby AK. Viperin Targets Flavivirus Virulence by Inducing Assembly of Noninfectious Capsid Particles. J Virol 2018; 92:e01751-17. [PMID: 29046456 DOI: 10.1128/JVI.01751-17] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022] Open
Abstract
Efficient antiviral immunity requires interference with virus replication at multiple layers targeting diverse steps in the viral life cycle. We describe here a novel flavivirus inhibition mechanism that results in interferon-mediated obstruction of tick-borne encephalitis virus particle assembly and involves release of malfunctioning membrane-associated capsid (C) particles. This mechanism is controlled by the activity of the interferon-induced protein viperin, a broad-spectrum antiviral interferon-stimulated gene. Through analysis of the viperin-interactome, we identified the Golgi brefeldin A-resistant guanine nucleotide exchange factor 1 (GBF1) as the cellular protein targeted by viperin. Viperin-induced antiviral activity, as well as C-particle release, was stimulated by GBF1 inhibition and knockdown and reduced by elevated levels of GBF1. Our results suggest that viperin targets flavivirus virulence by inducing the secretion of unproductive noninfectious virus particles via a GBF1-dependent mechanism. This as-yet-undescribed antiviral mechanism allows potential therapeutic intervention. IMPORTANCE The interferon response can target viral infection on almost every level; however, very little is known about the interference of flavivirus assembly. We show here that interferon, through the action of viperin, can disturb the assembly of tick-borne encephalitis virus. The viperin protein is highly induced after viral infection and exhibit broad-spectrum antiviral activity. However, the mechanism of action is still elusive and appears to vary between the different viruses, indicating that cellular targets utilized by several viruses might be involved. In this study, we show that viperin induces capsid particle release by interacting and inhibiting the function of the cellular protein Golgi brefeldin A-resistant guanine nucleotide exchange factor 1 (GBF1). GBF1 is a key protein in the cellular secretory pathway and is essential in the life cycle of many viruses, also targeted by viperin, implicating GBF1 as a novel putative drug target.
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38
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Yahya M, Rulli M, Toivonen L, Waris M, Peltola V. Detection of Host Response to Viral Respiratory Infection by Measurement of Messenger RNA for MxA, TRIM21, and Viperin in Nasal Swabs. J Infect Dis 2017; 216:1099-1103. [PMID: 28968760 PMCID: PMC7107421 DOI: 10.1093/infdis/jix458] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 08/28/2017] [Indexed: 12/15/2022] Open
Abstract
Respiratory viruses frequently cause symptomatic infections in children but are often detected also in healthy children. We investigated myxovirus resistance protein A (MxA), viperin, and tripartite-motif 21 (TRIM21) messenger RNA indexes in nasal swabs as potential biomarkers of viral respiratory infection in children. Respiratory viruses were detected by polymerase chain reaction in the same swabs. Nasal MxA and viperin indexes were increased in symptomatic virus-positive children. Nasal viperin index was found to be a robust marker of viral respiratory tract infection with a sensitivity of 80% and specificity of 94% in distinguishing children with symptomatic virus infections from asymptomatic virus-negative children.
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Affiliation(s)
- Mohamed Yahya
- Department of Paediatrics and Adolescent Medicine, University of Turku, Finland
| | - Maris Rulli
- Department of Paediatrics and Adolescent Medicine, University of Turku, Finland
| | - Laura Toivonen
- Department of Paediatrics and Adolescent Medicine, University of Turku, Finland
| | - Matti Waris
- Department of Clinical Virology, Turku University Hospital and University of Turku, Finland
| | - Ville Peltola
- Department of Paediatrics and Adolescent Medicine, University of Turku, Finland
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39
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Qi Z, Xia J, Xue X, Liu J, Liu W, Ding S. Targeting viperin improves diet-induced glucose intolerance but not adipose tissue inflammation. Oncotarget 2017; 8:101418-101436. [PMID: 29254175 PMCID: PMC5731885 DOI: 10.18632/oncotarget.20724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/02/2017] [Indexed: 12/20/2022] Open
Abstract
Viperin is an interferon-inducible antiviral protein, responsible for antiviral response to a variety of viral infections. Here, we show that silencing viperin by antisense oligonucleotides (ASO) protects against diet-induced glucose intolerance, and yet exacerbates adipose tissue inflammation. In high-fat diet-fed mice, viperin ASO improves glucose homeostasis, reduces plasma triglyceride concentrations and ameliorates diet-induced hepatic steatosis. Peripheral delivery of viperin by adeno-associated virus elevates fasting plasma glucose and insulin concentrations and reduces insulin-stimulated glucose uptake in skeletal muscle. Viperin overexpression reduces epinephrine- stimulated lipolysis in white adipose tissue, whereas viperin ASO increases expression of lipolytic genes. Targeting viperin by antisense oligonucleotides promotes reciprocal regulation of hepatic and adipose lipogenesis by reducing hepatic lipid content and increasing triacylglycerol content in adipose tissue. These findings reveal viperin as an important target to improve glucose metabolism, and suggest that suppressing antiviral potential may improve the metabolic adaptability to high-fat diet.
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Affiliation(s)
- Zhengtang Qi
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Jie Xia
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Xiangli Xue
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Jiatong Liu
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Weina Liu
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Shuzhe Ding
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
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40
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Nagesh PT, Hussain M, Galvin HD, Husain M. Histone Deacetylase 2 Is a Component of Influenza A Virus-Induced Host Antiviral Response. Front Microbiol 2017; 8:1315. [PMID: 28769891 PMCID: PMC5511851 DOI: 10.3389/fmicb.2017.01315] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 06/29/2017] [Indexed: 11/13/2022] Open
Abstract
Host cells produce variety of antiviral factors that create an antiviral state and target various stages of influenza A virus (IAV) life cycle to inhibit infection. However, IAV has evolved various strategies to antagonize those antiviral factors. Recently, we reported that a member of class I host histone deacetylases (HDACs), HDAC1 possesses an anti-IAV function. Herein, we provide evidence that HDAC2, another class I member and closely related to HDAC1 in structure and function, also possesses anti-IAV properties. In turn, IAV, like HDAC1, dysregulates HDAC2, mainly at the polypeptide level through proteasomal degradation to potentially minimize its antiviral effect. We found that IAV downregulated the HDAC2 polypeptide level in A549 cells in an H1N1 strain-independent manner by up to 47%, which was recovered to almost 100% level in the presence of proteasome-inhibitor MG132. A further knockdown in HDAC2 expression by up to 90% via RNA interference augmented the growth kinetics of IAV in A549 cells by more than four-fold after 24 h of infection. Furthermore, the knockdown of HDAC2 expression decreased the IAV-induced phosphorylation of the transcription factor, Signal Transducer and Activator of Transcription I (STAT1) and the expression of interferon-stimulated gene, viperin in infected cells by 41 and 53%, respectively. The role of HDAC2 in viperin expression was analogous to that of HDAC1, but it was not in the phosphorylation of STAT1. This indicated that, like HDAC1, HDAC2 is a component of IAV-induced host innate antiviral response and performs both redundant and non-redundant functions vis-a-vis HDAC1; however, IAV dysregulates them both in a redundant manner.
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Affiliation(s)
- Prashanth T Nagesh
- Department of Microbiology and Immunology, University of OtagoDunedin, New Zealand.,Department of Microbiology, New York University School of Medicine, New YorkNY, United States
| | - Mazhar Hussain
- Department of Microbiology and Immunology, University of OtagoDunedin, New Zealand
| | - Henry D Galvin
- Department of Microbiology and Immunology, University of OtagoDunedin, New Zealand
| | - Matloob Husain
- Department of Microbiology and Immunology, University of OtagoDunedin, New Zealand
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41
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Upadhyay AS, Stehling O, Panayiotou C, Rösser R, Lill R, Överby AK. Cellular requirements for iron-sulfur cluster insertion into the antiviral radical SAM protein viperin. J Biol Chem 2017; 292:13879-13889. [PMID: 28615450 DOI: 10.1074/jbc.m117.780122] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 06/05/2017] [Indexed: 01/05/2023] Open
Abstract
Viperin (RSAD2) is an interferon-stimulated antiviral protein that belongs to the radical S-adenosylmethionine (SAM) enzyme family. Viperin's iron-sulfur (Fe/S) cluster is critical for its antiviral activity against many different viruses. CIA1 (CIAO1), an essential component of the cytosolic iron-sulfur protein assembly (CIA) machinery, is crucial for Fe/S cluster insertion into viperin and hence for viperin's antiviral activity. In the CIA pathway, CIA1 cooperates with CIA2A, CIA2B, and MMS19 targeting factors to form various complexes that mediate the dedicated maturation of specific Fe/S recipient proteins. To date, however, the mechanisms of how viperin acquires its radical SAM Fe/S cluster to gain antiviral activity are poorly understood. Using co-immunoprecipitation and 55Fe-radiolabeling experiments, we therefore studied the roles of CIA2A, CIA2B, and MMS19 for Fe/S cluster insertion. CIA2B and MMS19 physically interacted with the C terminus of viperin and used CIA1 as the primary viperin-interacting protein. In contrast, CIA2A bound to viperin's N terminus in a CIA1-, CIA2B-, and MMS19-independent fashion. Of note, the observed interaction of both CIA2 isoforms with a single Fe/S target protein is unprecedented in the CIA pathway. 55Fe-radiolabeling experiments with human cells depleted of CIA1, CIA2A, CIA2B, or MMS19 revealed that CIA1, but none of the other CIA factors, is predominantly required for 55Fe/S cluster incorporation into viperin. Collectively, viperin maturation represents a novel CIA pathway with a minimal requirement of the CIA-targeting factors and represents a new paradigm for the insertion of the Fe/S cofactor into a radical SAM protein.
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Affiliation(s)
- Arunkumar S Upadhyay
- From the Department of Clinical Microbiology, Virology, Umeå University, 90185 Umeå, Sweden.,the Laboratory for Infection Medicine Sweden (MIMS), Umeå University, 90187 Umeå, Sweden
| | - Oliver Stehling
- the Institut für Zytobiologie und Zytopathologie, Philipps-Universität Marburg, Robert-Koch-strasse 6, 35032 Marburg, Germany, and
| | - Christakis Panayiotou
- From the Department of Clinical Microbiology, Virology, Umeå University, 90185 Umeå, Sweden.,the Laboratory for Infection Medicine Sweden (MIMS), Umeå University, 90187 Umeå, Sweden
| | - Ralf Rösser
- the Institut für Zytobiologie und Zytopathologie, Philipps-Universität Marburg, Robert-Koch-strasse 6, 35032 Marburg, Germany, and
| | - Roland Lill
- the Institut für Zytobiologie und Zytopathologie, Philipps-Universität Marburg, Robert-Koch-strasse 6, 35032 Marburg, Germany, and .,LOEWE Zentrum für Synthetische Mikrobiologie SynMikro, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Anna K Överby
- From the Department of Clinical Microbiology, Virology, Umeå University, 90185 Umeå, Sweden, .,the Laboratory for Infection Medicine Sweden (MIMS), Umeå University, 90187 Umeå, Sweden
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Bai X, Yang H, Wan L, Wang P, Wang H, Yang X, Wang Z, Dong M. Involvement of viperin in prevention of intrauterine transmission of hepatitis B virus. APMIS 2016; 125:170-175. [PMID: 27943419 DOI: 10.1111/apm.12630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 09/12/2016] [Indexed: 01/02/2023]
Abstract
The aim of this study was to explore the role of viperin in the prevention of intrauterine infection of hepatitis B virus (HBV). Placental samples were collected from seven HBV-positive pregnant women with their infants infected via intrauterine transmission (infected group), 30 HBV-positive women with non-infected infants (non-infected group), and 30 HBV-negative women (controls). The expression of viperin in placenta was analyzed with immunohistochemistry and Western blotting. The expression of viperin of placental trophoblast cell line Swan71 was determined after exposed to HBV. Viperin was localized to syncytiotrophoblast, and there was a significant difference in placental viperin levels among control, non-infected group and infected group (F = 12.824, p < 0.001). The expression of viperin was significantly higher in non-infected group than in control (p = 0.019) and in infected group (p < 0.001), and viperin expression was significantly lower in infected group than in control (p = 0.001). The exposure to HBV significantly increased the expression of viperin in Swan 71 (p < 0.001). Exposure to HBV up-regulates viperin expression in vivo and in vitro in placental trophoblast, and lack of this up-regulation is associated with intrauterine transmission of HBV.
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Affiliation(s)
- Xiaoxia Bai
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Huiyan Yang
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Liuxia Wan
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Peng Wang
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Hanzhi Wang
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Xiaofu Yang
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Zhengping Wang
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
| | - Minyue Dong
- Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China.,Key Laboratory of Women's Reproductive Health of Zhejiang Province, Zhejiang, China.,Key Laboratory of Reproductive Genetics of the Ministry of Education, Zhejiang, China
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Abstract
Radical S-adenosylmethionine (SAM) enzymes catalyze an astonishing array of complex and chemically challenging reactions across all domains of life. Of approximately 114,000 of these enzymes, 8 are known to be present in humans: MOCS1, molybdenum cofactor biosynthesis; LIAS, lipoic acid biosynthesis; CDK5RAP1, 2-methylthio-N(6)-isopentenyladenosine biosynthesis; CDKAL1, methylthio-N(6)-threonylcarbamoyladenosine biosynthesis; TYW1, wybutosine biosynthesis; ELP3, 5-methoxycarbonylmethyl uridine; and RSAD1 and viperin, both of unknown function. Aberrations in the genes encoding these proteins result in a variety of diseases. In this review, we summarize the biochemical characterization of these 8 radical S-adenosylmethionine enzymes and, in the context of human health, describe the deleterious effects that result from such genetic mutations.
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Affiliation(s)
- Bradley J Landgraf
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Erin L McCarthy
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Squire J Booker
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802.,Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802.,The Howard Hughes Medical Institute, The Pennsylvania State University, University Park, Pennsylvania 16802;
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Fletcher SP, Chin DJ, Cheng DT, Ravindran P, Bitter H, Gruenbaum L, Cote PJ, Ma H, Klumpp K, Menne S. Identification of an intrahepatic transcriptional signature associated with self-limiting infection in the woodchuck model of hepatitis B. Hepatology 2013; 57:13-22. [PMID: 22806943 PMCID: PMC3525799 DOI: 10.1002/hep.25954] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 06/30/2012] [Indexed: 12/20/2022]
Abstract
UNLABELLED The woodchuck model of hepatitis B virus (HBV) infection displays many characteristics of human infection and has particular value for characterizing the host immune responses during the development of chronic infection. Using the newly developed custom woodchuck microarray platform, we compared the intrahepatic transcriptional profiles of neonatal woodchucks with self-limiting woodchuck hepatitis virus (WHV) infection to those woodchucks progressing to persistent WHV infection. This revealed that WHV does not induce significant intrahepatic gene expression changes during the early-acute stage of infection (8 weeks), suggesting it is a stealth virus. At the mid-acute phase of infection (14 weeks), resolution was associated with induction of a prominent cytotoxic T-cell signature. Strikingly, this was accompanied by high-level expression of PD-1 and various other inhibitory T-cell receptors, which likely act to minimize liver damage by cytotoxic T cells during viral clearance. In contrast to the expression of perforin and other cytotoxic effector genes, the interferon-γ (IFN-γ) signaling response in the mid-acute phase was comparable to that in chronically infected adult animals. The absence of a strong IFN-α/β transcriptional response indicated that type I IFN is not a critical mediator of self-limiting infection. Nevertheless, a number of antiviral genes, including viperin, were differentially expressed during resolving infection, suggesting that a subset of IFN-stimulated genes (ISG) may play a role in the control of WHV replication. CONCLUSION We identified new immune pathways associated with the clearance of hepadnavirus infection revealing novel molecular targets with potential for the therapeutic treatment of chronic hepatitis B.
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Affiliation(s)
- Simon P. Fletcher
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Daniel J. Chin
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Donavan T. Cheng
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | | | - Hans Bitter
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Lore Gruenbaum
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Paul J. Cote
- Georgetown University Medical Center, Department of Microbiology & Immunology, Medical-Dental Building, 3900 Reservoir Road, Washington, DC 20057, USA
| | - Han Ma
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Klaus Klumpp
- Hoffmann-La Roche, Inc., 340 Kingsland Street, Nutley, NJ 07006, USA
| | - Stephan Menne
- Georgetown University Medical Center, Department of Microbiology & Immunology, Medical-Dental Building, 3900 Reservoir Road, Washington, DC 20057, USA
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Helbig KJ, Eyre NS, Yip E, Narayana S, Li K, Fiches G, McCartney EM, Jangra RK, Lemon SM, Beard MR. The antiviral protein viperin inhibits hepatitis C virus replication via interaction with nonstructural protein 5A. Hepatology 2011; 54:1506-17. [PMID: 22045669 PMCID: PMC3207276 DOI: 10.1002/hep.24542] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
UNLABELLED The interferon-stimulated gene, viperin, has been shown to have antiviral activity against hepatitis C virus (HCV) in the context of the HCV replicon, although the molecular mechanisms responsible are not well understood. Here, we demonstrate that viperin plays an integral part in the ability of interferon to limit the replication of cell-culture-derived HCV (JFH-1) that accurately reflects the complete viral life cycle. Using confocal microscopy and fluorescence resonance energy transfer (FRET) analysis, we demonstrate that viperin localizes and interacts with HCV nonstructural protein 5A (NS5A) at the lipid-droplet (LD) interface. In addition, viperin also associates with NS5A and the proviral cellular factor, human vesicle-associated membrane protein-associated protein subtype A (VAP-A), at the HCV replication complex. The ability of viperin to limit HCV replication was dependent on residues within the C-terminus, as well as an N-terminal amphipathic helix. Removal of the amphipathic helix-redirected viperin from the cytosolic face of the endoplasmic reticulum and the LD to a homogenous cytoplasmic distribution, coinciding with a loss of antiviral effect. C-terminal viperin mutants still localized to the LD interface and replication complexes, but did not interact with NS5A proteins, as determined by FRET analysis. CONCLUSION In conclusion, we propose that viperin interacts with NS5A and the host factor, VAP-A, to limit HCV replication at the replication complex. This highlights the complexity of the host control of viral replication by interferon-stimulated gene expression.
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Affiliation(s)
- Karla J. Helbig
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Nicholas S. Eyre
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Evelyn Yip
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Sumudu Narayana
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Kui Li
- Department of Molecular Sciences, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Guillaume Fiches
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Erin M. McCartney
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
| | - Rohit K. Jangra
- Center for Hepatitis Research, Institute for Human Infections and Immunity, University of Texas Medical Branch at Galveston, Galveston, TX, 77555, USA,Department of Microbiology & Immunology, Mt. Sinai School of Medicine, New York, NY 10029, USA
| | - Stanley M. Lemon
- Center for Hepatitis Research, Institute for Human Infections and Immunity, University of Texas Medical Branch at Galveston, Galveston, TX, 77555, USA,Inflammatory Diseases Institute, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295 USA
| | - Michael R. Beard
- Centre for Cancer Biology, Hanson Centre, Adelaide, South Australia and School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5000, Australia
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