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Sarkar R, Chhabra S, Tanwar M, Agarwal N, Kalia M. Japanese encephalitis virus hijacks ER-associated degradation regulators for its replication. J Gen Virol 2024; 105. [PMID: 38787366 DOI: 10.1099/jgv.0.001995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024] Open
Abstract
Flaviviruses target their replication on membranous structures derived from the ER, where both viral and host proteins play crucial structural and functional roles. Here, we have characterized the involvement of the ER-associated degradation (ERAD) pathway core E3 ligase complex (SEL1L-HRD1) regulator proteins in the replication of Japanese encephalitis virus (JEV). Through high-resolution immunofluorescence imaging of JEV-infected HeLa cells, we observe that the virus replication complexes marked by NS1 strongly colocalize with the ERAD adapter SEL1L, lectin OS9, ER-membrane shuttle factor HERPUD1, E3 ubiquitin ligase HRD1 and rhomboid superfamily member DERLIN1. NS5 positive structures also show strong overlap with SEL1L. While these effectors show significant transcriptional upregulation, their protein levels remain largely stable in infected cells. siRNA mediated depletion of OS9, SEL1L, HERPUD1 and HRD1 significantly inhibit viral RNA replication and titres, with SEL1L depletion showing the maximum attenuation of replication. By performing protein translation arrest experiments, we show that SEL1L, and OS9 are stabilised upon JEV infection. Overall results from this study suggest that these ERAD effector proteins are crucial host-factors for JEV replication.
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Affiliation(s)
- Riya Sarkar
- Virology Research Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, 121001, India
- Centre for Tuberculosis Research, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, 121001, India
- Present address: Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Simran Chhabra
- Virology Research Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, 121001, India
| | - Mukesh Tanwar
- Virology Research Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, 121001, India
| | - Nisheeth Agarwal
- Centre for Tuberculosis Research, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, 121001, India
| | - Manjula Kalia
- Virology Research Group, Regional Centre for Biotechnology, NCR Biotech Science Cluster, Faridabad, 121001, India
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Pahmeier F, Lavacca TM, Goellner S, Neufeldt CJ, Prasad V, Cerikan B, Rajasekharan S, Mizzon G, Haselmann U, Funaya C, Scaturro P, Cortese M, Bartenschlager R. Identification of host dependency factors involved in SARS-CoV-2 replication organelle formation through proteomics and ultrastructural analysis. J Virol 2023; 97:e0087823. [PMID: 37905840 PMCID: PMC10688318 DOI: 10.1128/jvi.00878-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 09/18/2023] [Indexed: 11/02/2023] Open
Abstract
IMPORTANCE Remodeling of the cellular endomembrane system by viruses allows for efficient and coordinated replication of the viral genome in distinct subcellular compartments termed replication organelles. As a critical step in the viral life cycle, replication organelle formation is an attractive target for therapeutic intervention, but factors central to this process are only partially understood. In this study, we corroborate that two viral proteins, nsp3 and nsp4, are the major drivers of membrane remodeling in SARS-CoV-2 infection. We further report a number of host cell factors interacting with these viral proteins and supporting the viral replication cycle, some of them by contributing to the formation of the SARS-CoV-2 replication organelle.
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Affiliation(s)
- Felix Pahmeier
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Teresa-Maria Lavacca
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Sarah Goellner
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Christopher J. Neufeldt
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Vibhu Prasad
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Berati Cerikan
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | | | - Giulia Mizzon
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
- German Center for Infection Research, Heidelberg partner site, Heidelberg, Germany
| | - Uta Haselmann
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Charlotta Funaya
- Electron Microscopy Core Facility, Heidelberg University, Heidelberg, Germany
| | - Pietro Scaturro
- Systems Arbovirology, Leibniz Institute of Virology, Hamburg, Germany
| | - Mirko Cortese
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Ralf Bartenschlager
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Medical Faculty Heidelberg, Center for Integrative Infectious Disease Research, Heidelberg, Germany
- German Center for Infection Research, Heidelberg partner site, Heidelberg, Germany
- Division “Virus-Associated Carcinogenesis”, German Cancer Research Center (DKFZ), Heidelberg, Germany
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Sow AA, Pahmeier F, Ayotte Y, Anton A, Mazeaud C, Charpentier T, Angelo L, Woo S, Cerikan B, Falzarano D, Abrahamyan L, Lamarre A, Labonté P, Cortese M, Bartenschlager R, LaPlante SR, Chatel-Chaix L. N-Phenylpyridine-3-Carboxamide and 6-Acetyl-1H-Indazole Inhibit the RNA Replication Step of the Dengue Virus Life Cycle. Antimicrob Agents Chemother 2023; 67:e0133122. [PMID: 36700643 PMCID: PMC9933715 DOI: 10.1128/aac.01331-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/26/2022] [Indexed: 01/27/2023] Open
Abstract
Dengue virus (DENV) is a Flavivirus that causes the most prevalent arthropod-borne viral disease. Clinical manifestation of DENV infection ranges from asymptomatic to severe symptoms that can lead to death. Unfortunately, no antiviral treatments against DENV are currently available. In order to identify novel DENV inhibitors, we screened a library of 1,604 chemically diversified fragment-based compounds using DENV reporter viruses that allowed quantification of viral replication in infected cells. Following a validation screening, the two best inhibitor candidates were N-phenylpyridine-3-carboxamide (NPP3C) and 6-acetyl-1H-indazole (6A1HI). The half maximal effective concentration of NPP3C and 6A1H1 against DENV were 7.1 μM and 6.5 μM, respectively. 6A1H1 decreased infectious DENV particle production up to 1,000-fold without any cytotoxicity at the used concentrations. While 6A1HI was DENV-specific, NPP3C also inhibited the replication of other flaviviruses such as West Nile virus and Zika virus. Structure-activity relationship (SAR) studies with 151 analogues revealed key structural elements of NPP3C and 6A1HI required for their antiviral activity. Time-of-drug-addition experiments identified a postentry step as a target of these compounds. Consistently, using a DENV subgenomic replicon, we demonstrated that these compounds specifically impede the viral RNA replication step and exhibit a high genetic barrier-to-resistance. In contrast, viral RNA translation and the de novo biogenesis of DENV replication organelles were not affected. Overall, our data unveil NPP3C and 6A1H1 as novel DENV inhibitors. The information revealed by our SAR studies will help chemically optimize NPP3C and 6A1H1 in order to improve their anti-flaviviral potency and to challenge them in in vivo models.
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Affiliation(s)
- Aïssatou Aïcha Sow
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Felix Pahmeier
- Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research (CIID), Heidelberg University, Heidelberg, Germany
| | - Yann Ayotte
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Anaïs Anton
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Clément Mazeaud
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Tania Charpentier
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Léna Angelo
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Simon Woo
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Berati Cerikan
- Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research (CIID), Heidelberg University, Heidelberg, Germany
| | - Darryl Falzarano
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Levon Abrahamyan
- Faculty of Veterinary Medicine, University of Montreal, Saint-Hyacinthe, Quebec, Canada
| | - Alain Lamarre
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Patrick Labonté
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Mirko Cortese
- Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research (CIID), Heidelberg University, Heidelberg, Germany
- Telethon Institute of Genetics and Medicine, Naples, Italy
| | - Ralf Bartenschlager
- Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research (CIID), Heidelberg University, Heidelberg, Germany
- German Center for Infection Research (DZIF), Heidelberg partner site, Heidelberg, Germany
| | - Steven R. LaPlante
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
| | - Laurent Chatel-Chaix
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique, Laval, Quebec, Canada
- Center of Excellence in Orphan Diseases Research-Foundation Courtois, Quebec, Canada
- Réseau Intersectoriel de Recherche en Santé de l’Université du Québec, Quebec, Canada
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Rodrigo I, Ballesta C, Nunes EB, Pérez P, García-Arriaza J, Arias A. Eeyarestatin I, an inhibitor of the valosin-containing protein, exhibits potent virucidal activity against the flaviviruses. Antiviral Res 2022; 207:105416. [PMID: 36113629 DOI: 10.1016/j.antiviral.2022.105416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 09/05/2022] [Accepted: 09/08/2022] [Indexed: 11/26/2022]
Abstract
Cellular responses to stress generally lead to the activation of the endoplasmic reticulum-associated protein degradation (ERAD) pathway. Several lines of study support that ERAD may be playing a proviral role during flaviviral infection. A key host factor in ERAD is the valosin-containing protein (VCP), an ATPase which ushers ubiquitin-tagged proteins to degradation by the proteasome. VCP exhibits different proviral activities, such as engaging in the biogenesis of viral replication organelles and facilitating flavivirus genome uncoating after the viral particle entry. To investigate the possible antiviral value of drugs targeting VCP, we tested two inhibitors: eeyarestatin I (EEY) and xanthohumol (XAN). Both compounds were highly effective in suppressing Zika virus (ZIKV) and Usutu virus (USUV) replication during infection in cell culture. Further analysis revealed an unexpected virucidal activity for EEY, but not for XAN. Preincubation of ZIKV or USUV with EEY before inoculation to cells resulted in significant decreases in infectivity in a dose- and time-dependent manner. Viral genomes in samples previously treated with EEY were more sensitive to propidium monoazide, an intercalating agent, with 10- to 100-fold decreases observed in viral RNA levels, supporting that EEY affects viral particle integrity. Altogether, these results support that EEY is a strong virucide against two unrelated flaviviruses, encouraging further studies to investigate its potential use as a broad-acting drug or the development of improved derivatives in the treatment of flaviviral infection.
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Affiliation(s)
- Imanol Rodrigo
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomedicas (CRIB), Universidad de Castilla-La Mancha (UCLM), Albacete, Spain; Unidad de Biomedicina, UCLM-CSIC, Albacete, Spain
| | - Carlos Ballesta
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomedicas (CRIB), Universidad de Castilla-La Mancha (UCLM), Albacete, Spain; Unidad de Biomedicina, UCLM-CSIC, Albacete, Spain
| | - Eliane Blanco Nunes
- Departamento de Vigilância em Zoonoses, Secretaria Municipal de Saúde Goiânia, Rodovia Go-020 km 08, Val Das Pombas, 75250-000, Goiânia, Goias State, Brazil
| | - Patricia Pérez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnologla (CNB), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain; Centro de Investigacion Biomedica en Red de Enfermedades Infecciosas (CIBERINFEC), Madrid, Spain
| | - Juan García-Arriaza
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnologla (CNB), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain; Centro de Investigacion Biomedica en Red de Enfermedades Infecciosas (CIBERINFEC), Madrid, Spain
| | - Armando Arias
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomedicas (CRIB), Universidad de Castilla-La Mancha (UCLM), Albacete, Spain; Unidad de Biomedicina, UCLM-CSIC, Albacete, Spain; Escuela Técnica Superior de Ingenieros Agrónomos, UCLM, Albacete, Spain.
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5
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Feng Z, Kovalev N, Nagy PD. Multifunctional role of the co-opted Cdc48 AAA+ ATPase in tombusvirus replication. Virology 2022; 576:1-17. [PMID: 36126429 DOI: 10.1016/j.virol.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 08/07/2022] [Indexed: 10/31/2022]
Abstract
Replication of positive-strand RNA viruses depends on usurped cellular membranes and co-opted host proteins. Based on pharmacological inhibition and genetic and biochemical approaches, the authors identified critical roles of the cellular Cdc48 unfoldase/segregase protein in facilitating the replication of tomato bushy stunt virus (TBSV). We show that TBSV infection induces the expression of Cdc48 in Nicotiana benthamiana plants. Cdc48 binds to the TBSV replication proteins through its N-terminal region. In vitro TBSV replicase reconstitution experiments demonstrated that Cdc48 is needed for efficient replicase assembly and activity. Surprisingly, the in vitro replication experiments also showed that excess amount of Cdc48 facilitates the disassembly of the membrane-bound viral replicase-RNA template complex. Cdc48 is also needed for the recruitment of additional host proteins. Because several human viruses, including flaviviruses, utilize Cdc48, also called VCP/p97, for replication, we suggest that Cdc48 might be a common panviral host factor for plant and animal RNA viruses.
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Affiliation(s)
- Zhike Feng
- Department of Plant Pathology, University of Kentucky, Lexington, USA
| | - Nikolay Kovalev
- Department of Plant Pathology, University of Kentucky, Lexington, USA
| | - Peter D Nagy
- Department of Plant Pathology, University of Kentucky, Lexington, USA.
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6
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The Biogenesis of Dengue Virus Replication Organelles Requires the ATPase Activity of Valosin-Containing Protein. Viruses 2021; 13:v13102092. [PMID: 34696522 PMCID: PMC8540793 DOI: 10.3390/v13102092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 10/13/2021] [Indexed: 12/03/2022] Open
Abstract
The dengue virus (DENV) causes the most prevalent arthropod-borne viral disease worldwide. While its incidence is increasing in many countries, there is no approved antiviral therapy currently available. In infected cells, the DENV induces extensive morphological alterations of the endoplasmic reticulum (ER) to generate viral replication organelles (vRO), which include convoluted membranes (CM) and vesicle packets (VP) hosting viral RNA replication. The viral non-structural protein NS4B localizes to vROs and is absolutely required for viral replication through poorly defined mechanisms, which might involve cellular protein partners. Previous interactomic studies identified the ATPase valosin-containing protein (VCP) as a DENV NS4B-interacting host factor in infected cells. Using both pharmacological and dominant-negative inhibition approaches, we show, in this study, that VCP ATPase activity is required for efficient DENV replication. VCP associates with NS4B when expressed in the absence of other viral proteins while in infected cells, both proteins colocalize within large DENV-induced cytoplasmic structures previously demonstrated to be CMs. Consistently, VCP inhibition dramatically reduces the abundance of DENV CMs in infected cells. Most importantly, using a recently reported replication-independent plasmid-based vRO induction system, we show that de novo VP biogenesis is dependent on VCP ATPase activity. Overall, our data demonstrate that VCP ATPase activity is required for vRO morphogenesis and/or stability. Considering that VCP was shown to be required for the replication of other flaviviruses, our results argue that VCP is a pan-flaviviral host dependency factor. Given that new generation VCP-targeting drugs are currently evaluated in clinical trials for cancer treatment, VCP may constitute an attractive broad-spectrum antiviral target in drug repurposing approaches.
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7
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Das P, Dudley JP. How Viruses Use the VCP/p97 ATPase Molecular Machine. Viruses 2021; 13:1881. [PMID: 34578461 PMCID: PMC8473244 DOI: 10.3390/v13091881] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 12/22/2022] Open
Abstract
Viruses are obligate intracellular parasites that are dependent on host factors for their replication. One such host protein, p97 or the valosin-containing protein (VCP), is a highly conserved AAA ATPase that facilitates replication of diverse RNA- and DNA-containing viruses. The wide range of cellular functions attributed to this ATPase is consistent with its participation in multiple steps of the virus life cycle from entry and uncoating to viral egress. Studies of VCP/p97 interactions with viruses will provide important information about host processes and cell biology, but also viral strategies that take advantage of these host functions. The critical role of p97 in viral replication might be exploited as a target for development of pan-antiviral drugs that exceed the capability of virus-specific vaccines or therapeutics.
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Affiliation(s)
- Poulami Das
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX 78712, USA;
| | - Jaquelin P. Dudley
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX 78712, USA;
- LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX 78712, USA
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8
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Amaryllidaceae Alkaloid Cherylline Inhibits the Replication of Dengue and Zika Viruses. Antimicrob Agents Chemother 2021; 65:e0039821. [PMID: 34152811 PMCID: PMC8370201 DOI: 10.1128/aac.00398-21] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dengue fever, caused by dengue virus (DENV), is the most prevalent arthropod-borne viral disease and is endemic in many tropical and subtropical parts of the world, with an increasing incidence in temperate regions. The closely related flavivirus Zika virus (ZIKV) can be transmitted vertically in utero and causes congenital Zika syndrome and other birth defects. In adults, ZIKV is associated with Guillain-Barré syndrome. There are no approved antiviral therapies against either virus. Effective antiviral compounds are urgently needed. Amaryllidaceae alkaloids (AAs) are a specific class of nitrogen-containing compounds produced by plants of the Amaryllidaceae family with numerous biological activities. Recently, the AA lycorine was shown to present strong antiflaviviral properties. Previously, we demonstrated that Crinum jagus contained lycorine and several alkaloids of the cherylline, crinine, and galanthamine types with unknown antiviral potential. In this study, we explored their biological activities. We show that C. jagus crude alkaloid extract inhibited DENV infection. Among the purified AAs, cherylline efficiently inhibited both DENV (50% effective concentration [EC50], 8.8 μM) and ZIKV replication (EC50, 20.3 μM) but had no effect on HIV-1 infection. Time-of-drug-addition and -removal experiments identified a postentry step as the one targeted by cherylline. Consistently, using subgenomic replicons and replication-defective genomes, we demonstrate that cherylline specifically hinders the viral RNA synthesis step but not viral translation. In conclusion, AAs are an underestimated source of antiflavivirus compounds, including the effective inhibitor cherylline, which could be optimized for new therapeutic approaches.
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Alpuche-Lazcano SP, Saliba J, Costa VV, Campolina-Silva GH, Marim FM, Ribeiro LS, Blank V, Mouland AJ, Teixeira MM, Gatignol A. Profound downregulation of neural transcription factor Npas4 and Nr4a family in fetal mice neurons infected with Zika virus. PLoS Negl Trop Dis 2021; 15:e0009425. [PMID: 34048439 PMCID: PMC8191876 DOI: 10.1371/journal.pntd.0009425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 06/10/2021] [Accepted: 04/30/2021] [Indexed: 01/01/2023] Open
Abstract
Zika virus (ZIKV) infection of neurons leads to neurological complications and congenital malformations of the brain of neonates. To date, ZIKV mechanism of infection and pathogenesis is not entirely understood and different studies on gene regulation of ZIKV-infected cells have identified a dysregulation of inflammatory and stem cell maintenance pathways. MicroRNAs (miRNAs) are post-transcriptional regulators of cellular genes and they contribute to cell development in normal function and disease. Previous reports with integrative analyses of messenger RNAs (mRNAs) and miRNAs during ZIKV infection have not identified neurological pathway defects. We hypothesized that dysregulation of pathways involved in neurological functions will be identified by RNA profiling of ZIKV-infected fetal neurons. We therefore used microarrays to analyze gene expression levels following ZIKV infection of fetal murine neurons. We observed that the expression levels of transcription factors such as neural PAS domain protein 4 (Npas4) and of three members of the orphan nuclear receptor 4 (Nr4a) were severely decreased after viral infection. We confirmed that their downregulation was at both the mRNA level and at the protein level. The dysregulation of these transcription factors has been previously linked to aberrant neural functions and development. We next examined the miRNA expression profile in infected primary murine neurons by microarray and found that various miRNAs were dysregulated upon ZIKV infection. An integrative analysis of the differentially expressed miRNAs and mRNAs indicated that miR-7013-5p targets Nr4a3 gene. Using miRmimics, we corroborated that miR-7013-5p downregulates Nr4a3 mRNA and protein levels. Our data identify a profound dysregulation of neural transcription factors with an overexpression of miR-7013-5p that results in decreased Nr4a3 expression, likely a main contributor to ZIKV-induced neuronal dysfunction. Zika virus (ZIKV) is an emerging virus transmitted horizontally between humans through mosquito bites, and sexual intercourse generally inducing a mild disease. ZIKV is also transmitted vertically from mother-to-child producing congenital ZIKV syndrome (CZVS) in neonates. CZVS leads to severe microcephaly associated with neurological, ocular, musculoskeletal, genitourinary disorders and other disabilities. Although numerous studies have been performed on ZIKV infection of brain cells, we are still far from understanding how ZIKV infection leads to dysregulation of host genes, virus-induced cytopathicity and consequent pathology. Micro (mi)RNAs are small noncoding RNAs encoded and processed by the host cell. They regulate gene expression at the post-transcriptional level in a process called RNA interference (RNAi). Here, we evaluated the relationship between ZIKV infection and the level of mRNAs and miRNAs expressed in the cell. ZIKV infection of mouse embryo neurons downregulated several neural immediate-early genes (IEG). Moreover, we revealed that ZIKV infection led to aberrant regulation of several miRNAs, and identified one whose cognate target was a neural IEG. Our work identifies novel genes and miRNAs that are modulated upon ZIKV infection of fetal murine neurons, therefore linking neuronal dysfunction to transcription and the RNA interference pathway.
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Affiliation(s)
- Sergio P. Alpuche-Lazcano
- Virus-Cell Interactions Laboratory, Lady Davis Institute for Medical Research, Montréal, Canada
- RNA Trafficking Laboratory, Lady Davis Institute for Medical Research, Montréal, Canada
- Department of Medicine, Division of Experimental Medicine, McGill University, Montréal, Canada
| | - James Saliba
- Department of Medicine, Division of Experimental Medicine, McGill University, Montréal, Canada
- Lady Davis Institute for Medical Research, Montréal, Canada
| | - Vivian V. Costa
- Departamento de Bioquimica e Imunologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Departamento de Morfologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Gabriel H. Campolina-Silva
- Departamento de Bioquimica e Imunologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernanda M. Marim
- Departamento de Bioquimica e Imunologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lucas S. Ribeiro
- Departamento de Bioquimica e Imunologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Volker Blank
- Lady Davis Institute for Medical Research, Montréal, Canada
- Department of Medicine, Montréal, Canada
- Department of Physiology, McGill University, Montréal, Canada
| | - Andrew J. Mouland
- RNA Trafficking Laboratory, Lady Davis Institute for Medical Research, Montréal, Canada
- Department of Medicine, Montréal, Canada
- Department of Microbiology and Immunology, McGill University, Montréal, Canada
| | - Mauro M. Teixeira
- Departamento de Bioquimica e Imunologia do Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Anne Gatignol
- Virus-Cell Interactions Laboratory, Lady Davis Institute for Medical Research, Montréal, Canada
- Department of Medicine, Montréal, Canada
- Department of Microbiology and Immunology, McGill University, Montréal, Canada
- * E-mail:
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10
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Analysis of Zika virus capsid-Aedes aegypti mosquito interactome reveals pro-viral host factors critical for establishing infection. Nat Commun 2021; 12:2766. [PMID: 33986255 PMCID: PMC8119459 DOI: 10.1038/s41467-021-22966-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 04/06/2021] [Indexed: 02/06/2023] Open
Abstract
The escalating global prevalence of arboviral diseases emphasizes the need to improve our understanding of their biology. Research in this area has been hindered by the lack of molecular tools for studying virus-mosquito interactions. Here, we develop an Aedes aegypti cell line which stably expresses Zika virus (ZIKV) capsid proteins in order to study virus-vector protein-protein interactions through quantitative label-free proteomics. We identify 157 interactors and show that eight have potentially pro-viral activity during ZIKV infection in mosquito cells. Notably, silencing of transitional endoplasmic reticulum protein TER94 prevents ZIKV capsid degradation and significantly reduces viral replication. Similar results are observed if the TER94 ortholog (VCP) functioning is blocked with inhibitors in human cells. In addition, we show that an E3 ubiquitin-protein ligase, UBR5, mediates the interaction between TER94 and ZIKV capsid. Our study demonstrates a pro-viral function for TER94/VCP during ZIKV infection that is conserved between human and mosquito cells.
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