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Chen F, Shen H, Liu G, Zhang P, Zhang L, Lin S, Gao H, Peng H, Qi YF, Chen Y, Jiang Y, Huang J, Shen X, Luo YS, Zhang K. Verapamil inhibits respiratory syncytial virus infection by regulating Ca 2+ influx. Life Sci 2024; 352:122877. [PMID: 38942358 DOI: 10.1016/j.lfs.2024.122877] [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] [Received: 01/23/2024] [Revised: 06/24/2024] [Accepted: 06/25/2024] [Indexed: 06/30/2024]
Abstract
AIMS The study evaluated the antiviral effect of Verapamil against respiratory syncytial virus (RSV) and investigated its underlying mechanism. MATERIALS AND METHODS RSV-infected BALB/c mice were treated with Verapamil. Body weight, survival rates, viral load, lung damage, inflammatory factors, and the expression of RSV fusion (F) protein were analyzed. In cellular studies, intracellular Ca2+ and viral titers were measured in the presence of Verapamil, Calcium Chloride, and EGTA. A time-of-addition assay assessed the antiviral effect of Verapamil. KEY FINDINGS Mice infected with RSV and treated with Verapamil exhibited a significant decrease in weight loss, an increase in survival rates, and reductions in viral titers, RSV F protein expression, inflammatory responses, and lung tissue injury. Verapamil reduced intracellular calcium levels, which correlated with reduced viral titers. The addition of calcium chloride reversed the anti-viral effects mediated by Verapamil, while EGTA potentiated them. The antiviral activity of Verapamil was observed during the early phase of RSV infection, likely by blocking Ca2+ channels and inhibiting virus replication. SIGNIFICANCE Verapamil effectively inhibits RSV infection by blocking calcium channels and reducing intracellular calcium levels, thereby impeding viral replication. Thus, Verapamil shows promise as a treatment for RSV.
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Affiliation(s)
- Fang Chen
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Huyan Shen
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Gang Liu
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Pingping Zhang
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Lin Zhang
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Siyu Lin
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China
| | - Han Gao
- Emergency ICU, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Hong Peng
- Emergency ICU, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Yan-Fei Qi
- Department of Pharmacology, College of Osteopathic Medicine, Duquesne University, Pittsburgh, PA 15219, USA
| | - Yan Chen
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 561113, China
| | - Yinhui Jiang
- Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, Guiyang 550004, China
| | - Jiandong Huang
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Xiangchun Shen
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 561113, China
| | - Yu-Si Luo
- Emergency ICU, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China; Department of Emergency, Liupanshui Hospital of The Affiliated Hospital of Guizhou Medical University, Liupanshui 553000, China.
| | - Ke Zhang
- Key Laboratory of Microbio and Infectious Disease Prevention & Control in Guizhou Province / Institute of Virology / The Key and Characteristic Laboratory of Modern Pathogenicity Biology, Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang 561113, China; The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 561113, China.
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Lefteri DA, Rainey SM, Murdochy SM, Sinkins SP. Bunyamwera Virus Infection of Wolbachia-Carrying Aedes aegypti Mosquitoes Reduces Wolbachia Density. Viruses 2024; 16:1336. [PMID: 39205310 PMCID: PMC11360823 DOI: 10.3390/v16081336] [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] [Received: 06/27/2024] [Revised: 08/09/2024] [Accepted: 08/19/2024] [Indexed: 09/04/2024] Open
Abstract
Wolbachia symbionts introduced into Aedes mosquitoes provide a highly effective dengue virus transmission control strategy, increasingly utilised in many countries in an attempt to reduce disease burden. Whilst highly effective against dengue and other positive-sense RNA viruses, it remains unclear how effective Wolbachia is against negative-sense RNA viruses. Therefore, the effect of Wolbachia on Bunyamwera virus (BUNV) infection in Aedes aegypti was investigated using wMel and wAlbB, two strains currently used in Wolbachia releases for dengue control, as well as wAu, a strain that typically persists at a high density and is an extremely efficient blocker of positive-sense viruses. Wolbachia was found to reduce BUNV infection in vitro but not in vivo. Instead, BUNV caused significant impacts on density of all three Wolbachia strains following infection of Ae. aegypti mosquitoes. The ability of Wolbachia to successfully persist within the mosquito and block virus transmission is partially dependent on its intracellular density. However, reduction in Wolbachia density was not observed in offspring of infected mothers. This could be due in part to a lack of transovarial transmission of BUNV observed. The results highlight the importance of understanding the complex interactions between multiple arboviruses, mosquitoes and Wolbachia in natural environments, the impact this can have on maintaining protection against diseases, and the necessity for monitoring Wolbachia prevalence at release sites.
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Affiliation(s)
| | | | | | - Steven P. Sinkins
- MRC-University of Glasgow-Centre for Virus Research, Garscube Campus, University of Glasgow, Glasgow G61 1QH, UK; (D.A.L.) (S.M.M.)
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Gu Y, Lozach PY. Illuminating bunyavirus entry into host cells with fluorescence. Mol Microbiol 2024; 121:671-678. [PMID: 37700704 DOI: 10.1111/mmi.15165] [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: 07/18/2023] [Revised: 09/02/2023] [Accepted: 09/04/2023] [Indexed: 09/14/2023]
Abstract
Bunyavirales constitute the largest order of enveloped RNA viruses, many members of which cause severe diseases in humans and domestic animals. In recent decades, innovative fluorescence-based methods have paved the way to visualize and track single fluorescent bunyaviral particles in fixed and live cells. This technological breakthrough has enabled imaging of the early stages of infection and the quantification of every step in the bunyavirus cell entry process. Here, we describe the latest procedures for rendering bunyaviral particles fluorescent and discuss the advantages and disadvantages of each approach in light of the most recent advances in fluorescence detection and monitoring of bunyavirus entry. In this mini-review, we also illustrate how fluorescent viral particles are a powerful tool for deciphering the cellular entry process of bunyaviruses, the vast majority of which have not yet been analyzed.
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Affiliation(s)
- Yu Gu
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, Lyon, France
| | - Pierre-Yves Lozach
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, Lyon, France
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4
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Hover S, Charlton FW, Hellert J, Swanson JJ, Mankouri J, Barr JN, Fontana J. Organisation of the orthobunyavirus tripodal spike and the structural changes induced by low pH and K + during entry. Nat Commun 2023; 14:5885. [PMID: 37735161 PMCID: PMC10514341 DOI: 10.1038/s41467-023-41205-w] [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: 09/16/2022] [Accepted: 08/26/2023] [Indexed: 09/23/2023] Open
Abstract
Following endocytosis, enveloped viruses employ the changing environment of maturing endosomes as cues to promote endosomal escape, a process often mediated by viral glycoproteins. We previously showed that both high [K+] and low pH promote entry of Bunyamwera virus (BUNV), the prototypical bunyavirus. Here, we use sub-tomogram averaging and AlphaFold, to generate a pseudo-atomic model of the whole BUNV glycoprotein envelope. We unambiguously locate the Gc fusion domain and its chaperone Gn within the floor domain of the spike. Furthermore, viral incubation at low pH and high [K+], reminiscent of endocytic conditions, results in a dramatic rearrangement of the BUNV envelope. Structural and biochemical assays indicate that pH 6.3/K+ in the absence of a target membrane elicits a fusion-capable triggered intermediate state of BUNV GPs; but the same conditions induce fusion when target membranes are present. Taken together, we provide mechanistic understanding of the requirements for bunyavirus entry.
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Affiliation(s)
- Samantha Hover
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom
| | - Frank W Charlton
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom
| | - Jan Hellert
- Centre for Structural Systems Biology, Leibniz-Institut für Virologie (LIV), Notkestraße 85, 22607, Hamburg, Germany
| | - Jessica J Swanson
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom
| | - Jamel Mankouri
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom.
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom.
| | - John N Barr
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom.
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom.
| | - Juan Fontana
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, Leeds, United Kingdom.
- Astbury Centre for Structural and Molecular Biology, University of Leeds, LS2 9JT, Leeds, United Kingdom.
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5
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Nair N, Osterhaus ADME, Rimmelzwaan GF, Prajeeth CK. Rift Valley Fever Virus-Infection, Pathogenesis and Host Immune Responses. Pathogens 2023; 12:1174. [PMID: 37764982 PMCID: PMC10535968 DOI: 10.3390/pathogens12091174] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/09/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Rift Valley Fever Virus is a mosquito-borne phlebovirus causing febrile or haemorrhagic illness in ruminants and humans. The virus can prevent the induction of the antiviral interferon response through its NSs proteins. Mutations in the NSs gene may allow the induction of innate proinflammatory immune responses and lead to attenuation of the virus. Upon infection, virus-specific antibodies and T cells are induced that may afford protection against subsequent infections. Thus, all arms of the adaptive immune system contribute to prevention of disease progression. These findings will aid the design of vaccines using the currently available platforms. Vaccine candidates have shown promise in safety and efficacy trials in susceptible animal species and these may contribute to the control of RVFV infections and prevention of disease progression in humans and ruminants.
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Russell T, Gangotia D, Barry G. Assessing the potential of repurposing ion channel inhibitors to treat emerging viral diseases and the role of this host factor in virus replication. Biomed Pharmacother 2022; 156:113850. [DOI: 10.1016/j.biopha.2022.113850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/25/2022] [Accepted: 10/06/2022] [Indexed: 12/03/2022] Open
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Mastrodomenico V, LoMascolo NJ, Cruz-Pulido YE, Cunha CR, Mounce BC. Polyamine-Linked Cholesterol Incorporation in Rift Valley Fever Virus Particles Promotes Infectivity. ACS Infect Dis 2022; 8:1439-1448. [PMID: 35786847 PMCID: PMC9549488 DOI: 10.1021/acsinfecdis.2c00071] [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] [Indexed: 11/29/2022]
Abstract
Viruses rely on an array of cellular metabolites to replicate and form progeny virions. One set of these molecules, polyamines, are small aliphatic molecules, which are abundant in most cells, that support virus infection; however, the precise roles of polyamines in virus infection remain incompletely understood. Recent work demonstrated that polyamine metabolism supports cellular cholesterol synthesis through translation of the key transcription factor SREBP2. Here, we show that the bunyavirus Rift Valley fever virus (RVFV) relies on both cholesterol and polyamines for virus infection. Depletion of cellular cholesterol or interruption of cholesterol trafficking negatively impacts RVFV infection. Cholesterol is incorporated into RVFV virions and mediates their infectivity in a polyamine-dependent manner; we find that the virus derived from polyamine-depleted cells lacks cholesterol within the virion membrane. Conversely, we find that virion-associated cholesterol is linked to the incorporation of spermidine within the virion. Our prior work demonstrated that polyamines facilitate pH-mediated fusion and genome release, which may be a consequence of cholesterol depletion within virions. Thus, our work highlights the metabolic connection between polyamines and cholesterol synthesis to impact bunyavirus infection. These data demonstrate the connectedness between cellular metabolic pathways and reveal potential avenues of therapeutic intervention.
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Affiliation(s)
- Vincent Mastrodomenico
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
| | - Natalie J LoMascolo
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
| | - Yazmin E Cruz-Pulido
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
- Infectious Diseases and Immunology Research Institute, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
| | - Christina R Cunha
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
| | - Bryan C Mounce
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
- Infectious Diseases and Immunology Research Institute, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
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Windhaber S, Xin Q, Uckeley ZM, Koch J, Obr M, Garnier C, Luengo-Guyonnot C, Duboeuf M, Schur FKM, Lozach PY. The Orthobunyavirus Germiston Enters Host Cells from Late Endosomes. J Virol 2022; 96:e0214621. [PMID: 35019710 PMCID: PMC8906410 DOI: 10.1128/jvi.02146-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/03/2022] [Indexed: 01/01/2023] Open
Abstract
With more than 80 members worldwide, the Orthobunyavirus genus in the Peribunyaviridae family is a large genus of enveloped RNA viruses, many of which are emerging pathogens in humans and livestock. How orthobunyaviruses (OBVs) penetrate and infect mammalian host cells remains poorly characterized. Here, we investigated the entry mechanisms of the OBV Germiston (GERV). Viral particles were visualized by cryo-electron microscopy and appeared roughly spherical with an average diameter of 98 nm. Labeling of the virus with fluorescent dyes did not adversely affect its infectivity and allowed the monitoring of single particles in fixed and live cells. Using this approach, we found that endocytic internalization of bound viruses was asynchronous and occurred within 30 to 40 min. The virus entered Rab5a-positive (Rab5a+) early endosomes and, subsequently, late endosomal vacuoles containing Rab7a but not LAMP-1. Infectious entry did not require proteolytic cleavage, and endosomal acidification was sufficient and necessary for viral fusion. Acid-activated penetration began 15 to 25 min after initiation of virus internalization and relied on maturation of early endosomes to late endosomes. The optimal pH for viral membrane fusion was slightly below 6.0, and penetration was hampered when the potassium influx was abolished. Overall, our study provides real-time visualization of GERV entry into host cells and demonstrates the importance of late endosomal maturation in facilitating OBV penetration. IMPORTANCE Orthobunyaviruses (OBVs), which include La Crosse, Oropouche, and Schmallenberg viruses, represent a growing threat to humans and domestic animals worldwide. Ideally, preventing OBV spread requires approaches that target early stages of infection, i.e., virus entry. However, little is known about the molecular and cellular mechanisms by which OBVs enter and infect host cells. Here, we developed accurate, sensitive tools and assays to investigate the penetration process of GERV. Our data emphasize the central role of late endosomal maturation in GERV entry, providing a comprehensive overview of the early stages of an OBV infection. Our study also brings a complete toolbox of innovative methods to study each step of the OBV entry program in fixed and living cells, from virus binding and endocytosis to fusion and penetration. The information gained herein lays the foundation for the development of antiviral strategies aiming to block OBV entry.
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Affiliation(s)
- Stefan Windhaber
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Qilin Xin
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
| | - Zina M. Uckeley
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Jana Koch
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Martin Obr
- Institute of Science and Technology Austria, Klosterneuburg, Austria
| | | | | | | | | | - Pierre-Yves Lozach
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
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Vlasov I, Panteleeva A, Usenko T, Nikolaev M, Izumchenko A, Gavrilova E, Shlyk I, Miroshnikova V, Shadrina M, Polushin Y, Pchelina S, Slonimsky P. Transcriptomic Profiles Reveal Downregulation of Low-Density Lipoprotein Particle Receptor Pathway Activity in Patients Surviving Severe COVID-19. Cells 2021; 10:3495. [PMID: 34944005 PMCID: PMC8700658 DOI: 10.3390/cells10123495] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/02/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
To assess the biology of the lethal endpoint in patients with SARS-CoV-2 infection, we compared the transcriptional response to the virus in patients who survived or died during severe COVID-19. We applied gene expression profiling to generate transcriptional signatures for peripheral blood mononuclear cells (PBMCs) from patients with SARS-CoV-2 infection at the time when they were placed in the Intensive Care Unit of the Pavlov First State Medical University of St. Petersburg (Russia). Three different bioinformatics approaches to RNA-seq analysis identified a downregulation of three common pathways in survivors compared with nonsurvivors among patients with severe COVID-19, namely, low-density lipoprotein (LDL) particle receptor activity (GO:0005041), important for maintaining cholesterol homeostasis, leukocyte differentiation (GO:0002521), and cargo receptor activity (GO:0038024). Specifically, PBMCs from surviving patients were characterized by reduced expression of PPARG, CD36, STAB1, ITGAV, and ANXA2. Taken together, our findings suggest that LDL particle receptor pathway activity in patients with COVID-19 infection is associated with poor disease prognosis.
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Affiliation(s)
- Ivan Vlasov
- Institute of Molecular Genetics of National Research Center “Kurchatov Institute”, 123182 Moscow, Russia; (I.V.); (M.S.)
| | - Alexandra Panteleeva
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
| | - Tatiana Usenko
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
| | - Mikhael Nikolaev
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
| | - Artem Izumchenko
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
| | - Elena Gavrilova
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
| | - Irina Shlyk
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
| | - Valentina Miroshnikova
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
| | - Maria Shadrina
- Institute of Molecular Genetics of National Research Center “Kurchatov Institute”, 123182 Moscow, Russia; (I.V.); (M.S.)
| | - Yurii Polushin
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
| | - Sofya Pchelina
- Pavlov First Saint-Petersburg State Medical University, 197022 Saint-Petersburg, Russia; (A.P.); (T.U.); (M.N.); (E.G.); (I.S.); (V.M.); (Y.P.); (S.P.)
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Center “Kurchatov Institute”, 188300 Saint-Petersburg, Russia;
- Kurchatov Genome Center—PNPI, 188300 Saint-Petersburg, Russia
| | - Petr Slonimsky
- Institute of Molecular Genetics of National Research Center “Kurchatov Institute”, 123182 Moscow, Russia; (I.V.); (M.S.)
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Ritter M, Bresgen N, Kerschbaum HH. From Pinocytosis to Methuosis-Fluid Consumption as a Risk Factor for Cell Death. Front Cell Dev Biol 2021; 9:651982. [PMID: 34249909 PMCID: PMC8261248 DOI: 10.3389/fcell.2021.651982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/29/2021] [Indexed: 12/11/2022] Open
Abstract
The volumes of a cell [cell volume (CV)] and its organelles are adjusted by osmoregulatory processes. During pinocytosis, extracellular fluid volume equivalent to its CV is incorporated within an hour and membrane area equivalent to the cell's surface within 30 min. Since neither fluid uptake nor membrane consumption leads to swelling or shrinkage, cells must be equipped with potent volume regulatory mechanisms. Normally, cells respond to outwardly or inwardly directed osmotic gradients by a volume decrease and increase, respectively, i.e., they shrink or swell but then try to recover their CV. However, when a cell death (CD) pathway is triggered, CV persistently decreases in isotonic conditions in apoptosis and it increases in necrosis. One type of CD associated with cell swelling is due to a dysfunctional pinocytosis. Methuosis, a non-apoptotic CD phenotype, occurs when cells accumulate too much fluid by macropinocytosis. In contrast to functional pinocytosis, in methuosis, macropinosomes neither recycle nor fuse with lysosomes but with each other to form giant vacuoles, which finally cause rupture of the plasma membrane (PM). Understanding methuosis longs for the understanding of the ionic mechanisms of cell volume regulation (CVR) and vesicular volume regulation (VVR). In nascent macropinosomes, ion channels and transporters are derived from the PM. Along trafficking from the PM to the perinuclear area, the equipment of channels and transporters of the vesicle membrane changes by retrieval, addition, and recycling from and back to the PM, causing profound changes in vesicular ion concentrations, acidification, and-most importantly-shrinkage of the macropinosome, which is indispensable for its proper targeting and cargo processing. In this review, we discuss ion and water transport mechanisms with respect to CVR and VVR and with special emphasis on pinocytosis and methuosis. We describe various aspects of the complex mutual interplay between extracellular and intracellular ions and ion gradients, the PM and vesicular membrane, phosphoinositides, monomeric G proteins and their targets, as well as the submembranous cytoskeleton. Our aim is to highlight important cellular mechanisms, components, and processes that may lead to methuotic CD upon their derangement.
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Affiliation(s)
- Markus Ritter
- Center for Physiology, Pathophysiology and Biophysics, Institute for Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
- Institute for Physiology and Pathophysiology, Paracelsus Medical University, Nuremberg, Germany
- Gastein Research Institute, Paracelsus Medical University, Salzburg, Austria
- Ludwig Boltzmann Institute for Arthritis und Rehabilitation, Salzburg, Austria
- Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - Nikolaus Bresgen
- Department of Biosciences, University of Salzburg, Salzburg, Austria
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Orthobunyaviruses: From Virus Binding to Penetration into Mammalian Host Cells. Viruses 2021; 13:v13050872. [PMID: 34068494 PMCID: PMC8151349 DOI: 10.3390/v13050872] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 12/04/2022] Open
Abstract
With over 80 members worldwide, Orthobunyavirus is the largest genus in the Peribunyaviridae family. Orthobunyaviruses (OBVs) are arthropod-borne viruses that are structurally simple, with a trisegmented, negative-sense RNA genome and only four structural proteins. OBVs are potential agents of emerging and re-emerging diseases and overall represent a global threat to both public and veterinary health. The focus of this review is on the very first steps of OBV infection in mammalian hosts, from virus binding to penetration and release of the viral genome into the cytosol. Here, we address the most current knowledge and advances regarding OBV receptors, endocytosis, and fusion.
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12
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Genetic Screens Identify Host Factors for SARS-CoV-2 and Common Cold Coronaviruses. Cell 2021; 184:106-119.e14. [PMID: 33333024 PMCID: PMC7723770 DOI: 10.1016/j.cell.2020.12.004] [Citation(s) in RCA: 263] [Impact Index Per Article: 87.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/13/2020] [Accepted: 12/01/2020] [Indexed: 12/30/2022]
Abstract
The Coronaviridae are a family of viruses that cause disease in humans ranging from mild respiratory infection to potentially lethal acute respiratory distress syndrome. Finding host factors common to multiple coronaviruses could facilitate the development of therapies to combat current and future coronavirus pandemics. Here, we conducted genome-wide CRISPR screens in cells infected by SARS-CoV-2 as well as two seasonally circulating common cold coronaviruses, OC43 and 229E. This approach correctly identified the distinct viral entry factors ACE2 (for SARS-CoV-2), aminopeptidase N (for 229E), and glycosaminoglycans (for OC43). Additionally, we identified phosphatidylinositol phosphate biosynthesis and cholesterol homeostasis as critical host pathways supporting infection by all three coronaviruses. By contrast, the lysosomal protein TMEM106B appeared unique to SARS-CoV-2 infection. Pharmacological inhibition of phosphatidylinositol kinases and cholesterol homeostasis reduced replication of all three coronaviruses. These findings offer important insights for the understanding of the coronavirus life cycle and the development of host-directed therapies.
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13
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Sui B, Chen D, Liu W, Tian B, Lv L, Pei J, Wu Q, Zhou M, Fu ZF, Zhang Y, Zhao L. Comparison of lncRNA and mRNA expression in mouse brains infected by a wild-type and a lab-attenuated Rabies lyssavirus. J Gen Virol 2020; 102. [PMID: 33284098 DOI: 10.1099/jgv.0.001538] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Rabies is a lethal disease caused by Rabies lyssavirus, commonly known as rabies virus (RABV), and results in nearly 100 % death once clinical symptoms occur in human and animals. Long non-coding RNAs (lncRNAs) have been reported to be associated with viral infection. But the role of lncRNAs involved in RABV infection is still elusive. In this study, we performed global transcriptome analysis of both of lncRNA and mRNA expression profiles in wild-type (WT) and lab-attenuated RABV-infected mouse brains by using next-generation sequencing. The differentially expressed lncRNAs and mRNAs were analysed by using the edgeR package. We identified 1422 differentially expressed lncRNAs and 4475 differentially expressed mRNAs by comparing WT and lab-attenuated RABV-infected brains. Then we predicted the enriched biological pathways by the Gene Ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) database based on the differentially expressed lncRNAs and mRNAs. Our analysis revealed the relationships between lncRNAs and RABV-infection-associated immune response and ion transport-related pathways, which provide a fresh insight into the potential role of lncRNA in immune evasion and neuron injury induced by WT RABV.
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Affiliation(s)
- Baokun Sui
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Dong Chen
- ABLife BioBigData Institute, Wuhan, 430075, PR China
| | - Wei Liu
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Bin Tian
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Lei Lv
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Jie Pei
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Qiong Wu
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ming Zhou
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Zhen F Fu
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Yi Zhang
- ABLife BioBigData Institute, Wuhan, 430075, PR China
| | - Ling Zhao
- Key Laboratory of Preventive Veterinary Medicine of Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
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14
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Sheep and Cattle Are Not Susceptible to Experimental Inoculation with Hazara Orthonairovirus, a Tick-Borne Arbovirus Closely Related to CCHFV. Microorganisms 2020; 8:microorganisms8121927. [PMID: 33291703 PMCID: PMC7761912 DOI: 10.3390/microorganisms8121927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/26/2020] [Accepted: 12/02/2020] [Indexed: 11/24/2022] Open
Abstract
Hazara orthonairovirus (HAZV) is a tick-borne arbovirus closely related to Crimean–Congo hemorrhagic fever orthonairovirus (CCHFV). Whereas CCHFV is a biosafety level (BSL) 4 agent, HAZV is classified as BSL 2, as it is not known to cause any disease in humans. Belonging to the same serogroup as CCHFV, HAZV might act as a model which can provide a better understanding of this important zoonosis. Furthermore, the serological relatedness may cause diagnostic problems if antibodies against HAZV interfere with current CCHFV serological assays. Therefore, sheep and cattle—important natural hosts for CCHFV—were experimentally infected with HAZV to prove their susceptibility and evaluate potential antibody cross-reactivities. According to this study, neither sheep nor cattle are susceptible to experimental HAZV infections. Consequently, the HAZV infection in ruminants is clearly distinct from CCHFV infections. Sera of immunized animals weakly cross-reacted between HAZV and CCHFV in immunofluorescence and immunoblot assays, but not in commercial CCHFV ELISAs commonly used for field studies.
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15
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Pearson H, Todd EJAA, Ahrends M, Hover SE, Whitehouse A, Stacey M, Lippiat JD, Wilkens L, Fieguth HG, Danov O, Hesse C, Barr JN, Mankouri J. TMEM16A/ANO1 calcium-activated chloride channel as a novel target for the treatment of human respiratory syncytial virus infection. Thorax 2020; 76:64-72. [PMID: 33109690 PMCID: PMC7803913 DOI: 10.1136/thoraxjnl-2020-215171] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/27/2020] [Accepted: 09/07/2020] [Indexed: 12/24/2022]
Abstract
Introduction Human respiratory syncytial virus (HRSV) is a common cause of respiratory tract infections (RTIs) globally and is one of the most fatal infectious diseases for infants in developing countries. Of those infected, 25%–40% aged ≤1 year develop severe lower RTIs leading to pneumonia and bronchiolitis, with ~10% requiring hospitalisation. Evidence also suggests that HRSV infection early in life is a major cause of adult asthma. There is no HRSV vaccine, and the only clinically approved treatment is immunoprophylaxis that is expensive and only moderately effective. New anti-HRSV therapeutic strategies are therefore urgently required. Methods It is now established that viruses require cellular ion channel functionality to infect cells. Here, we infected human lung epithelial cell lines and ex vivo human lung slices with HRSV in the presence of a defined panel of chloride (Cl−) channel modulators to investigate their role during the HRSV life-cycle. Results We demonstrate the requirement for TMEM16A, a calcium-activated Cl− channel, for HRSV infection. Time-of-addition assays revealed that the TMEM16A blockers inhibit HRSV at a postentry stage of the virus life-cycle, showing activity as a postexposure prophylaxis. Another important negative-sense RNA respiratory pathogen influenza virus was also inhibited by the TMEM16A-specific inhibitor T16Ainh-A01. Discussion These findings reveal TMEM16A as an exciting target for future host-directed antiviral therapeutics.
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Affiliation(s)
| | | | - Mareike Ahrends
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hanover, Germany
| | | | | | | | - Jonathan D Lippiat
- University of Leeds, Leeds, UK.,School of Biomedical Sciences, University of Leeds, Leeds, UK
| | | | | | - Olga Danov
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hanover, Germany
| | - Christina Hesse
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hanover, Germany
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16
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Wang R, Simoneau CR, Kulsuptrakul J, Bouhaddou M, Travisano K, Hayashi JM, Carlson-Stevermer J, Oki J, Holden K, Krogan NJ, Ott M, Puschnik AS. Functional genomic screens identify human host factors for SARS-CoV-2 and common cold coronaviruses. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020:2020.09.24.312298. [PMID: 32995787 PMCID: PMC7523113 DOI: 10.1101/2020.09.24.312298] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The Coronaviridae are a family of viruses that causes disease in humans ranging from mild respiratory infection to potentially lethal acute respiratory distress syndrome. Finding host factors that are common to multiple coronaviruses could facilitate the development of therapies to combat current and future coronavirus pandemics. Here, we conducted parallel genome-wide CRISPR screens in cells infected by SARS-CoV-2 as well as two seasonally circulating common cold coronaviruses, OC43 and 229E. This approach correctly identified the distinct viral entry factors ACE2 (for SARS-CoV-2), aminopeptidase N (for 229E) and glycosaminoglycans (for OC43). Additionally, we discovered phosphatidylinositol phosphate biosynthesis and cholesterol homeostasis as critical host pathways supporting infection by all three coronaviruses. By contrast, the lysosomal protein TMEM106B appeared unique to SARS-CoV-2 infection. Pharmacological inhibition of phosphatidylinositol phosphate biosynthesis and cholesterol homeostasis reduced replication of all three coronaviruses. These findings offer important insights for the understanding of the coronavirus life cycle as well as the potential development of host-directed therapies.
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Affiliation(s)
- Ruofan Wang
- Chan Zuckerberg Biohub, San Francisco, CA, 94158, USA
| | | | | | - Mehdi Bouhaddou
- Gladstone Institutes, San Francisco, CA 94158, USA
- University of California San Francisco, Quantitative Biosciences Institute (QBI), San Francisco, CA, 94158, USA
- University of California San Francisco, Department of Cellular and Molecular Pharmacology, San Francisco, CA, 94158, USA
| | | | | | | | | | | | - Nevan J. Krogan
- Gladstone Institutes, San Francisco, CA 94158, USA
- University of California San Francisco, Quantitative Biosciences Institute (QBI), San Francisco, CA, 94158, USA
- University of California San Francisco, Department of Cellular and Molecular Pharmacology, San Francisco, CA, 94158, USA
| | - Melanie Ott
- Gladstone Institutes, San Francisco, CA 94158, USA
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17
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Ion Channels as Therapeutic Targets for Viral Infections: Further Discoveries and Future Perspectives. Viruses 2020; 12:v12080844. [PMID: 32756358 PMCID: PMC7472218 DOI: 10.3390/v12080844] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/11/2022] Open
Abstract
Ion channels play key roles in almost all facets of cellular physiology and have emerged as key host cell factors for a multitude of viral infections. A catalogue of ion channel-blocking drugs have been shown to possess antiviral activity, some of which are in widespread human usage for ion channel-related diseases, highlighting new potential for drug repurposing. The emergence of ion channel–virus interactions has also revealed the intriguing possibility that channelopathies may explain some commonly observed virus induced pathologies. This field is rapidly evolving and an up-to-date summary of new discoveries can inform future perspectives. We herein discuss the role of ion channels during viral lifecycles, describe the recently identified ion channel drugs that can inhibit viral infections, and highlight the potential contribution of ion channels to virus-mediated disease.
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18
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Novel Ionophores Active against La Crosse Virus Identified through Rapid Antiviral Screening. Antimicrob Agents Chemother 2020; 64:AAC.00086-20. [PMID: 32284379 DOI: 10.1128/aac.00086-20] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/03/2020] [Indexed: 12/18/2022] Open
Abstract
Bunyaviruses are significant human pathogens, causing diseases ranging from hemorrhagic fevers to encephalitis. Among these viruses, La Crosse virus (LACV), a member of the California serogroup, circulates in the eastern and midwestern United States. While LACV infection is often asymptomatic, dozens of cases of encephalitis are reported yearly. Unfortunately, no antivirals have been approved to treat LACV infection. Here, we developed a method to rapidly test potential antivirals against LACV infection. From this screen, we identified several potential antiviral molecules, including known antivirals. Additionally, we identified many novel antivirals that exhibited antiviral activity without affecting cellular viability. Valinomycin, a potassium ionophore, was among our top targets. We found that valinomycin exhibited potent anti-LACV activity in multiple cell types in a dose-dependent manner. Valinomycin did not affect particle stability or infectivity, suggesting that it may preclude virus replication by altering cellular potassium ions, a known determinant of LACV entry. We extended these results to other ionophores and found that the antiviral activity of valinomycin extended to other viral families, including bunyaviruses (Rift Valley fever virus, Keystone virus), enteroviruses (coxsackievirus, rhinovirus), flavirivuses (Zika virus), and coronaviruses (human coronavirus 229E [HCoV-229E] and Middle East respiratory syndrome CoV [MERS-CoV]). In all viral infections, we observed significant reductions in virus titer in valinomycin-treated cells. In sum, we demonstrate the importance of potassium ions to virus infection, suggesting a potential therapeutic target to disrupt virus replication.
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19
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Dobson SJ, Mankouri J, Whitehouse A. Identification of potassium and calcium channel inhibitors as modulators of polyomavirus endosomal trafficking. Antiviral Res 2020; 179:104819. [PMID: 32389733 PMCID: PMC7205714 DOI: 10.1016/j.antiviral.2020.104819] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/02/2020] [Accepted: 05/04/2020] [Indexed: 12/12/2022]
Abstract
During virus entry, members of the Polyomaviridae transit the endolysosomal network en route to the endoplasmic reticulum (ER), from which degraded capsids escape into the cytoplasm and enter the nucleus. Emerging evidence suggests that viruses require both endosomal acidification and the correct ionic balance of K+ and Ca2+ ions in endosomes for correct virus trafficking and genome release. Here, using two polyomaviruses with different capsid architectures, namely Simian virus 40 (SV40) and Merkel cell polyomavirus (MCPyV), we describe methods to rapidly quantify virus infection using IncuCyte ZOOM imaging analysis, and use this system to investigate the role of both K+ and Ca2+ channels during the early stages of virus entry. Using broad spectrum blockers of both K+ and Ca2+ channels to specifically target host cell ion channel functionality, we show that MCPyV, but not SV40 can be inhibited by K+ channel modulators, whilst both viruses are restricted by the broad spectrum Ca2+ channel inhibitor verapamil. Using a panel of more specific Ca2+ blockers, we show that both MCPyV and SV40 are dependent on the activity of two-pore Ca2+ channels (TPCs), as the TPC-specific blocker tetrandrine prevented capsid disassembly and nuclear transport required for virus entry. We therefore reveal a novel target to restrict the entry of polyomaviruses, which given the known role of TPCs during endolysosomal-ER fusion, is likely to be applicable to other viruses that transit this pathway. We describe novel high-throughput assays to study SV40 and MCPyV infection. MCPyV, but not SV40, is sensitive to K+ channel inhibition. Verapamil inhibits MCPyV and SV40 infection. Tetrandrine is a potent inhibitor of MCPyV and SV40 infection. Two-pore channel 1/2 activity is essential for polyomavirus entry.
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Affiliation(s)
- Samuel J Dobson
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, United Kingdom
| | - Jamel Mankouri
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, United Kingdom; Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom.
| | - Adrian Whitehouse
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, United Kingdom; Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom.
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20
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Panou MM, Antoni M, Morgan EL, Loundras EA, Wasson CW, Welberry-Smith M, Mankouri J, Macdonald A. Glibenclamide inhibits BK polyomavirus infection in kidney cells through CFTR blockade. Antiviral Res 2020; 178:104778. [PMID: 32229236 PMCID: PMC7322401 DOI: 10.1016/j.antiviral.2020.104778] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/07/2020] [Accepted: 03/18/2020] [Indexed: 02/08/2023]
Abstract
BK polyomavirus (BKPyV) is a ubiquitous pathogen in the human population that is asymptomatic in healthy individuals, but can be life-threatening in those undergoing kidney transplant. To-date, no vaccines or anti-viral therapies are available to treat human BKPyV infections. New therapeutic strategies are urgently required. In this study, using a rational pharmacological screening regimen of known ion channel modulating compounds, we show that BKPyV requires cystic fibrosis transmembrane conductance regulator (CFTR) activity to infect primary renal proximal tubular epithelial cells. Disrupting CFTR function through treatment with the clinically available drug glibenclamide, the CFTR inhibitor CFTR172, or CFTR-silencing, all reduced BKPyV infection. Specifically, time of addition assays and the assessment of the exposure of VP2/VP3 minor capsid proteins indicated a role for CFTR during BKPyV transport to the endoplasmic reticulum, an essential step during the early stages of BKPyV infection. We thus establish CFTR as an important host-factor in the BKPyV life cycle and reveal CFTR modulators as potential anti-BKPyV therapies. BK polyomavirus (BKPyV) is life-threatening in those undergoing kidney transplant. BKPyV requires CFTR to infect primary kidney cells. Disrupting CFTR function pharmacologically reduces BKPyV infection. CFTR is required during BKPyV transport to the endoplasmic reticulum.
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Affiliation(s)
- Margarita-Maria Panou
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
| | - Michelle Antoni
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
| | - Ethan L Morgan
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
| | - Eleni-Anna Loundras
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
| | - Christopher W Wasson
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
| | | | - Jamel Mankouri
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom.
| | - Andrew Macdonald
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom.
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