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Wang T, Zeng H, Kang J, Lei L, Liu J, Zheng Y, Qian W, Fan C. Establishment of a Nucleic Acid Detection Method for Norovirus GII.2 Genotype Based on RT-RPA and CRISPR/Cas12a-LFS. Pol J Microbiol 2024; 73:253-262. [PMID: 38905280 PMCID: PMC11192556 DOI: 10.33073/pjm-2024-023] [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: 03/09/2024] [Accepted: 05/09/2024] [Indexed: 06/23/2024] Open
Abstract
To establish a rapid detection method for norovirus GII.2 genotype, this study employed reverse transcription recombinase polymerase amplification (RT-RPA) combined with CRISPR/Cas12a and lateral flow strip (RT-RPA-Cas12a-LFS). Here, the genome of norovirus GII.2 genotype was compared to identify highly conserved sequences, facilitating the design of RT-RPA primers and crRNA specific to the conserved regions of norovirus GII.2. Subsequently, the reaction parameters of RT-RPA were optimized and evaluated using agar-gel electrophoresis and LFS. The results indicate that the conserved sequences of norovirus GII.2 were successfully amplified through RT-RPA at 37°C for 25 minutes. Additionally, CRISPR/Cas12a-mediated cleavage detection was achieved through LFS at 37°C within 10 minutes using the amplification products as templates. Including the isothermal amplification reaction time, the total time is 35 minutes. The established RT-RPA-Cas12a-LFS method demonstrated specific detection of norovirus GII.2, yielding negative results for other viral genomes, and exhibited an excellent detection limit of 10 copies/μl. The RT-RPA-Cas12a-LFS method was further compared with qRT-PCR by analyzing 60 food-contaminated samples. The positive conformity rate was 100%, the negative conformity rate was 95.45%, and the overall conformity rate reached 98.33%. This detection method for norovirus GII.2 genotype is cost-effective, highly sensitive, specific, and easy to operate, offering a promising technical solution for field-based detection of the norovirus GII.2 genotype.
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Affiliation(s)
- Ting Wang
- School of Biomedical and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xian, China
| | - Hao Zeng
- School of Biomedical and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xian, China
| | - Jie Kang
- Shaanxi Institute of Supervision and Testing on Product Quality, Xian, China
| | - Lanlan Lei
- Shaanxi Institute of Supervision and Testing on Product Quality, Xian, China
| | - Jing Liu
- Shaanxi Institute of Supervision and Testing on Product Quality, Xian, China
| | - Yuhong Zheng
- Shaanxi Institute of Supervision and Testing on Product Quality, Xian, China
| | - Weidong Qian
- School of Biomedical and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xian, China
| | - Cheng Fan
- Shaanxi Institute of Supervision and Testing on Product Quality, Xian, China
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2
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Álvarez ÁL, Arboleya A, Abade dos Santos FA, García-Manso A, Nicieza I, Dalton KP, Parra F, Martín-Alonso JM. Highs and Lows in Calicivirus Reverse Genetics. Viruses 2024; 16:866. [PMID: 38932159 PMCID: PMC11209508 DOI: 10.3390/v16060866] [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: 03/24/2024] [Revised: 05/25/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024] Open
Abstract
In virology, the term reverse genetics refers to a set of methodologies in which changes are introduced into the viral genome and their effects on the generation of infectious viral progeny and their phenotypic features are assessed. Reverse genetics emerged thanks to advances in recombinant DNA technology, which made the isolation, cloning, and modification of genes through mutagenesis possible. Most virus reverse genetics studies depend on our capacity to rescue an infectious wild-type virus progeny from cell cultures transfected with an "infectious clone". This infectious clone generally consists of a circular DNA plasmid containing a functional copy of the full-length viral genome, under the control of an appropriate polymerase promoter. For most DNA viruses, reverse genetics systems are very straightforward since DNA virus genomes are relatively easy to handle and modify and are also (with few notable exceptions) infectious per se. This is not true for RNA viruses, whose genomes need to be reverse-transcribed into cDNA before any modification can be performed. Establishing reverse genetics systems for members of the Caliciviridae has proven exceptionally challenging due to the low number of members of this family that propagate in cell culture. Despite the early successful rescue of calicivirus from a genome-length cDNA more than two decades ago, reverse genetics methods are not routine procedures that can be easily extrapolated to other members of the family. Reports of calicivirus reverse genetics systems have been few and far between. In this review, we discuss the main pitfalls, failures, and delays behind the generation of several successful calicivirus infectious clones.
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Affiliation(s)
- Ángel L. Álvarez
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Aroa Arboleya
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Fábio A. Abade dos Santos
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
- Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal
| | - Alberto García-Manso
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Inés Nicieza
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Kevin P. Dalton
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Francisco Parra
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
| | - José M. Martín-Alonso
- Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain
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Hayashi T, Kobayashi S, Hirano J, Murakami K. Human norovirus cultivation systems and their use in antiviral research. J Virol 2024; 98:e0166323. [PMID: 38470106 PMCID: PMC11019851 DOI: 10.1128/jvi.01663-23] [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] [Indexed: 03/13/2024] Open
Abstract
Human norovirus (HuNoV) is a major cause of acute gastroenteritis and foodborne diseases, affecting all age groups. Despite its clinical needs, no approved antiviral therapies are available. Since the discovery of HuNoV in 1972, studies on anti-norovirals, mechanism of HuNoV infection, viral inactivation, etc., have been hampered by the lack of a robust laboratory-based cultivation system for HuNoV. A recent breakthrough in the development of HuNoV cultivation systems has opened opportunities for researchers to investigate HuNoV biology in the context of de novo HuNoV infections. A tissue stem cell-derived human intestinal organoid/enteroid (HIO) culture system is one of those that supports HuNoV replication reproducibly and, to our knowledge, is most widely distributed to laboratories worldwide to study HuNoV and develop therapeutic strategies. This review summarizes recently developed HuNoV cultivation systems, including HIO, and their use in antiviral studies.
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Affiliation(s)
- Tsuyoshi Hayashi
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Sakura Kobayashi
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Junki Hirano
- Laboratory of Virus Control, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Kosuke Murakami
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
- Center for Emergency Preparedness and Response, National Institute of Infectious Diseases, Tokyo, Japan
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4
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Ishiyama R, Yoshida K, Oikawa K, Takai-Todaka R, Kato A, Kanamori K, Nakanishi A, Haga K, Katayama K. Production of infectious reporter murine norovirus by VP2 trans-complementation. J Virol 2024; 98:e0126123. [PMID: 38226813 PMCID: PMC10878090 DOI: 10.1128/jvi.01261-23] [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: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 01/17/2024] Open
Abstract
Human norovirus (HuNoV) causes gastroenteritis, a disease with no effective therapy or vaccine, and does not grow well in culture. Murine norovirus (MNV) easily replicates in cell cultures and small animals and has often been used as a model to elucidate the structural and functional characteristics of HuNoV. An MNV plasmid-based reverse genetics system was developed to produce the modified recombinant virus. In this study, we attempted to construct the recombinant virus by integrating a foreign gene into MNV ORF3, which encodes the minor structural protein VP2. Deletion of VP2 expression abolished infectious particles from MNV cDNA clones, and supplying exogenous VP2 to the cells rescued the infectivity of cDNA clones without VP2 expression. In addition, the coding sequence of C-terminal ORF3 was essential for cDNA clones compensated with VP2 to produce infectious particles. Furthermore, the recombinant virus with exogenous reporter genes in place of the dispensable region of ORF3 was propagated when VP2 was constitutively supplied. Our findings indicate that foreign genes can be transduced into the norovirus ORF3 region when VP2 is supplied and that successive propagation of modified recombinant norovirus could lead to the development of norovirus-based vaccines or therapeutics.IMPORTANCEIn this study, we revealed that some of the coding regions of ORF3 could be replaced by a foreign gene and infectious virus could be produced when VP2 was supplied. Propagation of this virus depended on VP2 being supplied in trans, indicating that this virus could infect only once. Our findings help to elucidate the functions of VP2 in the virus lifecycle and to develop other caliciviral vectors for recombinant attenuated live enteric virus vaccines or therapeutics tools.
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Affiliation(s)
- Ryoka Ishiyama
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuhiro Yoshida
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Kazuki Oikawa
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Reiko Takai-Todaka
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Akiko Kato
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Kumiko Kanamori
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Akira Nakanishi
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
- Department of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kei Haga
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuhiko Katayama
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
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5
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Mills JT, Minogue SC, Snowden JS, Arden WKC, Rowlands DJ, Stonehouse NJ, Wobus CE, Herod MR. Amino acid substitutions in norovirus VP1 dictate host dissemination via variations in cellular attachment. J Virol 2023; 97:e0171923. [PMID: 38032199 PMCID: PMC10734460 DOI: 10.1128/jvi.01719-23] [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: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 12/01/2023] Open
Abstract
IMPORTANCE All viruses initiate infection by utilizing receptors to attach to target host cells. These virus-receptor interactions can therefore dictate viral replication and pathogenesis. Understanding the nature of virus-receptor interactions could also be important for the development of novel therapies. Noroviruses are non-enveloped icosahedral viruses of medical importance. They are a common cause of acute gastroenteritis with no approved vaccine or therapy and are a tractable model for studying fundamental virus biology. In this study, we utilized the murine norovirus model system to show that variation in a single amino acid of the major capsid protein alone can affect viral infectivity through improved attachment to suspension cells. Modulating plasma membrane mobility reduced infectivity, suggesting an importance of membrane mobility for receptor recruitment and/or receptor conformation. Furthermore, different substitutions at this site altered viral tissue distribution in a murine model, illustrating how in-host capsid evolution could influence viral infectivity and/or immune evasion.
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Affiliation(s)
- Jake T. Mills
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Susanna C. Minogue
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Joseph S. Snowden
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Wynter K. C. Arden
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - David J. Rowlands
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Nicola J. Stonehouse
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Christiane E. Wobus
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Morgan R. Herod
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
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Sion E, Ab-Rahim S, Muhamad M. Trends on Human Norovirus Virus-like Particles (HuNoV-VLPs) and Strategies for the Construction of Infectious Viral Clones toward In Vitro Replication. Life (Basel) 2023; 13:1447. [PMID: 37511822 PMCID: PMC10381778 DOI: 10.3390/life13071447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/07/2023] [Accepted: 06/10/2023] [Indexed: 07/30/2023] Open
Abstract
Most acute gastroenteritis (AGE) outbreaks and sporadic cases in developing countries are attributable to infection by human norovirus (HuNoV), the enteric virus mainly transmitted via fecal-contaminated water. However, it has been challenging to study HuNoV due to the lack of suitable systems to cultivate and replicate the virus, hindering the development of treatments and vaccines. Researchers have been using virus-like particles (VLPs) and infectious viral clones to overcome this challenge as alternatives to fresh virus isolates in various in vitro and ex vivo models. VLPs are multiprotein structures that mimic the wild-type virus but cannot replicate in host cells due to the lack of genetic materials for replication, limiting downstream analysis of the virus life cycle and pathogenesis. The development of in vitro cloning systems has shown promise for HuNoV replication studies. This review discusses the approaches for constructing HuNoV-VLPs and infectious viral clones, the techniques involved, and the challenges faced. It also highlights the relationship between viral genes and their protein products and provides a perspective on technical considerations for producing efficient HuNoV-VLPs and infectious viral clones, which could substitute for native human noroviruses in future studies.
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Affiliation(s)
- Emilly Sion
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
| | - Sharaniza Ab-Rahim
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
| | - Mudiana Muhamad
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
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Lin SC, Bai GH, Lin PC, Chen CY, Hsu YH, Lee YC, Chen SY. Molecular and Genetics-Based Systems for Tracing the Evolution and Exploring the Mechanisms of Human Norovirus Infections. Int J Mol Sci 2023; 24:ijms24109093. [PMID: 37240438 DOI: 10.3390/ijms24109093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/09/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Human noroviruses (HuNoV) are major causes of acute gastroenteritis around the world. The high mutation rate and recombination potential of noroviruses are significant challenges in studying the genetic diversity and evolution pattern of novel strains. In this review, we describe recent advances in the development of technologies for not only the detection but also the analysis of complete genome sequences of noroviruses and the future prospects of detection methods for tracing the evolution and genetic diversity of human noroviruses. The mechanisms of HuNoV infection and the development of antiviral drugs have been hampered by failure to develop the infectious virus in a cell model. However, recent studies have demonstrated the potential of reverse genetics for the recovery and generation of infectious viral particles, suggesting the utility of this genetics-based system as an alternative for studying the mechanisms of viral infection, such as cell entry and replication.
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Affiliation(s)
- Sheng-Chieh Lin
- Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
- Division of Allergy, Asthma, and Immunology, Department of Pediatrics, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
| | - Geng-Hao Bai
- Department of Internal Medicine, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei City 10002, Taiwan
| | - Pei-Chun Lin
- Division of Pediatric Gastroenterology, Department of Pediatrics, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
| | - Chung-Yung Chen
- Department of Bioscience Technology, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
- Center for Nanotechnology, Institute of Biomedical Technology, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
| | - Yi-Hsiang Hsu
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Yuan-Chang Lee
- Department of Infectious Diseases, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
- Department of Infectious Diseases, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
| | - Shih-Yen Chen
- Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
- Division of Pediatric Gastroenterology, Department of Pediatrics, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
- TMU Research Center for Digestive Medicine, Taipei Medical University, Taipei City 11031, Taiwan
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8
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Hung CH, Yen JB, Chang PJ, Chen LW, Huang TY, Tsai WJ, Tsai YC. Characterization of Human Norovirus Nonstructural Protein NS1.2 Involved in the Induction of the Filamentous Endoplasmic Reticulum, Enlarged Lipid Droplets, LC3 Recruitment, and Interaction with NTPase and NS4. Viruses 2023; 15:v15030812. [PMID: 36992520 PMCID: PMC10053803 DOI: 10.3390/v15030812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/09/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023] Open
Abstract
Human noroviruses (HuNVs) are the leading cause of gastroenteritis worldwide. NS1.2 is critical for HuNV pathogenesis, but the function is still unclear. The GII NS1.2 of HuNVs, unlike GI NS1.2, was localized to the endoplasmic reticulum (ER) and lipid droplets (LDs) and is accompanied by a distorted-filamentous ER morphology and aggregated-enlarged LDs. LC3 was recruited to the NS1.2-localized membrane through an autophagy-independent pathway. NS1.2, expressed from a cDNA clone of GII.4 norovirus, formed complexes with NTPase and NS4, which exhibited aggregated vesicle-like structures that were also colocalized with LC3 and LDs. NS1.2 is structurally divided into three domains from the N terminus: an inherently disordered region (IDR), a region that contains a putative hydrolase with the H-box/NC catalytic center (H-box/NC), and a C-terminal 251-330 a.a. region containing membrane-targeting domain. All three functional domains of NS1.2 were required for the induction of the filamentous ER. The IDR was essential for LC3 recruitment by NS1.2. Both the H-Box/NC and membrane-targeting domains are required for the induction of aggregated-enlarged LDs, NS1.2 self-assembly, and interaction with NTPase. The membrane-targeting domain was sufficient to interact with NS4. The study characterized the NS1.2 domain required for membrane targeting and protein-protein interactions, which are crucial for forming a viral replication complex.
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Affiliation(s)
- Chien-Hui Hung
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Internal Medicine, Division of Infectious Diseases, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
| | - Ju-Bei Yen
- Department of Pediatrics, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
| | - Pey-Jium Chang
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan 33302, Taiwan
| | - Lee-Wen Chen
- Department of Respiratory Care, Chung Gung University of Science and Technology, Chiayi 61363, Taiwan
| | - Tsung-Yu Huang
- Department of Internal Medicine, Division of Infectious Diseases, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
| | - Wan-Ju Tsai
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yu-Chin Tsai
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan 33302, Taiwan
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Mills JT, Minogue SC, Snowden JS, Arden WKC, Rowlands DJ, Stonehouse NJ, Wobus CE, Herod MR. Amino acid substitutions in norovirus VP1 dictate cell tropism via an attachment process dependent on membrane mobility. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.17.528071. [PMID: 36824911 PMCID: PMC9949111 DOI: 10.1101/2023.02.17.528071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Viruses interact with receptors on the cell surface to initiate and co-ordinate infection. The distribution of receptors on host cells can be a key determinant of viral tropism and host infection. Unravelling the complex nature of virus-receptor interactions is, therefore, of fundamental importance to understanding viral pathogenesis. Noroviruses are non-enveloped, icosahedral, positive-sense RNA viruses of global importance to human health, with no approved vaccine or antiviral agent available. Here we use murine norovirus as a model for the study of molecular mechanisms of virus-receptor interactions. We show that variation at a single amino acid residue in the major viral capsid protein had a key impact on the interaction between virus and receptor. This variation did not affect virion production or virus growth kinetics, but a specific amino acid was rapidly selected through evolution experiments, and significantly improved cellular attachment when infecting immune cells in suspension. However, reducing plasma membrane mobility counteracted this phenotype, providing insight into for the role of membrane fluidity and receptor recruitment in norovirus cellular attachment. When the infectivity of a panel of recombinant viruses with single amino acid variations was compared in vivo, there were significant differences in the distribution of viruses in a murine model, demonstrating a role in cellular tropism in vivo. Overall, these results highlight the importance of lipid rafts and virus-induced receptor recruitment in viral infection, as well as how capsid evolution can greatly influence cellular tropism, within-host spread and pathogenicity.
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Affiliation(s)
- Jake T Mills
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Susanna C Minogue
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Joseph S Snowden
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Wynter K C Arden
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48130, USA
| | - David J Rowlands
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Nicola J Stonehouse
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Christiane E Wobus
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48130, USA
| | - Morgan R Herod
- Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
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10
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Zhang Q, Zhu S, Zhang X, Su L, Ni J, Zhang Y, Fang L. Recent insights into reverse genetics of norovirus. Virus Res 2023; 325:199046. [PMID: 36657615 DOI: 10.1016/j.virusres.2023.199046] [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: 08/28/2022] [Revised: 12/23/2022] [Accepted: 01/15/2023] [Indexed: 01/18/2023]
Abstract
Norovirus is the leading cause of viral gastroenteritis globally, and poses substantial threats to public health. Despite substantial progress made in preventing norovirus diseases, the lack of a robust virus culture system has hampered biological research and effective strategies to combat this pathogen. Reverse genetic system is the technique to generate infectious viruses from cloned genetic constructs, which is a powerful tool for the investigation of viral pathogenesis and for the development of novel drugs and vaccines. The strategies of reverse genetics include bacterial artificial chromosomes, vaccinia virus vectors, and entirely plasmid-based systems. Since each strategy has its pros and cons, choosing appropriate approaches will greatly improve the efficiency of virus rescue. Reverse genetic systems that have been employed for norovirus greatly extend its life cycle and facilitate the development of medical countermeasures. In this review, we summarize the current knowledge on the structure, transmission, genetic evolution and clinical manifestations of norovirus, and describe recent advances in the studies of norovirus reverse genetics as well as its future prospects for therapeutics and vaccine development.
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Affiliation(s)
- Qinyi Zhang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China; Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Shuirong Zhu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | | | - Lingxuan Su
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Jun Ni
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Yanjun Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
| | - Lei Fang
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China.
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11
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Tohma K, Ushijima H. [Molecular epidemiology and evolution of human noroviruses]. Uirusu 2023; 73:17-32. [PMID: 39343517 DOI: 10.2222/jsv.73.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Noroviruses are the most common viral cause of acute gastroenteritis after the introduction of rotavirus vaccines. Norovirus infection can cause severe symptoms in vulnerable populations including young children and the elderly. Thus, it is still a leading cause of death from diarrhea in children in developing countries. Recent advancement of genomics platforms facilitated understanding of the epidemiology of norovirus, while the whole picture of norovirus diversity is still undetermined. Currently, there are no approved vaccines for norovirus, but state-of-the-art norovirus cultivation systems could elucidate the antigenic diversity of this fast-evolving virus. In this review, we will summarize the historical and latest findings of norovirus epidemiology, diversity, and evolution.
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Affiliation(s)
- Kentaro Tohma
- Division of Viral Products, US Food and Drug Administration, Maryland, Unites States
| | - Hiroshi Ushijima
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
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12
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Reverse genetics in virology: A double edged sword. BIOSAFETY AND HEALTH 2022. [DOI: 10.1016/j.bsheal.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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13
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Oishi W, Sato M, Kubota K, Ishiyama R, Takai-Todaka R, Haga K, Katayama K, Sano D. Experimental Adaptation of Murine Norovirus to Calcium Hydroxide. Front Microbiol 2022; 13:848439. [PMID: 35432235 PMCID: PMC9009222 DOI: 10.3389/fmicb.2022.848439] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/21/2022] [Indexed: 11/18/2022] Open
Abstract
Slaked lime (calcium hydroxide) is a commonly used disinfectant for fecal sludge. Although viruses are inactivated by lime treatment, whether RNA viruses adapt to lime treatment has not yet been determined. Here, we show that murine norovirus developed higher tolerance during serial passages with lime treatment. We compared synonymous and non-synonymous nucleotide diversities of the three open reading frames of viral genome and revealed that virus populations were subjected to enhanced purifying selection over the course of serial passages with lime treatment. Virus adaptation to lime treatment was coincident with amino acid substitution of lysine to arginine at position 345 (K345R) on the major capsid protein VP1, which accounted for more than 90% of the population. The infectious clones with the K345R produced using a plasmid-based reverse genetics system exhibited greater tolerance in a lime solution, which indicated that the specific amino acid substitution was solely involved in the viral tolerance in lime treatment.
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Affiliation(s)
- Wakana Oishi
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - Mikiko Sato
- Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Kengo Kubota
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan
- Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Ryoka Ishiyama
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Reiko Takai-Todaka
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kei Haga
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuhiko Katayama
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Daisuke Sano
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan
- Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
- Research Institute for Humanity and Nature, Kyoto, Japan
- *Correspondence: Daisuke Sano,
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14
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Mboko WP, Chhabra P, Valcarce MD, Costantini V, Vinjé J. Advances in understanding of the innate immune response to human norovirus infection using organoid models. J Gen Virol 2022; 103:10.1099/jgv.0.001720. [PMID: 35077345 PMCID: PMC8984994 DOI: 10.1099/jgv.0.001720] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023] Open
Abstract
Norovirus is the leading cause of epidemic and endemic acute gastroenteritis worldwide and the most frequent cause of foodborne illness in the United States. There is no specific treatment for norovirus infections and therapeutic interventions are based on alleviating symptoms and limiting viral transmission. The immune response to norovirus is not completely understood and mechanistic studies have been hindered by lack of a robust cell culture system. In recent years, the human intestinal enteroid/human intestinal organoid system (HIE/HIO) has enabled successful human norovirus replication. Cells derived from HIE have also successfully been subjected to genetic manipulation using viral vectors as well as CRISPR/Cas9 technology, thereby allowing studies to identify antiviral signaling pathways important in controlling norovirus infection. RNA sequencing using HIE cells has been used to investigate the transcriptional landscape during norovirus infection and to identify antiviral genes important in infection. Other cell culture platforms such as the microfluidics-based gut-on-chip technology in combination with the HIE/HIO system also have the potential to address fundamental questions on innate immunity to human norovirus. In this review, we highlight the recent advances in understanding the innate immune response to human norovirus infections in the HIE system, including the application of advanced molecular technologies that have become available in recent years such as the CRISPR/Cas9 and RNA sequencing, as well as the potential application of single cell transcriptomics, viral proteomics, and gut-on-a-chip technology to further elucidate innate immunity to norovirus.
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Affiliation(s)
- Wadzanai P. Mboko
- Viral Gastroenteritis Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Preeti Chhabra
- Viral Gastroenteritis Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Marta Diez Valcarce
- Viral Gastroenteritis Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
- Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
| | - Veronica Costantini
- Viral Gastroenteritis Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Jan Vinjé
- Viral Gastroenteritis Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
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15
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Shimoike T, Hayashi T, Oka T, Muramatsu M. The predicted stem-loop structure in the 3'-end of the human norovirus antigenomic sequence is required for its genomic RNA synthesis by its RdRp. J Biol Chem 2021; 297:101225. [PMID: 34562449 PMCID: PMC8526979 DOI: 10.1016/j.jbc.2021.101225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/13/2021] [Accepted: 09/20/2021] [Indexed: 11/26/2022] Open
Abstract
The norovirus genome consists of a single positive-stranded RNA. The mechanism by which this single-stranded RNA genome is replicated is not well understood. To reveal the mechanism underlying the initiation of the norovirus genomic RNA synthesis by its RNA-dependent RNA polymerase (RdRp), we used an in vitro assay to detect the complementary RNA synthesis activity. Results showed that the purified recombinant RdRp was able to synthesize the complementary positive-sense RNA from a 100-nt template corresponding to the 3′-end of the viral antisense genome sequence, but that the RdRp could not synthesize the antisense genomic RNA from the template corresponding to the 5′-end of the positive-sense genome sequence. We also predicted that the 31 nt region at the 3′-end of the RNA antisense template forms a stem-loop structure. Deletion of this sequence resulted in the loss of complementary RNA synthesis by the RdRp, and connection of the 31 nt to the 3′-end of the inactive positive-sense RNA template resulted in the gain of complementary RNA synthesis by the RdRp. Similarly, an electrophoretic mobility shift assay further revealed that the RdRp bound to the antisense RNA specifically, but was dependent on the 31 nt at the 3′-end. Therefore, based on this observation and further deletion and mutation analyses, we concluded that the predicted stem-loop structure in the 31 nt end and the region close to the antisense viral genomic stem sequences are both important for initiating the positive-sense human norovirus genomic RNA synthesis by its RdRp.
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Affiliation(s)
- Takashi Shimoike
- Department of Virology II, National Institute of Infectious Diseases, Musashi-Murayama, Tokyo, Japan.
| | - Tsuyoshi Hayashi
- Department of Virology II, National Institute of Infectious Diseases, Musashi-Murayama, Tokyo, Japan
| | - Tomoichiro Oka
- Department of Virology II, National Institute of Infectious Diseases, Musashi-Murayama, Tokyo, Japan
| | - Masamichi Muramatsu
- Department of Virology II, National Institute of Infectious Diseases, Musashi-Murayama, Tokyo, Japan
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16
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Zheng Z, Li Y, Zhang M, Liu Y, Fu M, Gong S, Hu Q. Human Norovirus NTPase Antagonizes Interferon-β Production by Interacting With IkB Kinase ε. Front Microbiol 2021; 12:687933. [PMID: 34335514 PMCID: PMC8319745 DOI: 10.3389/fmicb.2021.687933] [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: 03/30/2021] [Accepted: 06/17/2021] [Indexed: 12/29/2022] Open
Abstract
Human norovirus (HuNoV) is the leading cause of epidemic acute gastroenteritis worldwide. Type I interferons (IFN)-α/β are highly potent cytokines that are initially identified for their essential roles in antiviral defense. It was reported that HuNoV infection did not induce IFN-β expression but was controlled in the presence of IFN-β in human intestinal enteroids and a gnotobiotic pig model, suggesting that HuNoV has likely developed evasion countermeasures. In this study, we found that a cDNA clone of GII.4 HuNoV, the predominantly circulating genotype worldwide, inhibits the production of IFN-β and identified the viral NTPase as a key component responsible for such inhibition. HuNoV NTPase not only inhibits the activity of IFN-β promoter but also the mRNA and protein production of IFN-β. Additional studies indicate that NTPase inhibits the phosphorylation and nuclear translocation of interferon-regulatory factor-3 (IRF-3), leading to the suppression of IFN-β promoter activation. Mechanistically, NTPase interacts with IkB kinase ε (IKKε), an important factor for IRF-3 phosphorylation, and such interaction blocks the association of IKKε with unanchored K48-linked polyubiquitin chains, resulting in the inhibition of IKKε phosphorylation. Further studies demonstrated that the 1-179 aa domain of NTPase which interacts with IKKε is critical for the suppression of IFN-β production. Our findings highlight the role of HuNoV NTPase in the inhibition of IFN-β production, providing insights into a novel mechanism underlying how HuNoV evades the host innate immunity.
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Affiliation(s)
- Zifeng Zheng
- The Joint Laboratory of Translational Precision Medicine, Guangzhou Women and Children's Medical Center, Guangzhou, China.,The Joint Laboratory of Translational Precision Medicine, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Yuncheng Li
- State Key Laboratory of Virology, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China
| | - Mudan Zhang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yalan Liu
- State Key Laboratory of Virology, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Ming Fu
- The Joint Laboratory of Translational Precision Medicine, Guangzhou Women and Children's Medical Center, Guangzhou, China.,The Joint Laboratory of Translational Precision Medicine, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Sitang Gong
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Qinxue Hu
- State Key Laboratory of Virology, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,Institute for Infection and Immunity, St George's, University of London, London, United Kingdom
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17
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CD300lf Conditional Knockout Mouse Reveals Strain-Specific Cellular Tropism of Murine Norovirus. J Virol 2021; 95:JVI.01652-20. [PMID: 33177207 DOI: 10.1128/jvi.01652-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/02/2020] [Indexed: 02/07/2023] Open
Abstract
Noroviruses are a leading cause of gastrointestinal infection in humans and mice. Understanding human norovirus (HuNoV) cell tropism has important implications for our understanding of viral pathogenesis. Murine norovirus (MNoV) is extensively used as a surrogate model for HuNoV. We previously identified CD300lf as the receptor for MNoV. Here, we generated a Cd300lf conditional knockout (CD300lfF/F ) mouse to elucidate the cell tropism of persistent and nonpersistent strains of murine norovirus. Using this mouse model, we demonstrated that CD300lf expression on intestinal epithelial cells (IECs), and on tuft cells in particular, is essential for transmission of the persistent MNoV strain CR6 (MNoVCR6) in vivo In contrast, the nonpersistent MNoV strain CW3 (MNoVCW3) does not require CD300lf expression on IECs for infection. However, deletion of CD300lf in myelomonocytic cells (LysM Cre+) partially reduces CW3 viral load in lymphoid and intestinal tissues. Disruption of CD300lf expression on B cells (CD19 Cre), neutrophils (Mrp8 Cre), and dendritic cells (CD11c Cre) did not affect MNoVCW3 viral RNA levels. Finally, we show that the transcription factor STAT1, which is critical for the innate immune response, partially restricts the cell tropism of MNoVCW3 to LysM+ cells. Taken together, these data demonstrate that CD300lf expression on tuft cells is essential for MNoVCR6; that myelomonocytic cells are a major, but not exclusive, target cell of MNoVCW3; and that STAT1 signaling restricts the cellular tropism of MNoVCW3 This study provides the first genetic system for studying the cell type-specific role of CD300lf in norovirus pathogenesis.IMPORTANCE Human noroviruses (HuNoVs) are a leading cause of gastroenteritis resulting in up to 200,000 deaths each year. The receptor and cell tropism of HuNoV in immunocompetent humans are unclear. We use murine norovirus (MNoV) as a model for HuNoV. We recently identified CD300lf as the sole physiologic receptor for MNoV. Here, we leverage this finding to generate a Cd300lf conditional knockout mouse to decipher the contributions of specific cell types to MNoV infection. We demonstrate that persistent MNoVCR6 requires CD300lf expression on tuft cells. In contrast, multiple CD300lf+ cell types, dominated by myelomonocytic cells, are sufficient for nonpersistent MNoVCW3 infection. CD300lf expression on epithelial cells, B cells, neutrophils, and dendritic cells is not critical for MNoVCW3 infection. Mortality associated with the MNoVCW3 strain in Stat1-/- mice does not require CD300lf expression on LysM+ cells, highlighting that both CD300lf receptor expression and innate immunity regulate MNoV cell tropism in vivo.
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18
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Song C, Takai-Todaka R, Miki M, Haga K, Fujimoto A, Ishiyama R, Oikawa K, Yokoyama M, Miyazaki N, Iwasaki K, Murakami K, Katayama K, Murata K. Dynamic rotation of the protruding domain enhances the infectivity of norovirus. PLoS Pathog 2020; 16:e1008619. [PMID: 32614892 PMCID: PMC7331980 DOI: 10.1371/journal.ppat.1008619] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/11/2020] [Indexed: 12/16/2022] Open
Abstract
Norovirus is the major cause of epidemic nonbacterial gastroenteritis worldwide. Lack of structural information on infection and replication mechanisms hampers the development of effective vaccines and remedies. Here, using cryo-electron microscopy, we show that the capsid structure of murine noroviruses changes in response to aqueous conditions. By twisting the flexible hinge connecting two domains, the protruding (P) domain reversibly rises off the shell (S) domain in solutions of higher pH, but rests on the S domain in solutions of lower pH. Metal ions help to stabilize the resting conformation in this process. Furthermore, in the resting conformation, the cellular receptor CD300lf is readily accessible, and thus infection efficiency is significantly enhanced. Two similar P domain conformations were also found simultaneously in the human norovirus GII.3 capsid, although the mechanism of the conformational change is not yet clear. These results provide new insights into the mechanisms of non-enveloped norovirus transmission that invades host cells, replicates, and sometimes escapes the hosts immune system, through dramatic environmental changes in the gastrointestinal tract.
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Affiliation(s)
- Chihong Song
- National Institute for Physiological Sciences, Okazaki, Japan
| | - Reiko Takai-Todaka
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | | | - Kei Haga
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Akira Fujimoto
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Ryoka Ishiyama
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuki Oikawa
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | | | - Naoyuki Miyazaki
- Institute for Protein Research, Osaka University, Suita, Japan
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Japan
| | - Kenji Iwasaki
- Institute for Protein Research, Osaka University, Suita, Japan
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Japan
| | | | - Kazuhiko Katayama
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
- National Institute of Infectious Diseases, Tokyo, Japan
- * E-mail: (KK); (KM)
| | - Kazuyoshi Murata
- National Institute for Physiological Sciences, Okazaki, Japan
- * E-mail: (KK); (KM)
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19
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Murakami K, Tenge VR, Karandikar UC, Lin SC, Ramani S, Ettayebi K, Crawford SE, Zeng XL, Neill FH, Ayyar BV, Katayama K, Graham DY, Bieberich E, Atmar RL, Estes MK. Bile acids and ceramide overcome the entry restriction for GII.3 human norovirus replication in human intestinal enteroids. Proc Natl Acad Sci U S A 2020; 117:1700-1710. [PMID: 31896578 PMCID: PMC6983410 DOI: 10.1073/pnas.1910138117] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Human noroviruses (HuNoVs) cause sporadic and epidemic outbreaks of gastroenteritis in all age groups worldwide. We previously reported that stem cell-derived human intestinal enteroid (HIE) cultures support replication of multiple HuNoV strains and that some strains (e.g., GII.3) replicate only in the presence of bile. Heat- and trypsin-treatment of bile did not reduce GII.3 replication, indicating a nonproteinaceous component in bile functions as an active factor. Here we show that bile acids (BAs) are critical for GII.3 replication and replication correlates with BA hydrophobicity. Using the highly effective BA, glycochenodeoxycholic acid (GCDCA), we show BAs act during the early stage of infection, BA-dependent replication in HIEs is not mediated by detergent effects or classic farnesoid X receptor or Takeda G protein-coupled receptor 5 signaling but involves another G protein-coupled receptor, sphingosine-1-phosphate receptor 2, and BA treatment of HIEs increases particle uptake. We also demonstrate that GCDCA induces multiple cellular responses that promote GII.3 replication in HIEs, including enhancement of 1) endosomal uptake, 2) endosomal acidification and subsequent activity of endosomal/lysosomal enzyme acid sphingomyelinase (ASM), and 3) ceramide levels on the apical membrane. Inhibitors of endosomal acidification or ASM reduce GII.3 infection and exogenous addition of ceramide alone permits infection. Furthermore, inhibition of lysosomal exocytosis of ASM, which is required for ceramide production at the apical surface, decreases GII.3 infection. Together, our results support a model where GII.3 exploits rapid BA-mediated cellular endolysosomal dynamic changes and cellular ceramide to enter and replicate in jejunal HIEs.
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Affiliation(s)
- Kosuke Murakami
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
- Department of Virology II, National Institute of Infectious Diseases, Musashi-murayama, Tokyo 208-0011, Japan
| | - Victoria R Tenge
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Umesh C Karandikar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Shih-Ching Lin
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Sasirekha Ramani
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Khalil Ettayebi
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Sue E Crawford
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Xi-Lei Zeng
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Frederick H Neill
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - B Vijayalakshmi Ayyar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Kazuhiko Katayama
- Department of Virology II, National Institute of Infectious Diseases, Musashi-murayama, Tokyo 208-0011, Japan
- Laboratory of Viral Infection I, Kitasato Institute for Life Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - David Y Graham
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
- Department of Medicine, Michael E. DeBakey VA Medical Center, Houston, TX 77030
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Erhard Bieberich
- Department of Physiology, University of Kentucky, Lexington, KY 40506
| | - Robert L Atmar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Mary K Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030;
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030
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20
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Katayama K. [Review Norovirus]. Uirusu 2020; 70:117-128. [PMID: 34544926 DOI: 10.2222/jsv.70.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Noroviruses commonly cause infectious gastroenteritis and massive food poisoning. There is an urgent need to elucidate the infection mechanism of noroviruses and to develop vaccines and therapeutic drugs. In addition to human disease, noroviruses have been implicated in animal disease. Noroviruses that cause murine diseases can be propagated in strained cultured cells, and for many years, murine norovirus has been used as a model for human noroviruses that could not be propagated in cultured cells. That model and advances in technology have been instrumental in basic studies of noroviruses. From structural biology, noroviruses undergo dynamic shape changes to improve their infectivity when they infect cells. New culture techniques have made human intestinal organoids available for studying the mechanisms of pathogenic expression of human noroviruses in the intestinal tract, mechanisms of infection growth, and the search for receptor molecules. Vaccines and antivirals using human intestinal organoids are under active development, and some are already in clinical trials. In this paper, I review the latest research results, vaccine development, and other advances from the history of norovirus discovery.
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Affiliation(s)
- Kazuhiko Katayama
- Laboratory of Viral Infection I, Department of Infection Control and Immunology, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University
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21
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Abstract
PURPOSE OF REVIEW Noroviruses are a major cause of gastroenteritis. This review summarizes new information on noroviruses that may lead to the development of improved measures for limiting their human health impact. RECENT FINDINGS GII.4 strains remain the most common human noroviruses causing disease, although GII.2 and GII.17 strains have recently emerged as dominant strains in some populations. Histo-blood group antigen (HBGA) expression on the gut mucosa drives susceptibility to different norovirus strains. Antibodies that block virus binding to these glycans correlate with protection from infection and illness. Immunocompromised patients are significantly impacted by norovirus infection, and the increasing availability of molecular diagnostics has improved infection recognition. Human noroviruses can be propagated in human intestinal enteroid cultures containing enterocytes that are a significant primary target for initiating infection. Strain-specific requirements for replication exist with bile being essential for some strains. Several vaccine candidates are progressing through preclinical and clinical development and studies of potential antiviral interventions are underway. SUMMARY Norovirus epidemiology is complex and requires continued surveillance to track the emergence of new strains and recombinants, especially with the continued progress in vaccine development. Humans are the best model to study disease pathogenesis and prevention. New in-vitro cultivation methods should lead to better approaches for understanding virus-host interactions and ultimately to improved strategies for mitigation of human norovirus-associated disease.
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22
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The surface-exposed loop region of norovirus GII.3 VP1 plays an essential role in binding histo-blood group antigens. Arch Virol 2019; 164:1629-1638. [PMID: 30968211 DOI: 10.1007/s00705-019-04256-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 03/14/2019] [Indexed: 10/27/2022]
Abstract
Trypsin digestion promotes disassembly of GII.3 NoV virus-like particles (VLPs) and binding of VLPs to salivary histo-blood group antigens (HBGAs), but it is not clear which specific regions or residues mediate viral attachment to HBGAs. An earlier study indicated that arginine residues in the predicted surface-exposed loop region are susceptible to trypsin digestion. Here, we introduced single or multiple substitutions of four arginine residues located in the predicted surface-exposed loop region of the GII.3 NoV capsid protein (VP1) and observed their effects on susceptibility to trypsin digestion and binding to HBGAs. All of the mutations in VP1, including single substitutions (R287G, R292G, R296G or R307G) and quadruple substitutions (R287G, R292G, R296G and R307G), permitted successful VLP assembly. After tryptic digestion, all VP1 proteins bearing single point mutations were cleaved, resulting in complete digestion or single fragments with various molecular sizes (27-35 kDa), while the VP1 protein bearing four substitutions was cleaved into two fragments (27-55 kDa). Binding assays using synthetic and salivary HBGAs showed that none of the VP1 mutants (singly or quadruply substituted) exhibited detectable binding to HBGA before or after trypsin cleavage. These results indicated that arginine residues within the predicted surface loop region of GII.3 NoV VP1 were involved directly or indirectly in binding salivary HBGAs and could potentially mediate the HBGA-GII.3 NoV interactions through which host cells become infected.
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Todd KV, Tripp RA. Human Norovirus: Experimental Models of Infection. Viruses 2019; 11:v11020151. [PMID: 30759780 PMCID: PMC6410082 DOI: 10.3390/v11020151] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 12/21/2022] Open
Abstract
Human noroviruses (HuNoVs) are a leading cause of acute gastroenteritis worldwide. HuNoV infections lead to substantial societal and economic burdens. There are currently no licensed vaccines or therapeutics for the prevention or treatment of HuNoVs. A lack of well-characterized in vitro and in vivo infection models has limited the development of HuNoV countermeasures. Experimental infection of human volunteers and the use of related viruses such as murine NoV have provided helpful insights into HuNoV biology and vaccine and therapeutic development. There remains a need for robust animal models and reverse genetic systems to further HuNoV research. This review summarizes available HuNoV animal models and reverse genetic systems, while providing insight into their usefulness for vaccine and therapeutic development.
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Affiliation(s)
- Kyle V Todd
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.
| | - Ralph A Tripp
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.
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24
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Yang Y, Xia M, Wang L, Arumugam S, Wang Y, Ou X, Wang C, Jiang X, Tan M, Chen Y, Li X. Structural basis of host ligand specificity change of GII porcine noroviruses from their closely related GII human noroviruses. Emerg Microbes Infect 2019; 8:1642-1657. [PMID: 31711377 PMCID: PMC6853222 DOI: 10.1080/22221751.2019.1686335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/20/2019] [Indexed: 02/07/2023]
Abstract
Diverse noroviruses infect humans and animals via the recognition of host-specific glycan ligands. Genogroup II (GII) noroviruses consist of human noroviruses (huNoVs) that generally bind histo-blood group antigens (HBGAs) as host factors and three porcine norovirus (porNoV) genotypes (GII.11/18/19) that form a genetic lineage lacking HBGA-binding ability. Thus, these GII porNoVs provide an excellent model to study norovirus evolution with host ligand specificity changes. Here we solved the crystal structures of a native GII.11 porNoV P protein and a closely-related GII.3 huNoV P protein complexed with an HBGA, focusing on the HBGA-binding sites (HBSs) compared with the previously known ones to understand the structural basis of the host ligand specificity change. We found that the GII.3 huNoV binds HBGAs via a conventional GII HBS that uses an arginine instead of the conserved aromatic residue for the required Van der Waals interaction, while the GII.11 porNoV HBS loses its HBGA-binding function because of two mutations (Q355/V451). A mutant that reversed the two mutated residues back to the conventional A355/Y451 restored the HBGA-binding function of the GII.11 porNoV P protein, which validated our observations. Similar mutations are also found in GII.19 porNoVs and a GII.19 P protein mutant with double reverse mutations restored the HBS function. This is the first reconstruction of a functional HBS based on one with new host specificity back to its parental one. These data shed light on the molecular basis of structural adaptation of the GII porNoVs to the pig hosts through mutations at their HBSs.
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Affiliation(s)
- Yang Yang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Ming Xia
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Leyi Wang
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Sahaana Arumugam
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Yajing Wang
- College of Life Science, Nankai University, Tianjin, People’s Republic of China
| | - Xianjin Ou
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Chenlong Wang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Xi Jiang
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ming Tan
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Yutao Chen
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Xuemei Li
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
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Abstract
Norovirus is the commonest cause of gastrointestinal disease worldwide in. Infections with norovirus occur in all age groups, however, the highest incidence is in children aged less than five years. Surveillance of norovirus is complicated because most people do not contact medical services when they are ill. Nevertheless, Public health laboratory surveillance worldwide has demonstrated the dominance of GII.4 viruses in the population. Better epidemiological surveillance and outbreak investigations, coupled with wider implementation of molecular-based laboratory diagnostics are leading to better estimates of the burden of norovirus infections as well as improved outbreak control. Recent advances in cell culture systems for norovirus and current research investigating the distribution of norovirus-associated disease in the population, for whom the disease burden is greatest, understanding host susceptibility factors, and methodologies for ascertaining cases, are important in increasing our understanding of norovirus. The key to surveillance of norovirus is allying the epidemiology with surveillance of virology. With recent advances in laboratory culture systems for norovirus, next generation sequencing technologies, improved diagnostics and measuring phenotypic characteristics of noroviruses, there are new opportunities to advance understanding of this common and important human pathogen that will help design strategies for vaccine and antiviral development, and how these might be best deployed to control norovirus infection.
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Affiliation(s)
- David J Allen
- a Department of Pathogen Molecular Biology , Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine , London , UK.,c NIHR Heath Protection Research Unit in Gastrointestinal Infections , Liverpool , UK
| | - John P Harris
- b Institute of Psychology Health and Society, Faculty of Health and Life Science, University of Liverpool , Liverpool , UK.,c NIHR Heath Protection Research Unit in Gastrointestinal Infections , Liverpool , UK
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26
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Oliveira LM, Blawid R, Orílio AF, Andrade BYG, Souza ACA, Nagata T. Development of an infectious clone and replicon system of norovirus GII.4. J Virol Methods 2018; 258:49-53. [PMID: 29800592 DOI: 10.1016/j.jviromet.2018.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/15/2018] [Accepted: 05/18/2018] [Indexed: 01/17/2023]
Abstract
Human norovirus (HuNoV) is one of the main causes of acute gastroenteritis worldwide and is responsible for at least 20% of all cases. The detailed molecular mechanism of this norovirus remains unknown due to the lack of a suitable in vitro culturing system. An infectious clone of HuNoV would be a useful tool for elucidating the processes of viral infection and the mechanisms of replication. We developed an infectious cDNA clone of HuNoV using the rapid technique of Gibson Assembly. The complete genome of the HuNoV GII.4 Sydney subtype was cloned into a previously modified pcDNA3.1-based plasmid vector downstream from a cytomegaloviral promoter. We monitored the viral infection in vitro by inserting the reporter gene of the green fluorescent protein (GFP) between the NTPase and p22 genes, also by Gibson Assembly, to construct a HuNoV-GFP replicon. Human Caco-2 cells were transfected with the full-length genomic clone and the replicon containing GFP. The gene encoding the VP1/VP2 capsid protein was expressed, which was indirect evidence of the synthesis of subgenomic RNAs and thus the negative strand of the genome. We successfully constructed the infectious clone and its replicon containing GFP for the HuNoV GII.4 Sydney subtype, a valuable tool that will help the study of noroviral infection and replication.
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Affiliation(s)
- L M Oliveira
- Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil; Pós-graduação em Biologia Molecular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - R Blawid
- Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - A F Orílio
- Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - B Y G Andrade
- Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - A C A Souza
- Engenharia de Bioprocessos e de Biotecnologia, Universidade Federal do Tocantins, Gurupi, TO, Brazil
| | - T Nagata
- Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil; Pós-graduação em Biologia Molecular, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil.
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27
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Subcellular Localization and Functional Characterization of GII.4 Norovirus-Encoded NTPase. J Virol 2018; 92:JVI.01824-17. [PMID: 29212938 PMCID: PMC5809722 DOI: 10.1128/jvi.01824-17] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/29/2017] [Indexed: 12/27/2022] Open
Abstract
The genotype II.4 (GII.4) variants of human noroviruses (HuNVs) are recognized as the major agent of global gastroenteritis outbreaks. Due to the lack of an efficient cell culture system for HuNV propagation, the exact roles of HuNV-encoded nonstructural proteins (including Nterm, NTPase, P22, VPg, Pro, and RdRp) in viral replication or pathogenesis have not yet been fully understood. Here, we report the molecular characterization of the GII.4 HuNV-encoded NTPase (designated GII-NTPase). Results from our studies showed that GII-NTPase forms vesicular or nonvesicular textures in the cell cytoplasm, and the nonvesicular fraction of GII-NTPase significantly localizes to the endoplasmic reticulum (ER) or mitochondria. Deletion analysis revealed that the N-terminal 179-amino-acid (aa) region of GII-NTPase is required for vesicle formation and for ER colocalization, whereas the C-terminal region is involved in mitochondrial colocalization. In particular, two mitochondrion-targeting domains were identified in the C-terminal region of GII-NTPase which perfectly colocalized with mitochondria when the N-terminal region of GII-NTPase was deleted. However, the corresponding C-terminal portions of NTPase derived from the GI HuNV did not show mitochondrial colocalization. We also found that GII-NTPase physically interacts with itself as well as with Nterm and P22, but not VPg, Pro, and RdRp, in cells. The Nterm- and P22-interacting region was mapped to the N-terminal 179-aa region of GII-NTPase, whereas the self-assembly of GII-NTPase could be achieved via a head-to-head, tail-to-tail, or head-to-tail configuration. More importantly, we demonstrate that GII-NTPase possesses a proapoptotic activity, which can be further enhanced by coexpression with Nterm or P22. IMPORTANCE Despite the importance of human norovirus GII.4 variants in global gastroenteritis outbreaks, the basic biological functions of the viral nonstructural proteins in cells remain rarely investigated. In this report, we focus our studies on characteristics of the GII.4 norovirus-encoded NTPase (GII-NTPase). We unexpectedly find that GII-NTPase can perfectly colocalize with mitochondria after its N-terminal region is deleted. However, such a phenomenon is not observed for NTPase encoded by a GI strain. We further reveal that the N-terminal 179-aa region of GII-NTPase is sufficient to mediate (i) vesicle formation, (ii) ER colocalization, (iii) the interaction with two other nonstructural proteins, including Nterm and P22, (iv) the formation of homodimers or homo-oligomers, and (v) the induction of cell apoptosis. Taken together, our findings emphasize that the virus-encoded NTPase must have multiple activities during viral replication or pathogenesis; however, these activities may vary somewhat among different genogroups.
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28
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Doerflinger SY, Cortese M, Romero-Brey I, Menne Z, Tubiana T, Schenk C, White PA, Bartenschlager R, Bressanelli S, Hansman GS, Lohmann V. Membrane alterations induced by nonstructural proteins of human norovirus. PLoS Pathog 2017; 13:e1006705. [PMID: 29077760 PMCID: PMC5678787 DOI: 10.1371/journal.ppat.1006705] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 11/08/2017] [Accepted: 10/20/2017] [Indexed: 01/09/2023] Open
Abstract
Human noroviruses (huNoV) are the most frequent cause of non-bacterial acute gastroenteritis worldwide, particularly genogroup II genotype 4 (GII.4) variants. The viral nonstructural (NS) proteins encoded by the ORF1 polyprotein induce vesical clusters harboring the viral replication sites. Little is known so far about the ultrastructure of these replication organelles or the contribution of individual NS proteins to their biogenesis. We compared the ultrastructural changes induced by expression of norovirus ORF1 polyproteins with those induced upon infection with murine norovirus (MNV). Characteristic membrane alterations induced by ORF1 expression resembled those found in MNV infected cells, consisting of vesicle accumulations likely built from the endoplasmic reticulum (ER) which included single membrane vesicles (SMVs), double membrane vesicles (DMVs) and multi membrane vesicles (MMVs). In-depth analysis using electron tomography suggested that MMVs originate through the enwrapping of SMVs with tubular structures similar to mechanisms reported for picornaviruses. Expression of GII.4 NS1-2, NS3 and NS4 fused to GFP revealed distinct membrane alterations when analyzed by correlative light and electron microscopy. Expression of NS1-2 induced proliferation of smooth ER membranes forming long tubular structures that were affected by mutations in the active center of the putative NS1-2 hydrolase domain. NS3 was associated with ER membranes around lipid droplets (LDs) and induced the formation of convoluted membranes, which were even more pronounced in case of NS4. Interestingly, NS4 was the only GII.4 protein capable of inducing SMV and DMV formation when expressed individually. Our work provides the first ultrastructural analysis of norovirus GII.4 induced vesicle clusters and suggests that their morphology and biogenesis is most similar to picornaviruses. We further identified NS4 as a key factor in the formation of membrane alterations of huNoV and provide models of the putative membrane topologies of NS1-2, NS3 and NS4 to guide future studies. Positive-strand RNA viruses induce membrane alterations harboring the viral replication complexes. In the case of human noroviruses (huNoV), the major cause of acute viral gastroenteritis, these are induced by the ORF1 polyprotein, which is post-translationally processed into the functional nonstructural (NS) proteins. Partly due to the lack of efficient cell culture models, little is known so far about membrane alterations induced by huNoV belonging to the most clinically relevant genogroup II, genotype 4 (GII.4), nor about the function of individual NS proteins in their formation. We therefore expressed ORF1 proteins of GII.4 and individual NS proteins in cells to study their contribution to viral replication complex formation. Expression of ORF1 proteins of GII.4 induced vesicular membrane alterations comparable to those found in infected cells and similar to picornaviruses and hepatitis C virus (HCV). GII.4 NS1-2, NS3 and NS4 are contributing to viral membrane alterations. Our work provides new insights into their function in huNoV induced replication complex formation while identifying NS4 as the most important single determinant. This knowledge might provide novel attractive targets for future therapies inhibiting the formation of the membranous viral replication complex, as exemplified by the efficacy of HCV NS5A inhibitors.
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Affiliation(s)
- Sylvie Y. Doerflinger
- Department of Infectious Diseases, Virology, Heidelberg University, Heidelberg, Germany
- Schaller Research Group at the University of Heidelberg and the DKFZ, Heidelberg, Germany
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
| | - Mirko Cortese
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
| | - Inés Romero-Brey
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
| | - Zach Menne
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
| | - Thibault Tubiana
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris Sud, Université Paris-Saclay, Gif sur Yvette cedex, France
| | - Christian Schenk
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
| | - Peter A. White
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, Australia
| | - Ralf Bartenschlager
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
- German Center for Infection Research (DZIF), Heidelberg University, Heidelberg, Germany
| | - Stéphane Bressanelli
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris Sud, Université Paris-Saclay, Gif sur Yvette cedex, France
| | - Grant S. Hansman
- Department of Infectious Diseases, Virology, Heidelberg University, Heidelberg, Germany
- Schaller Research Group at the University of Heidelberg and the DKFZ, Heidelberg, Germany
| | - Volker Lohmann
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Im Neuenheimer Feld 345, Heidelberg, Germany
- * E-mail:
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29
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Kitamoto T, Takai-Todaka R, Kato A, Kanamori K, Takagi H, Yoshida K, Katayama K, Nakanishi A. Viral Population Changes during Murine Norovirus Propagation in RAW 264.7 Cells. Front Microbiol 2017; 8:1091. [PMID: 28663743 PMCID: PMC5471328 DOI: 10.3389/fmicb.2017.01091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 05/30/2017] [Indexed: 12/23/2022] Open
Abstract
Laboratory adaptation of viruses is an essential technique for basic virology research, including the generation of attenuated vaccine strains, although the principles of cell adaptation remain largely unknown. Deep sequencing of murine norovirus (MuNoV) S7 during serial passages in RAW264.7 cells showed that the frequencies of viral variants were altered more dynamically than previously reported. Serial passages of the virus following two different multiplicity of infections gave rise to distinct haplotypes, implying that multiple cell-adaptable sequences were present in the founder population. Nucleotide variants lost during passage were assembled into a viral genome representative of that prior to cell adaptation, which was unable to generate viral particles upon infection in cultured cells. In addition, presence of the reconstructed genome interfered with production of infectious particles from viruses that were fully adapted to in vitro culture. Although the key nucleotide changes dictating cell adaptation of MuNoV S7 viral infection are yet to be elucidated, our results revealed the elaborate interplay among selected sequences of viral variants better adapted to propagation in cell culture. Such knowledge will be instrumental in understanding the processes necessary for the laboratory adaptation of viruses, especially to those without relevant cell culture systems.
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Affiliation(s)
- Takuya Kitamoto
- Laboratory of Radiation Safety, National Center for Geriatrics and GerontologyObu, Japan
| | - Reiko Takai-Todaka
- Laboratory of Gastroenteritis Viruses, Virology II, National Institute for Infectious DiseasesMusashimurayama, Japan
| | - Akiko Kato
- Laboratory of Radiation Safety, National Center for Geriatrics and GerontologyObu, Japan
| | - Kumiko Kanamori
- Section of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and GerontologyObu, Japan
| | - Hirotaka Takagi
- Division of Biosafety Control and Research, National Institute for Infectious DiseasesTokyo, Japan
| | - Kazuhiro Yoshida
- Section of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and GerontologyObu, Japan
| | - Kazuhiko Katayama
- Laboratory of Gastroenteritis Viruses, Virology II, National Institute for Infectious DiseasesMusashimurayama, Japan.,Laboratory of Viral Infection I, Graduate School of Infection Control Sciences, Kitasato Institute for Life Sciences, Kitasato UniversityTokyo, Japan
| | - Akira Nakanishi
- Laboratory of Radiation Safety, National Center for Geriatrics and GerontologyObu, Japan.,Section of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and GerontologyObu, Japan
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30
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[Discovery of murine norovirus receptor]. Uirusu 2017; 67:111-120. [PMID: 30369535 DOI: 10.2222/jsv.67.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Norovirus is the leading cause of acute gastroenteritis worldwide. Since the discovery of human norovirus (HuNoV), an efficient and reproducible norovirus replication system has not been established in cultured cells. Although limited amounts of virus particles can be produced when the HuNoV genome is directly transfected into cells, the HuNoV cycle of infection has not been successfully reproduced in any currently available cell-culture system. Those results imply that the identification of a functional cell-surface receptor for norovirus might be the key to establishing a norovirus culture system. Using a genome-wide CRISPR/Cas9 guide RNA library, we identified murine CD300lf and CD300ld as functional receptors for murine norovirus (MNV). The treatment of susceptible cells with polyclonal antibody against CD300lf significantly reduced the production of viral progeny. Additionally, ectopic CD300lf expression in nonsusceptible cell lines derived from other animal species enabled MNV infection and progeny production, suggesting that CD300lf has potential for dictating MNV host tropism. Furthermore, CD300ld, which has an amino acid sequence in the N-terminal region of its extracellular domain that is highly homologous to that of CD300lf, also functions as a receptor for MNV. Our results indicate that direct interaction of MNV with two cell-surface molecules, CD300lf and CD300ld, dictates permissive noroviral infection.
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31
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Sánchez G, Sánchez G. Food and Viral Contamination: Analytical Methods. Food Saf (Tokyo) 2016. [DOI: 10.1002/9781119160588.ch10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Qu L, Murakami K, Broughman JR, Lay MK, Guix S, Tenge VR, Atmar RL, Estes MK. Replication of Human Norovirus RNA in Mammalian Cells Reveals Lack of Interferon Response. J Virol 2016; 90:8906-23. [PMID: 27466422 PMCID: PMC5021416 DOI: 10.1128/jvi.01425-16] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 07/18/2016] [Indexed: 12/31/2022] Open
Abstract
UNLABELLED Human noroviruses (HuNoVs), named after the prototype strain Norwalk virus (NV), are a leading cause of acute gastroenteritis outbreaks worldwide. Studies on the related murine norovirus (MNV) have demonstrated the importance of an interferon (IFN) response in host control of virus replication, but this remains unclear for HuNoVs. Despite the lack of an efficient cell culture infection system, transfection of stool-isolated NV RNA into mammalian cells leads to viral RNA replication and virus production. Using this system, we show here that NV RNA replication is sensitive to type I (α/β) and III (interleukin-29 [IL-29]) IFN treatment. However, in cells capable of a strong IFN response to Sendai virus (SeV) and poly(I·C), NV RNA replicates efficiently and generates double-stranded RNA without inducing a detectable IFN response. Replication of HuNoV genogroup GII.3 strain U201 RNA, generated from a reverse genetics system, also does not induce an IFN response. Consistent with a lack of IFN induction, NV RNA replication is enhanced neither by neutralization of type I/III IFNs through neutralizing antibodies or the soluble IFN decoy receptor B18R nor by short hairpin RNA (shRNA) knockdown of mitochondrial antiviral signaling protein (MAVS) or interferon regulatory factor 3 (IRF3) in the IFN induction pathways. In contrast to other positive-strand RNA viruses that block IFN induction by targeting MAVS for degradation, MAVS is not degraded in NV RNA-replicating cells, and an SeV-induced IFN response is not blocked. Together, these results indicate that HuNoV RNA replication in mammalian cells does not induce an IFN response, suggesting that the epithelial IFN response may play a limited role in host restriction of HuNoV replication. IMPORTANCE Human noroviruses (HuNoVs) are a leading cause of epidemic gastroenteritis worldwide. Due to lack of an efficient cell culture system and robust small-animal model, little is known about the innate host defense to these viruses. Studies on murine norovirus (MNV) have shown the importance of an interferon (IFN) response in host control of MNV replication, but this remains unclear for HuNoVs. Here, we investigated the IFN response to HuNoV RNA replication in mammalian cells using Norwalk virus stool RNA transfection, a reverse genetics system, IFN neutralization reagents, and shRNA knockdown methods. Our results show that HuNoV RNA replication in mammalian epithelial cells does not induce an IFN response, nor can it be enhanced by blocking the IFN response. These results suggest a limited role of the epithelial IFN response in host control of HuNoV RNA replication, providing important insights into our understanding of the host defense to HuNoVs that differs from that to MNV.
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Affiliation(s)
- Lin Qu
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Kosuke Murakami
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - James R Broughman
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Margarita K Lay
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Susana Guix
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Victoria R Tenge
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Robert L Atmar
- Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Mary K Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
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33
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Functional receptor molecules CD300lf and CD300ld within the CD300 family enable murine noroviruses to infect cells. Proc Natl Acad Sci U S A 2016; 113:E6248-E6255. [PMID: 27681626 DOI: 10.1073/pnas.1605575113] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Norovirus is the leading cause of acute gastroenteritis worldwide. Since the discovery of human norovirus (HuNoV), an efficient and reproducible norovirus replication system has not been established in cultured cells. Although limited amounts of virus particles can be produced when the HuNoV genome is directly transfected into cells, the HuNoV cycle of infection has not been successfully reproduced in any currently available cell-culture system. Those results imply that the identification of a functional cell-surface receptor for norovirus might be the key to establishing a norovirus culture system. Using a genome-wide CRISPR/Cas9 guide RNA library, we identified murine CD300lf and CD300ld as functional receptors for murine norovirus (MNV). The treatment of susceptible cells with polyclonal antibody against CD300lf significantly reduced the production of viral progeny. Additionally, ectopic CD300lf expression in nonsusceptible cell lines derived from other animal species enabled MNV infection and progeny production, suggesting that CD300lf has potential for dictating MNV host tropism. Furthermore, CD300ld, which has an amino acid sequence in the N-terminal region of its extracellular domain that is highly homologous to that of CD300lf, also functions as a receptor for MNV. Our results indicate that direct interaction of MNV with two cell-surface molecules, CD300lf and CD300ld, dictates permissive noroviral infection.
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34
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Ettayebi K, Crawford SE, Murakami K, Broughman JR, Karandikar U, Tenge VR, Neill FH, Blutt SE, Zeng XL, Qu L, Kou B, Opekun AR, Burrin D, Graham DY, Ramani S, Atmar RL, Estes MK. Replication of human noroviruses in stem cell-derived human enteroids. Science 2016; 353:1387-1393. [PMID: 27562956 DOI: 10.1126/science.aaf5211] [Citation(s) in RCA: 948] [Impact Index Per Article: 118.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 08/18/2016] [Indexed: 12/12/2022]
Abstract
The major barrier to research and development of effective interventions for human noroviruses (HuNoVs) has been the lack of a robust and reproducible in vitro cultivation system. HuNoVs are the leading cause of gastroenteritis worldwide. We report the successful cultivation of multiple HuNoV strains in enterocytes in stem cell-derived, nontransformed human intestinal enteroid monolayer cultures. Bile, a critical factor of the intestinal milieu, is required for strain-dependent HuNoV replication. Lack of appropriate histoblood group antigen expression in intestinal cells restricts virus replication, and infectivity is abrogated by inactivation (e.g., irradiation, heating) and serum neutralization. This culture system recapitulates the human intestinal epithelium, permits human host-pathogen studies of previously noncultivatable pathogens, and allows the assessment of methods to prevent and treat HuNoV infections.
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Affiliation(s)
- Khalil Ettayebi
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Sue E Crawford
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Kosuke Murakami
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - James R Broughman
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Umesh Karandikar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Victoria R Tenge
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Frederick H Neill
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Sarah E Blutt
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Xi-Lei Zeng
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Lin Qu
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Baijun Kou
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Antone R Opekun
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA. Section of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA. USDA/ARS Children's Nutrition Research Center, Houston, TX, USA
| | - Douglas Burrin
- Section of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA. USDA/ARS Children's Nutrition Research Center, Houston, TX, USA
| | - David Y Graham
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA. Department of Medicine, Baylor College of Medicine, Houston, TX, USA. Department of Medicine, Michael E. DeBakey VA Medical Center, Houston, TX, USA
| | - Sasirekha Ramani
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Robert L Atmar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA. Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Mary K Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA. Department of Medicine, Baylor College of Medicine, Houston, TX, USA.
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Karandikar UC, Crawford SE, Ajami NJ, Murakami K, Kou B, Ettayebi K, Papanicolaou GA, Jongwutiwes U, Perales MA, Shia J, Mercer D, Finegold MJ, Vinjé J, Atmar RL, Estes MK. Detection of human norovirus in intestinal biopsies from immunocompromised transplant patients. J Gen Virol 2016; 97:2291-2300. [PMID: 27412790 DOI: 10.1099/jgv.0.000545] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Human noroviruses (HuNoVs) can often cause chronic infections in solid organ and haematopoietic stem cell transplant (HSCT) patients. Based on histopathological changes observed during HuNoV infections, the intestine is the presumed site of virus replication in patients; however, the cell types infected by HuNoVs remain unknown. The objective of this study was to characterize histopathological changes during HuNoV infection and to determine the cell types that may be permissive for HuNoV replication in transplant patients. We analysed biopsies from HuNoV-infected and non-infected (control) transplant patients to assess histopathological changes in conjunction with detection of HuNoV antigens to identify the infected cell types. HuNoV infection in immunocompromised patients was associated with histopathological changes such as disorganization and flattening of the intestinal epithelium. The HuNoV major capsid protein, VP1, was detected in all segments of the small intestine, in areas of biopsies that showed histopathological changes. Specifically, VP1 was detected in enterocytes, macrophages, T cells and dendritic cells. HuNoV replication was investigated by detecting the non-structural proteins, RdRp and VPg. We detected RdRp and VPg along with VP1 in duodenal and jejunal enterocytes. These results provide critical insights into histological changes due to HuNoV infection in immunocompromised patients and propose human enterocytes as a physiologically relevant cell type for HuNoV cultivation.
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Affiliation(s)
- Umesh C Karandikar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Sue E Crawford
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Nadim J Ajami
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Kosuke Murakami
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Baijun Kou
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Khalil Ettayebi
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Genovefa A Papanicolaou
- Infectious Disease and Adult Bone Marrow Transplant Services, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ubonvan Jongwutiwes
- Infectious Disease and Adult Bone Marrow Transplant Services, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Miguel-Angel Perales
- Adult Bone Marrow Transplantation Service, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.,Weill Cornell Medical College, New York, NY , USA
| | - Jinru Shia
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - David Mercer
- Department of Surgery, University for Nebraska Medical Centre, Omaha, NE 68198, USA
| | - Milton J Finegold
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas 77030, USA.,Department of Pathology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Jan Vinjé
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Robert L Atmar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA.,Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Mary K Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas 77030, USA.,Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA
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Mathijs E, Oliveira-Filho EFD, Dal Pozzo F, Mauroy A, Thiry D, Massart F, Saegerman C, Thiry E. Infectivity of a recombinant murine norovirus (RecMNV) in Balb/cByJ mice. Vet Microbiol 2016; 192:118-122. [PMID: 27527773 DOI: 10.1016/j.vetmic.2016.07.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 07/10/2016] [Accepted: 07/11/2016] [Indexed: 11/17/2022]
Abstract
The infectivity of a recombinant murine norovirus (RecMNV) strain, previously isolated following in vitro coinfections, was evaluated in vivo in comparison with its parental strains (MNV-1-CW1 and WU20) in Balb/cByJ mice via measurement of weight loss and estimation of viral loads in faeces, tissues and organs 48 and 72h post-infection. The presence of infectious virus in all analysed tissues and organs suggests that, similarly to its parental viruses, RecMNV can disseminate beyond organs associated with the digestive tract. Our results also suggest that recombination occurring in vitro between two homologous murine norovirus strains can give rise to a chimeric strain which, despite slight differences, shows similar biological properties to its parental strains. This study provides the first report on in vivo replication of a recombinant norovirus strain isolated following in vitro coinfection. These results have great significance for norovirus genetic evolution and future vaccine development.
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Affiliation(s)
- Elisabeth Mathijs
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium; Department of Virology - Molecular Platform, Veterinary & Agrochemical Research Centre, 1180 Brussels, Belgium
| | - Edmilson F de Oliveira-Filho
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium; Department of Virology, Aggeu Magalhães Research Centre, Oswaldo Cruz Foundation (FIOCRUZ), 50670-420 Recife, Brazil
| | - Fabiana Dal Pozzo
- Research Unit of Epidemiology and risk analysis applied to veterinary sciences (UREAR), Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), Faculty of Veterinary Medicine, University of Liège, 4000 Liège, Belgium
| | - Axel Mauroy
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium
| | - Damien Thiry
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium
| | - François Massart
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium
| | - Claude Saegerman
- Research Unit of Epidemiology and risk analysis applied to veterinary sciences (UREAR), Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), Faculty of Veterinary Medicine, University of Liège, 4000 Liège, Belgium
| | - Etienne Thiry
- Veterinary Virology and Animal Viral Diseases, Department of Infectious and Parasitic Diseases, Fundamental and Applied Research for Animals and Health Centre (FARAH), 4000 Liège, Belgium.
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Antiviral targets of human noroviruses. Curr Opin Virol 2016; 18:117-25. [PMID: 27318434 DOI: 10.1016/j.coviro.2016.06.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 06/06/2016] [Accepted: 06/06/2016] [Indexed: 11/20/2022]
Abstract
Human noroviruses are major causative agents of sporadic and epidemic gastroenteritis both in children and adults. Currently there are no licensed therapeutic intervention measures either in terms of vaccines or drugs available for these highly contagious human pathogens. Genetic and antigenic diversity of these viruses, rapid emergence of new strains, and their ability to infect a broad population by using polymorphic histo-blood group antigens for cell attachment, pose significant challenges for the development of effective antiviral agents. Despite these impediments, there is progress in the design and development of therapeutic agents. These include capsid-based candidate vaccines, and potential antivirals either in the form of glycomimetics or designer antibodies that block HBGA binding, as well as those that target essential non-structural proteins such as the viral protease and RNA-dependent RNA polymerase. In addition to these classical approaches, recent studies suggest the possibility of interferons and targeting host cell factors as viable approaches to counter norovirus infection. This review provides a brief overview of this progress.
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Thorne L, Arias A, Goodfellow I. Advances Toward a Norovirus Antiviral: From Classical Inhibitors to Lethal Mutagenesis. J Infect Dis 2016; 213 Suppl 1:S27-31. [PMID: 26744429 PMCID: PMC4704654 DOI: 10.1093/infdis/jiv280] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Human noroviruses are a leading cause of gastroenteritis worldwide, yet there are no licensed antivirals. There is an urgent need for norovirus therapeutics, particularly for chronic infections in immunocompromised individuals, but also a potential need for prophylactic use in epidemics. Continued research has led to the identification of compounds that inhibit norovirus replication in vitro and, at least in some cases, are also effective in vivo against murine norovirus. Progress has included classical approaches targeting viral proteins and harnessing the antiviral action of interferon, strategies targeting essential host cell factors, and novel strategies exploiting the high mutation rate of noroviruses.
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Affiliation(s)
- Lucy Thorne
- Division of Virology, Department of Pathology, University of Cambridge, Addenbrookes Hospital, United Kingdom
| | - Armando Arias
- Division of Virology, Department of Pathology, University of Cambridge, Addenbrookes Hospital, United Kingdom
| | - Ian Goodfellow
- Division of Virology, Department of Pathology, University of Cambridge, Addenbrookes Hospital, United Kingdom
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Parra GI, Sosnovtsev SV, Abente EJ, Sandoval-Jaime C, Bok K, Dolan MA, Green KY. Mapping and modeling of a strain-specific epitope in the Norwalk virus capsid inner shell. Virology 2016; 492:232-41. [PMID: 26971245 PMCID: PMC11036327 DOI: 10.1016/j.virol.2016.02.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 02/12/2016] [Accepted: 02/21/2016] [Indexed: 11/17/2022]
Abstract
Noroviruses are diverse positive-strand RNA viruses associated with acute gastroenteritis. Cross-reactive epitopes have been mapped primarily to conserved sequences in the capsid VP1 Shell (S) domain, and strain-specific epitopes to the highly variable Protruding (P) domain. In this work, we investigated a strain-specific linear epitope defined by MAb NV10 that was raised against prototype (Genogroup I.1) strain Norwalk virus (NV). Using peptide scanning and mutagenesis, the epitope was mapped to amino acids 21-32 (LVPEVNASDPLA) of the NV S domain, and its specificity was verified by epitope transfer and reactivity with a recombinant MAb NV10 single-chain variable fragment (scFv). Comparative structural modeling of the NV10 strain-specific and the broadly cross-reactive TV20 epitopes identified two internal non-overlapping sites in the NV shell, corresponding to variable and conserved amino acid sequences among strains, respectively. The S domain, like the P domain, contains strain-specific epitopes that contribute to the antigenic diversity among the noroviruses.
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Affiliation(s)
- Gabriel I Parra
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Stanislav V Sosnovtsev
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Eugenio J Abente
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Carlos Sandoval-Jaime
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Karin Bok
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Michael A Dolan
- Bioinformatics and Computational Biosciences Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Kim Y Green
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
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Lei S, Samuel H, Twitchell E, Bui T, Ramesh A, Wen K, Weiss M, Li G, Yang X, Jiang X, Yuan L. Enterobacter cloacae inhibits human norovirus infectivity in gnotobiotic pigs. Sci Rep 2016; 6:25017. [PMID: 27113278 PMCID: PMC4845002 DOI: 10.1038/srep25017] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 04/06/2016] [Indexed: 02/06/2023] Open
Abstract
Human noroviruses (HuNoVs) are the leading cause of epidemic gastroenteritis worldwide. Study of HuNoV biology has been hampered by the lack of an efficient cell culture system. Recently, enteric commensal bacteria Enterobacter cloacae has been recognized as a helper in HuNoV infection of B cells in vitro. To test the influences of E. cloacae on HuNoV infectivity and to determine whether HuNoV infects B cells in vivo, we colonized gnotobiotic pigs with E. cloacae and inoculated pigs with 2.74 × 10(4) genome copies of HuNoV. Compared to control pigs, reduced HuNoV shedding was observed in E. cloacae colonized pigs, characterized by significantly shorter duration of shedding in post-inoculation day 10 subgroup and lower cumulative shedding and peak shedding in individual pigs. Colonization of E. cloacae also reduced HuNoV titers in intestinal tissues and in blood. In both control and E. cloacae colonized pigs, HuNoV infection of enterocytes was confirmed, however infection of B cells was not observed in ileum, and the entire lamina propria in sections of duodenum, jejunum, and ileum were HuNoV-negative. In summary, E. cloacae inhibited HuNoV infectivity, and B cells were not a target cell type for HuNoV in gnotobiotic pigs, with or without E. cloacae colonization.
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Affiliation(s)
- Shaohua Lei
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Helen Samuel
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Erica Twitchell
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Tammy Bui
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Ashwin Ramesh
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Ke Wen
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Mariah Weiss
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Guohua Li
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xingdong Yang
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xi Jiang
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Lijuan Yuan
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
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41
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Royall E, Locker N. Translational Control during Calicivirus Infection. Viruses 2016; 8:104. [PMID: 27104553 PMCID: PMC4848598 DOI: 10.3390/v8040104] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/14/2016] [Accepted: 04/15/2016] [Indexed: 12/22/2022] Open
Abstract
In this review, we provide an overview of the strategies developed by caliciviruses to subvert or regulate the host protein synthesis machinery to their advantage. As intracellular obligate parasites, viruses strictly depend on the host cell resources to produce viral proteins. Thus, many viruses have developed strategies that regulate the function of the host protein synthesis machinery, often leading to preferential translation of viral mRNAs. Caliciviruses lack a 5′ cap structure but instead have a virus-encoded VPg protein covalently linked to the 5′ end of their mRNAs. Furthermore, they encode 2–4 open reading frames within their genomic and subgenomic RNAs. Therefore, they use alternative mechanisms for translation whereby VPg interacts with eukaryotic initiation factors (eIFs) to act as a proteinaceous cap-substitute, and some structural proteins are produced by reinitiation of translation events. This review discusses our understanding of these key mechanisms during caliciviruses infection as well as recent insights into the global regulation of eIF4E activity.
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Affiliation(s)
- Elizabeth Royall
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford GU2 7HX, UK.
| | - Nicolas Locker
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford GU2 7HX, UK.
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Cuevas JM, Combe M, Torres-Puente M, Garijo R, Guix S, Buesa J, Rodríguez-Díaz J, Sanjuán R. Human norovirus hyper-mutation revealed by ultra-deep sequencing. INFECTION GENETICS AND EVOLUTION 2016; 41:233-239. [PMID: 27094861 PMCID: PMC7172324 DOI: 10.1016/j.meegid.2016.04.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/11/2016] [Accepted: 04/15/2016] [Indexed: 02/02/2023]
Abstract
Human noroviruses (NoVs) are a major cause of gastroenteritis worldwide. It is thought that, similar to other RNA viruses, high mutation rates allow NoVs to evolve fast and to undergo rapid immune escape at the population level. However, the rate and spectrum of spontaneous mutations of human NoVs have not been quantified previously. Here, we analyzed the intra-patient diversity of the NoV capsid by carrying out RT-PCR and ultra-deep sequencing with 100,000-fold coverage of 16 stool samples from symptomatic patients. This revealed the presence of low-frequency sequences carrying large numbers of U-to-C or A-to-G base transitions, suggesting a role for hyper-mutation in NoV diversity. To more directly test for hyper-mutation, we performed transfection assays in which the production of mutations was restricted to a single cell infection cycle. This confirmed the presence of sequences with multiple U-to-C/A-to-G transitions, and suggested that hyper-mutation contributed a large fraction of the total NoV spontaneous mutation rate. The type of changes produced and their sequence context are compatible with ADAR-mediated editing of the viral RNA. Norovirus U-to-C hyper-mutants are present in patient samples. Analysis of hyper-mutants in cell culture suggests ADAR-mediated RNA edition. Hyper-mutation may contribute to norovirus diversity and evolution.
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Affiliation(s)
- José M Cuevas
- Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Valencia, Spain
| | - Marine Combe
- Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Valencia, Spain
| | - Manoli Torres-Puente
- Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana, Valencia, Spain
| | - Raquel Garijo
- Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Valencia, Spain
| | - Susana Guix
- Departament de Microbiologia, Universitat de Barcelona, Barcelona, Spain
| | - Javier Buesa
- Departament de Microbiologia, Universitat de València, Valencia, Spain
| | | | - Rafael Sanjuán
- Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Valencia, Spain; Departament de Genètica, Universitat de València, Valencia, Spain.
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43
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Infection models of human norovirus: challenges and recent progress. Arch Virol 2016; 161:779-88. [PMID: 26780772 DOI: 10.1007/s00705-016-2748-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 12/30/2015] [Indexed: 10/22/2022]
Abstract
Human norovirus (hNoV) infections cause acute gastroenteritis, accounting for millions of disease cases and more than 200,000 deaths annually. However, the lack of in vitro infection models and robust small-animal models has posed barriers to the development of virus-specific therapies and preventive vaccines. Promising recent progress in the development of a norovirus infection model is reviewed in this article, as well as attempts and efforts made since the discovery of hNoV more than 40 years ago. Because suitable experimental animal models for human norovirus are lacking, attractive alternatives are also discussed.
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Chapellier B, Tange S, Tasaki H, Yoshida K, Zhou Y, Sakon N, Katayama K, Nakanishi A. Examination of a plasmid-based reverse genetics system for human astrovirus. Microbiol Immunol 2015; 59:586-96. [PMID: 26272702 DOI: 10.1111/1348-0421.12317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/26/2015] [Accepted: 08/11/2015] [Indexed: 12/29/2022]
Abstract
A plasmid-based reverse genetics system for human astrovirus type 1 (HAstV1) is examined. Upon transfection into 293T cells, the plasmid vector, which harbors a HAstV1 expression cassette, expressed astroviral RNA that appeared to be capable of viral RNA replication, as indicated by the production of subgenomic RNA and capsid protein expression irrespective of the heterologous 5' ends of the transcribed RNA. Particles infectious to Caco-2 cells were made in this system; however, their infectivity was much lower than would be expected from the amount of particles apparently produced. Using Huh-7 cells as the transfection host with the aim of improving viral capsid processing for virion maturation partially restored the efficiency of infectious particle formation. Our results support the possibility that the DNA transfection process induces a cellular response that targets late, but not early, stages of HAstV1 infection.
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Affiliation(s)
- Benoit Chapellier
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
| | - Shoichiro Tange
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
| | - Hidetaka Tasaki
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
| | - Kazuhiro Yoshida
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
| | - Yan Zhou
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
| | - Naomi Sakon
- Osaka Prefectural Institute of Public Health, Osaka, Osaka, 537-0025
| | - Kazuhiko Katayama
- National Institute for Infectious Diseases, Department of Virology 2, Laboratory of Gastroenteritis Viruses, Musashi-Murayama, Tokyo, 208-0011, Japan
| | - Akira Nakanishi
- Laboratory of Gene Therapy, Department of Aging Intervention, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8522
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Huo Y, Wan X, Ling T, Wu J, Wang Z, Meng S, Shen S. Prevailing Sydney like Norovirus GII.4 VLPs induce systemic and mucosal immune responses in mice. Mol Immunol 2015; 68:367-72. [PMID: 26375574 DOI: 10.1016/j.molimm.2015.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/29/2015] [Accepted: 09/05/2015] [Indexed: 02/08/2023]
Abstract
The newly emerged Norovirus (NoV) Sydney 2012 strain has been sweeping all over the world, causing acute non-bacterial gastroenteritis in adults and children. Due to a lack of cell culture system, virus like particles (VLPs) has been assembled and used as vaccine candidates in preclinical and clinical studies. Expression of the major capsid protein of NoVs using recombinant baculovirus expression system in Sf9 cells leads to formation of VLPs that are morphologically and antigenically similar to true virions. In this study, VLPs were successfully produced using the VP1 of Sydney-2012-like strain and its immunogenicity was evaluated by different routes and its capability in inducing mucosal immune responses in the presence and absence of adjuvants in BALB/c mice. Administration of NoV VLPs in the presence of Al(OH)3 or monophosphoryl lipid A (MPL-A) led to high titers of VLP-specific IgG antibodies. Administration of VLPs orally in the presence of cholera toxin subunit B (CTB) didn't enhance mucosal immune response as less fecal IgA positive mice were observed when compared with those given VLPs only. Our study represents the first immunogenicity study of VLPs derived from current pandemic Sydney 2012 strain and which might have implications in the development of NoVs vaccine in china.
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Affiliation(s)
- Yuqi Huo
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China.
| | - Xin Wan
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China
| | - Tong Ling
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China
| | - Jie Wu
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China
| | - Zejun Wang
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China
| | - Shengli Meng
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China
| | - Shuo Shen
- Wuhan Institute of Biological Products Co., Ltd., Wuhan, PR China.
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Drouaz N, Schaeffer J, Farkas T, Le Pendu J, Le Guyader FS. Tulane Virus as a Potential Surrogate To Mimic Norovirus Behavior in Oysters. Appl Environ Microbiol 2015; 81:5249-56. [PMID: 26025893 PMCID: PMC4495214 DOI: 10.1128/aem.01067-15] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 05/20/2015] [Indexed: 01/08/2023] Open
Abstract
Oyster contamination by noroviruses is an important health and economic problem. The present study aimed to compare the behaviors of Norwalk virus (the prototype genogroup I norovirus) and two culturable viruses: Tulane virus and mengovirus. After bioaccumulation, tissue distributions were quite similar for Norwalk virus and Tulane virus, with the majority of viral particles detected in digestive tissues, while mengovirus was detected in large amounts in the gills and mantle as well as in digestive tissues. The levels of persistence of all three viruses over 8 days were comparable, but clear differences were observed over longer periods, with Norwalk and Tulane viruses displaying rather similar half-lives, unlike mengovirus, which was cleared more rapidly. These results indicate that Tulane virus may be a good surrogate for studying norovirus behavior in oysters, and they confirm the prolonged persistence of Norwalk virus in oyster tissues.
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Affiliation(s)
- Najoua Drouaz
- IFREMER, Laboratoire de Microbiologie, LSEM-SG2M, Nantes, France
| | - Julien Schaeffer
- IFREMER, Laboratoire de Microbiologie, LSEM-SG2M, Nantes, France
| | - Tibor Farkas
- Laboratory of Specialized Clinical Studies, Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jacques Le Pendu
- INSERM, U892, CNRS, UMR6299, Université de Nantes, Nantes, France
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Karim MR, Fout GS, Johnson CH, White KM, Parshionikar SU. Propidium monoazide reverse transcriptase PCR and RT-qPCR for detecting infectious enterovirus and norovirus. J Virol Methods 2015; 219:51-61. [DOI: 10.1016/j.jviromet.2015.02.020] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 01/09/2015] [Accepted: 02/11/2015] [Indexed: 02/02/2023]
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Liu W, Chen Y, Jiang X, Xia M, Yang Y, Tan M, Li X, Rao Z. A Unique Human Norovirus Lineage with a Distinct HBGA Binding Interface. PLoS Pathog 2015; 11:e1005025. [PMID: 26147716 PMCID: PMC4493018 DOI: 10.1371/journal.ppat.1005025] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 06/16/2015] [Indexed: 01/04/2023] Open
Abstract
Norovirus (NoV) causes epidemic acute gastroenteritis in humans, whereby histo-blood group antigens (HBGAs) play an important role in host susceptibility. Each of the two major genogroups (GI and GII) of human NoVs recognizes a unique set of HBGAs through a distinct binding interface that is conserved within a genogroup, indicating a distinct evolutionary path for each genogroup. Here, we characterize a Lewis a (Lea) antigen binding strain (OIF virus) in the GII.21 genotype that does not share the conserved GII binding interface, revealing a new evolution lineage with a distinct HBGA binding interface. Sequence alignment showed that the major residues contributing to the new HBGA binding interface are conserved among most members of the GII.21, as well as a closely related GII.13 genotype. In addition, we found that glycerol inhibits OIF binding to HBGAs, potentially allowing production of cheap antivirals against human NoVs. Taken together, our results reveal a new evolutionary lineage of NoVs selected by HBGAs, a finding that is important for understanding the diversity and widespread nature of NoVs.
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Affiliation(s)
- Wu Liu
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Yutao Chen
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Xi Jiang
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio United States of America
- University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Ming Xia
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio United States of America
| | - Yang Yang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Ming Tan
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio United States of America
- University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Xuemei Li
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Zihe Rao
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
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Abstract
Since 1996, there have been at least six human norovirus pandemics. All of the pandemic strains are genetically related, segregating in the genogroup II, genotype 4 (GII.4) cluster within the Norovirus genus. Evidence indicates that these strains are closely related but antigenically distinct, supporting immune-driven viral evolution. Thus, norovirus vaccines will likely require periodic reformulation to protect from newly emergent strains. A major obstacle is that the reservoir of emergent strains is unknown. Noroviruses display tight species specificity and there is no evidence supporting zoonotic transmission, so an animal reservoir is considered unlikely. Moreover, available data indicate minimal viral diversity in most natural human infections. In this Gem, we discuss the widely speculated idea that chronically infected immunocompromised individuals are norovirus reservoirs and provide a rationale for the theory that elderly and malnourished hosts may also represent norovirus reservoirs.
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50
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Sandoval-Jaime C, Green KY, Sosnovtsev SV. Recovery of murine norovirus and feline calicivirus from plasmids encoding EMCV IRES in stable cell lines expressing T7 polymerase. J Virol Methods 2015; 217:1-7. [PMID: 25698463 DOI: 10.1016/j.jviromet.2015.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 12/11/2014] [Accepted: 02/05/2015] [Indexed: 10/24/2022]
Abstract
Reverse genetics systems constitute one of the most important and powerful tools to study the molecular biology of viruses. We developed a new strategy for the recovery of murine norovirus from a single plasmid in which a bacteriophage T7 RNA polymerase (T7pol) promoter for transcription and an EMCV IRES for efficient translation were engineered immediately upstream of the viral genome. Infectious noroviruses were recovered following transfection of the newly designed plasmid into nonpermissive BHK-21 and HEK293T cell lines that were engineered to express T7pol constitutively. Recovery of the virus did not require the presence of a ribozyme at the 3'-end of the virus genome. The strategy worked also for the efficient recovery of feline calicivirus in these normally nonpermissive cell types. This simplified reverse genetics approach may be broadly applicable to other caliciviruses.
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Affiliation(s)
- Carlos Sandoval-Jaime
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, DHHS, Bethesda, MD, USA
| | - Kim Y Green
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, DHHS, Bethesda, MD, USA
| | - Stanislav V Sosnovtsev
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, DHHS, Bethesda, MD, USA.
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