1
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Lembo A, Molinaro A, De Castro C, Berti F, Biagini M. Impact of glycosylation on viral vaccines. Carbohydr Polym 2024; 342:122402. [PMID: 39048237 DOI: 10.1016/j.carbpol.2024.122402] [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: 02/26/2024] [Revised: 05/24/2024] [Accepted: 06/11/2024] [Indexed: 07/27/2024]
Abstract
Glycosylation is the most prominent modification important for vaccines and its specific pattern depends on several factors that need to be considered when developing a new biopharmaceutical. Tailor-made glycosylation can be exploited to develop more effective and safer vaccines; for this reason, a deep understanding of both glycoengineering strategies and glycans structures and functions is required. In this review we discuss the recent advances concerning glycoprotein expression systems and the explanation of glycans immunomodulation mechanisms. Furthermore, we highlight how glycans tune the immunological properties among different vaccines platforms (whole virus, recombinant protein, nucleic acid), also comparing commercially available formulations and describing the state-of-the-art analytical technologies for glycosylation analysis. The whole review stresses the aspect of glycoprotein glycans as a potential tool to overcome nowadays medical needs in vaccine field.
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Affiliation(s)
- Antonio Lembo
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy; GSK, Siena, Italy
| | - Antonio Molinaro
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Cristina De Castro
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.
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2
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Harada M, Matsuu A, Park ES, Inoue Y, Uda A, Kaku Y, Okutani A, Posadas-Herrera G, Ishijima K, Inoue S, Maeda K. Construction of Vero cell-adapted rabies vaccine strain by five amino acid substitutions in HEP-Flury strain. Sci Rep 2024; 14:12559. [PMID: 38822013 PMCID: PMC11143356 DOI: 10.1038/s41598-024-63337-9] [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: 01/13/2024] [Accepted: 05/28/2024] [Indexed: 06/02/2024] Open
Abstract
Rabies virus (RABV) causes fatal neurological disease. Pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP) using inactivated-virus vaccines are the most effective measures to prevent rabies. In Japan, HEP-Flury, the viral strain, used as a human rabies vaccine, has historically been propagated in primary fibroblast cells derived from chicken embryos. In the present study, to reduce the cost and labor of vaccine production, we sought to adapt the original HEP-Flury (HEP) to Vero cells. HEP was repeatedly passaged in Vero cells to generate ten- (HEP-10V) and thirty-passaged (HEP-30V) strains. Both HEP-10V and HEP-30V grew significantly better than HEP in Vero cells, with virulence and antigenicity similar to HEP. Comparison of the complete genomes with HEP revealed three non-synonymous mutations in HEP-10V and four additional non-synonymous mutations in HEP-30V. Comparison among 18 recombinant HEP strains constructed by reverse genetics and vesicular stomatitis viruses pseudotyped with RABV glycoproteins indicated that the substitution P(L115H) in the phosphoprotein and G(S15R) in the glycoprotein improved viral propagation in HEP-10V, while in HEP-30V, G(V164E), G(L183P), and G(A286V) in the glycoprotein enhanced entry into Vero cells. The obtained recombinant RABV strain, rHEP-PG4 strain, with these five substitutions, is a strong candidate for production of human rabies vaccine.
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Affiliation(s)
- Michiko Harada
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Aya Matsuu
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Eun-Sil Park
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Yusuke Inoue
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Akihiko Uda
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Yoshihiro Kaku
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Akiko Okutani
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Guillermo Posadas-Herrera
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Keita Ishijima
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Satoshi Inoue
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Ken Maeda
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan.
- Department of Veterinary Science, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
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3
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Almasoud I, Charlton FW, Finke S, Barr JN, Mankouri J. Internalization of rabies virus glycoprotein differs between pathogenic and attenuated virus strains. J Gen Virol 2023; 104:001935. [PMID: 38063294 PMCID: PMC10770930 DOI: 10.1099/jgv.0.001935] [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: 08/08/2023] [Accepted: 11/24/2023] [Indexed: 12/18/2023] Open
Abstract
The zoonotic rabies virus (RABV) is a non-segmented negative-sense RNA virus classified within the family Rhabdoviridae, and is the most common aetiological agent responsible for fatal rabies disease. The RABV glycoprotein (G) forms trimeric spikes that protrude from RABV virions and mediate virus attachment, entry and spread, and is a major determinant of RABV pathogenesis. A range of RABV strains exist that are highly pathogenic in part due to their ability to evade host immune detection. However, some strains are disease-attenuated and can be cleared by host defences. A detailed molecular understanding of how strain variation relates to pathogenesis is currently lacking. Here, we reveal key differences in the trafficking profiles of RABV-G proteins from the challenge virus standard strain (CVS-11) and a highly attenuated vaccine strain SAD-B19 (SAD). We show that CVS-G traffics to the cell surface and undergoes rapid internalization through both clathrin- and cholesterol-dependent endocytic pathways. In contrast, SAD-G remains resident at the plasma membrane and internalizes at a significantly slower rate. Through engineering hybrids of CVS-G and SAD-G, we show that the cytoplasmic tail of CVS-G is the key determinant of these different internalization profiles. Alanine scanning further revealed that mutation of Y497 in CVS-G (H497 in SAD-G) could reduce the rate of internalization to SAD-G levels. Together, these data reveal new phenotypic differences between CVS-G and SAD-G proteins that may contribute to altered in vivo pathogenicity.
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Affiliation(s)
- Ibrahim Almasoud
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
- Present address: Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
| | - Frank W. Charlton
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Stefan Finke
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - John N. Barr
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Jamel Mankouri
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
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Askri H, Akrouti I, Rourou S, Kallèl H. Production, purification, and characterization of recombinant rabies virus glycoprotein expressed in PichiaPink™ yeast. BIOTECHNOLOGY REPORTS 2022; 35:e00736. [PMID: 35646619 PMCID: PMC9130087 DOI: 10.1016/j.btre.2022.e00736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 05/08/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022]
Abstract
The rabies virus glycoprotein was produced in the Pichia pastoris production strains PichiaPink™ . Different carbon sources were found able to support the RABV-G expression under the control of the constitutive GAP promoter. Culture parameters such as oxygen supply, pH or growth rate can affect the yield and the quality of the produced RABV-G. The purified RABV-G was found correctly glycosylated and able to mediate trimeric oligomerization.
The commonly used host for industrial production of recombinant proteins Pichia pastoris, has been used in this work to produce the rabies virus glycoprotein (RABV-G). To allow a constitutive expression and the secretion of the expressed recombinant RABV-G, the PichiaPink™ commercialized expression vectors were modified to contain the constitutive GAP promoter and the α secretion signal sequences. Recombinant PichiaPink™ strains co-expressing the RABV-G and the protein chaperone PDI, have been then generated and screened for the best producer clone. The influence of seven carbon sources on the expression of the RABV-G, has been studied under different culture conditions in shake flask culture. An incubation temperature of 30°C under an agitation rate of 250 rpm in a filling volume of 10:1 flask/culture volume ratio were the optimal conditions for the RABV-G production in shake flask for all screened carbon sources. A bioreactor Fed batch culture has been then carried using glycerol and glucose as they were good carbon sources for cell growth and RABV-G production in shake flask scale. Cells were grown on glycerol during the batch phase then fed with glycerol or glucose defined solutions, a final RABV-G concentration of 2.7 µg/l was obtained with a specific product yield (YP/X) of 0.032 and 0.06 µg/g(DCW) respectively. The use of semi-defined feeding solution enhanced the production and the YP/X to 12.9 µg/l and 0.135 µg/g(DCW) respectively. However, the high cell density favored by these carbon sources resulted in oxygen limitation which influenced the glycosylation pattern of the secreted RABV-G. Alternatively, the use of sucrose as substrate for RABV-G production in large scale culture, resulted in less biomass production and a YP/X of 0.310 µg/g(DCW) was obtained. A cation exchange chromatography was then used for RABV-G purification as one step method. The purified protein was correctly folded and glycosylated and able to adopt trimeric conformation. The knowledges gained through this work offer a valuable insight into the bioprocess design of RABV-G production in Pichia pastoris to obtain a correctly folded protein which can be used during an immunization proposal for subunit Rabies vaccine development.
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Feng T, Zhang J, Chen Z, Pan W, Chen Z, Yan Y, Dai J. Glycosylation of viral proteins: Implication in virus-host interaction and virulence. Virulence 2022; 13:670-683. [PMID: 35436420 PMCID: PMC9037552 DOI: 10.1080/21505594.2022.2060464] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Glycans are among the most important cell molecular components. However, given their structural diversity, their functions have not been fully explored. Glycosylation is a vital post-translational modification for various proteins. Many bacteria and viruses rely on N-linked and O-linked glycosylation to perform critical biological functions. The diverse functions of glycosylation on viral proteins during viral infections, including Dengue, Zika, influenza, and human immunodeficiency viruses as well as coronaviruses have been reported. N-linked glycosylation is the most common form of protein modification, and it modulates folding, transportation and receptor binding. Compared to N-linked glycosylation, the functions of O-linked viral protein glycosylation have not been comprehensively evaluated. In this review, we summarize findings on viral protein glycosylation, with particular attention to studies on N-linked glycosylation in viral life cycles. This review informs the development of virus-specific vaccines or inhibitors.
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Affiliation(s)
- Tingting Feng
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Jinyu Zhang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Zhiqian Chen
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Wen Pan
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Zhengrong Chen
- Department of Respiratory Medicine, Children's Hospital of Soochow University, Soochow University, Suzhou, China
| | - Yongdong Yan
- Department of Respiratory Medicine, Children's Hospital of Soochow University, Soochow University, Suzhou, China
| | - Jianfeng Dai
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
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Nitschel S, Zaeck LM, Potratz M, Nolden T, te Kamp V, Franzke K, Höper D, Pfaff F, Finke S. Point Mutations in the Glycoprotein Ectodomain of Field Rabies Viruses Mediate Cell Culture Adaptation through Improved Virus Release in a Host Cell Dependent and Independent Manner. Viruses 2021; 13:v13101989. [PMID: 34696419 PMCID: PMC8538267 DOI: 10.3390/v13101989] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/21/2021] [Accepted: 09/29/2021] [Indexed: 11/29/2022] Open
Abstract
Molecular details of field rabies virus (RABV) adaptation to cell culture replication are insufficiently understood. A better understanding of adaptation may not only reveal requirements for efficient RABV replication in cell lines, but may also provide novel insights into RABV biology and adaptation-related loss of virulence and pathogenicity. Using two recombinant field rabies virus clones (rRABV Dog and rRABV Fox), we performed virus passages in three different cell lines to identify cell culture adaptive mutations. Ten passages were sufficient for the acquisition of adaptive mutations in the glycoprotein G and in the C-terminus of phosphoprotein P. Apart from the insertion of a glycosylation sequon via the mutation D247N in either virus, both acquired additional and cell line-specific mutations after passages on BHK (K425N) and MDCK-II (R346S or R350G) cells. As determined by virus replication kinetics, complementation, and immunofluorescence analysis, the major bottleneck in cell culture replication was the intracellular accumulation of field virus G protein, which was overcome after the acquisition of the adaptive mutations. Our data indicate that limited release of extracellular infectious virus at the plasma membrane is a defined characteristic of highly virulent field rabies viruses and we hypothesize that the observed suboptimal release of infectious virions is due to the inverse correlation of virus release and virulence in vivo.
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Affiliation(s)
- Sabine Nitschel
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
| | - Luca M. Zaeck
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
| | - Madlin Potratz
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
| | - Tobias Nolden
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
| | - Verena te Kamp
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
| | - Kati Franzke
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Infectiology (IMED), 17493 Greifswald-Insel Riems, Germany;
| | - Dirk Höper
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Diagnostic Virology (IVD), 17493 Greifswald-Insel Riems, Germany; (D.H.); (F.P.)
| | - Florian Pfaff
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Diagnostic Virology (IVD), 17493 Greifswald-Insel Riems, Germany; (D.H.); (F.P.)
| | - Stefan Finke
- Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology (IMVZ), 17493 Greifswald-Insel Riems, Germany; (S.N.); (L.M.Z.); (M.P.); (T.N.); (V.t.K.)
- Correspondence: ; Tel.: +49-38351-71283
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Li Y, Liu D, Wang Y, Su W, Liu G, Dong W. The Importance of Glycans of Viral and Host Proteins in Enveloped Virus Infection. Front Immunol 2021; 12:638573. [PMID: 33995356 PMCID: PMC8116741 DOI: 10.3389/fimmu.2021.638573] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 04/15/2021] [Indexed: 12/15/2022] Open
Abstract
Animal viruses are parasites of animal cells that have characteristics such as heredity and replication. Viruses can be divided into non-enveloped and enveloped viruses if a lipid bilayer membrane surrounds them or not. All the membrane proteins of enveloped viruses that function in attachment to target cells or membrane fusion are modified by glycosylation. Glycosylation is one of the most common post-translational modifications of proteins and plays an important role in many biological behaviors, such as protein folding and stabilization, virus attachment to target cell receptors and inhibition of antibody neutralization. Glycans of the host receptors can also regulate the attachment of the viruses and then influence the virus entry. With the development of glycosylation research technology, the research and development of novel virus vaccines and antiviral drugs based on glycan have received increasing attention. Here, we review the effects of host glycans and viral proteins on biological behaviors of viruses, and the opportunities for prevention and treatment of viral infectious diseases.
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Affiliation(s)
- Yuqing Li
- Department of Biochemistry and Molecular Biology, Institute of Glycobiology, Dalian Medical University, Dalian, China
| | - Dongqi Liu
- The Queen's University of Belfast Joint College, China Medical University, Shenyang, China
| | - Yating Wang
- Department of Biochemistry and Molecular Biology, Institute of Glycobiology, Dalian Medical University, Dalian, China
| | - Wenquan Su
- Dalian Medical University, Dalian, China
| | - Gang Liu
- Department of Biochemistry and Molecular Biology, Institute of Glycobiology, Dalian Medical University, Dalian, China
| | - Weijie Dong
- Department of Biochemistry and Molecular Biology, Institute of Glycobiology, Dalian Medical University, Dalian, China
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Villa TG, Abril AG, Sánchez S, de Miguel T, Sánchez-Pérez A. Animal and human RNA viruses: genetic variability and ability to overcome vaccines. Arch Microbiol 2020; 203:443-464. [PMID: 32989475 PMCID: PMC7521576 DOI: 10.1007/s00203-020-02040-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/29/2020] [Accepted: 09/12/2020] [Indexed: 02/06/2023]
Abstract
RNA viruses, in general, exhibit high mutation rates; this is mainly due to the low fidelity displayed by the RNA-dependent polymerases required for their replication that lack the proofreading machinery to correct misincorporated nucleotides and produce high mutation rates. This lack of replication fidelity, together with the fact that RNA viruses can undergo spontaneous mutations, results in genetic variants displaying different viral morphogenesis, as well as variation on their surface glycoproteins that affect viral antigenicity. This diverse viral population, routinely containing a variety of mutants, is known as a viral ‘quasispecies’. The mutability of their virions allows for fast evolution of RNA viruses that develop antiviral resistance and overcome vaccines much more rapidly than DNA viruses. This also translates into the fact that pathogenic RNA viruses, that cause many diseases and deaths in humans, represent the major viral group involved in zoonotic disease transmission, and are responsible for worldwide pandemics.
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Affiliation(s)
- T G Villa
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain.
| | - Ana G Abril
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - S Sánchez
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - T de Miguel
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - A Sánchez-Pérez
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, NSW, 2006, Australia
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Takahashi T, Inukai M, Sasaki M, Potratz M, Jarusombuti S, Fujii Y, Nishiyama S, Finke S, Yamada K, Sakai H, Sawa H, Nishizono A, Sugiyama M, Ito N. Genetic and Phenotypic Characterization of a Rabies Virus Strain Isolated from a Dog in Tokyo, Japan in the 1940s. Viruses 2020; 12:v12090914. [PMID: 32825306 PMCID: PMC7552007 DOI: 10.3390/v12090914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/24/2022] Open
Abstract
The rabies virus strain Komatsugawa (Koma), which was isolated from a dog in Tokyo in the 1940s before eradication of rabies in Japan in 1957, is known as the only existent Japanese field strain (street strain). Although this strain potentially provides a useful model to study rabies pathogenesis, little is known about its genetic and phenotypic properties. Notably, this strain underwent serial passages in rodents after isolation, indicating the possibility that it may have lost biological characteristics as a street strain. In this study, to evaluate the utility of the Koma strain for studying rabies pathogenesis, we examined the genetic properties and in vitro and in vivo phenotypes. Genome-wide genetic analyses showed that, consistent with previous findings from partial sequence analyses, the Koma strain is closely related to a Russian street strain within the Arctic-related phylogenetic clade. Phenotypic examinations in vitro revealed that the Koma strain and the representative street strains are less neurotropic than the laboratory strains. Examination by using a mouse model demonstrated that the Koma strain and the street strains are more neuroinvasive than the laboratory strains. These findings indicate that the Koma strain retains phenotypes similar to those of street strains, and is therefore useful for studying rabies pathogenesis.
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Affiliation(s)
- Tatsuki Takahashi
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan; (T.T.); (H.S.); (M.S.)
| | - Maho Inukai
- Laboratory of Zoonotic Disease, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan; (M.I.); (S.N.)
| | - Michihito Sasaki
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan; (M.S.); (H.S.)
| | - Madlin Potratz
- Institute of Molecular Virology and Cell Biology, Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, 17493 Greifswald, Germany; (M.P.); (S.F.)
| | - Supasiri Jarusombuti
- Graduate School of Bioagricultural Science, Nagoya University, Nagoya 464-8601, Japan;
| | - Yuji Fujii
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan;
| | - Shoko Nishiyama
- Laboratory of Zoonotic Disease, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan; (M.I.); (S.N.)
| | - Stefan Finke
- Institute of Molecular Virology and Cell Biology, Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, 17493 Greifswald, Germany; (M.P.); (S.F.)
| | - Kentaro Yamada
- Department of Microbiology, Faculty of Medicine, Oita University, Oita 879-5593, Japan; (K.Y.); (A.N.)
| | - Hiroki Sakai
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan; (T.T.); (H.S.); (M.S.)
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan;
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
- Gifu Center for Highly Advanced Integration of Nanosciences and Life Sciences, Gifu University, Gifu 501-1193, Japan
| | - Hirofumi Sawa
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan; (M.S.); (H.S.)
| | - Akira Nishizono
- Department of Microbiology, Faculty of Medicine, Oita University, Oita 879-5593, Japan; (K.Y.); (A.N.)
| | - Makoto Sugiyama
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan; (T.T.); (H.S.); (M.S.)
- Laboratory of Zoonotic Disease, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan; (M.I.); (S.N.)
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan;
| | - Naoto Ito
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan; (T.T.); (H.S.); (M.S.)
- Laboratory of Zoonotic Disease, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan; (M.I.); (S.N.)
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan;
- Gifu Center for Highly Advanced Integration of Nanosciences and Life Sciences, Gifu University, Gifu 501-1193, Japan
- Correspondence: ; Tel.: +81-58-293-2949
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10
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Luo J, Zhang B, Wu Y, Guo X. Amino Acid Mutation in Position 349 of Glycoprotein Affect the Pathogenicity of Rabies Virus. Front Microbiol 2020; 11:481. [PMID: 32308648 PMCID: PMC7145897 DOI: 10.3389/fmicb.2020.00481] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/05/2020] [Indexed: 12/25/2022] Open
Abstract
Rabies, caused by rabies virus (RABV), is a zoonotic disease infecting mammals including humans. Studies have confirmed that glycoprotein (G) is most related to RABV pathogenicity. In the present study, to discover more amino acid sites related to viral pathogenicity, artificial mutants have been constructed in G of virulent strain GD-SH-01 backbone. Results showed that pathogenicity of GD-SH-01 significantly decreased when Gly349 was replaced by Glu349 through in vivo assays. Gly349→Glu349 of G did not significantly influence viral growth and spread in NA cells. Gly349→Glu349 of G increased the immunogenicity of GD-SH-01 in periphery and induced more expression of interferon alpha (IFN-α) in the brain in mice. It was observed that Gly349→Glu349 of G led to enhanced blood–brain barrier (BBB) permeability at day 5 postinfection. All together, these data revealed that Gly349→Glu349 of G mutation decreased RABV pathogenicity through enhanced immune response and increased BBB permeability. This study provides a new referenced site G349 that could attenuate pathogenicity of RABV.
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Affiliation(s)
- Jun Luo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Boyue Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yuting Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Xiaofeng Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
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11
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Ortega V, Stone JA, Contreras EM, Iorio RM, Aguilar HC. Addicted to sugar: roles of glycans in the order Mononegavirales. Glycobiology 2019; 29:2-21. [PMID: 29878112 PMCID: PMC6291800 DOI: 10.1093/glycob/cwy053] [Citation(s) in RCA: 13] [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: 02/27/2018] [Revised: 04/29/2018] [Accepted: 06/05/2018] [Indexed: 12/25/2022] Open
Abstract
Glycosylation is a biologically important protein modification process by which a carbohydrate chain is enzymatically added to a protein at a specific amino acid residue. This process plays roles in many cellular functions, including intracellular trafficking, cell-cell signaling, protein folding and receptor binding. While glycosylation is a common host cell process, it is utilized by many pathogens as well. Protein glycosylation is widely employed by viruses for both host invasion and evasion of host immune responses. Thus better understanding of viral glycosylation functions has potential applications for improved antiviral therapeutic and vaccine development. Here, we summarize our current knowledge on the broad biological functions of glycans for the Mononegavirales, an order of enveloped negative-sense single-stranded RNA viruses of high medical importance that includes Ebola, rabies, measles and Nipah viruses. We discuss glycobiological findings by genera in alphabetical order within each of eight Mononegavirales families, namely, the bornaviruses, filoviruses, mymonaviruses, nyamiviruses, paramyxoviruses, pneumoviruses, rhabdoviruses and sunviruses.
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Affiliation(s)
- Victoria Ortega
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Jacquelyn A Stone
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, USA
| | - Erik M Contreras
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Ronald M Iorio
- Department of Microbiology and Physiological Systems and Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Hector C Aguilar
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
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12
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Singh R, Singh KP, Cherian S, Saminathan M, Kapoor S, Manjunatha Reddy GB, Panda S, Dhama K. Rabies - epidemiology, pathogenesis, public health concerns and advances in diagnosis and control: a comprehensive review. Vet Q 2017. [PMID: 28643547 DOI: 10.1080/01652176.2017.1343516] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Rabies is a zoonotic, fatal and progressive neurological infection caused by rabies virus of the genus Lyssavirus and family Rhabdoviridae. It affects all warm-blooded animals and the disease is prevalent throughout the world and endemic in many countries except in Islands like Australia and Antarctica. Over 60,000 peoples die every year due to rabies, while approximately 15 million people receive rabies post-exposure prophylaxis (PEP) annually. Bite of rabid animals and saliva of infected host are mainly responsible for transmission and wildlife like raccoons, skunks, bats and foxes are main reservoirs for rabies. The incubation period is highly variable from 2 weeks to 6 years (avg. 2-3 months). Though severe neurologic signs and fatal outcome, neuropathological lesions are relatively mild. Rabies virus exploits various mechanisms to evade the host immune responses. Being a major zoonosis, precise and rapid diagnosis is important for early treatment and effective prevention and control measures. Traditional rapid Seller's staining and histopathological methods are still in use for diagnosis of rabies. Direct immunofluoroscent test (dFAT) is gold standard test and most commonly recommended for diagnosis of rabies in fresh brain tissues of dogs by both OIE and WHO. Mouse inoculation test (MIT) and polymerase chain reaction (PCR) are superior and used for routine diagnosis. Vaccination with live attenuated or inactivated viruses, DNA and recombinant vaccines can be done in endemic areas. This review describes in detail about epidemiology, transmission, pathogenesis, advances in diagnosis, vaccination and therapeutic approaches along with appropriate prevention and control strategies.
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Affiliation(s)
- Rajendra Singh
- a Division of Pathology , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
| | - Karam Pal Singh
- b Centre for Animal Disease Research and Diagnosis (CADRAD) , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
| | - Susan Cherian
- a Division of Pathology , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
| | - Mani Saminathan
- a Division of Pathology , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
| | - Sanjay Kapoor
- c Department of Veterinary Microbiology , LLR University of Veterinary and Animal Sciences , Hisar , Haryana , India
| | - G B Manjunatha Reddy
- d ICAR-National Institute of Veterinary Epidemiology and Disease Informatics , Bengaluru , Karnataka , India
| | - Shibani Panda
- a Division of Pathology , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
| | - Kuldeep Dhama
- a Division of Pathology , ICAR-Indian Veterinary Research Institute , Bareilly , Uttar Pradesh , India
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The phenotype of the RABV glycoprotein determines cellular and global virus load in the brain and is decisive for the pace of the disease. Virology 2017; 511:82-94. [DOI: 10.1016/j.virol.2017.08.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/21/2017] [Accepted: 08/14/2017] [Indexed: 11/18/2022]
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14
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Piccinotti S, Whelan SPJ. Rabies Internalizes into Primary Peripheral Neurons via Clathrin Coated Pits and Requires Fusion at the Cell Body. PLoS Pathog 2016; 12:e1005753. [PMID: 27463226 PMCID: PMC4963122 DOI: 10.1371/journal.ppat.1005753] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 06/17/2016] [Indexed: 12/21/2022] Open
Abstract
The single glycoprotein (G) of rabies virus (RABV) dictates all viral entry steps from receptor engagement to membrane fusion. To study the uptake of RABV into primary neuronal cells in culture, we generated a recombinant vesicular stomatitis virus in which the G protein was replaced with that of the neurotropic RABV CVS-11 strain (rVSV CVS G). Using microfluidic compartmentalized culture, we examined the uptake of single virions into the termini of primary neurons of the dorsal root ganglion and ventral spinal cord. By pharmacologically disrupting endocytosis at the distal neurites, we demonstrate that rVSV CVS G uptake and infection are dependent on dynamin. Imaging of single virion uptake with fluorescent endocytic markers further identifies endocytosis via clathrin-coated pits as the predominant internalization mechanism. Transmission electron micrographs also reveal the presence of viral particles in vesicular structures consistent with incompletely coated clathrin pits. This work extends our previous findings of clathrin-mediated uptake of RABV into epithelial cells to two neuronal subtypes involved in rabies infection in vivo. Chemical perturbation of endosomal acidification in the neurite or somal compartment further shows that establishment of infection requires pH-dependent fusion of virions at the cell body. These findings correlate infectivity to existing single particle evidence of long-range endosomal transport of RABV and clathrin dependent uptake at the plasma membrane.
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Affiliation(s)
- Silvia Piccinotti
- Department of Microbiology and Immunobiology, Program in Virology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Sean P. J. Whelan
- Department of Microbiology and Immunobiology, Program in Virology, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Yamada K, Noguchi K, Komeno T, Furuta Y, Nishizono A. Efficacy of Favipiravir (T-705) in Rabies Postexposure Prophylaxis. J Infect Dis 2015; 213:1253-61. [PMID: 26655300 PMCID: PMC4799667 DOI: 10.1093/infdis/jiv586] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 11/20/2015] [Indexed: 12/25/2022] Open
Abstract
Rabies is a fatal encephalitis caused by rabies virus (RABV), and no antiviral drugs for RABV are currently available. We report for the first time the efficacy of favipiravir (T-705) against RABV in vitro and in vivo. T-705 produced a significant, 3–4 log10 reduction in the multiplication of street and fixed RABV strains in mouse neuroblastoma Neuro-2a cells, with half-maximal inhibitory concentrations of 32.4 µM and 44.3 µM, respectively. T-705 significantly improved morbidity and mortality among RABV-infected mice when orally administered at a dose of 300 mg/kg/day for 7 days, beginning 1 hour after inoculation. T-705 significantly reduced the rate of virus positivity in the brain. Furthermore, the effectiveness of T-705 was comparable to that of equine rabies virus immunoglobulin for postexposure prophylaxis. Collectively, our results suggest that T-705 is active against RABV and may serve as a potential alternative to rabies immunoglobulin in rabies postexposure prophylaxis.
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Affiliation(s)
| | - Kazuko Noguchi
- Department of Microbiology, Faculty of Medicine, Oita University, Yufu City Department of Food Science and Technology, Minami Kyushu University, Miyazaki City
| | - Takashi Komeno
- Research Laboratories, Toyama Chemical, Toyama City, Japan
| | - Yousuke Furuta
- Research Laboratories, Toyama Chemical, Toyama City, Japan
| | - Akira Nishizono
- Department of Microbiology, Faculty of Medicine, Oita University, Yufu City
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Characterization of a virulent dog-originated rabies virus affecting more than twenty fallow deer (Dama dama) in Inner Mongolia, China. INFECTION GENETICS AND EVOLUTION 2015; 31:127-34. [PMID: 25614955 DOI: 10.1016/j.meegid.2014.12.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 12/16/2014] [Accepted: 12/17/2014] [Indexed: 12/31/2022]
Abstract
Rabies has emerged as a serious problem in the most recent years in northern China. A rabies virus (RABV) isolate, IMDRV-13, was recovered from brain samples of dog-bitten rabid fallow deer (Dama dama) in a farm in Hohhot, Inner Mongolia. We tested the susceptibility of mouse neuroblastoma (MNA) cells and BSR cells as well as that of adult mice to IMDRV-13. The isolate was found to be a virulent isolate with an equivalent pathogenicity index (0.12) and a slight lower neurotropism index (1.07) compared with those of challenge virus standard, CVS-24, which was 0.13 and 1.23, respectively. The complete genome of IMDRV-13 was determined subsequently and found to be 11,924 nucleotides (nt) in length with the same genomic organization as other RABVs. Phylogenetic tree based on complete genome sequences of 43 RABV isolates and strains indicated that IMDRV-13, along with other two isolates in Inner Mongolia, CNM1101C and CNM1104D, clustered within the dog-associated China I clade, which is also the dominant lineage in the current rabies epidemic in China. In addition, sequence analysis of the glycoprotein G identified an amino acid substitution (I338→T338) unique to the IMDRV-13 within antigenic sites III (330-338), this mutation also leads to an additional potential N-glycosylation site (N336), which may represent a useful model to study relationship of N-glycosylation in G protein and specific properties such as pathogenicity or host adaption of RABV.
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Tang HB, Pan Y, Wei XK, Lu ZL, Lu W, Yang J, He XX, Xie LJ, Zeng L, Zheng LF, Xiong Y, Minamoto N, Luo TR. Re-emergence of rabies in the Guangxi province of Southern China. PLoS Negl Trop Dis 2014; 8:e3114. [PMID: 25275567 PMCID: PMC4183421 DOI: 10.1371/journal.pntd.0003114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 07/13/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Human rabies cases in the Guangxi province of China decreased from 839 in 1982 to 24 in 1995, but subsequently underwent a sharp increase, and has since maintained a high level. METHODOLOGY/PRINCIPAL FINDINGS 3,040 brain samples from normal dogs and cats were collected from 14 districts of Guangxi and assessed by RT-PCR. The brain samples showed an average rabies virus (RV) positivity rate of 3.26%, but reached 4.71% for the period Apr 2002 to Dec 2003. A total of 30 isolates were obtained from normal dogs and 28 isolates from rabid animals by the mouse inoculation test (MIT). Six representative group I and II RV isolates showed an LD50 of 10-5.35/ml to 10-6.19/ml. The reactivity of monoclonal antibodies (MAbs) to group I and II RV isolates from the Guangxi major epidemic showed that eight anti-G MAbs showed strong reactivity with isolates of group I and II with titers of ≥10,000; however, the MAbs 9-6, 13-3 and 12-14 showed lower reactivity. Phylogenetic analysis based on the G gene demonstrated that the Guangxi RV isolates have similar topologies with strong bootstrap values and are closely bonded. Alignment of deduced amino acids revealed that the mature G protein has four substitutions A96S, L132F, N436S, and A447I specific to group I, and 13 substitutions T90M, Y168C, S204G, T249I, P253S, S289T, V332I, Q382H, V427I, L474P, R463K Q486H, and T487N specific to group II, coinciding with the phylogenetic analysis of the isolates. CONCLUSIONS Re-emergence of human rabies has mainly occurred in rural areas of Guangxi since 1996. The human rabies incidence rate increased is related with RV positive rate of normal dogs. The Guangxi isolates tested showed a similar pathogenicity and antigenicity. The results of phylogenetic analysis coincide with that of alignment of deduced amino acids.
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Affiliation(s)
- Hai-Bo Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Guangxi, China
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Yan Pan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Guangxi, China
| | - Xian-Kai Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Guangxi, China
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Zhuan-Ling Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Guangxi, China
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Wu Lu
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Jian Yang
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Xiao-Xia He
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Lin-Juan Xie
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Lan Zeng
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Lie-Feng Zheng
- Guangxi Center for Animal Disease Control and Prevention, Guangxi, China
| | - Yi Xiong
- Guangxi Center for Animal Disease Control and Prevention, Guangxi, China
| | - Nobuyuki Minamoto
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
| | - Ting Rong Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Guangxi, China
- College of Animal Sciences and Veterinary Medicine, Guangxi University, Guangxi, China
- * E-mail:
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