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Miah M, Davis AM, Hannoun C, Said JS, Fitzek M, Preston M, Smith D, Uwamariya C, Kärmander A, Lundbäck T, Bergström T, Trybala E. Identification of epidermal growth factor receptor-tyrosine kinase inhibitor targeting the VP1 pocket of human rhinovirus. Antimicrob Agents Chemother 2024; 68:e0106423. [PMID: 38349161 PMCID: PMC10916396 DOI: 10.1128/aac.01064-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/10/2024] [Indexed: 03/07/2024] Open
Abstract
Screening a library of 1,200 preselected kinase inhibitors for anti-human rhinovirus 2 (HRV-2) activity in HeLa cells identified a class of epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKI) as effective virus blockers. These were based on the 4-anilinoquinazoline-7-oxypiperidine scaffold, with the most potent representative AZ5385 inhibiting the virus with EC50 of 0.35 µM. Several structurally related analogs confirmed activity in the low µM range, while interestingly, other TKIs targeting EGFR lacked anti-HRV-2 activity. To further probe this lack of association between antiviral activity and EGFR inhibition, we stained infected cells with antibodies specific for activated EGFR (Y1068) and did not observe a dependency on EGFR-TK activity. Instead, consecutive passages of HRV-2 in HeLa cells in the presence of a compound and subsequent nucleotide sequence analysis of resistant viral variants identified the S181T and T210A alterations in the major capsid VP1 protein, with both residues located in the vicinity of a known hydrophobic pocket on the viral capsid. Further characterization of the antiviral effects of AZ5385 showed a modest virus-inactivating (virucidal) activity, while anti-HRV-2 activity was still evident when the inhibitor was added as late as 10 h post infection. The RNA copy/infectivity ratio of HRV-2 propagated in AZ5385 presence was substantially higher than that of control HRV indicating that the compound preferentially targeted HRV progeny virions during their maturation in infected cells. Besides HRV, the compound showed anti-respiratory syncytial virus activity, which warrants its further studies as a candidate compound against viral respiratory infections.
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Affiliation(s)
- Masum Miah
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Andrew M. Davis
- Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Mölndal, Sweden
- Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Cambridge, United Kingdom
| | - Charles Hannoun
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Joanna S. Said
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Martina Fitzek
- HTS Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Macclesfield, United Kingdom
| | - Marian Preston
- HTS Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Macclesfield, United Kingdom
| | - Dave Smith
- Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Cambridge, United Kingdom
| | - Colores Uwamariya
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Ambjörn Kärmander
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Thomas Lundbäck
- Discovery Sciences, BioPharmaceutical R&D, AstraZeneca, Mölndal, Sweden
| | - Tomas Bergström
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
| | - Edward Trybala
- Department of Infectious Disease, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, Göteborg, Sweden
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Lyashko AV, Timofeeva TA, Rudneva IA, Lomakina NF, Treshchalina AA, Gambaryan AS, Sorokin EV, Tsareva TR, Adams SE, Prilipov AG, Sadykova GK, Timofeev BI, Logunov DY, Gintsburg AL. Antigenic Architecture of the H7N2 Influenza Virus Hemagglutinin Belonging to the North American Lineage. Int J Mol Sci 2023; 25:212. [PMID: 38203384 PMCID: PMC10779424 DOI: 10.3390/ijms25010212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
The North American low pathogenic H7N2 avian influenza A viruses, which lack the 220-loop in the hemagglutinin (HA), possess dual receptor specificity for avian- and human-like receptors. The purpose of this work was to determine which amino acid substitutions in HA affect viral antigenic and phenotypic properties that may be important for virus evolution. By obtaining escape mutants under the immune pressure of treatment with monoclonal antibodies, antigenically important amino acids were determined to be at positions 125, 135, 157, 160, 198, 200, and 275 (H3 numbering). These positions, except 125 and 275, surround the receptor binding site. The substitutions A135S and A135T led to the appearance of an N-glycosylation site at 133N, which reduced affinity for the avian-like receptor analog and weakened binding with tested monoclonal antibodies. Additionally, the A135S substitution is associated with the adaptation of avian viruses to mammals (cat, human, or mouse). The mutation A160V decreased virulence in mice and increased affinity for the human-type receptor analog. Conversely, substitution G198E, in combination with 157N or 160E, displayed reduced affinity for the human-type receptor analog.
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Affiliation(s)
- Aleksandr V. Lyashko
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Tatiana A. Timofeeva
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Irina A. Rudneva
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Natalia F. Lomakina
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Anastasia A. Treshchalina
- Federal Scientific Center for the Research and Development of Immune-and-Biological Products, 108819 Moscow, Russia (A.S.G.)
| | - Alexandra S. Gambaryan
- Federal Scientific Center for the Research and Development of Immune-and-Biological Products, 108819 Moscow, Russia (A.S.G.)
| | - Evgenii V. Sorokin
- The Smorodintsev Research Institute of Influenza, the Ministry of Health of the Russian Federation, 197376 St. Petersburg, Russia
| | - Tatiana R. Tsareva
- The Smorodintsev Research Institute of Influenza, the Ministry of Health of the Russian Federation, 197376 St. Petersburg, Russia
| | - Simone E. Adams
- Institute of Microbiology, Lausanne University Hospital, 1011 Lausanne, Switzerland
| | - Alexey G. Prilipov
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Galina K. Sadykova
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Boris I. Timofeev
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Denis Y. Logunov
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
| | - Alexander L. Gintsburg
- The Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098 Moscow, Russia (T.A.T.)
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Dai W, Li X, Liu Z, Zhang C. Identification of four neutralizing antigenic sites on the enterovirus D68 capsid. J Virol 2023; 97:e0160023. [PMID: 38047678 PMCID: PMC10734511 DOI: 10.1128/jvi.01600-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/14/2023] [Indexed: 12/05/2023] Open
Abstract
IMPORTANCE Enterovirus D68 (EV-D68) is an emerging respiratory pathogen associated with acute flaccid myelitis. Currently, no approved vaccines or antiviral drugs are available. Here, we report four functionally independent neutralizing antigenic sites (I to IV) by analyses of neutralizing monoclonal antibody (MAb)-resistant mutants. Site I is located in the VP1 BC loop near the fivefold axis. Site II resides in the VP2 EF loop, and site III is situated in VP1 C-terminus; both sites are located at the south rim of the canyon. Site IV is composed of residue in VP2 βB strand and residues in the VP3 BC loop and resides around the threefold axis. The developed MAbs targeting the antigenic sites can inhibit viral binding to cells. These findings advance the understanding of the recognition of EV-D68 by neutralizing antibodies and viral evolution and immune escape and also have important implications for the development of novel EV-D68 vaccines.
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Affiliation(s)
- Wenlong Dai
- Department of Pharmaceutics, National Vaccine Innovation Platform, School of Pharmacy, Nanjing Medical University, Nanjing, China
| | - Xue Li
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
- Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Zeyu Liu
- Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Chao Zhang
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
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4
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Krivitskaya V, Petrova E, Sorokin E, Tsareva T, Sverlova M, Komissarova K, Sominina A, Danilenko D. Characterization of a Panel of Monoclonal Antibodies Targeting the F-Protein of the Respiratory Syncytial Virus (RSV) for the Typing of Contemporary Circulating Strains. Trop Med Infect Dis 2023; 9:1. [PMID: 38276631 PMCID: PMC10819491 DOI: 10.3390/tropicalmed9010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 01/27/2024] Open
Abstract
Respiratory syncytial virus (RSV) is the most common cause of upper and lower respiratory tract infections in infants and young children. Virus-specific monoclonal antibodies (mAbs) can be used for diagnosis, prophylaxis, and research of RSV pathogenesis. A panel of 16 anti-RSV mAbs was obtained from mice immunized by RSV strain Long. Half of them had virus-neutralizing activity. According to Western blot all of these mAbs effectively bound native oligomeric (homodimeric and homotrimeric) forms of the RSV fusion (F) protein. Only five of the mAbs interacted with the monomeric form, and only one of these possessed neutralizing activity. None of these mAbs, nor the commercial humanized neutralizing mAb palivizumab, reacted with the denaturated F protein. Thus, interaction of all these mAbs with F protein had clear conformational dependence. Competitive ELISA and neutralization assays allowed the identification of nine antigenic target sites for the interaction of mAb with the F protein. Five partially overlapping sites may represent a complex spatial structure of one antigenic determinant, including one neutralizing and four non-neutralizing epitopes. Four sites (three neutralizing and one non-neutralizing) were found to be distinct. As a result of virus cultivation RSV-A, strain Long, in the presence of a large amount of one of the neutralizing mAbs, an escape mutant with a substitution, N240S, in the F protein, was obtained. Thus, it was shown for the first time that position 240 is critical for the protective effect of an anti-RSV antibody. To assess the ability of these mAbs to interact with modern RSV strains circulating in St. Petersburg (Russia) between 2014 and 2022, 73 RSV-A and 22 RSV-B isolates were analyzed. Six mAbs were directed to conserved epitopes of the F protein as they interacted most efficiently with both RSV subtypes in a fixed cell-ELISA and could be used for diagnostic assays detecting RSV.
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Affiliation(s)
- Vera Krivitskaya
- Smorodintsev Research Institute of Influenza, The Ministry of Health of the Russian Federation, WHO National Influenza Centre, St. Petersburg 197376, Russia; (E.P.); (E.S.); (T.T.); (M.S.); (K.K.); (A.S.); (D.D.)
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5
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Wan Z, Gong J, Sang J, Jiang W, Zhao Z, Tang T, Li Y, Zhao Y, Kan Q, Xie Q, Li T, Shao H, Gao W, Qin A, Ye J. Identification of key residues of B cell epitopes in hemagglutinin of H6 influenza A virus. Microbiol Spectr 2023; 11:e0205923. [PMID: 37882566 PMCID: PMC10715104 DOI: 10.1128/spectrum.02059-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/02/2023] [Indexed: 10/27/2023] Open
Abstract
IMPORTANCE Since the escape immunity of influenza A viruses (IAVs) is mainly caused by the continuous antigenic variations in HA, the identification of key antigenic epitopes is crucial for better understanding of the escape immunity and vaccine development for IAVs. The antigenic sites of several HA subtypes, including H1, H3, H5, and H9, have been well characterized, whereas those of H6 subtype are poorly understood. Here, we mapped nine key residues of antigenic epitopes in H6 through escape mutants using a panel of MAbs. Moreover, MAbs 4C2 and 6E3, targeting 140 and 89 residues, respectively, could protect mice against lethal challenge of MA E-Teal/417. These key residues of antigenic epitopes identified here provide the molecular targets for further elucidating the antigenic evolution of H6 and better preparing the vaccine against H6 IAV.
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Affiliation(s)
- Zhimin Wan
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Jianxi Gong
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Jianjun Sang
- Sinopharm Yangzhou VAC Biological Engineering Co. Ltd, Yangzhou, Jiangsu, China
| | - Wenjie Jiang
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Zhehong Zhao
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Ting Tang
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Yafeng Li
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Yichao Zhao
- Sinopharm Yangzhou VAC Biological Engineering Co. Ltd, Yangzhou, Jiangsu, China
| | - Qiuqi Kan
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Quan Xie
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Tuofan Li
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Hongxia Shao
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Wei Gao
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Aijian Qin
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jianqiang Ye
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu Province, China
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Svoboda P, Haviernik J, Bednar P, Matkovic M, Cervantes Rincón T, Keeffe J, Palus M, Salat J, Agudelo M, Nussenzweig MC, Cavalli A, Robbiani DF, Ruzek D. A combination of two resistance mechanisms is critical for tick-borne encephalitis virus escape from a broadly neutralizing human antibody. Cell Rep 2023; 42:113149. [PMID: 37715951 PMCID: PMC10591882 DOI: 10.1016/j.celrep.2023.113149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/26/2023] [Accepted: 08/31/2023] [Indexed: 09/18/2023] Open
Abstract
Tick-borne encephalitis virus (TBEV) is a flavivirus that causes human neuroinfections and represents a growing health problem. The human monoclonal antibody T025 targets envelope protein domain III (EDIII) of TBEV and related tick-borne flaviviruses, potently neutralizing TBEV in vitro and in preclinical models, representing a promising candidate for clinical development. We demonstrate that TBEV escape in the presence of T025 or T028 (another EDIII-targeting human monoclonal antibody) results in virus variants of reduced pathogenicity, characterized by distinct sets of amino acid changes in EDII and EDIII that are jointly needed to confer resistance. EDIII substitution K311N impairs formation of a salt bridge critical for T025-epitope interaction. EDII substitution E230K is not on the T025 epitope but likely induces quaternary rearrangements of the virus surface because of repulsion of positively charged residues on the adjacent EDI. A combination of T025 and T028 prevents virus escape and improves neutralization.
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Affiliation(s)
- Pavel Svoboda
- Veterinary Research Institute, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Department of Pharmacology and Pharmacy, Faculty of Veterinary Medicine, University of Veterinary Sciences, Brno, Czech Republic
| | - Jan Haviernik
- Veterinary Research Institute, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Petr Bednar
- Veterinary Research Institute, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Milos Matkovic
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Tomás Cervantes Rincón
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | | | - Martin Palus
- Veterinary Research Institute, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Jiri Salat
- Veterinary Research Institute, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Marianna Agudelo
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY, USA
| | - Michel C Nussenzweig
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY, USA; Howard Hughes Medical Institute, New York, NY, USA
| | - Andrea Cavalli
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland; Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Davide F Robbiani
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland.
| | - Daniel Ruzek
- Veterinary Research Institute, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi City, Japan.
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7
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Asfor AS, Reddy VRAP, Nazki S, Urbaniec J, Brodrick AJ, Broadbent AJ. Modeling Infectious Bursal Disease Virus (IBDV) Antigenic Drift In Vitro. Viruses 2022; 15:130. [PMID: 36680169 PMCID: PMC9867341 DOI: 10.3390/v15010130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/19/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Infectious bursal disease virus (IBDV) vaccines do not induce sterilizing immunity, and vaccinated birds can become infected with field strains. Vaccine-induced immune selection pressure drives the evolution of antigenic drift variants that accumulate amino acid changes in the hypervariable region (HVR) of the VP2 capsid, which may lead to vaccine failures. However, there is a lack of information regarding how quickly mutations arise, and the relative contribution different residues make to immune escape. To model IBDV antigenic drift in vitro, we serially passaged a classical field strain belonging to genogroup A1 (F52/70) ten times, in triplicate, in the immortalized chicken B cell line, DT40, in the presence of sub-neutralizing concentrations of sera from birds inoculated with IBDV vaccine strain 2512, to generate escape mutants. This assay simulated a situation where classical strains may infect birds that have suboptimal vaccine-induced antibody responses. We then sequenced the HVR of the VP2 capsid at passage (P) 5 and 10 and compared the sequences to the parental virus (P0), and to the virus passaged in the presence of negative control chicken serum that lacked IBDV antibodies. Two escape mutants at P10 had the same mutations, D279Y and G281R, and a third had mutations S251I and D279N. Furthermore, at P5, the D279Y mutation was detectable, but the G281R mutation was not, indicating the mutations arose with different kinetics.
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Affiliation(s)
- Amin S. Asfor
- Birnaviruses Group, The Pirbright Institute, Ash Road, Woking GU24 0NF, UK
- Department of Comparative Biomedical Sciences, Section Infection and Immunity, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guilford GU2 7AL, UK
| | | | - Salik Nazki
- Birnaviruses Group, The Pirbright Institute, Ash Road, Woking GU24 0NF, UK
- Pandemic Sciences Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Joanna Urbaniec
- Birnaviruses Group, The Pirbright Institute, Ash Road, Woking GU24 0NF, UK
- Department of Comparative Biomedical Sciences, Section Infection and Immunity, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guilford GU2 7AL, UK
| | - Andrew J. Brodrick
- Department of Animal and Avian Sciences, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
| | - Andrew J. Broadbent
- Birnaviruses Group, The Pirbright Institute, Ash Road, Woking GU24 0NF, UK
- Department of Animal and Avian Sciences, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
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8
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Xu C, Zhang N, Yang Y, Liang W, Zhang Y, Wang J, Suzuki Y, Wu Y, Chen Y, Yang H, Qiao C, Chen H. Immune Escape Adaptive Mutations in Hemagglutinin Are Responsible for the Antigenic Drift of Eurasian Avian-Like H1N1 Swine Influenza Viruses. J Virol 2022;:e0097122. [PMID: 35916512 DOI: 10.1128/jvi.00971-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The continuous antigenic variation of influenza A viruses remains a major hurdle for vaccine selection; however, the molecular determinants and mechanisms of antigenic change remain largely unknown. In this study, two escape mutants were generated by serial passages of the Eurasian avian-like H1N1 swine influenza virus (EA H1N1 SIV) A/swine/Henan/11/2005 (HeN11) in the presence of two neutralizing monoclonal antibodies (mAbs) against the hemagglutinin (HA) protein, which were designated HeN11-2B6-P5 and HeN11-4C7-P8, respectively. The HeN11-2B6-P5 mutant simultaneously harbored the N190D and I230M substitutions in HA, whereas HeN11-4C7-P8 harbored the M269R substitution in HA (H3 numbering). The effects of each of these substitutions on viral antigenicity were determined by measuring the neutralization and hemagglutination inhibition (HI) titers with mAbs and polyclonal sera raised against the representative viruses. The results indicate that residues 190 and 269 are key determinants of viral antigenic variation. In particular, the N190D mutation had the greatest antigenic impact, as determined by the HI assay. Further studies showed that both HeN11-2B6-P5 and HeN11-4C7-P8 maintained the receptor-binding specificity of the parent virus, although the single mutation N190D decreased the binding affinity for the human-type receptor. The replicative ability in vitro of HeN11-2B6-P5 was increased, whereas that of HeN11-4C7-P8 was decreased. These findings extend our understanding of the antigenic evolution of influenza viruses under immune pressure and provide insights into the functional effects of amino acid substitutions near the receptor-binding site and the interplay among receptor binding, viral replication, and antigenic drift. IMPORTANCE The antigenic changes that occur continually in the evolution of influenza A viruses remain a great challenge for the effective control of disease outbreaks. Here, we identified three amino acid substitutions (at positions 190, 230, and 269) in the HA of EA H1N1 SIVs that determine viral antigenicity and result in escape from neutralizing monoclonal antibodies. All three of these substitutions have emerged in nature. Of note, residues 190 and 230 have synergistic effects on receptor binding and antigenicity. Our findings provide a better understanding of the functional effects of amino acid substitutions in HA and their consequences for the antigenic drift of influenza viruses.
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López D. Predicted HLA Class I and Class II Epitopes From Licensed Vaccines Are Largely Conserved in New SARS-CoV-2 Omicron Variant of Concern. Front Immunol 2022; 13:832889. [PMID: 35154154 PMCID: PMC8831693 DOI: 10.3389/fimmu.2022.832889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/03/2022] [Indexed: 12/03/2022] Open
Abstract
The potential effect of emerging SARS-CoV-2 variants on vaccine efficacy is an issue of critical importance. In this study, the possible impact of mutations that facilitate virus escape from the cytotoxic and the helper cellular immune responses in the new SARS-CoV-2 Omicron variant of concern was analyzed for the 551 and 41 most abundant HLA class I and II alleles, respectively. Computational prediction showed that almost all of these 592 alleles, which cover >90% of the human population, contain enough epitopes without escape mutations in the emerging SARS-CoV-2 Omicron variant of concern. These data suggest that both cytotoxic and helper cellular immune protection elicited by currently licensed vaccines are virtually unaffected by the highly contagious SARS-CoV-2 Omicron variant of concern.
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Affiliation(s)
- Daniel López
- Presentation and Immune Regulation Unit, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Spain
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10
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Martín-Galiano AJ, Díez-Fuertes F, McConnell MJ, López D. Predicted Epitope Abundance Supports Vaccine-Induced Cytotoxic Protection Against SARS-CoV-2 Variants of Concern. Front Immunol 2021; 12:732693. [PMID: 34899692 PMCID: PMC8656262 DOI: 10.3389/fimmu.2021.732693] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
The effect of emerging SARS-CoV-2 variants on vaccine efficacy is of critical importance. In this study, the potential impact of mutations that facilitate escape from the cytotoxic cellular immune response in these new virus variants for the 551 most abundant HLA class I alleles was analyzed. Computational prediction showed that most of these alleles, that cover >90% of the population, contain enough epitopes without escape mutations in the principal SARS-CoV-2 variants. These data suggest that the cytotoxic cellular immune protection elicited by vaccination is not greatly affected by emerging SARS-CoV-2 variants.
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Affiliation(s)
- Antonio J Martín-Galiano
- Intrahospital Infection Laboratory, National Center of Microbiology, Instituto de Salud Carlos III, Majadahonda, Spain
| | - Francisco Díez-Fuertes
- Acquired Immune Deficiency Syndrome (AIDS) Immunopathology Unit, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Spain
| | - Michael J McConnell
- Intrahospital Infection Laboratory, National Center of Microbiology, Instituto de Salud Carlos III, Majadahonda, Spain
| | - Daniel López
- Presentation and Immune Regulation Unit, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Spain
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11
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Matsuzaki Y, Sugawara K, Shimotai Y, Kadowaki Y, Hongo S, Mizuta K, Nishimura H. Growth Kinetics of Influenza C Virus Antigenic Mutants That Escaped from Anti-Hemagglutinin Esterase Monoclonal Antibodies and Viral Antigenic Changes Found in Field Isolates. Viruses 2021; 13:401. [PMID: 33802440 PMCID: PMC7998938 DOI: 10.3390/v13030401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 01/16/2023] Open
Abstract
The antigenicity of the hemagglutinin esterase (HE) glycoprotein of influenza C virus is known to be stable; however, information about residues related to antigenic changes has not yet been fully acquired. Using selection with anti-HE monoclonal antibodies, we previously obtained some escape mutants and identified four antigenic sites, namely, A-1, A-2, A-3, and Y-1. To confirm whether the residues identified as the neutralizing epitope possibly relate to the antigenic drift, we analyzed the growth kinetics of these mutants. The results showed that some viruses with mutations in antigenic site A-1 were able to replicate to titers comparable to that of the wild-type, while others showed reduced titers. The mutants possessing substitutions in the A-2 or A-3 site replicated as efficiently as the wild-type virus. Although the mutant containing a deletion at positions 192 to 195 in the Y-1 site showed lower titers than the wild-type virus, it was confirmed that this region in the 190-loop on the top side of the HE protein is not essential for viral propagation. Then, we revealed that antigenic changes due to substitutions in the A-1, A-3, and/or Y-1 site had occurred in nature in Japan for the past 30 years. These results suggest that some residues (i.e., 125, 176, 192) in the A-1 site, residue 198 in the A-3 site, and residue 190 in the Y-1 site are likely to mediate antigenic drift while maintaining replicative ability.
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Affiliation(s)
- Yoko Matsuzaki
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan; (K.S.); (Y.S.); (Y.K.); (S.H.)
| | - Kanetsu Sugawara
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan; (K.S.); (Y.S.); (Y.K.); (S.H.)
| | - Yoshitaka Shimotai
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan; (K.S.); (Y.S.); (Y.K.); (S.H.)
| | - Yoko Kadowaki
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan; (K.S.); (Y.S.); (Y.K.); (S.H.)
| | - Seiji Hongo
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan; (K.S.); (Y.S.); (Y.K.); (S.H.)
| | - Katsumi Mizuta
- Department of Microbiology, Yamagata Prefectural Institute of Public Health, Yamagata 990-0031, Japan;
| | - Hidekazu Nishimura
- Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai 983-8520, Japan;
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12
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Abstract
Despite the success of antiretroviral therapy in suppressing HIV to an undetectable level in the blood and improving patients' quality of life, HIV persists in antiretroviral therapy-treated patients and threatens their lives. Anti-HIV chimeric antigen receptor (CAR) T cells could offer a cure by recognizing and killing virus-producing cells in an Env-specific manner. In this review, the authors summarize several important aspects of the development of anti-HIV CAR T cells, with a special focus on the evolution of CAR design for enhanced potency and targeting specificity, and also outline the challenges that still need to be addressed to take anti-HIV CAR T cells from a hopeful approach to a real HIV cure.
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Affiliation(s)
- Yunyu Mao
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, 201508, China
| | - Chen Zhao
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, 201508, China
| | - Peiyong Zheng
- LongHua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Xiaoyan Zhang
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, 201508, China
| | - Jianqing Xu
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, 201508, China
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13
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Abstract
Protective vaccines for hypervariable pathogens are urgently needed. It has been proposed that amputating highly variable epitopes from vaccine antigens would induce the production of broadly protective antibodies targeting conserved epitopes. However, so far, these approaches have failed, partially because conserved epitopes are occluded in vivo and partially because co-localizing patterns of immunodominance and antigenic variability render variable epitopes the primary target for antibodies in natural infection. In this Perspective, to recast the challenge of vaccine development for hypervariable pathogens, I evaluate convergent mechanisms of adaptive variation, such as intrahost immune-mediated diversification, spatiotemporally defined antigenic space, and infection-enhancing cross-immunoreactivity. The requirements of broadly protective immune responses targeting variable pathogens are formulated in terms of cross-immunoreactivity, stoichiometric thresholds for neutralization, and the elicitation of antibodies targeting physicochemically conserved signatures within sequence variable domains.
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Affiliation(s)
- Alexander I Mosa
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada
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14
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Szillat KP, Koethe S, Wernike K, Höper D, Beer M. A CRISPR/Cas9 Generated Bovine CD46-knockout Cell Line-A Tool to Elucidate the Adaptability of Bovine Viral Diarrhea Viruses (BVDV). Viruses 2020; 12:E859. [PMID: 32781607 DOI: 10.3390/v12080859] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/31/2020] [Accepted: 08/02/2020] [Indexed: 12/16/2022] Open
Abstract
Bovine viral diarrhea virus (BVDV) entry into a host cell is mediated by the interaction of the viral glycoprotein E2 with the cellular transmembrane CD46 receptor. In this study, we generated a stable Madin-Darby Bovine Kidney (MDBK) CD46-knockout cell line to study the ability of different pestivirus A and B species (BVDV-1 and -2) to escape CD46-dependent cell entry. Four different BVDV-1/2 isolates showed a clearly reduced infection rate after inoculation of the knockout cells. However, after further passaging starting from the remaining virus foci on the knockout cell line, all tested virus isolates were able to escape CD46-dependency and grew despite the lack of the entry receptor. Whole-genome sequencing of the escape-isolates suggests that the genetic basis for the observed shift in infectivity is an amino acid substitution of an uncharged (glycine/asparagine) for a charged amino acid (arginine/lysine) at position 479 in the ERNS in three of the four isolates tested. In the fourth isolate, the exchange of a cysteine at position 441 in the ERNS resulted in a loss of ERNS dimerization that is likely to influence viral cell-to-cell spread. In general, the CD46-knockout cell line is a useful tool to analyze the role of CD46 for pestivirus replication and the virus-receptor interaction.
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Jin F, Dong X, Wan Z, Ren D, Liu M, Geng T, Zhang J, Gao W, Shao H, Qin A, Ye J. A Single Mutation N166D in Hemagglutinin Affects Antigenicity and Pathogenesis of H9N2 Avian Influenza Virus. Viruses 2019; 11:v11080709. [PMID: 31382442 PMCID: PMC6723300 DOI: 10.3390/v11080709] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/29/2019] [Accepted: 07/31/2019] [Indexed: 01/01/2023] Open
Abstract
Some immune escape mutants of H9N2 virus and the corresponding mutations in hemagglutinin (HA) have been documented, but little is known about the impact of a single mutation on the antigenicity and pathogenesis of H9N2. In this study, seven critical sites in HA associated with the antigenicity were identified and the effects of a HA mutation (N166D) derived from a H9N2 escape mutant (m3F2) were investigated. Although N166D did not significantly affect viral replication in Madin–Darby canine kidney (MDCK) cells and viral shedding in the larynx and cloaca of chicken, N166D attenuated the pathogenesis of the virus in mice. Compared to the rescued RgPR8-H9_166D, RgPR8-H9_166N caused greater body weight loss and higher viral titers in the lungs of the infected mice. Moreover, hemagglutination inhibition (HI) assay for the sera from the chickens infected with wild type H9N2 and mutant m3F2 showed that N166D mutation could result in weak antibody response in chickens. Considering the field strains of H9N2 with N166D mutation are frequently isolated in the countries with H9N2 vaccination, the findings that the single mutation in HA, N166D, affected both the antigenicity and pathogenesis of H9N2 highlight the significance of surveillance on such mutation that may contribute to the failure of H9N2 vaccination in the field.
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Affiliation(s)
- Fang Jin
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Xiaomei Dong
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Zhimin Wan
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Dan Ren
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Min Liu
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Tuoyu Geng
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Jianjun Zhang
- Sinopharm Yangzhou VAC Biological Engineering Co. Ltd., Yangzhou 225127, China
| | - Wei Gao
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Hongxia Shao
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Aijian Qin
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Jianqiang Ye
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China.
- Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, China.
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China.
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China.
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16
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Matsuzaki Y, Sugawara K, Furuse Y, Shimotai Y, Hongo S, Mizuta K, Nishimura H. Neutralizing Epitopes and Residues Mediating the Potential Antigenic Drift of the Hemagglutinin-Esterase Protein of Influenza C Virus. Viruses 2018; 10:E417. [PMID: 30096880 PMCID: PMC6116000 DOI: 10.3390/v10080417] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/07/2018] [Accepted: 08/08/2018] [Indexed: 12/22/2022] Open
Abstract
We mapped the hemagglutinin-esterase (HE) antigenic epitopes of the influenza C virus on the three-dimensional (3D) structure of the HE glycoprotein using 246 escape mutants that were selected by a panel of nine anti-HE monoclonal antibodies (MAbs), including seven of the C/Ann Arbor/1/50 virus and two of the C/Yamagata/15/2004 virus. The frequency of variant selection in the presence of anti-HE MAbs was very low, with frequencies ranging from 10-4.62 to 10-7.58 for the C/Ann Arbor/1/50 virus and from 10-7.11 to 10-9.25 for the C/Yamagata/15/2004 virus. Sequencing of mutant HE genes revealed 25 amino acid substitutions at 16 positions in three antigenic sites: A-1, A-2, and A-3, and a newly designated Y-1 site. In the 3D structure, the A-1 site was widely located around the receptor-binding site, the A-2 site was near the receptor-destroying enzyme site, and the Y-1 site was located in the loop on the topside of HE. The hemagglutination inhibition reactions of the MAbs with influenza C viruses, circulating between 1947 and 2016, were consistent with the antigenic-site amino acid changes. We also found some amino acid variations in the antigenic site of recently circulating strains with antigenic changes, suggesting that viruses that have the potential to alter antigenicity continue to circulate in humans.
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Affiliation(s)
- Yoko Matsuzaki
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan.
| | - Kanetsu Sugawara
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan.
| | - Yuki Furuse
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan.
- Hakubi Center for Advanced Research, Kyoto University, Kyoto 606-8501, Japan.
| | - Yoshitaka Shimotai
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan.
| | - Seiji Hongo
- Department of Infectious Diseases, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan.
| | - Katsumi Mizuta
- Department of Microbiology, Yamagata Prefectural Institute of Public Health, Yamagata 990-0031, Japan.
| | - Hidekazu Nishimura
- Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai 983-8520, Japan.
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17
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Eyer L, Kondo H, Zouharova D, Hirano M, Valdés JJ, Muto M, Kastl T, Kobayashi S, Haviernik J, Igarashi M, Kariwa H, Vaculovicova M, Cerny J, Kizek R, Kröger A, Lienenklaus S, Dejmek M, Nencka R, Palus M, Salat J, De Clercq E, Yoshii K, Ruzek D. Escape of Tick-Borne Flavivirus from 2'- C-Methylated Nucleoside Antivirals Is Mediated by a Single Conservative Mutation in NS5 That Has a Dramatic Effect on Viral Fitness. J Virol 2017; 91:e01028-17. [PMID: 28814513 DOI: 10.1128/JVI.01028-17] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 08/01/2017] [Indexed: 12/30/2022] Open
Abstract
Tick-borne encephalitis virus (TBEV) causes a severe and potentially fatal neuroinfection in humans. Despite its high medical relevance, no specific antiviral therapy is currently available. Here we demonstrate that treatment with a nucleoside analog, 7-deaza-2'-C-methyladenosine (7-deaza-2'-CMA), substantially improved disease outcomes, increased survival, and reduced signs of neuroinfection and viral titers in the brains of mice infected with a lethal dose of TBEV. To investigate the mechanism of action of 7-deaza-2'-CMA, two drug-resistant TBEV clones were generated and characterized. The two clones shared a signature amino acid substitution, S603T, in the viral NS5 RNA-dependent RNA polymerase (RdRp) domain. This mutation conferred resistance to various 2'-C-methylated nucleoside derivatives, but no cross-resistance was seen with other nucleoside analogs, such as 4'-C-azidocytidine and 2'-deoxy-2'-beta-hydroxy-4'-azidocytidine (RO-9187). All-atom molecular dynamics simulations revealed that the S603T RdRp mutant repels a water molecule that coordinates the position of a metal ion cofactor as 2'-C-methylated nucleoside analogs approach the active site. To investigate its phenotype, the S603T mutation was introduced into a recombinant TBEV strain (Oshima-IC) generated from an infectious cDNA clone and into a TBEV replicon that expresses a reporter luciferase gene (Oshima-REP-luc2A). The mutants were replication impaired, showing reduced growth and a small plaque size in mammalian cell culture and reduced levels of neuroinvasiveness and neurovirulence in rodent models. These results indicate that TBEV resistance to 2'-C-methylated nucleoside inhibitors is conferred by a single conservative mutation that causes a subtle atomic effect within the active site of the viral NS5 RdRp and is associated with strong attenuation of the virus.IMPORTANCE This study found that the nucleoside analog 7-deaza-2'-C-methyladenosine (7-deaza-2'-CMA) has high antiviral activity against tick-borne encephalitis virus (TBEV), a pathogen that causes severe human neuroinfections in large areas of Europe and Asia and for which there is currently no specific therapy. Treating mice infected with a lethal dose of TBEV with 7-deaza-2'-CMA resulted in significantly higher survival rates and reduced the severity of neurological signs of the disease. Thus, this compound shows promise for further development as an anti-TBEV drug. It is important to generate drug-resistant mutants to understand how the drug works and to develop guidelines for patient treatment. We generated TBEV mutants that were resistant not only to 7-deaza-2'-CMA but also to a broad range of other 2'-C-methylated antiviral medications. Our findings suggest that combination therapy may be used to improve treatment and reduce the emergence of drug-resistant viruses during nucleoside analog therapy for TBEV infection.
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Abstract
The presence of anti-hepatitis B virus (HBV) core antibody (anti-HBc) is considered a sensitive lifetime marker of HBV infection. Here, we examined this dogma by investigating the prevalence of hepatitis B viremia in anti-HBc negative complete vaccines in Taiwan.A total of 795 participants (1.7-20.0 years old) had completed HBV vaccination in infancy and were anti-HBc negative. Serum samples were available for 460 individuals with isolated anti-HBV surface antibodies (anti-HBs) (HBsAg-negative and anti-HBc negative) and for 245 individuals who tested negative for all 3 markers (triple seronegative). All samples were submitted for polymerase chain reaction (PCR) targeting both the preS/S and X/pre-C gene regions.Of the 460 participants with isolated anti-HBs, 26 (5.65%) were positive for HBV by 2-target PCR. Of the 245 triple seronegative samples, 12 (4.90%) were positive for HBV DNA. In the former group, the prevalence of viremia was significantly higher in individuals aged 6 to 10 years than in all other ages combined (11.82% vs 3.7%, P = 0.001). The anti-HBs titers were significantly lower in participants 6 to 10 years old than in all other ages combined (72.06 vs 99.64 mIU/mL, P = 0.038). In total, 7 (0.99%) subjects had quantifiable HBV DNA levels (280-18,820 IU/mL). Sequence analysis of the S gene revealed vaccine escape like mutations.Hepatitis B viremia can occur in completely vaccinated individuals who are negative for anti-HBc.
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Affiliation(s)
- Ming-Wei Lai
- Division of Pediatric Gastroenterology
- Liver Research Center, Chang Gung Memorial Hospital, Linkou Branch
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Tzou-Yien Lin
- Division of Pediatric Infectious Diseases, Department of Pediatrics
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Kung-Hao Liang
- Liver Research Center, Chang Gung Memorial Hospital, Linkou Branch
| | - Wey-Ran Lin
- Department of Gastroenterology and Hepatology
- Liver Research Center, Chang Gung Memorial Hospital, Linkou Branch
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Chau-Ting Yeh
- Department of Gastroenterology and Hepatology
- Liver Research Center, Chang Gung Memorial Hospital, Linkou Branch
- Molecular Medicine Research Center, Chang Gung University
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Magiorkinis E, Paraskevis D, Pavlopoulou I, Kantzanou M, Haida C, Hatzakis A, Boletis I. Renal transplantation from hepatitis B surface antigen (HBsAg)-positive donors to HBsAg-negative recipients: a case of post-transplant fulminant hepatitis associated with an extensively mutated hepatitis B virus strain and review of the current literature. Transpl Infect Dis 2013; 15:393-9. [DOI: 10.1111/tid.12094] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 11/25/2012] [Accepted: 12/08/2012] [Indexed: 02/06/2023]
Affiliation(s)
- E. Magiorkinis
- Department of Hygiene, Epidemiology and Medical Statistics; Athens University Medical School; Athens; Greece
| | - D. Paraskevis
- Department of Hygiene, Epidemiology and Medical Statistics; Athens University Medical School; Athens; Greece
| | - I.D. Pavlopoulou
- Pediatric Research Laboratory; Faculty of Nursing; University of Athens; Athens; Greece
| | - M. Kantzanou
- Department of Hygiene, Epidemiology and Medical Statistics; Athens University Medical School; Athens; Greece
| | - C. Haida
- Department of Hygiene, Epidemiology and Medical Statistics; Athens University Medical School; Athens; Greece
| | - A. Hatzakis
- Department of Hygiene, Epidemiology and Medical Statistics; Athens University Medical School; Athens; Greece
| | - I.N. Boletis
- Department of Nephrology and Renal Transplantation Unit; “Laikon” Hospital; Athens University Medical School; Athens; Greece
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