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Guliy OI, Evstigneeva SS, Khanadeev VA, Dykman LA. Antibody Phage Display Technology for Sensor-Based Virus Detection: Current Status and Future Prospects. BIOSENSORS 2023; 13:640. [PMID: 37367005 DOI: 10.3390/bios13060640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/31/2023] [Accepted: 06/08/2023] [Indexed: 06/28/2023]
Abstract
Viruses are widespread in the environment, and many of them are major pathogens of serious plant, animal, and human diseases. The risk of pathogenicity, together with the capacity for constant mutation, emphasizes the need for measures to rapidly detect viruses. The need for highly sensitive bioanalytical methods to diagnose and monitor socially significant viral diseases has increased in the past few years. This is due, on the one hand, to the increased incidence of viral diseases in general (including the unprecedented spread of a new coronavirus infection, SARS-CoV-2), and, on the other hand, to the need to overcome the limitations of modern biomedical diagnostic methods. Phage display technology antibodies as nano-bio-engineered macromolecules can be used for sensor-based virus detection. This review analyzes the commonly used virus detection methods and approaches and shows the prospects for the use of antibodies prepared by phage display technology as sensing elements for sensor-based virus detection.
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Affiliation(s)
- Olga I Guliy
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Stella S Evstigneeva
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Vitaly A Khanadeev
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
| | - Lev A Dykman
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospect Entuziastov, Saratov 410049, Russia
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Fan L, Zhang L, Li J, Zhu F. Advances in the progress of monoclonal antibodies for rabies. Hum Vaccin Immunother 2022; 18:2026713. [PMID: 35172707 PMCID: PMC8993100 DOI: 10.1080/21645515.2022.2026713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Rabies is a highly fatal zoonotic disease caused by the rabies virus invading the central nervous system. When suspected of exposure to the rabies virus, post-exposure prophylaxis should be administered as soon as possible. Monoclonal antibodies (mAbs) neutralizing the rabies virus could be better in human rabies post-exposure prophylaxis than equine or human rabies immune globulin in terms of supply, cost, and efficacy. This article reviews anti-rabies mAbs produced by multiple techniques, and the results of clinical trials for anti-rabies mAbs cocktails recognizing non-overlapping epitopes are also discussed.
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Affiliation(s)
- Linlin Fan
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, PR China
| | - Li Zhang
- Vaccine Clinical Evaluation Department, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, PR China
| | - Jingxin Li
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, PR China.,Vaccine Clinical Evaluation Department, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, PR China.,Institute of Global Public Health and Emergency Pharmacy, China Pharmaceutical University, Nanjing, PR China
| | - Fengcai Zhu
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, PR China.,Institute of Global Public Health and Emergency Pharmacy, China Pharmaceutical University, Nanjing, PR China.,NHC Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, PR China
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3
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de Melo GD, Hellert J, Gupta R, Corti D, Bourhy H. Monoclonal antibodies against rabies: current uses in prophylaxis and in therapy. Curr Opin Virol 2022; 53:101204. [PMID: 35151116 DOI: 10.1016/j.coviro.2022.101204] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/11/2022] [Accepted: 01/15/2022] [Indexed: 12/25/2022]
Abstract
Rabies is a severe viral infection that causes an acute encephalomyelitis, which presents a case fatality of nearly 100% after the manifestation of neurological clinical signs. Rabies can be efficiently prevented with post-exposure prophylaxis (PEP), composed of vaccines and anti-rabies immunoglobulins (RIGs); however, no treatment exists for symptomatic rabies. The PEP protocol faces access and implementation obstacles in resource-limited settings, which could be partially overcome by substituting RIGs for monoclonal antibodies (mAbs). mAbs offer lower production costs, consistent supply availability, long-term storage/stability, and an improved safety profile. Here we summarize the key features of the different available mAbs against rabies, focusing on their application in PEP and highlighting their potential in a novel therapeutic approach.
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Affiliation(s)
- Guilherme Dias de Melo
- Institut Pasteur, Université de Paris, Lyssavirus Epidemiology and Neuropathology Unit, Paris, F-75015, France
| | - Jan Hellert
- Centre for Structural Systems Biology, Leibniz-Institut für Experimentelle Virologie (HPI), Notkestrasse 85, Hamburg, 22607, Germany
| | | | - Davide Corti
- Humabs Biomed SA, a Subsidiary of Vir Biotechnology, Bellinzona, Switzerland
| | - Hervé Bourhy
- Institut Pasteur, Université de Paris, Lyssavirus Epidemiology and Neuropathology Unit, Paris, F-75015, France; Institut Pasteur, Université de Paris, National Reference Center for Rabies, Paris, F-75015, France; Institut Pasteur, Université de Paris, WHO Collaborating Centre for Reference and Research on Rabies, Paris, F-75015, France.
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4
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Roth KDR, Wenzel EV, Ruschig M, Steinke S, Langreder N, Heine PA, Schneider KT, Ballmann R, Fühner V, Kuhn P, Schirrmann T, Frenzel A, Dübel S, Schubert M, Moreira GMSG, Bertoglio F, Russo G, Hust M. Developing Recombinant Antibodies by Phage Display Against Infectious Diseases and Toxins for Diagnostics and Therapy. Front Cell Infect Microbiol 2021; 11:697876. [PMID: 34307196 PMCID: PMC8294040 DOI: 10.3389/fcimb.2021.697876] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/21/2021] [Indexed: 12/30/2022] Open
Abstract
Antibodies are essential molecules for diagnosis and treatment of diseases caused by pathogens and their toxins. Antibodies were integrated in our medical repertoire against infectious diseases more than hundred years ago by using animal sera to treat tetanus and diphtheria. In these days, most developed therapeutic antibodies target cancer or autoimmune diseases. The COVID-19 pandemic was a reminder about the importance of antibodies for therapy against infectious diseases. While monoclonal antibodies could be generated by hybridoma technology since the 70ies of the former century, nowadays antibody phage display, among other display technologies, is robustly established to discover new human monoclonal antibodies. Phage display is an in vitro technology which confers the potential for generating antibodies from universal libraries against any conceivable molecule of sufficient size and omits the limitations of the immune systems. If convalescent patients or immunized/infected animals are available, it is possible to construct immune phage display libraries to select in vivo affinity-matured antibodies. A further advantage is the availability of the DNA sequence encoding the phage displayed antibody fragment, which is packaged in the phage particles. Therefore, the selected antibody fragments can be rapidly further engineered in any needed antibody format according to the requirements of the final application. In this review, we present an overview of phage display derived recombinant antibodies against bacterial, viral and eukaryotic pathogens, as well as microbial toxins, intended for diagnostic and therapeutic applications.
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Affiliation(s)
- Kristian Daniel Ralph Roth
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Esther Veronika Wenzel
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany.,Abcalis GmbH, Braunschweig, Germany
| | - Maximilian Ruschig
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Stephan Steinke
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Nora Langreder
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Philip Alexander Heine
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Kai-Thomas Schneider
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Rico Ballmann
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Viola Fühner
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | | | | | | | - Stefan Dübel
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany.,Abcalis GmbH, Braunschweig, Germany.,YUMAB GmbH, Braunschweig, Germany
| | - Maren Schubert
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | | | - Federico Bertoglio
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Giulio Russo
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany.,Abcalis GmbH, Braunschweig, Germany
| | - Michael Hust
- Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany.,YUMAB GmbH, Braunschweig, Germany
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Isolation and Characterization of Cross-Reactive Human Monoclonal Antibodies That Potently Neutralize Australian Bat Lyssavirus Variants and Other Phylogroup 1 Lyssaviruses. Viruses 2021; 13:v13030391. [PMID: 33804519 PMCID: PMC8001737 DOI: 10.3390/v13030391] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 12/12/2022] Open
Abstract
Australian bat lyssavirus (ABLV) is a rhabdovirus that circulates in four species of pteropid bats (ABLVp) and the yellow-bellied sheath-tailed bat (ABLVs) in mainland Australia. In the three confirmed human cases of ABLV, rabies illness preceded fatality. As with rabies virus (RABV), post-exposure prophylaxis (PEP) for potential ABLV infections consists of wound cleansing, administration of the rabies vaccine and injection of rabies immunoglobulin (RIG) proximal to the wound. Despite the efficacy of PEP, the inaccessibility of human RIG (HRIG) in the developing world and the high immunogenicity of equine RIG (ERIG) has led to consideration of human monoclonal antibodies (hmAbs) as a passive immunization option that offers enhanced safety and specificity. Using a recombinant vesicular stomatitis virus (rVSV) expressing the glycoprotein (G) protein of ABLVs and phage display, we identified two hmAbs, A6 and F11, which completely neutralize ABLVs/ABLVp, and RABV at concentrations ranging from 0.39 and 6.25 µg/mL and 0.19 and 0.39 µg/mL respectively. A6 and F11 recognize overlapping epitopes in the lyssavirus G protein, effectively neutralizing phylogroup 1 lyssaviruses, while having little effect on phylogroup 2 and non-grouped diverse lyssaviruses. These results suggest that A6 and F11 could be effective therapeutic and diagnostic tools for phylogroup 1 lyssavirus infections.
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Generation of a naïve human single chain variable fragment (scFv) library for the identification of monoclonal scFv against Salmonella Typhi Hemolysin E antigen. Toxicon 2016; 117:94-101. [DOI: 10.1016/j.toxicon.2016.04.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/30/2016] [Accepted: 04/12/2016] [Indexed: 12/29/2022]
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Kuhn P, Fühner V, Unkauf T, Moreira GMSG, Frenzel A, Miethe S, Hust M. Recombinant antibodies for diagnostics and therapy against pathogens and toxins generated by phage display. Proteomics Clin Appl 2016; 10:922-948. [PMID: 27198131 PMCID: PMC7168043 DOI: 10.1002/prca.201600002] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/30/2016] [Accepted: 05/17/2016] [Indexed: 12/11/2022]
Abstract
Antibodies are valuable molecules for the diagnostic and treatment of diseases caused by pathogens and toxins. Traditionally, these antibodies are generated by hybridoma technology. An alternative to hybridoma technology is the use of antibody phage display to generate recombinant antibodies. This in vitro technology circumvents the limitations of the immune system and allows—in theory—the generation of antibodies against all conceivable molecules. Phage display technology enables obtaining human antibodies from naïve antibody gene libraries when either patients are not available or immunization is not ethically feasible. On the other hand, if patients or immunized/infected animals are available, it is common to construct immune phage display libraries to select in vivo affinity‐matured antibodies. Because the phage packaged DNA sequence encoding the antibodies is directly available, the antibodies can be smoothly engineered according to the requirements of the final application. In this review, an overview of phage display derived recombinant antibodies against bacterial, viral, and eukaryotic pathogens as well as toxins for diagnostics and therapy is given.
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Affiliation(s)
- Philipp Kuhn
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany
| | - Viola Fühner
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany
| | - Tobias Unkauf
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany
| | | | - André Frenzel
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany.,YUMAB GmbH, Braunschweig, Germany
| | - Sebastian Miethe
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany
| | - Michael Hust
- Technische Universität Braunschweig, Institut für Biochemie, Biotechnologie und Bioinformatik, Abteilung Biotechnologie, Braunschweig, Germany.
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8
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Korimbocus J, Dehay N, Tordo N, Cano F, Morgeaux S. Development and validation of a quantitative competitive ELISA for potency testing of equine anti rabies sera with other potential use. Vaccine 2016; 34:3310-6. [DOI: 10.1016/j.vaccine.2016.04.086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/11/2016] [Accepted: 04/15/2016] [Indexed: 11/28/2022]
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9
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Böldicke T, Miethe S, Fühner V, Schirrmann T, Frenzel A, Hust M. Generation of Recombinant Antibodies Against Toxins and Viruses by Phage Display for Diagnostics and Therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 917:55-76. [PMID: 27236552 PMCID: PMC7121732 DOI: 10.1007/978-3-319-32805-8_4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Antibody phage display is an in vitro technology to generate recombinant antibodies. In particular for pathogens like viruses or toxins, antibody phage display is an alternative to hybridoma technology, since it circumvents the limitations of the immune system. Phage display allows the generation of human antibodies from naive antibody gene libraries when either immunized patients are not available or immunization is not ethically feasible. This technology also allows the construction of immune libraries to select in vivo affinity matured antibodies if immunized patients or animals are available.In this review, we describe the generation of human and human-like antibodies from naive antibody gene libraries and antibodies from immune antibody gene libraries. Furthermore, we give an overview about phage display derived recombinant antibodies against viruses and toxins for diagnostics and therapy.
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Affiliation(s)
- Thomas Böldicke
- grid.7490.aRecombinant protein exprsn/Intrabdy unit, Helmholtz-Centre for Infection Rese, Braunschweig, Germany
| | - Sebastian Miethe
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Spielmannstr. 7, 38106, Braunschweig, Germany
| | - Viola Fühner
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Spielmannstr. 7, 38106, Braunschweig, Germany
| | - Thomas Schirrmann
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Spielmannstr. 7, 38106, Braunschweig, Germany.,YUMAB GmbH, Rebenring 33, 38106, Braunschweig, Germany
| | - André Frenzel
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Spielmannstr. 7, 38106, Braunschweig, Germany.,YUMAB GmbH, Rebenring 33, 38106, Braunschweig, Germany
| | - Michael Hust
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Spielmannstr. 7, 38106, Braunschweig, Germany.
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Rupprecht CE, Nagarajan T, Ertl H. Current Status and Development of Vaccines and Other Biologics for Human Rabies Prevention. Expert Rev Vaccines 2016; 15:731-49. [PMID: 26796599 DOI: 10.1586/14760584.2016.1140040] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Rabies is a neglected viral zoonosis with the highest case fatality of any infectious disease. Pasteur's historical accomplishments during the late 19(th) century began the process of human vaccine development, continuing to evolve into the 21(st) century. Over the past 35 years, great improvements occurred in the production of potent tissue culture vaccines and the gradual removal from the market of unsafe nerve tissue products. Timely and appropriate administration of modern biologics virtually assures survivorship, even after severe exposures. Nevertheless, in the developing world, if not provided for free nationally, the cost of a single course of human prophylaxis exceeds the average monthly wage of the common worker. Beyond traditional approaches, recombinant, sub-unit and other novel methods are underway to improve the availability of safe, effective and more affordable rabies biologics.
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Liu Y, Sun L, Yu P, Li A, Li C, Tang Q, Li D, Liang M. Viral suppression function of intracellular antibody against C-terminal domain of rabies virus phosphoprotein. Acta Biochim Biophys Sin (Shanghai) 2015; 47:815-23. [PMID: 26188200 DOI: 10.1093/abbs/gmv060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 06/10/2015] [Indexed: 12/23/2022] Open
Abstract
Rabies virus (RV) causes a fatal disease in both human and animals. The disease can be prevented by post-exposure prophylaxis in individuals exposed to RV. However, the neutralization effect is limited after the virus enters into the host cells. So, it is important to identify new targets for rabies therapy. In this study, a human antibody RV1A2 specific to RV phosphoprotein (RV-P) was generated from a human naïve immune antibody library. The antibody recognized all forms of the phosphoproteins including the full length (P1) and short length of the P proteins (P2, P3, P4, and P5). The epitope mapping and the molecular docking of antigen-antibody complex showed that the antibody targets at a conserved epitope of 'VLGWV' ranging from amino acid (aa) 262 to 266 at C-terminal domain of the P protein, which locates at a hydrophobic pocket region in the C-terminal of the RV-P. The aa W265 within the epitope is on the flat surface of the domain, suggesting that it may be a critical amino acid for the functions of the P protein. Our results further showed that intracellular antibody RV1A2 which targets at the C-terminal domain of the P protein could effectively inhibit RV propagation 2-4 days post infection. These results suggest that the conserved C-terminal domain may be used as a new target for drug discovery, which highlights an intracellular inhibition of RV propagation and provides a potential novel way to treat RV infection.
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Affiliation(s)
- Yang Liu
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Lina Sun
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Pengcheng Yu
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Aqian Li
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Chuan Li
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Qing Tang
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Dexin Li
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
| | - Mifang Liang
- Key Laboratory for Medical Virology, NHFPC, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 102206, China
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