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Pliego Zamora A, Kim J, Vajjhala PR, Thygesen SJ, Watterson D, Modhiran N, Bielefeldt-Ohmann H, Stacey KJ. Kinetics of severe dengue virus infection and development of gut pathology in mice. J Virol 2023; 97:e0125123. [PMID: 37850747 PMCID: PMC10688336 DOI: 10.1128/jvi.01251-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 09/12/2023] [Indexed: 10/19/2023] Open
Abstract
IMPORTANCE Dengue virus, an arbovirus, causes an estimated 100 million symptomatic infections annually and is an increasing threat as the mosquito range expands with climate change. Dengue epidemics are a substantial strain on local economies and health infrastructure, and an understanding of what drives severe disease may enable treatments to help reduce hospitalizations. Factors exacerbating dengue disease are debated, but gut-related symptoms are much more frequent in severe than mild cases. Using mouse models of dengue infection, we have shown that inflammation and damage are earlier and more severe in the gut than in other tissues. Additionally, we observed impairment of the gut mucus layer and propose that breakdown of the barrier function exacerbates inflammation and promotes severe dengue disease. This idea is supported by recent data from human patients showing elevated bacteria-derived molecules in dengue patient serum. Therapies aiming to maintain gut integrity may help to abrogate severe dengue disease.
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Affiliation(s)
- Adriana Pliego Zamora
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Jaehyeon Kim
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Parimala R. Vajjhala
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Sara J. Thygesen
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Daniel Watterson
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, St Lucia, Queensland, Australia
| | - Naphak Modhiran
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Helle Bielefeldt-Ohmann
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, St Lucia, Queensland, Australia
| | - Katryn J. Stacey
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, St Lucia, Queensland, Australia
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2
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Lupu LM, Wiegand P, Holdschick D, Mihoc D, Maeser S, Rawer S, Völklein F, Malek E, Barka F, Knauer S, Uth C, Hennermann J, Kleinekofort W, Hahn A, Barka G, Przybylski M. Identification and Affinity Determination of Protein-Antibody and Protein-Aptamer Epitopes by Biosensor-Mass Spectrometry Combination. Int J Mol Sci 2021; 22:12832. [PMID: 34884636 PMCID: PMC8657952 DOI: 10.3390/ijms222312832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 12/24/2022] Open
Abstract
Analytical methods for molecular characterization of diagnostic or therapeutic targets have recently gained high interest. This review summarizes the combination of mass spectrometry and surface plasmon resonance (SPR) biosensor analysis for identification and affinity determination of protein interactions with antibodies and DNA-aptamers. The binding constant (KD) of a protein-antibody complex is first determined by immobilizing an antibody or DNA-aptamer on an SPR chip. A proteolytic peptide mixture is then applied to the chip, and following removal of unbound material by washing, the epitope(s) peptide(s) are eluted and identified by MALDI-MS. The SPR-MS combination was applied to a wide range of affinity pairs. Distinct epitope peptides were identified for the cardiac biomarker myoglobin (MG) both from monoclonal and polyclonal antibodies, and binding constants determined for equine and human MG provided molecular assessment of cross immunoreactivities. Mass spectrometric epitope identifications were obtained for linear, as well as for assembled ("conformational") antibody epitopes, e.g., for the polypeptide chemokine Interleukin-8. Immobilization using protein G substantially improved surface fixation and antibody stabilities for epitope identification and affinity determination. Moreover, epitopes were successfully determined for polyclonal antibodies from biological material, such as from patient antisera upon enzyme replacement therapy of lysosomal diseases. The SPR-MS combination was also successfully applied to identify linear and assembled epitopes for DNA-aptamer interaction complexes of the tumor diagnostic protein C-Met. In summary, the SPR-MS combination has been established as a powerful molecular tool for identification of protein interaction epitopes.
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Affiliation(s)
- Loredana-Mirela Lupu
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Pascal Wiegand
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Daria Holdschick
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Delia Mihoc
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Stefan Maeser
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Stephan Rawer
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Friedemann Völklein
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Ebrahim Malek
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Frederik Barka
- Sunchrom GmbH, Industriestr. 18, 61381 Friedrichsdorf, Germany; (F.B.); (G.B.)
| | - Sascha Knauer
- Sulfotools GmbH, Bahnhofsplatz 1, 65428 Rüsselsheim am Main, Germany; (S.K.); (C.U.)
| | - Christina Uth
- Sulfotools GmbH, Bahnhofsplatz 1, 65428 Rüsselsheim am Main, Germany; (S.K.); (C.U.)
| | - Julia Hennermann
- Department of Pediatrics, Universitätsmedizin Mainz, 55130 Mainz, Germany;
| | - Wolfgang Kleinekofort
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Andreas Hahn
- Department of Child Neurology, Justus-Liebig-University Giessen, Feulgenstraße 10-12, 35389 Giessen, Germany;
| | - Günes Barka
- Sunchrom GmbH, Industriestr. 18, 61381 Friedrichsdorf, Germany; (F.B.); (G.B.)
| | - Michael Przybylski
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
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3
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Xisto MF, Prates JWO, Dias IM, Dias RS, da Silva CC, de Paula SO. NS1 Recombinant Proteins Are Efficiently Produced in Pichia pastoris and Have Great Potential for Use in Diagnostic Kits for Dengue Virus Infections. Diagnostics (Basel) 2020; 10:E379. [PMID: 32517281 PMCID: PMC7345099 DOI: 10.3390/diagnostics10060379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/26/2020] [Accepted: 06/04/2020] [Indexed: 12/24/2022] Open
Abstract
Dengue is one of the major diseases causing global public health concerns. Despite technological advances in vaccine production against all its serotypes, it is estimated that the dengue virus is responsible for approximately 390 million infections per year. Laboratory diagnosis has been the key point for the correct treatment and prevention of this disease. Currently, the limiting factor in the manufacture of dengue diagnostic kits is the large-scale production of the non-structural 1 (NS1) antigen used in the capture of the antibody present in the infected patients' serum. In this work, we demonstrate the production of the non-structural 1 protein of dengue virus (DENV) serotypes 1-4 (NS1-DENV1, NS1-DENV2, NS1-DENV3, and NS1-DENV4) in the methylotrophic yeast Pichia pastoris KM71H. Secreted recombinant protein was purified by affinity chromatography and characterized by SDS-PAGE and ELISA. The objectives of this study were achieved, and the results showed that P. pastoris is a good heterologous host and worked well in the production of NS1DENV 1-4 recombinant proteins. Easy to grow and quick to obtain, this yeast secreted ready-to-use proteins, with a final yield estimated at 2.8-4.6 milligrams per liter of culture. We reached 85-91% sensitivity and 91-93% specificity using IgM as a target, and for anti-dengue IgG, 83-87% sensitivity and 81-93% specificity were achieved. In this work, we conclude that the NS1 recombinant proteins are efficiently produced in P. pastoris and have great potential for use in diagnostic kits for dengue virus infections. The transformed yeast obtained can be used for production in industrial-scale bioreactors.
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Affiliation(s)
- Mariana Fonseca Xisto
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (M.F.X.); (I.M.D.); (R.S.D.)
| | - John Willians Oliveira Prates
- Department of Microbiology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (J.W.O.P.); (C.C.d.S.)
| | - Ingrid Marques Dias
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (M.F.X.); (I.M.D.); (R.S.D.)
| | - Roberto Sousa Dias
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (M.F.X.); (I.M.D.); (R.S.D.)
| | - Cynthia Canedo da Silva
- Department of Microbiology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (J.W.O.P.); (C.C.d.S.)
| | - Sérgio Oliveira de Paula
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-900, Brazil; (M.F.X.); (I.M.D.); (R.S.D.)
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Chesnut M, Muñoz LS, Harris G, Freeman D, Gama L, Pardo CA, Pamies D. In vitro and in silico Models to Study Mosquito-Borne Flavivirus Neuropathogenesis, Prevention, and Treatment. Front Cell Infect Microbiol 2019; 9:223. [PMID: 31338335 PMCID: PMC6629778 DOI: 10.3389/fcimb.2019.00223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/11/2019] [Indexed: 01/07/2023] Open
Abstract
Mosquito-borne flaviviruses can cause disease in the nervous system, resulting in a significant burden of morbidity and mortality. Disease models are necessary to understand neuropathogenesis and identify potential therapeutics and vaccines. Non-human primates have been used extensively but present major challenges. Advances have also been made toward the development of humanized mouse models, but these models still do not fully represent human pathophysiology. Recent developments in stem cell technology and cell culture techniques have allowed the development of more physiologically relevant human cell-based models. In silico modeling has also allowed researchers to identify and predict transmission patterns and discover potential vaccine and therapeutic candidates. This review summarizes the research on in vitro and in silico models used to study three mosquito-borne flaviviruses that cause neurological disease in humans: West Nile, Dengue, and Zika. We also propose a roadmap for 21st century research on mosquito-borne flavivirus neuropathogenesis, prevention, and treatment.
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Affiliation(s)
- Megan Chesnut
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Laura S. Muñoz
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Georgina Harris
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Dana Freeman
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Lucio Gama
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, MD, United States
| | - Carlos A. Pardo
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - David Pamies
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
- Department of Physiology, University of Lausanne, Lausanne, Switzerland
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5
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Stan RC, Françoso KS, Alves RPS, Ferreira LCS, Soares IS, de Camargo MM. Febrile temperatures increase in vitro antibody affinity for malarial and dengue antigens. PLoS Negl Trop Dis 2019; 13:e0007239. [PMID: 30943193 PMCID: PMC6464238 DOI: 10.1371/journal.pntd.0007239] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 04/15/2019] [Accepted: 02/12/2019] [Indexed: 01/03/2023] Open
Abstract
Fever is a regulated increase of the body temperature resulting from both infectious and non-infectious causes. Fever is known to play a role in modulating immune responses to infection, but the potential of febrile temperatures in regulating antigen binding affinity to antibodies has not been explored. Here we investigated this process under in vitro conditions using Isothermal titration calorimetry and ELISA. We used selected malarial and dengue antigens against specific monoclonal antibodies, and observed a marked increase in the affinity of these antibody-antigen complexes at 40°C, compared to physiological (37°C) or pathophysiological temperatures (42°C). Induced thermal equilibration of the protein partners at these temperatures in vitro, prior to measurements, further increased their binding affinity. These results suggest another positive and adaptive role for fever in vivo, and highlight the favourable role of thermal priming in enhancing protein-protein affinity for samples with limited availability.
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Affiliation(s)
- Razvan C. Stan
- Department of Immunology, Institute for Biomedical Sciences, University of São Paulo, Brazil
| | - Katia S. Françoso
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, Brazil
| | - Rubens P. S. Alves
- Department of Microbiology, Institute for Biomedical Sciences, University of São Paulo, Brazil
| | - Luís Carlos S. Ferreira
- Department of Microbiology, Institute for Biomedical Sciences, University of São Paulo, Brazil
| | - Irene S. Soares
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, Brazil
| | - Maristela M. de Camargo
- Department of Immunology, Institute for Biomedical Sciences, University of São Paulo, Brazil
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6
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Rathore AS, Sarker A, Gupta RD. Designing antibody against highly conserved region of dengue envelope protein by in silico screening of scFv mutant library. PLoS One 2019; 14:e0209576. [PMID: 30629625 PMCID: PMC6328183 DOI: 10.1371/journal.pone.0209576] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 12/07/2018] [Indexed: 02/08/2023] Open
Abstract
Dengue being one of the deadliest diseases of tropical regions, enforces to put continuous efforts for the development of vaccine and effective therapeutics. Most of the antibodies generated during dengue infection are non-neutralizing and cause antibody dependent enhancement. Hence, making a potent neutralizing antibody against all four dengue serotypes could be very effective for the treatment. However, designing a single antibody for all serotypes is difficult due to variation in protein sequences. Therefore, the objective is to identify conserved region of dengue envelope protein and then develop an antibody against that conserved region. Before advancing to the development of such an antibody, it is desirable to validate the interactions between antibody and dengue envelope protein. In silico analysis of such interactions provides a good platform to find out a suitable region to design and construct an antibody against it by analyzing antigen-antibody interaction before synthesizing the antibody. In this study, two highly conserved regions of dengue envelope protein were identified and an scFv was constructed against it. Both scFv and FuBc proteins were expressed in bacterial expression system and binding efficiency was analyzed by SPR analysis with KD value 2.3 μM. In order to improve binding efficiency, an in silico scFv mutant library was created which was virtually screened for higher binding efficiency. Six mutants with high binding efficiency were selected for further analysis. The binding ability of these mutants were predicted using simulation analysis which shows these mutations were stabilizing scFv-FuBc complex.
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Affiliation(s)
| | - Animesh Sarker
- Faculty of Life Sciences and Biotechnology, South Asian University, New Delhi, India
| | - Rinkoo Devi Gupta
- Faculty of Life Sciences and Biotechnology, South Asian University, New Delhi, India
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7
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Computational Prediction of the Epitopes of HA1 Protein of Influenza Viruses to its Neutralizing Antibodies. Antibodies (Basel) 2018; 8:antib8010002. [PMID: 31544808 PMCID: PMC6640696 DOI: 10.3390/antib8010002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/11/2018] [Accepted: 12/19/2018] [Indexed: 11/17/2022] Open
Abstract
In this work, we have used a new method to predict the epitopes of HA1 protein of influenza virus to several antibodies HC19, CR9114, BH151 and 4F5. While our results reproduced the binding epitopes of H3N2 or H5N1 for the neutralizing antibodies HC19, CR9114, and BH151 as revealed from the available crystal structures, additional epitopes for these antibodies were also suggested. Moreover, the predicted epitopes of H5N1 HA1 for the newly developed antibody 4F5 are located at the receptor binding domain, while previous study identified a region 76-WLLGNP-81 as the epitope. The possibility of antibody recognition of influenza virus via different mechanism by binding to different epitopes of an antigen is also discussed.
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8
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Guo C, Zhang H, Xie X, Liu Y, Sun L, Li H, Yu P, Hu H, Sun J, Li Y, Feng Q, Zhao X, Liang D, Wang Z, Hu J. H1N1 influenza virus epitopes classified by monoclonal antibodies. Exp Ther Med 2018; 16:2001-2007. [PMID: 30186431 PMCID: PMC6122413 DOI: 10.3892/etm.2018.6429] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 06/22/2018] [Indexed: 12/26/2022] Open
Abstract
Epitopes serve an important role in influenza infection. It may be useful to screen universal influenza virus vaccines, analyzing the epitopes of multiple subtypes of the hemagglutinin (HA) protein. A total of 40 monoclonal antibodies (mAbs) previously obtained from flu virus HA antigens (development and characterization of 40 mAbs generated using H1N1 influenza virus split vaccines were previously published) were used to detect and classify mAbs into distinct flu virus sub-categories using the ELISA method. Following this, the common continuous amino acid sequences were identified by multiple sequence alignment analysis with the GenBank database and DNAMAN software, for use in predicting the epitopes of the HA protein. Synthesized peptides of these common sequences were prepared, and used to verify and determine the predicted linear epitopes through localization and distribution analyses. With these methods, nine HA linear epitopes distributed among different strains of influenza virus were identified, which included three from influenza A, four from 2009 H1N1 and seasonal influenza, and two from H1. The present study showed that considering a combination of the antigen-antibody reaction specificity, variation in the influenza virus HA protein and linear epitopes may present a useful approach for designing effective multi-epitope vaccines. Furthermore, the study aimed to clarify the cause and pathogenic mechanism of influenza virus HA-induced flu, and presents a novel idea for identifying the epitopes of other pathogenic microorganisms.
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Affiliation(s)
- Chunyan Guo
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Haixiang Zhang
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Xin Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
| | - Yang Liu
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Lijun Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Huijin Li
- Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China
| | - Pengbo Yu
- Center of Shaanxi Provincial Disease Control and Prevention, Institute of Viral Diseases, Xi'an, Shaanxi 710052, P.R. China
| | - Hanyu Hu
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Jingying Sun
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Yuan Li
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Qing Feng
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Xiangrong Zhao
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Daoyan Liang
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Zhen Wang
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Jun Hu
- Central Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
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9
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Tan X, Liu N, Legge FS, Yang M, Zeng J. Computational identification of antibody epitopes of human papillomavirus 16 (HPV16) L1 proteins. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2018. [DOI: 10.1142/s0219633618500177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Previously, we developed a method to predict epitopes on a protein recognized by specific antibodies. In this study, we have applied this method to identify the epitopes of the human papillomavirus 16 (HPV16) L1 capsomer that is bound by monoclonal antibodies U4, AE3 and AG7. Initially, the method was validated by the identification of epitopes of HPV16 L1 capsomer that bind to antibody U4. Our predicted epitopes were in agreement with the cryto-electron microscopy (cryto-EM) structure of the complex. The method was then used to predict the epitopes of HPV16 L1 binding of antibodies AE3 and AG7. Our calculations indicated that antibody AE3 binds to the HPV16 L1 capsomer at two different regions. Firstly, the region recognized by antibody U4 and secondly, the region recognized by antibody V5, which have been shown in the cryto-EM structure of the V5 and HPV16 L1 complex. In comparison, the antibody AG7 binds to the capsomer only at the epitopes bound by antibody U4. Therefore, antibody AE3 is predicted to have higher affinity than antibody AG7 and could be used for developing highly efficient anti-HPV monoclonal antibodies in the clinical treatment of HPV infections.
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Affiliation(s)
- Xin Tan
- Department of Obstetrics and Gynecology, West China Second University Hospital, Chengdu 610041, P. R. China
- Key Laboratory of Birth Defects and Related, Diseases of Women and Children, Sichuan University Ministry of Education, Chengdu 610041, P. R. China
| | - Na Liu
- Key Laboratory of Magnetic Resonance in Biological Systems, National Center for Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Fiona S. Legge
- MedChemSoft Solutions Wheelers Hill, VIC 3150, Australia
| | - Minghui Yang
- Key Laboratory of Magnetic Resonance in Biological Systems, National Center for Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China
| | - Jun Zeng
- MedChemSoft Solutions Wheelers Hill, VIC 3150, Australia
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10
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Rocha LB, Alves RPDS, Caetano BA, Pereira LR, Mitsunari T, Amorim JH, Polatto JM, Botosso VF, Gallina NMF, Palacios R, Precioso AR, Granato CFH, Oliveira DBL, Silveira VBD, Luz D, Ferreira LCDS, Piazza RMF. Epitope Sequences in Dengue Virus NS1 Protein Identified by Monoclonal Antibodies. Antibodies (Basel) 2017; 6:antib6040014. [PMID: 31548529 PMCID: PMC6698852 DOI: 10.3390/antib6040014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 11/17/2022] Open
Abstract
Dengue nonstructural protein 1 (NS1) is a multi-functional glycoprotein with essential functions both in viral replication and modulation of host innate immune responses. NS1 has been established as a good surrogate marker for infection. In the present study, we generated four anti-NS1 monoclonal antibodies against recombinant NS1 protein from dengue virus serotype 2 (DENV2), which were used to map three NS1 epitopes. The sequence 193AVHADMGYWIESALNDT209 was recognized by monoclonal antibodies 2H5 and 4H1BC, which also cross-reacted with Zika virus (ZIKV) protein. On the other hand, the sequence 25VHTWTEQYKFQPES38 was recognized by mAb 4F6 that did not cross react with ZIKV. Lastly, a previously unidentified DENV2 NS1-specific epitope, represented by the sequence 127ELHNQTFLIDGPETAEC143, is described in the present study after reaction with mAb 4H2, which also did not cross react with ZIKV. The selection and characterization of the epitope, specificity of anti-NS1 mAbs, may contribute to the development of diagnostic tools able to differentiate DENV and ZIKV infections.
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Affiliation(s)
| | - Rubens Prince Dos Santos Alves
- Laboratório de Desenvolvimento de Vacinas, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| | - Bruna Alves Caetano
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, 05503-900 SP, Brazil.
| | - Lennon Ramos Pereira
- Laboratório de Desenvolvimento de Vacinas, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| | - Thais Mitsunari
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, 05503-900 SP, Brazil.
| | - Jaime Henrique Amorim
- Laboratório de Desenvolvimento de Vacinas, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| | | | | | | | - Ricardo Palacios
- Divisão de Ensaios Clínicos e Farmacovigilância, Instituto Butantan, São Paulo, 05503-900, SP, Brazil.
| | | | - Celso Francisco Hernandes Granato
- Departamento de Medicina, Disciplina de Doenças Infecciosas e Parasitárias, Universidade Federal de São Paulo, São Paulo, 04023-062, SP, Brazil.
| | - Danielle Bruna Leal Oliveira
- Laboratório de Virologia Molecular e Clínica, Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| | - Vanessa Barbosa da Silveira
- Laboratório de Virologia Molecular e Clínica, Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| | - Daniela Luz
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, 05503-900 SP, Brazil.
| | - Luís Carlos de Souza Ferreira
- Laboratório de Desenvolvimento de Vacinas, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
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Lebani K, Jones ML, Watterson D, Ranzoni A, Traves RJ, Young PR, Mahler SM. Isolation of serotype-specific antibodies against dengue virus non-structural protein 1 using phage display and application in a multiplexed serotyping assay. PLoS One 2017; 12:e0180669. [PMID: 28683141 PMCID: PMC5500353 DOI: 10.1371/journal.pone.0180669] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 06/19/2017] [Indexed: 01/01/2023] Open
Abstract
The multidimensional nature of dengue virus (DENV) infections, which can be caused by four distinct serotypes of the virus, complicates the sensitivity of assays designed for the diagnosis of infection. Different viral markers can be optimally detected at different stages of infection. Of particular clinical importance is the early identification of infection, which is pivotal for disease management and the development of blood screening assays. Non-structural protein 1 (NS1) is an early surrogate marker of infection and its detection in serum coincides with detectable viraemia. The aim of this work was to isolate and characterise serotype-specific monoclonal antibodies that bind to NS1 for each of the four DENV serotypes. This was achieved using phage display and a subtractive biopanning strategy to direct the antibody selection towards serotype-specific epitopes. This antibody isolation strategy has advantages over immunisation techniques where it is difficult to avoid antibody responses to cross-reactive, immunodominant epitopes. Serotype specificity to recombinant antigen for each of the antibodies was confirmed by Enzyme Linked Immunosorbent Assay (ELISA) and Surface Plasmon Resonance. Confirmation of binding to native DENV NS1 was achieved using ELISA and immunofluorescence assay on DENV infected Vero cells. No cross-reactivity with Zika or Kunjin viruses was observed. A previously isolated pan-reactive antibody that binds to an immunodominant epitope was able to pair with each of the serotype-specific antibodies in a sandwich ELISA, indicating that the serotype specific antibodies bind to epitopes which are all spatially distinct from the immunodominant epitope. These antibodies were suitable for use in a multiplexed assay for simultaneous detection and serotyping of DENV NS1 in human serum. This work demonstrates that phage display coupled with novel biopanning strategies is a valuable in vitro methodology for isolation of binders that can discern amongst antigens with high homology for diagnostic applicability.
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Affiliation(s)
- Kebaneilwe Lebani
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, Australia
| | - Martina L. Jones
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, Australia
- ARC Training Centre for Biopharmaceutical Innovation, The University of Queensland, Brisbane, Queensland, Australia
- * E-mail:
| | - Daniel Watterson
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Andrea Ranzoni
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Renee J. Traves
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Paul R. Young
- ARC Training Centre for Biopharmaceutical Innovation, The University of Queensland, Brisbane, Queensland, Australia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Stephen M. Mahler
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, Australia
- ARC Training Centre for Biopharmaceutical Innovation, The University of Queensland, Brisbane, Queensland, Australia
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