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Quintero-Campos P, Gozalbo-Rovira R, Rodríguez-Díaz J, Maquieira Á, Morais S. Standardizing In Vitro β-Lactam Antibiotic Allergy Testing with Synthetic IgE. Anal Chem 2023; 95:12113-12121. [PMID: 37545056 PMCID: PMC10859892 DOI: 10.1021/acs.analchem.3c02284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 07/26/2023] [Indexed: 08/08/2023]
Abstract
The global prevalence of β-lactam allergy poses a major challenge in administering first-line antibiotics, such as penicillins, to a significant portion of the population. The lack of β-lactam IgE antibody pools with defined selectivity hampers the standardization and validation of in vitro assays for β-lactam allergy testing. To address this limitation, this study introduces a synthetic IgE specific to β-lactam antibiotics as a valuable tool for drug allergy research and diagnostic tests. Using phage display technology, we constructed a library of human single-chain antibody fragments (scFv) to target the primary determinant of amoxicillin, a widely used β-lactam antibiotic. Subsequently, we produced a complete human synthetic IgE molecule using the highly efficient baculovirus expression vector system. This synthetic IgE molecule served as a standard in an in vitro chemiluminescence immunoassay for β-lactam antibiotic allergy testing. Our results demonstrated a detection limit of 0.05 IU/mL (0.63 pM), excellent specificity (100%), and a four-fold higher clinical sensitivity (73%) compared to the in vitro reference assay when testing a cohort of 150 serum samples. These findings have significant implications for reliable interlaboratory comparison studies, accurate labeling of allergic patients, and combating the global public health threat of antimicrobial resistance. Furthermore, by serving as a valuable trueness control material, the synthetic IgE facilitates the standardization of diagnostic tests for β-lactam allergy and demonstrates the potential of utilizing this synthetic strategy as a promising approach for generating reference materials in drug allergy research and diagnostics.
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Affiliation(s)
- Pedro Quintero-Campos
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica
de València-Universitat de València, 46022 Valencia, Spain
| | - Roberto Gozalbo-Rovira
- Departamento
de Microbiología, Facultad de Medicina, Universidad de València, Av. Blasco Ibáñez 17, 46010 València, Spain
- Hospital
Clínico Universitario de Valencia, Instituto de Investigación INCLIVA, 46010 Valencia, Spain
| | - Jesús Rodríguez-Díaz
- Departamento
de Microbiología, Facultad de Medicina, Universidad de València, Av. Blasco Ibáñez 17, 46010 València, Spain
- Hospital
Clínico Universitario de Valencia, Instituto de Investigación INCLIVA, 46010 Valencia, Spain
| | - Ángel Maquieira
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica
de València-Universitat de València, 46022 Valencia, Spain
- Unidad
Mixta UPV-La Fe, Nanomedicine and Sensors, IIS La Fe, Av. de Fernando Abril Martorell,
106, 46026 València, Spain
- Departamento
de Química, Universitat Politècnica
de València, Camino
de Vera s/n, 46022 Valencia, Spain
| | - Sergi Morais
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica
de València-Universitat de València, 46022 Valencia, Spain
- Unidad
Mixta UPV-La Fe, Nanomedicine and Sensors, IIS La Fe, Av. de Fernando Abril Martorell,
106, 46026 València, Spain
- Departamento
de Química, Universitat Politècnica
de València, Camino
de Vera s/n, 46022 Valencia, Spain
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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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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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Chan SK, Rahumatullah A, Lai JY, Lim TS. Naïve Human Antibody Libraries for Infectious Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1053:35-59. [PMID: 29549634 PMCID: PMC7120739 DOI: 10.1007/978-3-319-72077-7_3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Many countries are facing an uphill battle in combating the spread of infectious diseases. The constant evolution of microorganisms magnifies the problem as it facilitates the re-emergence of old infectious diseases as well as promote the introduction of new and more deadly variants. Evidently, infectious diseases have contributed to an alarming rate of mortality worldwide making it a growing concern. Historically, antibodies have been used successfully to prevent and treat infectious diseases since the nineteenth century using antisera collected from immunized animals. The inherent ability of antibodies to trigger effector mechanisms aids the immune system to fight off pathogens that invades the host. Immune libraries have always been an important source of antibodies for infectious diseases due to the skewed repertoire generated post infection. Even so, the role and ability of naïve antibody libraries should not be underestimated. The naïve repertoire has its own unique advantages in generating antibodies against target antigens. This chapter will highlight the concept, advantages and application of human naïve libraries as a source to isolate antibodies against infectious disease target antigens.
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Affiliation(s)
- Soo Khim Chan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Anizah Rahumatullah
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Jing Yi Lai
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Theam Soon Lim
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Minden, Penang, Malaysia.
- Analytical Biochemistry Research Centre, Universiti Sains Malaysia, Minden, 11800, Penang, Malaysia.
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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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7
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Malik YS, Kumar N, Sharma K, Ghosh S, Bányai K, Balasubramanian G, Kobayashi N, Matthijnssens J. Molecular analysis of non structural rotavirus group A enterotoxin gene of bovine origin from India. INFECTION GENETICS AND EVOLUTION 2014; 25:20-7. [DOI: 10.1016/j.meegid.2014.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 04/01/2014] [Accepted: 04/04/2014] [Indexed: 11/15/2022]
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8
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Optimization and modification of anti-rhTNF-α single chain variable fragment antibody: Effective in vitro affinity maturation and functional expression of chimeric Fab. Biomed Pharmacother 2013; 67:437-44. [DOI: 10.1016/j.biopha.2013.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 02/04/2013] [Indexed: 11/21/2022] Open
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The first human epitope map of the alphaviral E1 and E2 proteins reveals a new E2 epitope with significant virus neutralizing activity. PLoS Negl Trop Dis 2010; 4:e739. [PMID: 20644615 PMCID: PMC2903468 DOI: 10.1371/journal.pntd.0000739] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Accepted: 05/25/2010] [Indexed: 01/02/2023] Open
Abstract
Background Venezuelan equine encephalitis virus (VEEV) is responsible for VEE epidemics that occur in South and Central America and the U.S. The VEEV envelope contains two glycoproteins E1 (mediates cell membrane fusion) and E2 (binds receptor and elicits virus neutralizing antibodies). Previously we constructed E1 and E2 epitope maps using murine monoclonal antibodies (mMAbs). Six E2 epitopes (E2c,d,e,f,g,h) bound VEEV-neutralizing antibody and mapped to amino acids (aa) 182–207. Nothing is known about the human antibody repertoire to VEEV or epitopes that engage human virus-neutralizing antibodies. There is no specific treatment for VEE; however virus-neutralizing mMAbs are potent protective and therapeutic agents for mice challenged with VEEV by either peripheral or aerosol routes. Therefore, fully human MAbs (hMAbs) with virus-neutralizing activity should be useful for prevention or clinical treatment of human VEE. Methods We used phage-display to isolate VEEV-specific hFabs from human bone marrow donors. These hFabs were characterized by sequencing, specificity testing, VEEV subtype cross-reactivity using indirect ELISA, and in vitro virus neutralization capacity. One E2-specific neutralizing hFAb, F5n, was converted into IgG, and its binding site was identified using competitive ELISA with mMAbs and by preparing and sequencing antibody neutralization-escape variants. Findings Using 11 VEEV-reactive hFabs we constructed the first human epitope map for the alphaviral surface proteins E1 and E2. We identified an important neutralization-associated epitope unique to the human immune response, E2 aa115–119. Using a 9 Å resolution cryo-electron microscopy map of the Sindbis virus E2 protein, we showed the probable surface location of this human VEEV epitope. Conclusions The VEEV-neutralizing capacity of the hMAb F5 nIgG is similar to that exhibited by the humanized mMAb Hy4 IgG. The Hy4 IgG has been shown to limit VEEV infection in mice both prophylactically and therapeutically. Administration of a cocktail of F5n and Hy4 IgGs, which bind to different E2 epitopes, could provide enhanced prophylaxis or immunotherapy for VEEV, while reducing the possibility of generating possibly harmful virus neutralization-escape variants in vivo. Although the murine immune response to Venezuelan equine encephalitis virus (VEEV) is well-characterized, little is known about the human antibody response to VEEV. In this study we used phage display technology to isolate a panel of 11 VEEV-specfic Fabs from two human donors. Seven E2-specific and four E1-specific Fabs were identified and mapped to five E2 epitopes and three E1 epitopes. Two neutralizing Fabs were isolated, E2-specific F5 and E1-specific L1A7, although the neutralizing capacity of L1A7 was 300-fold lower than F5. F5 Fab was expressed as a complete IgG1 molecule, F5 native (n) IgG. Neutralization-escape VEEV variants for F5 nIgG were isolated and their structural genes were sequenced to determine the theoretical binding site of F5. Based on this sequence analysis as well as the ability of F5 to neutralize four neutralization-escape variants of anti-VEEV murine monoclonal antibodies (mapped to E2 amino acids 182–207), a unique neutralization domain on E2 was identified and mapped to E2 amino acids 115–119.
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Kirsch MI, Hülseweh B, Nacke C, Rülker T, Schirrmann T, Marschall HJ, Hust M, Dübel S. Development of human antibody fragments using antibody phage display for the detection and diagnosis of Venezuelan equine encephalitis virus (VEEV). BMC Biotechnol 2008; 8:66. [PMID: 18764933 PMCID: PMC2543005 DOI: 10.1186/1472-6750-8-66] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2007] [Accepted: 09/02/2008] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Venezuelan equine encephalitis virus (VEEV) belongs to the Alphavirus group. Several species of this family are also pathogenic to humans and are recognized as potential agents of biological warfare and terrorism. The objective of this work was the generation of recombinant antibodies for the detection of VEEV after a potential bioterrorism assault or an natural outbreak of VEEV. RESULTS In this work, human anti-VEEV single chain Fragments variable (scFv) were isolated for the first time from a human naïve antibody gene library using optimized selection processes. In total eleven different scFvs were identified and their immunological specificity was assessed. The specific detection of the VEEV strains TC83, H12/93 and 230 by the selected antibody fragments was proved. Active as well as formalin inactivated virus particles were recognized by the selected antibody fragments which could be also used for Western blot analysis of VEEV proteins and immunohistochemistry of VEEV infected cells. The anti-VEEV scFv phage clones did not show any cross-reactivity with Alphavirus species of the Western equine encephalitis virus (WEEV) and Eastern equine encephalitis virus (EEEV) antigenic complex, nor did they react with Chikungunya virus (CHIKV), if they were used as detection reagent. CONCLUSION For the first time, this study describes the selection of antibodies against a human pathogenic virus from a human naïve scFv antibody gene library using complete, active virus particles as antigen. The broad and sensitive applicability of scFv-presenting phage for the immunological detection and diagnosis of Alphavirus species was demonstrated. The selected antibody fragments will improve the fast identification of VEEV in case of a biological warfare or terroristic attack or a natural outbreak.
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Affiliation(s)
- Martina Inga Kirsch
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
| | - Birgit Hülseweh
- Armed Forces Scientific Institute for Protection Technologies – NBC Protection (WIS), Humboldtstraße 1, 29633, Munster, Germany
| | - Christoph Nacke
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
| | - Torsten Rülker
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
| | - Thomas Schirrmann
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
| | - Hans-Jürgen Marschall
- Armed Forces Scientific Institute for Protection Technologies – NBC Protection (WIS), Humboldtstraße 1, 29633, Munster, Germany
| | - Michael Hust
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
| | - Stefan Dübel
- Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Spielmannstraβe 7, 38106, Braunschweig, Germany
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Soykut EA, Dudak FC, Boyaci IH. Selection of staphylococcal enterotoxin B (SEB)-binding peptide using phage display technology. Biochem Biophys Res Commun 2008; 370:104-8. [PMID: 18359289 PMCID: PMC7117543 DOI: 10.1016/j.bbrc.2008.03.065] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2008] [Accepted: 03/08/2008] [Indexed: 11/17/2022]
Abstract
In this study, peptides were selected to recognize staphylococcal enterotoxin B (SEB) which cause food intoxication and can be used as a biological war agent. By using commercial M13 phage library, single plaque isolation of 38 phages was done and binding affinities were investigated with phage-ELISA. The specificities of the selected phage clones showing high affinity to SEB were checked by using different protein molecules which can be found in food samples. Furthermore, the affinities of three selected phage clones were determined by using surface plasmon resonance (SPR) sensors. Sequence analysis was realized for three peptides showing high binding affinity to SEB and WWRPLTPESPPA, MNLHDYHRLFWY, and QHPQINQTLYRM amino acid sequences were obtained. The peptide sequence with highest affinity to SEB was synthesized with solid phase peptide synthesis technique and thermodynamic constants of the peptide-SEB interaction were determined by using isothermal titration calorimetry (ITC) and compared with those of antibody-SEB interaction. The binding constant of the peptide was determined as 4.2+/-0.7 x 10(5)M(-1) which indicates a strong binding close to that of antibody.
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Affiliation(s)
- Esra Acar Soykut
- Department of Food Engineering, Hacettepe University, Beytepe 06532, Ankara, Turkey
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Wu S, Ke A, Doudna JA. A fast and efficient procedure to produce scFvs specific for large macromolecular complexes. J Immunol Methods 2006; 318:95-101. [PMID: 17126854 PMCID: PMC2920608 DOI: 10.1016/j.jim.2006.10.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 09/30/2006] [Accepted: 10/04/2006] [Indexed: 10/23/2022]
Abstract
We have expanded the application of antibody phage display to a new type of antigen: ribonucleoprotein (RNP) complexes. We describe a simple and efficient method for screening antibodies specific for large intact RNPs and individual components. We also describe a fast and easy method to overcome the abundance of amber stop codons in the positive phage clones. The resulting antibodies have been used in ELISA and Western blot analysis.
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Affiliation(s)
- Si Wu
- Department of Molecular & Cell Biology, University of California, Berkeley, California 94720, USA
| | - Ailong Ke
- Department of Molecular & Cell Biology, University of California, Berkeley, California 94720, USA
| | - Jennifer A Doudna
- Department of Molecular & Cell Biology, University of California, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Berkeley, California 94720, USA
- Howard Hughes Medical Institute, University of California, Berkeley, California 94720, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Corresponding author. 301B/E Hildebrand Hall, University of California, Berkeley, CA 94720, USA. Tel: 510-643-0225; Fax: 510-643-0080. Email address:
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Rodríguez-Díaz J, Montava R, García-Díaz A, Buesa J. Humoral immune response to rotavirus NSP4 enterotoxin in Spanish children. J Med Virol 2005; 77:317-22. [PMID: 16121377 DOI: 10.1002/jmv.20450] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The rotavirus non-structural protein 4 (NSP4) has been shown to play a crucial role in rotavirus-induced diarrhea, acting as a viral enterotoxin. It has also been demonstrated that antibody to NSP4 can reduce the severity of rotavirus-induced diarrhea in newborn mice. Two recombinant baculoviruses, expressing the NSP4 protein from the SA11 and Wa rotavirus strains, genotypes A and B, respectively, were used to produce and purify these glycoproteins, which were applied as antigen in an enzyme-linked immunosorbent assay (ELISA) to test the specific antibody response to NSP4 in human sera. Serum samples from 30 children convalescing from a rotavirus infection, from 54 healthy children under 5-years-old, and from 49 adults were tested to determine the presence of antibodies to the viral enterotoxin and to rotavirus structural proteins. Seventy percent of the sera from rotavirus-infected children showed an IgG antibody response to either one or both NSP4 proteins used in this study, although the response was weak. However, IgG antibodies towards either one or both NSP4 proteins were only detected in 26% of the non-convalescent healthy children and in only 18% of the adults. No serum IgA antibodies towards NSP4 were found in this study. IgG antibody recognition of the NSP4 protein from the SA11 and Wa rotavirus strains was not always heterotypic.
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Affiliation(s)
- Jesús Rodríguez-Díaz
- Department of Microbiology, School of Medicine, Hospital Clínico Universitario, University of Valencia, Valencia, Spain
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