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Ishiyama R, Yoshida K, Oikawa K, Takai-Todaka R, Kato A, Kanamori K, Nakanishi A, Haga K, Katayama K. Production of infectious reporter murine norovirus by VP2 trans-complementation. J Virol 2024; 98:e0126123. [PMID: 38226813 PMCID: PMC10878090 DOI: 10.1128/jvi.01261-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 01/17/2024] Open
Abstract
Human norovirus (HuNoV) causes gastroenteritis, a disease with no effective therapy or vaccine, and does not grow well in culture. Murine norovirus (MNV) easily replicates in cell cultures and small animals and has often been used as a model to elucidate the structural and functional characteristics of HuNoV. An MNV plasmid-based reverse genetics system was developed to produce the modified recombinant virus. In this study, we attempted to construct the recombinant virus by integrating a foreign gene into MNV ORF3, which encodes the minor structural protein VP2. Deletion of VP2 expression abolished infectious particles from MNV cDNA clones, and supplying exogenous VP2 to the cells rescued the infectivity of cDNA clones without VP2 expression. In addition, the coding sequence of C-terminal ORF3 was essential for cDNA clones compensated with VP2 to produce infectious particles. Furthermore, the recombinant virus with exogenous reporter genes in place of the dispensable region of ORF3 was propagated when VP2 was constitutively supplied. Our findings indicate that foreign genes can be transduced into the norovirus ORF3 region when VP2 is supplied and that successive propagation of modified recombinant norovirus could lead to the development of norovirus-based vaccines or therapeutics.IMPORTANCEIn this study, we revealed that some of the coding regions of ORF3 could be replaced by a foreign gene and infectious virus could be produced when VP2 was supplied. Propagation of this virus depended on VP2 being supplied in trans, indicating that this virus could infect only once. Our findings help to elucidate the functions of VP2 in the virus lifecycle and to develop other caliciviral vectors for recombinant attenuated live enteric virus vaccines or therapeutics tools.
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Affiliation(s)
- Ryoka Ishiyama
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuhiro Yoshida
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Kazuki Oikawa
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Reiko Takai-Todaka
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Akiko Kato
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Kumiko Kanamori
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
| | - Akira Nakanishi
- Department of Aging Intervention, National Center for Geriatrics and Gerontology, Laboratory of Gene Therapy, and Laboratory for Radiation Safety, Aichi, Japan
- Department of Biology-Oriented Science and Technology, Kindai University, Wakayama, Japan
| | - Kei Haga
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
| | - Kazuhiko Katayama
- Department of Infection Control and Immunology, Laboratory of Viral Infection, Ōmura Satoshi Memorial Institute & Graduate School of Infection Control Sciences, Kitasato University, Tokyo, Japan
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Rahmani M, Mozafari A, Jafari M, Salmanian AH. The heat-labile enterotoxin B subunit bio-adjuvant linked to Newcastle disease virus recombinant hemagglutinin neuraminidase elicited a humoral immune response in animal model. Cell Mol Biol (Noisy-le-grand) 2023; 69:94-99. [PMID: 37953579 DOI: 10.14715/cmb/2023.69.10.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Indexed: 11/14/2023]
Abstract
Newcastle disease is a highly contagious viral infection primarily affecting poultry, leading to significant economic losses worldwide due to its high morbidity and mortality rates. Given the severity of the disease and its impact on the poultry industry, there is an urgent need for a preventative approach to tackle this issue. Developing an efficient and effective vaccine is a valuable step toward reducing the burden of this virus. Consequently, investing in preventive measures, such as vaccination programs, is a top priority to mitigate the economic losses associated with Newcastle disease and protect the livelihoods of those relying on the poultry industry. Despite many vaccines against this viral disease, it still infects many wild and domestic birds worldwide. In this work, chimeric proteins, composed of the recombinant B subunit of Enterotoxigenic E. coli with one or two HN (Hemagglutinin-neuraminidase) subunits of NDV (LHN and LHN2, respectively), expressed using E.coli host. In-silico, in-vitro, and In-vivo procedures were performed to evaluate the immunogenicity of these proteins. The sera from immunized mice were analyzed using Western Blotting and ELISA. The LHN2 protein with an extra HN subunit elicited a higher antibody titer than the LHN protein (P<0.05). Both products could effectively elicit an immune response against NDV and can be considered a component of Newcastle disease vaccine candidates.
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Affiliation(s)
- Mehregan Rahmani
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Atena Mozafari
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Mahyat Jafari
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Ali Hatef Salmanian
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
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Wang Y, Zhang G, Zhong L, Qian M, Wang M, Cui R. Filamentous bacteriophages, natural nanoparticles, for viral vaccine strategies. Nanoscale 2022; 14:5942-5959. [PMID: 35389413 DOI: 10.1039/d1nr08064d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Filamentous bacteriophages are natural nanoparticles formed by the self-assembly of structural proteins that have the capability of replication and infection. They are used as a highly efficient vaccine platform to enhance immunogenicity and effectively stimulate the innate and adaptive immune response. Compared with traditional vaccines, phage-based vaccines offer thermodynamic stability, biocompatibility, homogeneity, high carrying capacity, self-assembly, scalability, and low toxicity. This review summarizes recent research on phage-based vaccines in virus prevention. In addition, the expression systems of filamentous phage-based virus vaccines and their application principles are discussed. Moreover, the prospect of the prevention of emerging infectious diseases, such as coronavirus 2019 (COVID-19), is also discussed.
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Affiliation(s)
- Yicun Wang
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun 130024, China.
| | - Guangxin Zhang
- Department of Thoracic Surgery, The Second Hospital of Jilin University, Changchun 130024, China
| | - Lili Zhong
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun 130024, China.
| | - Min Qian
- Department of Neonatology, The Second Hospital of Jilin University, Changchun 130024, China
| | - Meng Wang
- Department of Respiratory Medical Oncology, Harbin Medical University Cancer Hospital, China
| | - Ranji Cui
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun 130024, China.
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4
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Gao Y, Yue Y, Xiong S. An Albumin-Binding Domain Peptide Confers Enhanced Immunoprotection Against Viral Myocarditis by CVB3 VP1 Vaccine. Front Immunol 2021; 12:666594. [PMID: 34630378 PMCID: PMC8492941 DOI: 10.3389/fimmu.2021.666594] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 09/06/2021] [Indexed: 11/13/2022] Open
Abstract
Coxsackievirus B3 (CVB3)-induced viral myocarditis is a common clinical cardiovascular disease without effective available vaccine. In this study, we tried to potentiate the immunoprotection efficacy of our previous CVB3-specific VP1 protein vaccine by introducing a streptococcal protein G-derived, draining lymph nodes (dLNs)-targeting albumin-binding domain (ABD) peptide. We found that compared with the original VP1 vaccine, ABD-fused VP1 (ABD-VP1) vaccine gained the new ability to efficiently bind murine albumin both in vitro and in vivo, possessed a much longer serum half-life in serum and exhibited more abundance in the dLNs after immunization. Accordingly, ABD-VP1 immunization not only significantly facilitated the enrichment and maturation of dendritic cells (DCs), induced higher percentages of IFN-γ+ CD8 + cells in the dLNs, but also robustly promoted VP1-induced T cell proliferation and cytotoxic T lymphocyte (CTL) responses in the spleens. More importantly, ABD-VP1 also elicited higher percentages of protective CD44hi CD62Lhi memory T cells in dLNs and spleens. Consequently, obvious protective effect against viral myocarditis was conferred by ABD-VP1 vaccine compared to the VP1 vaccine, reflected by the less body weight loss, improved cardiac function, alleviated cardiac histomorphological changes and an increased 28-day survival rate. Our results indicated that the ABD might be a promising immune-enhancing regime for vaccine design and development.
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Affiliation(s)
| | - Yan Yue
- Jiangsu Provincial Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Science, Soochow University, Suzhou, China
| | - Sidong Xiong
- Jiangsu Provincial Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Science, Soochow University, Suzhou, China
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5
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Tahir Ul Qamar M, Ismail S, Ahmad S, Mirza MU, Abbasi SW, Ashfaq UA, Chen LL. Development of a Novel Multi-Epitope Vaccine Against Crimean-Congo Hemorrhagic Fever Virus: An Integrated Reverse Vaccinology, Vaccine Informatics and Biophysics Approach. Front Immunol 2021; 12:669812. [PMID: 34220816 PMCID: PMC8242340 DOI: 10.3389/fimmu.2021.669812] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/28/2021] [Indexed: 12/22/2022] Open
Abstract
Crimean-Congo hemorrhagic fever (CCHF) is a highly severe and virulent viral disease of zoonotic origin, caused by a tick-born CCHF virus (CCHFV). The virus is endemic in many countries and has a mortality rate between 10% and 40%. As there is no licensed vaccine or therapeutic options available to treat CCHF, the present study was designed to focus on application of modern computational approaches to propose a multi-epitope vaccine (MEV) expressing antigenic determinants prioritized from the CCHFV genome. Integrated computational analyses revealed the presence of 9 immunodominant epitopes from Nucleoprotein (N), RNA dependent RNA polymerase (RdRp), Glycoprotein N (Gn/G2), and Glycoprotein C (Gc/G1). Together these epitopes were observed to cover 99.74% of the world populations. The epitopes demonstrated excellent binding affinity for the B- and T-cell reference set of alleles, the high antigenic potential, non-allergenic nature, excellent solubility, zero percent toxicity and interferon-gamma induction potential. The epitopes were engineered into an MEV through suitable linkers and adjuvating with an appropriate adjuvant molecule. The recombinant vaccine sequence revealed all favorable physicochemical properties allowing the ease of experimental analysis in vivo and in vitro. The vaccine 3D structure was established ab initio. Furthermore, the vaccine displayed excellent binding affinity for critical innate immune receptors: TLR2 (-14.33 kcal/mol) and TLR3 (-6.95 kcal/mol). Vaccine binding with these receptors was dynamically analyzed in terms of complex stability and interaction energetics. Finally, we speculate the vaccine sequence reported here has excellent potential to evoke protective and specific immune responses subject to evaluation of downstream experimental analysis.
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MESH Headings
- Animals
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Antigens, Viral/metabolism
- Antigens, Viral/pharmacology
- Computational Biology
- Computer-Aided Design
- Drug Development
- Hemorrhagic Fever Virus, Crimean-Congo/genetics
- Hemorrhagic Fever Virus, Crimean-Congo/immunology
- Hemorrhagic Fever, Crimean/immunology
- Hemorrhagic Fever, Crimean/prevention & control
- Hemorrhagic Fever, Crimean/virology
- Immunodominant Epitopes
- Immunogenicity, Vaccine
- Molecular Docking Simulation
- Molecular Dynamics Simulation
- Ticks/virology
- Toll-Like Receptor 2/metabolism
- Toll-Like Receptor 3/metabolism
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/metabolism
- Vaccines, DNA/pharmacology
- Vaccinology
- Viral Vaccines/genetics
- Viral Vaccines/immunology
- Viral Vaccines/metabolism
- Viral Vaccines/pharmacology
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Affiliation(s)
| | - Saba Ismail
- NUMS Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Sajjad Ahmad
- Department of Microbiology and Pharmacy, Abasyn University, Peshawar, Pakistan
| | - Muhammad Usman Mirza
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Sumra Wajid Abbasi
- NUMS Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Ling-Ling Chen
- College of Life Science and Technology, Guangxi University, Nanning, China
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6
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Abstract
In the past two decades, 7 coronaviruses have infected the human population, with two major outbreaks caused by SARS-CoV and MERS-CoV in the year 2002 and 2012, respectively. Currently, the entire world is facing a pandemic of another coronavirus, SARS-CoV-2, with a high fatality rate. The spike glycoprotein of SARS-CoV-2 mediates entry of virus into the host cell and is one of the most important antigenic determinants, making it a potential candidate for a vaccine. In this study, we have computationally designed a multi-epitope vaccine using spike glycoprotein of SARS-CoV-2. The overall quality of the candidate vaccine was validated in silico and Molecular Dynamics Simulation confirmed the stability of the designed vaccine. Docking studies revealed stable interactions of the vaccine with Toll-Like Receptors and MHC Receptors. The in silico cloning and codon optimization supported the proficient expression of the designed vaccine in E. coli expression system. The efficiency of the candidate vaccine to trigger an effective immune response was assessed by an in silico immune simulation. The computational analyses suggest that the designed multi-epitope vaccine is structurally stable which can induce specific immune responses and thus, can be a potential vaccine candidate against SARS-CoV-2.
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Affiliation(s)
- Tamalika Kar
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India
| | - Utkarsh Narsaria
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India
| | - Srijita Basak
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India
| | - Debashrito Deb
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India
| | - Filippo Castiglione
- Institute for Applied Computing, National Research Council of Italy, Via dei Taurini, Rome, Italy
| | - David M Mueller
- Center for Genetic Diseases, The Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, USA
| | - Anurag P Srivastava
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India.
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7
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Stefano ML, Kream RM, Stefano GB. A Novel Vaccine Employing Non-Replicating Rabies Virus Expressing Chimeric SARS-CoV-2 Spike Protein Domains: Functional Inhibition of Viral/Nicotinic Acetylcholine Receptor Complexes. Med Sci Monit 2020; 26:e926016. [PMID: 32463026 PMCID: PMC7278327 DOI: 10.12659/msm.926016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 12/14/2022] Open
Abstract
The emergence of the novel ß-coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has resulted in a global pandemic of coronavirus disease 2019 (COVID-19). Clinical studies have documented that potentially severe neurological symptoms are associated with SARS-CoV-2 infection, thereby suggesting direct CNS penetration by the virus. Prior studies have demonstrated that the destructive neurological effects of rabies virus (RABV) infections are mediated by CNS transport of the virus tightly bound to the nicotinic acetylcholine receptor (nAChR). By comparison, it has been hypothesized that a similar mechanism exists to explain the multiple neurological effects of SARS-CoV-2 via binding to peripheral nAChRs followed by orthograde or retrograde transport into the CNS. Genetic engineering of the RABV has been employed to generate novel vaccines consisting of non-replicating RABV particles expressing chimeric capsid proteins containing human immunodeficiency virus 1 (HIV-1), Middle East respiratory syndrome (MERS-CoV), Ebolavirus, and hepatitis C virus (HCV) sequences. Accordingly, we present a critical discussion that integrates lessons learned from prior RABV research and vaccine development into a working model of a SARS-CoV-2 vaccine that selectively targets and neutralizes CNS penetration of a tightly bound viral nAChR complex.
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Affiliation(s)
| | - Richard M. Kream
- Department of Psychiatry, First Faculty of Medicine Charles University in Prague and General University Hospital in Prague, Center for Cognitive and Molecular Neuroscience, Prague, Czech Republic
- International Scientific Information, Inc., Melville, NY, U.S.A
| | - George B. Stefano
- Department of Psychiatry, First Faculty of Medicine Charles University in Prague and General University Hospital in Prague, Center for Cognitive and Molecular Neuroscience, Prague, Czech Republic
- International Scientific Information, Inc., Melville, NY, U.S.A
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8
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Chen L, Yu B, Hua J, Ni Z, Ye W, Yun T, Zhang C. Optimized Expression of Duck Tembusu Virus E Gene Delivered by a Vectored Duck Enteritis Virus In Vitro. Mol Biotechnol 2020; 61:783-790. [PMID: 31482466 DOI: 10.1007/s12033-019-00206-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In our previous study, a recombinant duck enteritis virus (DEV) delivering codon-optimized E gene (named as E-ch) of duck Tembusu virus (DTMUV) optimized referring to chicken's codon bias has been obtained based on the infectious bacterial artificial chromosome (BAC) clone of duck enteritis virus vaccine strain pDEV-EF1, but the expression level of E-ch in recombinant virus rDEV-E-ch-infected cells was very low. To optimize DTMUV E gene expression delivered by the vectored DEV, different forms of E gene (collectively called EG) including origin E gene (E-ori), truncated E451-ori gene, codon-optimized E-dk gene optimized referring to duck's codon bias, as well as the truncated E451-ch and E451-dk, Etpa-ori and Etpa-451-ori, which contain prefixing chick TPA signal peptide genes, were cloned into transfer vector pEP-BGH-end, and several recombinant plasmids pEP-BGH-EG were constructed. Then the expression cassettes pCMV-EG-polyABGH amplified from pEP-BGH-EG by PCR were inserted into US7/US8 gene intergenic region of pDEV-EF1 by two-step Red/ET recombination, 7 strain recombinant mutated BAC clones pDEV-EG carrying different E genes were constructed. Next, the recombinant viruses rDEV-EG were reconstituted from chicken embryo fibroblasts (CEFs) by calcium phosphate precipitation. Western blot analysis showed that E or E451 protein is expressed in rDEV-E-ori, rDEV-E-ch, rDEV-Etpa-ori, rDEV-E451-ori, rDEV-E451-dk, and rDEV-E451-ch-infected CEFs, and protein expression level in rDEV-E451-dk-infected CEFs is the highest. These studies have laid a foundation for developing bivalent vaccine controlling DEV and DTMUV infection.
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Affiliation(s)
- Liu Chen
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Bin Yu
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Jonggang Hua
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Zheng Ni
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Weicheng Ye
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Tao Yun
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China
| | - Cun Zhang
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agriculture Sciences, Hangzhou, 310021, China.
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9
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Wetzel D, Barbian A, Jenzelewski V, Schembecker G, Merz J, Piontek M. Bioprocess optimization for purification of chimeric VLP displaying BVDV E2 antigens produced in yeast Hansenula polymorpha. J Biotechnol 2019; 306:203-212. [PMID: 31634510 DOI: 10.1016/j.jbiotec.2019.10.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 10/09/2019] [Accepted: 10/10/2019] [Indexed: 12/15/2022]
Abstract
Chimeric virus-like particles (VLP) are known as promising tools in the development of safe and effective subunit vaccines. Recently, a technology platform to produce VLP based on the small surface protein (dS) of the duck hepatitis B virus was established. In this study, chimeric VLP were investigated displaying the 195 N-terminal amino acids derived from the glycoprotein E2 of the bovine viral diarrhea virus (BVDV) on their surface. Isolation of the VLP from methylotrophic yeast Hansenula polymorpha was allowed upon co-expression of wild-type dS and a fusion protein composed of the BVDV-derived antigen N-terminally fused to the dS. It was shown the VLP could be purified by a process adapted from the production of a recombinant hepatitis B VLP vaccine. However, the process essentially depended on costly ultracentrifugation which is critical for low cost production. In novel process variants, this step was avoided after modification of the initial batch capture step, the introduction of a precipitation step and adjusting the ion exchange chromatography. The product yield could be improved by almost factor 8 to 93 ± 12 mg VLP protein per 100 g dry cell weight while keeping similar product purity and antigenicity. This allows scalable and cost efficient VLP production.
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Affiliation(s)
- David Wetzel
- ARTES Biotechnology GmbH, Elisabeth-Selbert-Strasse 9, 40764 Langenfeld, Germany; Technical University of Dortmund, Laboratory of Plant and Process Design, Emil-Figge-Strasse 70, 44227 Dortmund, Germany.
| | - Andreas Barbian
- Duesseldorf University Hospital, Institute for anatomy I, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Volker Jenzelewski
- ARTES Biotechnology GmbH, Elisabeth-Selbert-Strasse 9, 40764 Langenfeld, Germany
| | - Gerhard Schembecker
- Technical University of Dortmund, Laboratory of Plant and Process Design, Emil-Figge-Strasse 70, 44227 Dortmund, Germany
| | - Juliane Merz
- Evonik Technology & Infrastructure GmbH, Rodenbacher Chaussee 4, 63457 Hanau, Germany
| | - Michael Piontek
- ARTES Biotechnology GmbH, Elisabeth-Selbert-Strasse 9, 40764 Langenfeld, Germany
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10
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Abstract
Virus-like particles (VLPs) are nanostructures that resemble the structures of viruses. They are composed of one or more structural proteins that can be arranged in several layers and can also contain a lipid outer envelope. VLPs trigger a high humoral and cellular immune response due to their repetitive structures. A key factor regarding VLP safety is the lack of viral genomic material, which enhances safety during both manufacture and administration. Contemporary VLP production may take advantage of several systems, including bacterial, yeast, insect and mammalian cells. The choice of production platform depends on several factors, including cost and the need for post-translational modifications (PTMs), which can be essential in generating an optimal immune response. Some VLP-based vaccines designed to prevent several infectious diseases are already approved and on the market, with many others at the clinical trial or research stage. Interest in this technology has recently increased due to its advantages over classical vaccines. This paper reviews the state-of-the-art of VLP production systems and the newest generation of VLP-based vaccines now available.
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Affiliation(s)
- J Fuenmayor
- Grup d'Enginyeria Cel·lular i Bioprocés, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Campus de Bellaterra, Cerdanyola del Vallès, Barcelona, Spain.
| | - F Gòdia
- Grup d'Enginyeria Cel·lular i Bioprocés, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Campus de Bellaterra, Cerdanyola del Vallès, Barcelona, Spain
| | - L Cervera
- Viral Vectors and Vaccines Bioprocessing Group, Department of Bioengineering, 817 Sherbrooke Street West, Room 270, Macdonald Engineering Building, McGill University, H3A 0C3, Montreal, QC, Canada
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11
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Rosales-Mendoza S, Sández-Robledo C, Bañuelos-Hernández B, Angulo C. Corn-based vaccines: current status and prospects. Planta 2017; 245:875-888. [PMID: 28349257 DOI: 10.1007/s00425-017-2680-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 03/20/2017] [Indexed: 06/06/2023]
Abstract
Corn is an attractive host for vaccine production and oral delivery. The present review provides the current outlook and perspectives for this field. Among seed-crops, corn represents a key source of biomass for food, fuel production, and other applications. Since the beginning of the development of plant-based vaccines, corn was explored for the production and delivery of vaccines. About a dozen of pathogens have been studied under this technology with distinct degrees of development. A vaccine prototype against enterotoxigenic Escherichia coli was evaluated in a phase I clinical trial and several candidates targeting bacterial and viral diseases are under preclinical evaluation. The present review provides an updated outlook on this topic highlighting the employed expression strategies; perspectives for the field are also provided.
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Affiliation(s)
- Sergio Rosales-Mendoza
- Laboratorio de Biofarmacéuticos Recombinantes, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, SLP, 78210, Mexico.
| | - Cristhian Sández-Robledo
- Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, BCS, 23096, Mexico
| | - Bernardo Bañuelos-Hernández
- Laboratorio de Biofarmacéuticos Recombinantes, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, SLP, 78210, Mexico
| | - Carlos Angulo
- Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, BCS, 23096, Mexico
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12
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Richetta M, Gómez E, Lucero MS, Chimeno Zoth S, Gravisaco MJ, Calamante G, Berinstein A. Comparison of homologous and heterologous prime-boost immunizations combining MVA-vectored and plant-derived VP2 as a strategy against IBDV. Vaccine 2017; 35:142-148. [PMID: 27876199 DOI: 10.1016/j.vaccine.2016.11.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 10/17/2016] [Accepted: 11/07/2016] [Indexed: 12/31/2022]
Abstract
Different immunogens such as subunit, DNA or live viral-vectored vaccines against Infectious Bursal Disease virus (IBDV) have been evaluated in the last years. However, the heterologous prime-boost approach using recombinant modified vaccinia Ankara virus (rMVA), which has shown promising results in both mammals and chickens, has not been tried against this pathogen yet. IBD is a highly contagious and immunosuppressive disease of poultry that affects mainly young chicks. It is caused by IBDV, a double-stranded RNA virus carrying its main antigenic epitopes on the capsid protein VP2. Our objective was to evaluate the immune response elicited by two heterologous prime-boost schemes combining an rMVA carrying the VP2 mature gene (rVP2) and a recombinant VP2 protein produced in Nicotiana benthamiana (pVP2), and to compare them with the performance of the homologous pVP2-pVP2 scheme usually used in our laboratory. The SPF chickens immunized with the three evaluated schemes elicited significantly higher anti-VP2 antibody titers (p<0.001) and seroneutralizing titers (p<0.05) and had less T-cell infiltration (p<0.001), histological damage (p<0.001) and IBDV particles (p<0.001) in their bursae of Fabricius when compared with control groups. No significant differences were found between both heterologous schemes and the homologous one. However, the rVP2-pVP2 scheme showed significantly higher anti-VP2 antibody titers than pVP2-rVP2 and a similar tendency was found in the seroneutralization assay. Conversely, pVP2-rVP2 had the best performance when evaluated through bursal parameters despite having a less potent humoral immune response. These findings suggest that the order in which rVP2 and pVP2 are combined can influence the immune response obtained. Besides, the lack of a strong humoral immune response did not lessen the ability to protect from IBDV challenge. Therefore, further research is needed to evaluate the mechanisms by which these immunogens are working in order to define the combination that performs better against IBDV.
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MESH Headings
- Animals
- Antibodies, Neutralizing/blood
- Antibodies, Viral/blood
- Bursa of Fabricius/pathology
- Chickens
- Drug Carriers/administration & dosage
- Infectious bursal disease virus/genetics
- Infectious bursal disease virus/immunology
- Plants, Genetically Modified/genetics
- Plants, Genetically Modified/metabolism
- Recombinant Proteins/administration & dosage
- Recombinant Proteins/genetics
- Recombinant Proteins/immunology
- Recombinant Proteins/isolation & purification
- T-Lymphocytes/immunology
- Nicotiana
- Vaccination/methods
- Vaccines, Subunit/administration & dosage
- Vaccines, Subunit/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/metabolism
- Vaccinia virus/genetics
- Viral Structural Proteins/administration & dosage
- Viral Structural Proteins/genetics
- Viral Structural Proteins/immunology
- Viral Structural Proteins/isolation & purification
- Viral Vaccines/administration & dosage
- Viral Vaccines/genetics
- Viral Vaccines/immunology
- Viral Vaccines/metabolism
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Affiliation(s)
- Matías Richetta
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Rivadavia 1917, C1033AAV Ciudad de Buenos Aires, Argentina.
| | - Evangelina Gómez
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Rivadavia 1917, C1033AAV Ciudad de Buenos Aires, Argentina.
| | - María Soledad Lucero
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina.
| | - Silvina Chimeno Zoth
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Rivadavia 1917, C1033AAV Ciudad de Buenos Aires, Argentina.
| | - María José Gravisaco
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina.
| | - Gabriela Calamante
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina.
| | - Analía Berinstein
- Instituto de Biotecnología, CICVyA, INTA, Castelar, CC 25 B1712WAA, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Rivadavia 1917, C1033AAV Ciudad de Buenos Aires, Argentina.
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13
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Kim MS, Lee JA, Kim KH. Effects of a broad-spectrum caspase inhibitor, Z-VAD(OMe)-FMK, on viral hemorrhagic septicemia virus (VHSV) infection-mediated apoptosis and viral replication. Fish Shellfish Immunol 2016; 51:41-45. [PMID: 26899629 DOI: 10.1016/j.fsi.2016.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 12/30/2015] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
In the development of inactivated or attenuated viral vaccines for cultured fish, viral titers harvested from the cultured cells would be the most important factor for the determination of vaccine's cost effectiveness. In this study, we hypothesized that the lengthening of cell survival time by the inhibition of apoptosis can lead to an increase of the final titer of viral hemorrhagic septicemia virus (VHSV). To test the hypothesis, we investigated the effects of a broad-spectrum caspase inhibitor, Z-VAD(OMe)-FMK, on VHSV infection-mediated apoptosis in Epithelioma papulosum cyprini (EPC) cells and on the VHSV titers. VHSV infection induced the DNA laddering in EPC cells, and the progression of DNA fragmentation was in proportion to the CPE extension. The progression of DNA fragmentation in EPC cells infected with VHSV was clearly inhibited by exposure to Z-VAD(OMe)-FMK, and the inhibition was intensified according to the increase of the inhibitor concentration. These results confirmed the previous reports that the death of host cells by VHSV infection is through apoptosis. Cells infected with a recombinant VHSV, rVHSV-ΔNV-eGFP, that was generated from our previous study by replacement of the NV gene ORF with the enhanced green fluorescent protein (eGFP) gene ORF, showed earlier and more distinct DNA fragmentations compared to the cells infected with wild-type VHSV, suggesting the inhibitory role of the NV protein in VHSV-mediated apoptosis that was previously reported. The final viral titers in the supernatant isolated from Z-VAD(OMe)-FMK treated cells after showing an extensive CPE were significantly higher than the viral titers from cells infected with virus alone, indicating that the delay of apoptosis by Z-VAD(OMe)-FMK extended the survival time of EPC cells, which lengthen the time for VHSV replication in the cells. In conclusion, Z-VAD(OMe)-FMK-mediated inhibition of apoptosis significantly increased the final titers of both wild-type VHSV and rVHSV-ΔNV-eGFP, indicating that apoptosis inhibition can be a way to get higher titers of VHSV.
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Affiliation(s)
- Min Sun Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea
| | - Ji Ae Lee
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea
| | - Ki Hong Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea.
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14
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Matho MH, Schlossman A, Meng X, Benhnia MREI, Kaever T, Buller M, Doronin K, Parker S, Peters B, Crotty S, Xiang Y, Zajonc DM. Structural and Functional Characterization of Anti-A33 Antibodies Reveal a Potent Cross-Species Orthopoxviruses Neutralizer. PLoS Pathog 2015; 11:e1005148. [PMID: 26325270 PMCID: PMC4556652 DOI: 10.1371/journal.ppat.1005148] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 08/13/2015] [Indexed: 11/18/2022] Open
Abstract
Vaccinia virus A33 is an extracellular enveloped virus (EEV)-specific type II membrane glycoprotein that is essential for efficient EEV formation and long-range viral spread within the host. A33 is a target for neutralizing antibody responses against EEV. In this study, we produced seven murine anti-A33 monoclonal antibodies (MAbs) by immunizing mice with live VACV, followed by boosting with the soluble A33 homodimeric ectodomain. Five A33 specific MAbs were capable of neutralizing EEV in the presence of complement. All MAbs bind to conformational epitopes on A33 but not to linear peptides. To identify the epitopes, we have adetermined the crystal structures of three representative neutralizing MAbs in complex with A33. We have further determined the binding kinetics for each of the three antibodies to wild-type A33, as well as to engineered A33 that contained single alanine substitutions within the epitopes of the three crystallized antibodies. While the Fab of both MAbs A2C7 and A20G2 binds to a single A33 subunit, the Fab from MAb A27D7 binds to both A33 subunits simultaneously. A27D7 binding is resistant to single alanine substitutions within the A33 epitope. A27D7 also demonstrated high-affinity binding with recombinant A33 protein that mimics other orthopoxvirus strains in the A27D7 epitope, such as ectromelia, monkeypox, and cowpox virus, suggesting that A27D7 is a potent cross-neutralizer. Finally, we confirmed that A27D7 protects mice against a lethal challenge with ectromelia virus.
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MESH Headings
- Animals
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/genetics
- Antibodies, Monoclonal/metabolism
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Neutralizing/chemistry
- Antibodies, Neutralizing/genetics
- Antibodies, Neutralizing/metabolism
- Antibodies, Neutralizing/therapeutic use
- Antibody Affinity
- Antibody Specificity
- Antigen-Antibody Complex/chemistry
- Antigen-Antibody Complex/genetics
- Antigen-Antibody Complex/metabolism
- Chlorocebus aethiops
- Female
- Immunoglobulin Fab Fragments/chemistry
- Immunoglobulin Fab Fragments/genetics
- Immunoglobulin Fab Fragments/metabolism
- Membrane Glycoproteins/antagonists & inhibitors
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mice, Inbred BALB C
- Models, Molecular
- Mutation
- Orthopoxvirus/immunology
- Orthopoxvirus/physiology
- Poxviridae Infections/immunology
- Poxviridae Infections/prevention & control
- Poxviridae Infections/virology
- Protein Conformation
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Recombinant Proteins/therapeutic use
- Vaccines, Synthetic/chemistry
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/metabolism
- Vaccines, Synthetic/therapeutic use
- Vero Cells
- Viral Envelope Proteins/antagonists & inhibitors
- Viral Envelope Proteins/genetics
- Viral Envelope Proteins/metabolism
- Viral Tropism
- Viral Vaccines/chemistry
- Viral Vaccines/genetics
- Viral Vaccines/metabolism
- Viral Vaccines/therapeutic use
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Affiliation(s)
- Michael H. Matho
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Andrew Schlossman
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Xiangzhi Meng
- Department of Microbiology and Immunology, University of Texas Health Science Center, San Antonio, Texas, United States of America
| | - Mohammed Rafii-El-Idrissi Benhnia
- Department of Medical Biochemistry, Molecular Biology, and Immunology, School of Medicine, University of Seville; and Laboratory of Immunovirology, Unit 211, Biomedicine Institute of Seville (IBIS), Seville, Spain
| | - Thomas Kaever
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Mark Buller
- Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Konstantin Doronin
- Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Scott Parker
- Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Bjoern Peters
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Shane Crotty
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Yan Xiang
- Department of Microbiology and Immunology, University of Texas Health Science Center, San Antonio, Texas, United States of America
| | - Dirk M. Zajonc
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
- * E-mail:
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15
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Aubrit F, Perugi F, Léon A, Guéhenneux F, Champion-Arnaud P, Lahmar M, Schwamborn K. Cell substrates for the production of viral vaccines. Vaccine 2015; 33:5905-12. [PMID: 26187258 DOI: 10.1016/j.vaccine.2015.06.110] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 06/12/2015] [Accepted: 06/26/2015] [Indexed: 11/20/2022]
Abstract
Vaccines have been used for centuries to protect people and animals against infectious diseases. For vaccine production, it has become evident that cell culture technology can be considered as a key milestone and has been the result of decades of progress. The development and implementation of cell substrates have permitted massive and safe production of viral vaccines. The demand in new vaccines against emerging viral diseases, the increasing vaccine production volumes, and the stringent safety rules for manufacturing have made cell substrates mandatory viral vaccine producer factories. In this review, we focus on cell substrates for the production of vaccines against human viral diseases. Depending on the nature of the vaccine, choice of the cell substrate is critical. Each manufacturer intending to develop a new vaccine candidate should assess several cell substrates during the early development phase in order to select the most convenient for the application. First, as vaccine safety is quite naturally a central concern of Regulatory Agencies, the cell substrate has to answer the regulatory rules stringency. In addition, the cell substrate has to be competitive in terms of viral-specific production yields and manufacturing costs. No cell substrate, even the so-called "designer" cell lines, is able to fulfil all the requested criteria for all viral vaccines. Therefore, the availability of a variety of cell substrates for vaccine production is essential because it improves the chance to successfully respond to the current and future needs of vaccines linked to new emerging or re-emerging infectious diseases (e.g. pandemic flu, Ebola, and Chikungunya outbreaks).
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Affiliation(s)
- Françoise Aubrit
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Fabien Perugi
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Arnaud Léon
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Fabienne Guéhenneux
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Patrick Champion-Arnaud
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Mehdi Lahmar
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
| | - Klaus Schwamborn
- Vaccines Research & Discovery Department, Valneva SE, 6 rue Alain Bombard, 44800 Saint-Herblain, France.
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16
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Miura R, Kooriyama T, Yoneda M, Takenaka A, Doki M, Goto Y, Sanjoba C, Endo Y, Fujiyuki T, Sugai A, Tsukiyama-Kohara K, Matsumoto Y, Sato H, Kai C. Efficacy of Recombinant Canine Distemper Virus Expressing Leishmania Antigen against Leishmania Challenge in Dogs. PLoS Negl Trop Dis 2015; 9:e0003914. [PMID: 26162094 PMCID: PMC4498809 DOI: 10.1371/journal.pntd.0003914] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 06/16/2015] [Indexed: 12/02/2022] Open
Abstract
Canine distemper virus (CDV) vaccination confers long-term protection against CDV reinfection. To investigate the utility of CDV as a polyvalent vaccine vector for Leishmania, we generated recombinant CDVs, based on an avirulent Yanaka strain, that expressed Leishmania antigens: LACK, TSA, or LmSTI1 (rCDV-LACK, rCDV-TSA, and rCDV-LmSTI1, respectively). Dogs immunized with rCDV-LACK were protected against challenge with lethal doses of virulent CDV, in the same way as the parental Yanaka strain. To evaluate the protective effects of the recombinant CDVs against cutaneous leishmaniasis in dogs, dogs were immunized with one recombinant CDV or a cocktail of three recombinant CDVs, before intradermal challenge (in the ears) with infective-stage promastigotes of Leishmania major. Unvaccinated dogs showed increased nodules with ulcer formation after 3 weeks, whereas dogs immunized with rCDV-LACK showed markedly smaller nodules without ulceration. Although the rCDV-TSA- and rCDV-LmSTI1-immunized dogs showed little protection against L. major, the cocktail of three recombinant CDVs more effectively suppressed the progression of nodule formation than immunization with rCDV-LACK alone. These results indicate that recombinant CDV is suitable for use as a polyvalent live attenuated vaccine for protection against both CDV and L. major infections in dogs.
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Affiliation(s)
- Ryuichi Miura
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Takanori Kooriyama
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Misako Yoneda
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Akiko Takenaka
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Miho Doki
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Yasuyuki Goto
- Department of Molecular Immunology, School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Chizu Sanjoba
- Department of Molecular Immunology, School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yasuyuki Endo
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Tomoko Fujiyuki
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Akihiro Sugai
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | | | - Yoshitsugu Matsumoto
- Department of Molecular Immunology, School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hiroki Sato
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Chieko Kai
- Laboratory Animal Research Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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17
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Hu B, Yang S, Fang ZZ. [Construction of a full-length cDNA clone of a live attenuated vaccine strain against Japanese encephalitis virus and preliminary study of expressing exogenous gene]. Bing Du Xue Bao 2014; 30:652-660. [PMID: 25868280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study aimed to construct full-length cDNA clones of the Japanese encephalitis virus (JEV). SA14-14-2 strain and discuss the feasibility of constructing chimeric viruses for exogenous gene expression based on the JEV genetic skeleton. Long-fragment RT-PCR techniques were applied to amplify JEV cD-NAs, and two amplified fragments with corresponding restriction endonuclease sites at both ends were cloned into the pACYC184 vector sequentially. Using standard molecular techniques, the enhanced green fluorescent protein (EGFP) gene was inserted into the 3' non-coding region of JEV as a reporter gene. After in vitro transcription and transfection procedures, wild-type JEV and chimeric JEV that expressed the EGFP as the reporter gene were successfully rescued. The recovered viruses were characterized by RT-PCR, plaque assays, and direct fluorescence microscopy. After six serial passage generations, the stability of the recovered viruses were studied in terms of virus growth characteristics and structural gene expression. The results showed that cDNA clones of rJEV and rJEV-EGFP were successfully constructed and rescued in BHK-21 cells after in vitro transcription and transfection. Each generation of the recovered viruses was stable and the chimeric virus rJEV-EGFP could stably express EGFP. The findings of this study indicate that both rJEV and rJEV-EGFP could be constructed and rescued in BHK-21 cells, and the JEV SA14-14-2 strain could be obtained as a viral vector to express foreign genes.
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18
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Feng H, Hu GQ, Wang HL, Liang M, Liang H, Guo H, Zhao P, Yang YJ, Zheng XX, Zhang ZF, Zhao YK, Gao YW, Yang ST, Xia XZ. Canine parvovirus VP2 protein expressed in silkworm pupae self-assembles into virus-like particles with high immunogenicity. PLoS One 2014; 9:e79575. [PMID: 24465364 PMCID: PMC3894932 DOI: 10.1371/journal.pone.0079575] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 09/24/2013] [Indexed: 11/19/2022] Open
Abstract
The VP2 structural protein of parvovirus can produce virus-like particles (VLPs) by a self-assembly process in vitro, making VLPs attractive vaccine candidates. In this study, the VP2 protein of canine parvovirus (CPV) was expressed using a baculovirus expression system and assembled into parvovirus-like particles in insect cells and pupae. Electron micrographs of VLPs showed that they were very similar in size and morphology when compared to the wild-type parvovirus. The immunogenicity of the VLPs was investigated in mice and dogs. Mice immunized intramuscularly with purified VLPs, in the absence of an adjuvant, elicited CD4+ and CD8+ T cell responses and were able to elicit a neutralizing antibody response against CPV, while the oral administration of raw homogenates containing VLPs to the dogs resulted in a systemic immune response and long-lasting immunity. These results demonstrate that the CPV-VLPs stimulate both cellular and humoral immune responses, and so CPV-VLPs may be a promising candidate vaccine for the prevention of CPV-associated disease.
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Affiliation(s)
- Hao Feng
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - Gui-qiu Hu
- Agricultural Division, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin Province, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, China
| | - Hua-lei Wang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - Meng Liang
- Agricultural Division, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin Province, China
| | - Hongru Liang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - He Guo
- Agricultural Division, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin Province, China
| | - Pingsen Zhao
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Bejing, China
| | - Yu-jiao Yang
- Agricultural Division, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin Province, China
| | - Xue-xing Zheng
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - Zhi-fang Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yong-kun Zhao
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - Yu-wei Gao
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
| | - Song-tao Yang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
- * E-mail: (XX); (SY)
| | - Xian-zhu Xia
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, Jilin Province, China
- * E-mail: (XX); (SY)
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McNulty S, Colaco CA, Blandford LE, Bailey CR, Baschieri S, Todryk S. Heat-shock proteins as dendritic cell-targeting vaccines--getting warmer. Immunology 2013; 139:407-15. [PMID: 23551234 PMCID: PMC3719058 DOI: 10.1111/imm.12104] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 02/08/2013] [Accepted: 02/15/2013] [Indexed: 12/22/2022] Open
Abstract
Heat-shock proteins (hsp) provide a natural link between innate and adaptive immune responses by combining the ideal properties of antigen carriage (chaperoning), targeting and activation of antigen-presenting cells (APC), including dendritic cells (DC). Targeting is achieved through binding of hsp to distinct cell surface receptors and is followed by antigen internalization, processing and presentation. An improved understanding of the interaction of hsp with DC has driven the development of numerous hsp-containing vaccines, designed to deliver antigens directly to DC. Studies in mice have shown that for cancers, such vaccines generate impressive immune responses and protection from tumour challenge. However, translation to human use, as for many experimental immunotherapies, has been slow partly because of the need to perform trials in patients with advanced cancers, where demonstration of efficacy is challenging. Recently, the properties of hsp have been used for development of prophylactic vaccines against infectious diseases including tuberculosis and meningitis. These hsp-based vaccines, in the form of pathogen-derived hsp-antigen complexes, or recombinant hsp combined with selected antigens in vitro, offer an innovative approach against challenging diseases where broad antigen coverage is critical.
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Affiliation(s)
- Shaun McNulty
- ImmunoBiology Ltd., Babraham Research Campus, Babraham, Cambridge, UK.
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20
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Kamran N, Takai Y, Miyoshi J, Biswas SK, Wong JSB, Gasser S. Toll-like receptor ligands induce expression of the costimulatory molecule CD155 on antigen-presenting cells. PLoS One 2013; 8:e54406. [PMID: 23349877 PMCID: PMC3547938 DOI: 10.1371/journal.pone.0054406] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 12/13/2012] [Indexed: 12/15/2022] Open
Abstract
Genotoxic stress and RAS induce the expression of CD155, a ligand for the immune receptors DNAM-1, CD96 and TIGIT. Here we show that antigen-presenting cells upregulate CD155 expression in response to Toll-like receptor activation. Induction of CD155 by Toll-like receptors depended on MYD88, TRIF and NF-κB. In addition, IRF3, but not IRF7, modulated CD155 upregulation in response to TLR3 signals. Immunization of CD155-deficient mice with OVA and the TLR9 agonist CpG resulted in increased OVA-specific IgG2a/c titers when compared to wild type mice. Splenocytes of immunized CD155-deficient mice secreted lower levels of IL-4 and fewer IL-4 and GATA-3 expressing CD4+ T cells were present in the spleen of Cd155−/− mice. Our data suggest that CD155 regulates Th2 differentiation. Targeting of CD155 in immunization protocols using peptides may represent a promising new approach to boost protective humoral immunity in viral vaccines.
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Affiliation(s)
- Neha Kamran
- Immunology Programme, Department of Microbiology, National University of Singapore, Singapore, Singapore
- National University of Singapore Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Yoshimi Takai
- Division of Molecular and Cellular Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Jun Miyoshi
- Department of Molecular Biology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | | | - Justin S. B. Wong
- Immunology Programme, Department of Microbiology, National University of Singapore, Singapore, Singapore
| | - Stephan Gasser
- Immunology Programme, Department of Microbiology, National University of Singapore, Singapore, Singapore
- National University of Singapore Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- * E-mail:
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21
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Patterson R, Nerren J, Kogut M, Court P, Villarreal-Ramos B, Seyfert HM, Dalby P, Werling D. Yeast-surface expressed BVDV E2 protein induces a Th1/Th2 response in naïve T cells. Dev Comp Immunol 2012; 37:107-114. [PMID: 22067741 DOI: 10.1016/j.dci.2011.10.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 10/18/2011] [Accepted: 10/22/2011] [Indexed: 05/31/2023]
Abstract
Yeast species such as Saccharomyces cerevisiae are known to be potent activators of the immune system. S. cerevisiae activates the innate immune system by engaging pattern recognition receptors such as toll like receptor 2 (TLR2) and dectin-1. In the current project, we express the immunogenic envelope protein E2 of bovine viral diarrhoea virus (BVDV) on the surface of S. cerevisiae. After successful expression, components of the innate and adaptive immune response induced by the recombinant S. cerevisiaein vitro were analysed to determine if expression in yeast enhances the immunogenicity of the viral protein. Recombinant S. cerevisiae stimulated production of the chemokine CXCL-8 in primary bovine macrophages, but did no stimulate production of reactive oxygen species (ROS) in the same cells. Additionally, bovine macrophages primed with S. cerevisiae expressing viral envelope proteins had a greater capacity for stimulating proliferation of CD4+ T-cells from BVDV-free animals compared to macrophages primed with envelope protein alone or S. cerevisiae without envelope protein expression. Heat inactivation of recombinant S. cerevisiae increased ROS production and capacity to stimulate CD4+ T-cells in macrophages but did not alter CXCL-8 release compared to the live counter-part. Additionally, heat-inactivation of recombinant S. cerevisiae induced less INFγ and IL-4 but equal amounts of IL-10 compared to live yeast T-cell cultures. Our studies demonstrate a use for S. cerevisiae as a vehicle for transporting BVDV vaccine antigen to antigen-presenting cell in order to elicit cell-mediated immunity even in naïve animals.
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Affiliation(s)
- Robert Patterson
- Royal Veterinary College, Department of Pathology and Infectious Diseases, Hawkshead Lane, Hatfield AL9 7TA, UK
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22
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Meshkat Z, Soleimanjahi H, Mirshahabi H, Meshkat M, Kheirandish M, Hassan ZM. Strong immune responses induced by a DNA vaccine containing HPV16 truncated E7 C-terminal linked to HSP70 gene. Iran J Immunol 2011; 8:65-75. [PMID: 21705833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Vaccines capable of controlling tumor virus based infections are found difficult to develop due to the consistence latent infection in the host. DNA vaccines are attractive tools for the development of HPV vaccines and inducing antigen-specific immunity owing to the stability, simplicity of delivery, safety and cost effectiveness. However, there is a need to increase their potency by procedures such as using HSP70 gene as an adjuvant. OBJECTIVE To evaluate a DNA vaccine containing HPV16 truncated E7 C-terminal cytotoxic T-lymphocyte epitopes linked to HSP70 gene (HSP70-tE7) in an animal model. METHODS Mice were immunized with the plasmid DNA after pre-treatment with cardiotoxin. The splenocytes of immunized mice were then tested for CTL activity by detecting the apoptosis and necrosis in target cells, cytokine production by ELISA, CD4 and CD8 frequencies by flow cytometry, and lymphocyte stimulation by MTT assay. RESULTS The recombinant expression vector was able to elicit immune responses close to that of full length E7 complete gene. Although the use of a small part of a target antigen can induce immune responses equivalent to the full length antigen, it fails to elicit statistically significant stronger immune responses when fused with HSP70 compared to the complete E7 gene alone. CONCLUSION The potent immunogenicity of HPV16 E7 was preserved in the HSP70-tE7 vaccine and may represent a target of choice for the therapeutic vaccination strategies. However, to improve the immunogenicity polytope DNA vaccines which elicit multiple effector and memory CTL responses should be considered in future studies of DNA-based cancer vaccines.
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MESH Headings
- Adjuvants, Immunologic/genetics
- Adjuvants, Immunologic/metabolism
- Animals
- Cell Proliferation
- Cells, Cultured
- Cytokines/genetics
- Cytokines/metabolism
- Cytotoxicity, Immunologic/genetics
- Epitopes, T-Lymphocyte/genetics
- HSP70 Heat-Shock Proteins/genetics
- HSP70 Heat-Shock Proteins/metabolism
- Human papillomavirus 16/immunology
- Human papillomavirus 16/pathogenicity
- Humans
- Mice
- Mice, Inbred BALB C
- Papillomavirus E7 Proteins/genetics
- Papillomavirus E7 Proteins/metabolism
- Papillomavirus Infections/immunology
- Sequence Deletion/genetics
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- T-Lymphocytes, Cytotoxic/pathology
- T-Lymphocytes, Cytotoxic/virology
- Tumor Virus Infections/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/genetics
- Vaccines, DNA/metabolism
- Viral Vaccines/administration & dosage
- Viral Vaccines/genetics
- Viral Vaccines/metabolism
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Affiliation(s)
- Zahra Meshkat
- Department of Virology, Tarbiat Modares University, Tehran, Iran.
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23
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Richardson JS, Yao MK, Tran KN, Croyle MA, Strong JE, Feldmann H, Kobinger GP. Enhanced protection against Ebola virus mediated by an improved adenovirus-based vaccine. PLoS One 2009; 4:e5308. [PMID: 19390586 PMCID: PMC2669164 DOI: 10.1371/journal.pone.0005308] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2009] [Accepted: 03/22/2009] [Indexed: 11/29/2022] Open
Abstract
Background The Ebola virus is transmitted by direct contact with bodily fluids of infected individuals, eliciting death rates as high as 90% among infected humans. Currently, replication defective adenovirus-based Ebola vaccine is being studied in a phase I clinical trial. Another Ebola vaccine, based on an attenuated vesicular stomatitis virus has shown efficacy in post-exposure treatment of nonhuman primates to Ebola infection. In this report, we modified the common recombinant adenovirus serotype 5-based Ebola vaccine expressing the wild-type ZEBOV glycoprotein sequence from a CMV promoter (Ad-CMVZGP). The immune response elicited by this improved expression cassette vector (Ad-CAGoptZGP) and its ability to afford protection against lethal ZEBOV challenge in mice was compared to the standard Ad-CMVZGP vector. Methodology/Principal Findings Ad-CMVZGP was previously shown to protect mice, guinea pigs and nonhuman primates from an otherwise lethal challenge of Zaire ebolavirus. The antigenic expression cassette of this vector was improved through codon optimization, inclusion of a consensus Kozak sequence and reconfiguration of a CAG promoter (Ad-CAGoptZGP). Expression of GP from Ad-CAGoptZGP was substantially higher than from Ad-CMVZGP. Ad-CAGoptZGP significantly improved T and B cell responses at doses 10 to 100-fold lower than that needed with Ad-CMVZGP. Additionally, Ad-CAGoptZGP afforded full protections in mice against lethal challenge at a dose 100 times lower than the dose required for Ad-CMVZGP. Finally, Ad-CAGoptZGP induced full protection to mice when given 30 minutes post-challenge. Conclusions/Significance We describe an improved adenovirus-based Ebola vaccine capable of affording post-exposure protection against lethal challenge in mice. The molecular modifications of the new improved vaccine also translated in the induction of significantly enhanced immune responses and complete protection at a dose 100 times lower than with the previous generation adenovirus-based Ebola vaccine. Understanding and improving the molecular components of adenovirus-based vaccines can produce potent, optimized product, useful for vaccination and post-exposure therapy.
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Affiliation(s)
- Jason S. Richardson
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Michel K. Yao
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kaylie N. Tran
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Maria A. Croyle
- Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin, Austin, Texas, United States of America
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas, United States of America
| | - James E. Strong
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Heinz Feldmann
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Gary P. Kobinger
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
- * E-mail:
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24
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Zhou J, Ji G, Wen JN, Li J, Sheng W, Guo ZQ, Liao GY, Jiang SD, Sun MB. [Effective inactivatian test of inactivated hepatitis A vaccine using integrated cell culture/strand-specific reverse transcriptase-polymerase chain reaction]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2008; 22:488-491. [PMID: 19544655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To establish an quick, sensitive and specific assay for effective inactivatian test of inactivated hepatitis A vaccine. METHODS effective inactivatian test of inactivated hepatitis A vaccine were carried out using integrated cell culture/strand-specific RT-PCR (ICC/strand-specific RT-PCR) assay compared with traditional ELISA and nest RT-PCR assay. RESULTS all the samples were infectious negative detecting by both ICC/ strand-specific RT-PCR and ELISA assay,while some samples appeared false positive detecting by nest RT-PCR. CONCLUSION ICC/strand-specific RT-PCR assay is a novel, rapid, sensitive and reliable method for effective inactivatian test of inactivated hepatitis A vaccine. Shorting detection period largely, this assay may be used as an alternative method for routine inactivated hepatitis A vaccines test.
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Affiliation(s)
- Jian Zhou
- Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
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25
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Ha YM, Soo-Jung G, Thi-Hoai N, Ra CH, Kim KH, Nam YK, Kim SK. Vaccination of shrimp (Penaeus chinensis) against white spot syndrome virus (WSSV). J Microbiol Biotechnol 2008; 18:964-967. [PMID: 18633299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Two structural protein genes, VP19 and VP466, of white spot syndrome virus (WSSV) were cloned and expressed in Sf21 insect cells using a baculovirus expression system for the development of injection and oral feeding vaccines against WSSV for shrimps. The cumulative mortalities of the shrimps vaccinated by the injection of rVP19 and rVP466 at 15 days after the challenge with WSSV were 50.2% and 51.8%, respectively. For the vaccination by oral feeding of rVP19 and rVP466, the cumulative mortalities were 49.2% and 89.2%, respectively. These results show that protection against WSSV can be generated in the shrimp, using the viral structural protein as a protein vaccine.
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Affiliation(s)
- Yu-Mi Ha
- Department of Biotechnology and Bioengineering,Pukyong National University, Busan 608-737, Korea
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26
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Wu J, Yu L, Li L, Hu J, Zhou J, Zhou X. Oral immunization with transgenic rice seeds expressing VP2 protein of infectious bursal disease virus induces protective immune responses in chickens. Plant Biotechnol J 2007; 5:570-8. [PMID: 17561926 DOI: 10.1111/j.1467-7652.2007.00270.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The expression of infectious bursal disease virus (IBDV) host-protective immunogen VP2 protein in rice seeds, its immunogenicity and protective capability in chickens were investigated. The VP2 cDNA of IBDV strain ZJ2000 was cloned downstream of the Gt1 promoter of the rice glutelin GluA-2 gene in the binary expression vector, pCambia1301-Gt1. Agrobacterium tumefaciens containing the recombinant vector was used to transform rice embryogenic calli, and 121 transgenic lines were obtained and grown to maturity in a greenhouse. The expression level of VP2 protein in transgenic rice seeds varied from 0.678% to 4.521% microg/mg of the total soluble seed protein. Specific pathogen-free chickens orally vaccinated with transgenic rice seeds expressing VP2 protein produced neutralizing antibodies against IBDV and were protected when challenged with a highly virulent IBDV strain, BC6/85. These results demonstrate that transgenic rice seeds expressing IBDV VP2 can be used as an effective, safe and inexpensive vaccine against IBDV.
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Affiliation(s)
- Jianxiang Wu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 31009, China
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27
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Gasteiger G, Kastenmuller W, Ljapoci R, Sutter G, Drexler I. Cross-priming of cytotoxic T cells dictates antigen requisites for modified vaccinia virus Ankara vector vaccines. J Virol 2007; 81:11925-36. [PMID: 17699574 PMCID: PMC2168793 DOI: 10.1128/jvi.00903-07] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Recombinant vaccines based on modified vaccinia virus Ankara (MVA) have an excellent record concerning safety and immunogenicity and are currently being evaluated in numerous clinical studies for immunotherapy of infectious diseases and cancer. However, knowledge about the biological properties of target antigens to efficiently induce MVA vaccine-mediated immunity in vivo is sparse. Here, we examined distinct antigen presentation pathways and different antigen formulations contained in MVA vaccines for their capability to induce cytotoxic CD8(+) T-cell (CTL) responses. Strikingly, we found that CTL responses against MVA-produced antigens were dominated by cross-priming in vivo, despite the ability of the virus to efficiently infect professional antigen-presenting cells such as dendritic cells. Moreover, stable mature protein was preferred to preprocessed antigen as the substrate for cross-priming. Our data are essential for improved MVA vaccine design, as they demonstrate the need for optimal adjustment of the target antigen properties to the intrinsic requirements of the delivering vector system.
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Affiliation(s)
- Georg Gasteiger
- GSF-Institute for Molecular Virology, Schneckenburgerstrasse 8, D-81675 Munich, Germany
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28
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Sheng C, Xiao M, Geng X, Liu J, Wang Y, Gu F. Characterization of interaction of classical swine fever virus NS3 helicase with 3' untranslated region. Virus Res 2007; 129:43-53. [PMID: 17566586 DOI: 10.1016/j.virusres.2007.05.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2007] [Revised: 05/03/2007] [Accepted: 05/04/2007] [Indexed: 11/24/2022]
Abstract
The classical swine fever virus (CSFV) full-length NS3 protein (NS3F) and the truncated NS3 protein (NS3H) with postulated helicase domain were expressed and demonstrated to have helicase activity. Further, the electrophoretic mobility shift assays containing NS3H and the viral 3' terminal sequences showed that NS3H specifically bound to the plus- and minus-strand 3'UTR. The minus-strand 3'UTR had higher binding activity. The 21-nt fragments at the 3'-most terminal sequences of both 3'UTRs were essential to NS3H binding. A 12-nt insertion, CUUUUUUCUUUU, present in the 3'UTR of a CSFV live attenuated vaccine strain, was also found to be deleterious to helicase binding. Intact secondary structure of 3' terminal sequence of 3'UTR might be important in helicase binding. Our results show that interaction between the helicase and the viral 3'UTR is similar to that between the replicase and the 3'UTR, suggesting that NS3 helicase is important for CSFV genomic replication.
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Affiliation(s)
- Chun Sheng
- College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200234, China
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29
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Zhu W, Fang Q, Zhuang K, Wang H, Yu W, Zhou J, Liu L, Tien P, Zhang L, Chen Z. The attenuation of vaccinia Tian Tan strain by the removal of the viral M1L-K2L genes. J Virol Methods 2007; 144:17-26. [PMID: 17459491 PMCID: PMC7112875 DOI: 10.1016/j.jviromet.2007.03.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2006] [Revised: 03/12/2007] [Accepted: 03/14/2007] [Indexed: 11/25/2022]
Abstract
To generate a safe vaccinia Tian Tan (VTT)-based vaccine vector, it is necessary to develop a method to attenuate the virus. A modified VTT (MVTT(2-GFP)) was constructed by replacing the viral M1L-K2L genes with a GFP gene. In comparison to the parental VTT, MVTT(2-GFP) lost its replication capacity in rabbit RK13 and human HeLa cell lines. The life cycle of viral replication was blocked at different stages in these two cell lines as determined by electron microscope examination. MVTT(2-GFP) was less virulent than VTT for 100-fold by measuring mouse body weight loss after intranasal viral inoculation and for 340-fold by determining the intracranial LD(50) value in mice. The foreign GFP gene was stable genetically after 10 rounds of passage in Vero cells. Importantly, MVTT(2-GFP) elicited both humoral and cell-mediated immune responses to the GFP gene in mice. With two intramuscular inoculations of 10(5)PFU virus, the anti-GFP antibody reciprocal endpoint titer reached over 700 as determined by an ELISA. The number of IFN-gamma secreting T cells reached over 350SFU per million splenocytes against a CD8+ T cell-specific epitope of GFP. Collectively, the removal of the M1L-K2L genes is a useful method to generate an attenuated vaccinia Tian Tan vaccine vector.
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Affiliation(s)
- Weijun Zhu
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Qing Fang
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Ke Zhuang
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Haibo Wang
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Wenbo Yu
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Jingying Zhou
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Li Liu
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Po Tien
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
| | - Linqi Zhang
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
- Aaron Diamond AIDS Research Center, The Rockefeller University, New York, NY 10016, USA
- AIDS Research Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, PR China
| | - Zhiwei Chen
- Modern Virology Research Center and AIDS Center, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Hubei 430072, PR China
- Aaron Diamond AIDS Research Center, The Rockefeller University, New York, NY 10016, USA
- Corresponding author at: Aaron Diamond AIDS Research Center, 455 First Avenue, New York, NY 10016, USA. Tel.: +1 212 448 5031; fax: +1 212 725 1126.
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30
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Companjen AR, Florack DEA, Slootweg T, Borst JW, Rombout JHWM. Improved uptake of plant-derived LTB-linked proteins in carp gut and induction of specific humoral immune responses upon infeed delivery. Fish Shellfish Immunol 2006; 21:251-60. [PMID: 16464614 DOI: 10.1016/j.fsi.2005.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 08/10/2005] [Accepted: 12/08/2005] [Indexed: 05/06/2023]
Abstract
Oral vaccination of fish is an effortless and stress free immunisation method which can be used for almost any age. However, vaccination via the mucosal route does have disadvantages. For example, the vaccine may induce tolerance and has to be protected to escape digestion. Also the vaccine should be efficiently delivered to immune-competent cells in the gut or other lymphoid organs. In addition, it should be cost effective. Here we present a novel fish vaccination model using potato tubers as vaccine production and delivery system. The model vaccines discussed here include fusion proteins consisting of a gut adhesion molecule (LTB) and a viral peptide or green fluorescent protein (GFP) expressed in potato tubers. The adhesion molecule mediates binding to and uptake from the gut, whereas the viral peptide or GFP functions as model vaccine antigen provoking the induction of an immune response. We demonstrate that fusion to LTB facilitates an elevated uptake of the model vaccines in carp gut mucosa. The plant-derived fusion proteins also elicit a specific systemic humoral immune response upon oral application of crude tuber material incorporated into a standard dietary feed pellet. The data presented here show the promising potentials of the plant as a production system for oral vaccines in aquaculture and feed mediated immunisation of fish.
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Affiliation(s)
- A R Companjen
- Cell Biology and Immunology Group, Department of Animal Sciences, PO Box 338, Wageningen University and Research Centre, 6700 AH Wageningen, The Netherlands
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31
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Bredenbeek PJ, Molenkamp R, Spaan WJ, Deubel V, Marianneau P, Salvato MS, Moshkoff D, Zapata J, Tikhonov I, Patterson J, Carrion R, Ticer A, Brasky K, Lukashevich IS. A recombinant Yellow Fever 17D vaccine expressing Lassa virus glycoproteins. Virology 2006; 345:299-304. [PMID: 16412488 PMCID: PMC1388090 DOI: 10.1016/j.virol.2005.12.001] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2005] [Revised: 11/07/2005] [Accepted: 12/02/2005] [Indexed: 11/29/2022]
Abstract
The Yellow Fever Vaccine 17D (YFV17D) has been used as a vector for the Lassa virus glycoprotein precursor (LASV-GPC) resulting in construction of YFV17D/LASV-GPC recombinant virus. The virus was replication-competent and processed the LASV-GPC in cell cultures. The recombinant replicated poorly in guinea pigs but still elicited specific antibodies against LASV and YFV17D antigens. A single subcutaneous injection of the recombinant vaccine protected strain 13 guinea pigs against fatal Lassa Fever. This study demonstrates the potential to develop an YFV17D-based bivalent vaccine against two viruses that are endemic in the same area of Africa.
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Affiliation(s)
- Peter J. Bredenbeek
- Department of Medical Microbiology, Center for Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Richard Molenkamp
- Department of Medical Microbiology, Center for Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Willy J.M. Spaan
- Department of Medical Microbiology, Center for Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Vincent Deubel
- Unité de Biologie des Infectious Virales Emergentes, Centre de Recherche Mériuex-Pasteur á Lyon, Laboratoire P4-Jean Mérieux, Lyon, France
| | - Phillippe Marianneau
- Unité de Biologie des Infectious Virales Emergentes, Centre de Recherche Mériuex-Pasteur á Lyon, Laboratoire P4-Jean Mérieux, Lyon, France
| | - Maria S. Salvato
- Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
| | - Dmitry Moshkoff
- Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
| | - Juan Zapata
- Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
| | - Ilia Tikhonov
- Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
| | - Jean Patterson
- Department of Virology and Immunology, Southwest Foundation for Biomedical Research, San Antonio, TX 78245-0549, USA
| | - Ricardo Carrion
- Department of Virology and Immunology, Southwest Foundation for Biomedical Research, San Antonio, TX 78245-0549, USA
| | - Anysha Ticer
- Department of Virology and Immunology, Southwest Foundation for Biomedical Research, San Antonio, TX 78245-0549, USA
| | - Kathleen Brasky
- Department of Virology and Immunology, Southwest Foundation for Biomedical Research, San Antonio, TX 78245-0549, USA
| | - Igor S. Lukashevich
- Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
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32
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Affiliation(s)
- Stanley Perlman
- Department of Pediatrics, University of Iowa, 52242 Iowa City, IA USA
| | - Kathryn V. Holmes
- Department of Microbiology, University of Colorado Health Sciences Center at Fitzsimons, 80045-8333 Aurora, CO USA
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34
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Zhang HY, Sun SH, Guo YJ, Chen ZH, Huang L, Gao YJ, Wan B, Zhu WJ, Xu GX, Wang JJ. Tissue distribution of a plasmid DNA containing epitopes of foot-and-mouth disease virus in mice. Vaccine 2005; 23:5632-40. [PMID: 16125283 DOI: 10.1016/j.vaccine.2005.06.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2004] [Accepted: 06/01/2005] [Indexed: 11/29/2022]
Abstract
It is known that only the minority of plasmid DNAs effect a cure or prevention after intramuscular injection into host. But what is the fate of the majority? And indeed how many of the injected DNAs work? Till now, little is known about it. To answer these questions, two methods including PCR and autoradiography were used in distribution study in mice that had received a single muscular inoculation of plasmid DNA containing antigenic epitopes of foot-and-mouth disease virus. The results showed that the plasmid DNAs were distributed by blood circulation and degraded soon. The degradation ratio of super coiled plasmid DNA was 20.9% in 10 min, 34.1% in 1h, 86.8% in 1 day and 97.8% in 1 week in sera in vivo. And over a half of the whole were output in urine and faeces. The rest resided most in muscles as 'antigen pool', next in immune organs, kidney, liver, heart, lung and little in brain or gonad. About 40% or 0.5% of total plasmid DNAs, inferring to be effective, resided in muscles or immune organs, respectively. Collective results suggested that 'nude' DNA, as water injection, was characterized as quick absorbent, extensive distribution, but low utilization rate. Finally, the immune mechanism for the DNA vaccine was discussed.
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Affiliation(s)
- Hong-Ying Zhang
- Department of Biological Science and Technology and the State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing 210093, China.
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35
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Jiang WZ, Jin NY, Li ZJ, Zhang LS, Zou XH, Wang TD. [Selection of recombinant fowlpox virus coexpressing HIV-1 gag-gp120 and IL-6]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2005; 19:267-70. [PMID: 16261213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVE To construct the recombinant fowlpox virus (rFPV) coexpressing HIV-1 gag-gp120 and hIL-6. METHODS The recombinant expressing plasmid pUTA-GE-IL6 was successfully constructed by inserting gag-gp120 gene and hIL-6 gene into the downstream of the combined promoter ATI-p7.5 and p7.5 tandem promoter respectively. After transfecting the plasmid into chicken embryonic fibroblast (CEF) cells preinfected with FPV 282E4 strain and selecting the recombinant virus under the pressure of BUdR. The recombinant virus was analyzed by nucleic acid probe hybridization and immunoblotting. In addition, the formation of virus-like particle and the expression of interested proteins in the recombinant virus-infected p815 cells were observed, and the immunogenicity of the recombinant virus was also analyzed. RESULTS There was colorable dot for the positive recombinant virus, immunoblotting analysis showed that the recombinant virus could expressed both gag-gp120 and IL-6. Virus-like particles (VLP) were formed in virus-infected cells, and the interested proteins could be expressed in mammalian cells infected by the recombinant virus. The immunity index from the immunized mice showed that the recombinant virus had good immunogenicity. CONCLUSION The recombinant fowlpox virus coexpressing gag-gp120 and IL-6 was successfully constructed, which may provide basis for the preparation of live vector genetic engineering vaccine and macromolecule particle vaccine against HIV-1.
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Affiliation(s)
- Wen-zheng Jiang
- Key Laboratory of Genetic Engineering of PLA, Quartermaster University of PLA, Changchun 130062, China
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36
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Ramakrishnan MA, Singh KP, Pandey AB, Singh R, Nandi S, Mehrotra ML. Genomic diversity of Indian isolates of bluetongue virus. Acta Virol 2005; 49:285-6. [PMID: 16402688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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37
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Companjen AR, Florack DEA, Bastiaans JHMW, Matos CI, Bosch D, Rombout JHWM. Development of a cost-effective oral vaccination method against viral disease in fish. Dev Biol (Basel) 2005; 121:143-50. [PMID: 15962477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Different vaccination methods have been applied to protect fish against the detrimental effects of various pathogens. Several studies have shown the potentials of oral vaccination. In theory oral vaccination is an effortless and stress-free method which can be applied at almost any age. In general, however, the vaccine has to be protected to avoid digestion, which results in high costs for application in aquaculture. In this paper we introduce a cost-effective oral vaccination strategy for viral diseases of fish. The vaccines discussed here include fusion proteins consisting of a gut adhesion molecule and a viral peptide expressed in plants. The adhesion molecule mediates binding to and uptake from the gut, whereas the viral peptide functions as vaccine antigen mediating the induction of a humoral immune response. The first pilot studies using a fusion of the gut adhesion molecule and well-characterised heterologous linear B- and T-cell viral epitopes, produced in potato tubers, showed a promising binding and subsequent uptake in the end gut of carp. The results further indicated that a specific humoral immune response was evoked.
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Affiliation(s)
- A R Companjen
- Wageningen University and Research Centre: Department of Animal Sciences, Cell Biology and Immunology Group, The Netherlands.
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38
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Dieye Y, Hoekman AJW, Clier F, Juillard V, Boot HJ, Piard JC. Ability of Lactococcus lactis to export viral capsid antigens: a crucial step for development of live vaccines. Appl Environ Microbiol 2004; 69:7281-8. [PMID: 14660377 PMCID: PMC309906 DOI: 10.1128/aem.69.12.7281-7288.2003] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The food grade bacterium Lactococcus lactis is a potential vehicle for protein delivery in the gastrointestinal tract. As a model, we constructed lactococcal strains producing antigens of infectious bursal disease virus (IBDV). IBDV infects chickens and causes depletion of B-lymphoid cells in the bursa of Fabricius and subsequent immunosuppression, morbidity, or acute mortality. The two major IBDV antigens, i.e., VP2 and VP3, that form the viral capsid were expressed and targeted to the cytoplasm, the cell wall, or the extracellular compartment of L. lactis. Whereas VP3 was successfully targeted to the three compartments by the use of relevant expression and export vectors, VP2 was recalcitrant to export, thus confirming the difficulty of translocating naturally nonsecreted proteins across the bacterial membrane. This defect could be partly overcome by fusing VP2 to a naturally secreted protein (the staphylococcal nuclease Nuc) that carried VP2 through the membrane. Lactococcal strains producing Nuc-VP2 and VP3 in various bacterial compartments were administered orally to chickens. The chickens did not develop any detectable immune response against VP2 and VP3 but did exhibit an immune response against Nuc when Nuc-VP2 was anchored to the cell wall of lactococci.
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Affiliation(s)
- Yakhya Dieye
- Useful Bacterial Surface Proteins, INRA-URLGA, 78352 Jouy-en-Josas Cedex, France
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39
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Jourdier TM, Moste C, Bonnet MC, Delisle F, Tafani JP, Devauchelle P, Tartaglia J, Moingeon P. Local immunotherapy of spontaneous feline fibrosarcomas using recombinant poxviruses expressing interleukin 2 (IL2). Gene Ther 2004; 10:2126-32. [PMID: 14625567 DOI: 10.1038/sj.gt.3302124] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We tested the canarypox virus vector ALVAC and the genetically attenuated vaccinia virus vector NYVAC as vehicles for achieving local immunomodulation in domestic animals bearing spontaneous tumours. Following intratumoral administration of ALVAC-, or NYVAC-luciferase in dogs with melanoma, it was demonstrated that viral recombinants remained localized along the needle track, with no virus detectable in the periphery of the tumour. Given these distribution characteristics and their well-documented safety profile, ALVAC- or NYVAC-based recombinants expressing feline or human IL2, respectively, were administered to domestic cats, in order to prevent the recurrence of spontaneous fibrosarcomas. In the absence of immunotherapy, tumour recurrence was observed in 61% of animals within a 12-month follow-up period after treatment with surgery and iridium-based radiotherapy. In contrast, only 39 and 28% of cats receiving either NYVAC-human IL2 or ALVAC-feline IL2, respectively, exhibited tumour recurrences. Based on such results, and in the context of ongoing clinical studies conducted in humans, we discuss the utilization of ALVAC- or NYVAC-based recombinants as viable therapeutic modalities for local immunotherapy or therapeutic vaccination against cancer, both in humans and companion animals.
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Affiliation(s)
- T-M Jourdier
- Département Recherche et Développement, Aventis Pasteur, Campus Merieux, 1541 Avenue Marcel Merieux, Marcy l'Etoile, France
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40
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Armandola E. Conference report - global vaccines - what are the challenges? Highlights from the Viral Vaccine Meeting; October 25-28, 2003; Barcelona, Spain. MedGenMed 2003; 5:29. [PMID: 14745376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
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41
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Storni T, Ruedl C, Renner WA, Bachmann MF. Innate immunity together with duration of antigen persistence regulate effector T cell induction. J Immunol 2003; 171:795-801. [PMID: 12847247 DOI: 10.4049/jimmunol.171.2.795] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Proliferation of T cells is important for the expansion of specific T cell clones during immune responses. In addition, for the establishment of protective immunity against viruses, bacteria, and tumors, the expanded T cells must differentiate into effector T cells. Here we show that effector T cell generation is driven by activation of APCs and duration of antigenic stimulation. Adoptively transferred TCR-transgenic T cells extensively proliferated upon immunization. However, these T cells failed to differentiate into effector cells and died within 1 wk after immunization unless antigenic peptides persisted for >1 day or were presented by activated APCs. The induction of protective immunity in a nontransgenic system was more stringent, since activation of APCs or prolonged Ag persistence alone was not sufficient to drive immunity. In contrast, Ag had to be presented for several days by activated APCs to trigger protective T cell responses. Thus, activation of APCs and duration of Ag presentation together regulate the induction of protective T cell responses.
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MESH Headings
- Animals
- Antigen Presentation/genetics
- Antigen Presentation/immunology
- Antigens, CD/biosynthesis
- Antigens, Differentiation, T-Lymphocyte/biosynthesis
- Antigens, Viral/administration & dosage
- Antigens, Viral/immunology
- Antigens, Viral/metabolism
- Biomarkers/analysis
- Cell Division/genetics
- Cell Division/immunology
- Female
- Glycoproteins/administration & dosage
- Glycoproteins/immunology
- Glycoproteins/metabolism
- Hyaluronan Receptors/biosynthesis
- Immunity, Innate/genetics
- Lectins, C-Type
- Lymphocyte Activation/genetics
- Lymphocytic choriomeningitis virus/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Peptide Fragments/administration & dosage
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Receptors, Interleukin-2/biosynthesis
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- T-Lymphocyte Subsets/virology
- Time Factors
- Up-Regulation/genetics
- Up-Regulation/immunology
- Viral Proteins/administration & dosage
- Viral Proteins/immunology
- Viral Proteins/metabolism
- Viral Vaccines/administration & dosage
- Viral Vaccines/immunology
- Viral Vaccines/metabolism
- Virion/immunology
- Virion/metabolism
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Affiliation(s)
- Tazio Storni
- Cytos Biotechnology, Schlieren-Zurich, Switzerland
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42
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Edwards SJ, Dix BR, Myers CJ, Dobson-Le D, Huschtscha L, Hibma M, Royds J, Braithwaite AW. Evidence that replication of the antitumor adenovirus ONYX-015 is not controlled by the p53 and p14(ARF) tumor suppressor genes. J Virol 2002; 76:12483-90. [PMID: 12438574 PMCID: PMC136704 DOI: 10.1128/jvi.76.24.12483-12490.2002] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The adenovirus mutant ONYX-015 is in phase III clinical trials as a novel antitumor therapy. Its apparent efficacy is thought to be due to its ability to replicate selectively in tumor cells defective in the signaling pathway for p53. Recent data have shown that p14(ARF), a positive regulator of p53, inhibits ONYX-015 replication in cells with a wild-type p53, a phenotype that characterizes normal cells. We, however, found that ONYX-015 activates p53 in tumor cells and in normal cells and that this can occur without p14(ARF) induction. We also show that ONYX-015 is not attenuated in cells with functional p53, whether or not p14(ARF) is expressed, and that where attenuation does occur, it is cell type specific.
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Affiliation(s)
- Sara J Edwards
- Departments of Pathology, University of Otago, Dunedin, New Zealand
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43
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Mohan KVK, Ghebrehiwet B, Atreya CD. The N-terminal conserved domain of rubella virus capsid interacts with the C-terminal region of cellular p32 and overexpression of p32 enhances the viral infectivity. Virus Res 2002; 85:151-61. [PMID: 12034482 DOI: 10.1016/s0168-1702(02)00030-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cellular 'defense collagens' are produced to launch virus-specific responses to clear the invading viruses. Cellular p32, the C1q binding protein is one such protein. In this report, we identified the interaction of p32 derived from a human lung diploid cell line (WI-38) with rubella virus capsid (RVCP from Therien strain) N-terminal 28-amino acid domain, which is conserved among several RV strains including the vaccine strains. We further identified that the C-terminal 69 aa of the mature p32 is sufficient to interact with the CP. In addition, we observed that in three independent Vero 76-derived cell lines constitutively overexpressing p32, the RV infectivity was enhanced. Our results suggest that RV has evolved a strategy whereby one of its proteins is recruited to interact with, and exploit the cellular defense machinery to its advantage.
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Affiliation(s)
- Ketha V Krishna Mohan
- Laboratory of Pediatric and Respiratory Viral diseases, Division of Viral Products, Section of Viral Pathogenesis and Adverse Reactions, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD 20892, USA
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44
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Ruitenberg KM, Gilkerson JR, Wellington JE, Love DN, Whalley JM. Equine herpesvirus 1 glycoprotein D expressed in Pichia pastoris is hyperglycosylated and elicits a protective immune response in the mouse model of EHV-1 disease. Virus Res 2001; 79:125-35. [PMID: 11551653 DOI: 10.1016/s0168-1702(01)00337-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Equine herpesvirus 1 glycoprotein D (EHV-1 gD) has been shown in mouse models and in the natural host to have potential as a subunit vaccine, using various expression systems that included Escherichia coli, baculovirus and plasmid DNA. With the aim of producing secreted recombinant protein, we have cloned and expressed EHV-1 gD, lacking its native signal sequence and C-terminal transmembrane region, into the methylotrophic yeast Pichia pastoris. The truncated glycoprotein D (gD) gene was placed under the control of the methanol inducible alcohol oxidase 1 promoter and directed for secretion with the Saccharomyces cerevisiae alpha-factor prepro secretion signal. SDS-PAGE and Western blot analysis of culture supernatant fluid 24 h after induction revealed gD-specific protein products between 40 and 200 kDa. After treatment with PNGase F and Endo H, three predominant bands of 34, 45 and 48 kDa were detected, confirming high mannose N-linked glycosylation of Pichia-expressed gD (Pic-gD). N-terminal sequence analysis of PNGase F-treated affinity-purified protein showed that the native signal cleavage site of gD was being recognised by P. pastoris and the 34 kDa band could be explained by internal proteolytic cleavage effected by a putative Kex2-like protease. Pic-gD, when used in a DNA prime/protein boost inoculation schedule, induced high EHV-1 ELISA and virus neutralizing antibodies and provided protection from challenge infection in BALB/c mice.
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MESH Headings
- Animals
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Antigens, Viral/isolation & purification
- Antigens, Viral/metabolism
- Disease Models, Animal
- Female
- Gene Expression
- Glycosylation
- Herpesviridae Infections/prevention & control
- Herpesvirus 1, Equid/genetics
- Herpesvirus 1, Equid/immunology
- Horses/virology
- Mice
- Mice, Inbred BALB C
- Pichia/metabolism
- Vaccination
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/isolation & purification
- Vaccines, Synthetic/metabolism
- Viral Envelope Proteins/genetics
- Viral Envelope Proteins/immunology
- Viral Envelope Proteins/isolation & purification
- Viral Envelope Proteins/metabolism
- Viral Vaccines/genetics
- Viral Vaccines/immunology
- Viral Vaccines/isolation & purification
- Viral Vaccines/metabolism
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Affiliation(s)
- K M Ruitenberg
- Department of Biological Sciences, Division of Environmental and Life Sciences, Macquarie University, NSW 2109, Sydney, Australia
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45
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Ledwith BJ, Manam S, Troilo PJ, Barnum AB, Pauley CJ, Griffiths TG, Harper LB, Beare CM, Bagdon WJ, Nichols WW. Plasmid DNA vaccines: investigation of integration into host cellular DNA following intramuscular injection in mice. Intervirology 2001; 43:258-72. [PMID: 11251381 DOI: 10.1159/000053993] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The primary safety concern for DNA vaccines is their potential to integrate into the host cell genome. We describe an integration assay based on purification of high-molecular-weight genomic DNA away from free plasmid using gel electrophoresis, such that the genomic DNA can then be assayed for integrated plasmid using a sensitive PCR method. The assay sensitivity was approximately 1 plasmid copy/microg DNA (representing approximately 150,000 diploid cells). Using this assay, we carried out integration studies of three different plasmid DNA vaccines, containing either the influenza hemagglutinin, influenza matrix or HIV gag gene. Six weeks after intramuscular injection, free plasmid was detected in treated muscle at levels ranging from approximately 1,000 to 4,000 copies/microg DNA. At 6 months, the plasmid levels ranged between 200 and 800 copies/microg DNA. Gel purification of genomic DNA revealed that essentially all of the detectable plasmid in treated quadriceps was extrachromosomal. If integration had occurred, the frequency was </= 1-8 integrations per 150,000 diploid cells, which would be at least three orders of magnitude below the spontaneous mutation rate. Our results suggest that the risk of mutation due to integration of plasmid DNA vaccines following intramuscular injection is negligible.
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Affiliation(s)
- B J Ledwith
- Department of Safety Assessment, Merck Research Laboratories, West Point, PA 19486, USA.
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46
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Abstract
The icosahedral nucleocapsid of hepatitis B virus (HBV) consists of multiple subunits of a single 183 amino acids (aa) core protein encasing the viral genome. However, recombinant core protein alone also forms capsid-like particles. We have recently shown that a 238 aa protein centrally inserted into the core protein can be displayed on the particle surface. Here we demonstrate that replacement of the C-terminal basic domain by the 17 kDa Staphylococcus aureus nuclease also yields particles but that in these the foreign domains are located in the interior. The packaged nuclease is enzymatically active, and the chimeric protein forms mosaic particles with the wild-type core protein. Hence the HBV capsid is useful as a molecular platform which, dependent on the fusion site, allows foreign protein domains to either be packaged into or be exposed on the exterior of the particle. These results are of relevance for the use of the HBV capsid as a vaccine carrier, and as a target for antiviral therapy.
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Affiliation(s)
- G Beterams
- University Hospital Freiburg, Department of Internal Medicine II, Molecular Biology, Hugstetter Str. 55, D-79107 Freiburg, Germany
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47
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Leachman SA, Tigelaar RE, Shlyankevich M, Slade MD, Irwin M, Chang E, Wu TC, Xiao W, Pazhani S, Zelterman D, Brandsma JL. Granulocyte-macrophage colony-stimulating factor priming plus papillomavirus E6 DNA vaccination: effects on papilloma formation and regression in the cottontail rabbit papillomavirus--rabbit model. J Virol 2000; 74:8700-8. [PMID: 10954571 PMCID: PMC116381 DOI: 10.1128/jvi.74.18.8700-8708.2000] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A cottontail rabbit papillomavirus (CRPV) E6 DNA vaccine that induces significant protection against CRPV challenge was used in a superior vaccination regimen in which the cutaneous sites of vaccination were primed with an expression vector encoding granulocyte-macrophage colony-stimulating factor (GM-CSF), a cytokine that induces differentiation and local recruitment of professional antigen-presenting cells. This treatment induced a massive influx of major histocompatibility complex class II-positive cells. In a vaccination-challenge experiment, rabbit groups were treated by E6 DNA vaccination, GM-CSF DNA inoculation, or a combination of both treatments. After two immunizations, rabbits were challenged with CRPV at low, moderate, and high stringencies and monitored for papilloma formation. As expected, all clinical outcomes were monotonically related to the stringency of the viral challenge. The results demonstrate that GM-CSF priming greatly augmented the effects of CRPV E6 vaccination. First, challenge sites in control rabbits (at the moderate challenge stringency) had a 0% probability of remaining disease free, versus a 50% probability in E6-vaccinated rabbits, and whereas GM-CSF alone had no effect, the interaction between GM-CSF priming and E6 vaccination increased disease-free survival to 67%. Second, the incubation period before papilloma onset was lengthened by E6 DNA vaccination alone or to some extent by GM-CSF DNA inoculation alone, and the combination of treatments induced additive effects. Third, the rate of papilloma growth was reduced by E6 vaccination and, to a lesser extent, by GM-CSF treatment. In addition, the interaction between the E6 and GM-CSF treatments was synergistic and yielded more than a 99% reduction in papilloma volume. Finally, regression occurred among the papillomas that formed in rabbits treated with the E6 vaccine and/or with GM-CSF, with the highest regression frequency occurring in rabbits that received the combination treatment.
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Affiliation(s)
- S A Leachman
- Department of Dermatology, School of Medicine, Yale University, New Haven, Connecticut 06520, USA
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48
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Tao T, Skiadopoulos MH, Davoodi F, Riggs JM, Collins PL, Murphy BR. Replacement of the ectodomains of the hemagglutinin-neuraminidase and fusion glycoproteins of recombinant parainfluenza virus type 3 (PIV3) with their counterparts from PIV2 yields attenuated PIV2 vaccine candidates. J Virol 2000; 74:6448-58. [PMID: 10864657 PMCID: PMC112153 DOI: 10.1128/jvi.74.14.6448-6458.2000] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We sought to develop a live attenuated parainfluenza virus type 2 (PIV2) vaccine strain for use in infants and young children, using reverse genetic techniques that previously were used to rapidly produce a live attenuated PIV1 vaccine candidate. The PIV1 vaccine candidate, designated rPIV3-1cp45, was generated by substituting the full-length HN and F proteins of PIV1 for those of PIV3 in the attenuated cp45 PIV3 vaccine candidate (T. Tao et al., J. Virol. 72:2955-2961, 1998; M. H. Skiadopoulos et al., Vaccine 18:503-510, 1999). However, using the same strategy, we failed to recover recombinant chimeric PIV3-PIV2 isolate carrying the full-length PIV2 glycoproteins in a wild-type PIV3 backbone. Viable PIV3-PIV2 chimeras were recovered when chimeric HN and F open reading frames (ORFs) rather than complete PIV2 F and HN ORFs were used to construct the full-length cDNA. The recovered viruses, designated rPIV3-2CT, in which the PIV2 ectodomain and transmembrane domain were fused to the PIV3 cytoplasmic domain, and rPIV3-2TM, in which the PIV2 ectodomain was fused to the PIV3 transmembrane and cytoplasmic tail domain, possessed similar in vitro and in vivo phenotypes. Thus, it appeared that only the cytoplasmic tail of the HN or F glycoprotein of PIV3 was required for successful recovery of PIV3-PIV2 chimeras. Although rPIV3-2CT and rPIV3-2TM replicated efficiently in vitro, they were moderately to highly attenuated for replication in the respiratory tracts of hamsters, African green monkeys (AGMs), and chimpanzees. This unexpected finding indicated that chimerization of the HN and F proteins of PIV2 and PIV3 itself specified an attenuation phenotype in vivo. Despite this attenuation, these viruses were highly immunogenic and protective against challenge with wild-type PIV2 in hamsters and AGMs, and they represent promising candidates for clinical evaluation as a vaccine against PIV2. These chimeric viruses were further attenuated by the addition of 12 mutations of PIV3cp45 which lie outside of the HN and F genes. The attenuating effects of these mutations were additive with that of the chimerization, and thus inclusion of all or some of the cp45 mutations provides a means to further attenuate the PIV3-PIV2 chimeric vaccine candidates if necessary.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Cell Line
- Chlorocebus aethiops
- Cricetinae
- HN Protein/genetics
- HN Protein/immunology
- HN Protein/metabolism
- Mesocricetus
- Molecular Sequence Data
- Mutagenesis, Site-Directed
- Pan troglodytes
- Parainfluenza Virus 2, Human/genetics
- Parainfluenza Virus 2, Human/metabolism
- Parainfluenza Virus 3, Human/genetics
- Parainfluenza Virus 3, Human/metabolism
- Protein Structure, Tertiary
- Recombination, Genetic
- Respiratory System/drug effects
- Respiratory System/virology
- Vaccination
- Vaccines, Attenuated/genetics
- Vaccines, Attenuated/immunology
- Vaccines, Attenuated/metabolism
- Vaccines, Attenuated/pharmacology
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/metabolism
- Vaccines, Synthetic/pharmacology
- Vero Cells
- Viral Fusion Proteins/genetics
- Viral Fusion Proteins/immunology
- Viral Fusion Proteins/metabolism
- Viral Vaccines/genetics
- Viral Vaccines/immunology
- Viral Vaccines/metabolism
- Viral Vaccines/pharmacology
- Virus Replication
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Affiliation(s)
- T Tao
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
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Ni H, Ryman KD, Wang H, Saeed MF, Hull R, Wood D, Minor PD, Watowich SJ, Barrett AD. Interaction of yellow fever virus French neurotropic vaccine strain with monkey brain: characterization of monkey brain membrane receptor escape variants. J Virol 2000; 74:2903-6. [PMID: 10684309 PMCID: PMC111783 DOI: 10.1128/jvi.74.6.2903-2906.2000] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binding of yellow fever virus wild-type strains Asibi and French viscerotropic virus and vaccine strains 17D and FNV to monkey brain and monkey liver cell membrane receptor preparations (MRPs) was investigated. Only FNV bound to monkey brain MRPs, while French viscerotropic virus, Asibi, and FNV all bound to monkey liver MRPs. Four monkey brain and two mouse brain MRP escape (MRP(R)) variants of FNV were selected at pH 7.6 and 6.0. Three monkey brain MRP(R) variants selected at pH 7.6 each had only one amino acid substitution in the envelope (E) protein in domain II (E-237, E-260, or E274) and were significantly attenuated in mice following intracerebral inoculation. Two of the variants were tested in monkeys and retained parental neurotropism following intracerebral inoculation at the dose tested. We speculate that this region of domain II is involved in binding of FNV E protein to monkey brain and is, in part, responsible for the enhanced neurotropism of FNV for monkeys. A monkey brain MRP(R) variant selected at pH 6.0 and two mouse brain MRP(R) variants selected at pH 7.6 were less attenuated in mice, and each had an amino acid substitution in the transmembrane region of the E protein (E-457 or E-458).
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Affiliation(s)
- H Ni
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555-0609, USA
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Abstract
The potential for DNA vaccines encoding mutated versions of the same antigen to modulate immune responses in C3H/HeN mice was investigated. We created expression plasmids that encoded several versions of glycoprotein D (gD) from bovine herpesvirus 1, including authentic membrane-anchored glycoprotein (pSLRSV.AgD), a secreted glycoprotein (pSLRSV.SgD), and an intracellular protein (pSLRSV.CgD). Immunization of an inbred strain of mice with these plasmids resulted in highly efficacious and long-lasting humoral and cell-mediated immunity. We also demonstrated that the cell compartment in which plasmid-encoded gD was expressed caused a deviation in the serum immunoglobulin (Ig) isotype profile as well as the predominant cytokines secreted from the draining lymph node. Immunization of C3H/HeN mice with DNA vaccines encoding cell-associated forms of gD resulted in a predominance of serum IgG2a and gamma interferon-secreting cells within the spleens and draining lymph nodes. In contrast, mice immunized with a secreted form of this same antigen displayed immune responses characterized by greater levels of interleukin 4 in the draining lymph node and IgG1 as the predominant serum isotype. We also showed evidence of compartmentalization of distinct immune responses within different lymphoid organs.
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MESH Headings
- Animals
- Antibodies, Viral/blood
- Antibodies, Viral/immunology
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Antigens, Viral/metabolism
- COS Cells
- Cattle
- Cell Line
- Female
- Gene Expression
- Herpesvirus 1, Bovine/genetics
- Herpesvirus 1, Bovine/immunology
- Immunoglobulin G/blood
- Immunoglobulin G/immunology
- Immunoglobulin Isotypes/blood
- Immunoglobulin Isotypes/immunology
- Immunophenotyping
- Lymph Nodes
- Mice
- Mice, Inbred C3H
- Neutralization Tests
- Spleen/cytology
- Spleen/immunology
- Th1 Cells/immunology
- Transfection
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/metabolism
- Viral Proteins/genetics
- Viral Proteins/immunology
- Viral Proteins/metabolism
- Viral Vaccines/genetics
- Viral Vaccines/immunology
- Viral Vaccines/metabolism
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Affiliation(s)
- P J Lewis
- Veterinary Infectious Disease Organization, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E3, Canada
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