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Bisht T, Adhikari A, Patil S, Dhoundiyal S. Bioconjugation Techniques for Enhancing Stability and Targeting Efficiency of Protein and Peptide Therapeutics. Curr Protein Pept Sci 2024; 25:226-243. [PMID: 37921168 DOI: 10.2174/0113892037268777231013154850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/05/2023] [Accepted: 09/15/2023] [Indexed: 11/04/2023]
Abstract
Bioconjugation techniques have emerged as powerful tools for enhancing the stability and targeting efficiency of protein and peptide therapeutics. This review provides a comprehensive analysis of the various bioconjugation strategies employed in the field. The introduction highlights the significance of bioconjugation techniques in addressing stability and targeting challenges associated with protein and peptide-based drugs. Chemical and enzymatic bioconjugation methods are discussed, along with crosslinking strategies for covalent attachment and site-specific conjugation approaches. The role of bioconjugation in improving stability profiles is explored, showcasing case studies that demonstrate successful stability enhancement. Furthermore, bioconjugation techniques for ligand attachment and targeting are presented, accompanied by examples of targeted protein and peptide therapeutics. The review also covers bioconjugation approaches for prolonging circulation and controlled release, focusing on strategies to extend half-life, reduce clearance, and design-controlled release systems. Analytical characterization techniques for bioconjugates, including the evaluation of conjugation efficiency, stability, and assessment of biological activity and targeting efficiency, are thoroughly examined. In vivo considerations and clinical applications of bioconjugated protein and peptide therapeutics, including pharmacokinetic and pharmacodynamic considerations, as well as preclinical and clinical developments, are discussed. Finally, the review concludes with an overview of future perspectives, emphasizing the potential for novel conjugation methods and advanced targeting strategies to further enhance the stability and targeting efficiency of protein and peptide therapeutics.
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Affiliation(s)
- Tanuja Bisht
- Department of Pharmacy, Shree Dev Bhoomi Institute of Education, Science and Technology, Veer Madho Singh Bhandari Uttarakhand Technical University, Dehradun, Uttarakhand, India
| | - Anupriya Adhikari
- Department of Pharmacy, Shree Dev Bhoomi Institute of Education, Science and Technology, Veer Madho Singh Bhandari Uttarakhand Technical University, Dehradun, Uttarakhand, India
| | - Shivanand Patil
- Department of Pharmacy, Shree Dev Bhoomi Institute of Education, Science and Technology, Veer Madho Singh Bhandari Uttarakhand Technical University, Dehradun, Uttarakhand, India
| | - Shivang Dhoundiyal
- Department of Pharmacy, School of Medical and Allied Sciences, Galgotias University, Greater Noida, Uttar Pradesh, India
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2
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Lei Y, Yong Z, Junzhi W. Development and application of potency assays based on genetically modified cells for biological products. J Pharm Biomed Anal 2023; 230:115397. [PMID: 37079933 DOI: 10.1016/j.jpba.2023.115397] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/13/2023] [Indexed: 04/22/2023]
Abstract
Potency assays are key to the development, registration, and quality control of biological products. Although previously preferred for clinical relevance, in vivo bioassays have greatly diminished with the advent of dependent cell lines as well as due to ethical concerns. However, for some products, the development of in vitro cell-based assay is challenging, or existing method has limitations such as tedious procedure or low sensitivity. The generation of genetically modified (GM) cell line with improved response to the analyte provides a scientific and promising solution. Potency assays based on GM cell lines are currently used for the quality control of biological products including cytokines, hormones, therapeutic antibodies, vaccines and gene therapy products. In this review, we have discussed the general principles of designing and developing GM cells-based potency assays, including identification of cellular signaling pathways and detectable biological effects, generation of responsive cell lines and constitution of test systems, based on the current research progress. In addition, the applications of some novel technologies and the common concerns regarding GM cells have also been discussed. The research presented in this review provides insights for the development and application of novel GM cells-based potency assays for biological products.
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Affiliation(s)
- Yu Lei
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Zhou Yong
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Wang Junzhi
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China.
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3
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Rodríguez-Pulido M, Calvo-Pinilla E, Polo M, Saiz JC, Fernández-González R, Pericuesta E, Gutiérrez-Adán A, Sobrino F, Martín-Acebes MA, Sáiz M. Non-coding RNAs derived from the foot-and-mouth disease virus genome trigger broad antiviral activity against coronaviruses. Front Immunol 2023; 14:1166725. [PMID: 37063925 PMCID: PMC10090856 DOI: 10.3389/fimmu.2023.1166725] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/20/2023] [Indexed: 04/18/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of a potentially severe respiratory disease, the coronavirus disease 2019 (COVID-19), an ongoing pandemic with limited therapeutic options. Here, we assessed the anti-coronavirus activity of synthetic RNAs mimicking specific domains in the non-coding regions of the foot-and-mouth disease virus (FMDV) genome (ncRNAs). These molecules are known to exert broad-spectrum antiviral activity in cell culture, mice and pigs effectively triggering the host innate immune response. The ncRNAs showed potent antiviral activity against SARS-CoV-2 after transfection in human intestinal Caco-2 and lung epithelium Calu-3 2B4 cells. When the in vivo efficacy of the FMDV ncRNAs was assessed in K18-hACE2 mice, administration of naked ncRNA before intranasal SARS-CoV-2 infection significantly decreased the viral load and the levels of pro-inflammatory cytokines in the lungs compared with untreated infected mice. The ncRNAs were also highly efficacious when assayed against common human HCoV-229E and porcine transmissible gastroenteritis virus (TGEV) in hepatocyte-derived Huh-7 and swine testis ST cells, respectively. These results are a proof of concept of the pan-coronavirus antiviral activity of the FMDV ncRNAs including human and animal divergent coronaviruses and potentially enhance our ability to fight future emerging variants.
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Affiliation(s)
- Miguel Rodríguez-Pulido
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Eva Calvo-Pinilla
- Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Miryam Polo
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Juan-Carlos Saiz
- Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Raúl Fernández-González
- Animal Reproduction Department, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Eva Pericuesta
- Animal Reproduction Department, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Alfonso Gutiérrez-Adán
- Animal Reproduction Department, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Francisco Sobrino
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Miguel A. Martín-Acebes
- Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Consejo Superior de Investigaciones Científicas (INIA-CSIC), Madrid, Spain
| | - Margarita Sáiz
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM), Madrid, Spain
- *Correspondence: Margarita Sáiz,
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4
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Li Z, Xie Y, Xiao B, Guo J. The tumor suppressor function of hsa_circ_0006282 in gastric cancer through PTEN/AKT pathway. Int J Clin Oncol 2022; 27:1562-1569. [PMID: 35794253 DOI: 10.1007/s10147-022-02210-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/20/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Circular RNAs (circRNAs) play key roles in carcinogenesis. However, the roles of circRNAs in gastric cancer are largely unknown. The aim of this study is to study the possible roles of hsa_circ_0006282 in gastric cancer. METHODS The hsa_circ_0006282 levels in gastric cancer cell lines, 85 gastritis tissues, and 103 paired gastric cancer tissues and non-tumor tissues were first detected by quantitative real-time reverse transcription-polymerase chain reaction. RNA interference and hsa_circ_0006282 expression plasmid were further used to manipulate hsa_circ_0006282 expression in gastric cancer. Finally, biological effects of hsa_circ_0006282 were analyzed by real-time cell analysis, flow cytometry, Transwell, cell cloning assay and Western blot analysis. RESULTS Hsa_circ_0006282 was down expressed in gastric cancer cells, gastritis tissues, and gastric cancer tissues. The abilities of cell proliferation, cell migration and resistance to apoptosis were enhanced after hsa_circ_0006282 was downregulated, while overexpression of hsa_circ_0006282 got opposite results. Besides, Western blot showed that the levels of protein kinase B (AKT) and cyclin-dependent kinase 2 (CDK2) were significantly increased and decreased after knockdown and up-regulation of hsa_circ_0006282, respectively, while phosphatase and tensin homolog deleted on chromosome ten (PTEN) was significantly opposite regulated. Finally, hsa_circ_0006282 promoted the expression of PTEN by sponging hsa-miR-136-5p. CONCLUSION By regulating the PTEN/AKT signaling pathway through competitively binding with hsa-miR-136-5p, hsa_circ_0006282 suppresses the growth of gastric cancer.
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Affiliation(s)
- Zhe Li
- Department of Gastroenterology, The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China
| | - Yi Xie
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Bingxiu Xiao
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China
| | - Junming Guo
- Department of Gastroenterology, The Affiliated Hospital of Medical School, Ningbo University, Ningbo, 315020, China.
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, 315211, China.
- Institute of Digestive Diseases of Ningbo University, Ningbo, 315020, China.
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5
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Puckette M, Barrera J, Schwarz M, Rasmussen M. Method for quantification of porcine type I interferon activity using luminescence, by direct and indirect means. BMC Biotechnol 2022; 22:13. [PMID: 35351081 PMCID: PMC8966355 DOI: 10.1186/s12896-022-00743-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 03/23/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Type I interferons are widely used in research applications and as biotherapeutics. Current assays used to measure interferon concentrations, such as plaque reduction assays and ELISA, are expensive, technically challenging, and may take days to provide results. We sought to develop a robust and rapid assay to determine interferon concentrations produced from transiently transfected cell cultures. METHOD Indirect quantification of recombinant interferon was evaluated using a novel bi-cistronic construct encoding the Foot-and-mouth disease virus 2A translational interrupter sequence to yield equimolar expression of Gaussia princeps luciferase and porcine interferon α. Direct quantification was evaluated by expression of a novel fusion protein comprised of Gaussia princeps luciferase and porcine type I interferon. Plasmids encoding constructs are transiently transfected into cell cultures and supernatant harvested for testing of luminescence, ELISA determined concentration, and anti-viral activity against vesicular stomatitis virus. RESULTS Bi-cistronic constructs, utilized for indirect quantification, demonstrate both luciferase activity and anti-viral activity. Fusion proteins, utilized for direct quantification, retained secretion and luminescence however only the interferon α fusion protein had antiviral activity comparable to wildtype porcine interferon α. A strong linear correlation was observed between dilution and luminescence for all compounds over a dynamic range of concentrations. CONCLUSION The correlation of antiviral and luciferase activities demonstrated the utility of this approach, both direct and indirect, to rapidly determine recombinant interferon concentrations. Concentration can be determined over a more dynamic concentration range than available ELISA based assays using this methodology.
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Affiliation(s)
- Michael Puckette
- Plum Island Animal Disease Center, U. S. Department of Homeland Security Science and Technology Directorate, P.O. Box 848, Greenport, NY, 11944, USA.
| | - J Barrera
- Plum Island Animal Disease Center, Leidos, Inc., P.O. Box 848, Greenport, NY, 11944, USA
| | - M Schwarz
- Oak Ridge Institute for Science and Education, Plum Island Animal Disease Center Research Participation Program, P.O. Box 848, Greenport, NY, 11944, USA
| | - M Rasmussen
- Plum Island Animal Disease Center, U. S. Department of Homeland Security Science and Technology Directorate, P.O. Box 848, Greenport, NY, 11944, USA
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6
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Boodhoo N, Matsuyama-Kato A, Shojadoost B, Behboudi S, Sharif S. The severe acute respiratory syndrome coronavirus 2 non-structural proteins 1 and 15 proteins mediate antiviral immune evasion. CURRENT RESEARCH IN VIROLOGICAL SCIENCE 2022; 3:100021. [PMID: 35187506 PMCID: PMC8837493 DOI: 10.1016/j.crviro.2022.100021] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/03/2022] [Accepted: 02/10/2022] [Indexed: 12/11/2022]
Abstract
Infection with pathogenic viruses is often sensed by innate receptors such as Toll-Like Receptors (TLRs) which stimulate type I and III interferons (IFNs) responses, to generate an antiviral state within many cell types. To counteract these antiviral systems, many viruses, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), encode non-structural proteins (NSPs) that mediate immune evasion. Using an overexpression system in A549 cells, we demonstrated a significant increase (p ≤ 0.0001) in Vesicular Stomatitis Virus (VSV)-EGFP reporter virus replication in cell lines overexpressing either the SARS-CoV-2 NSP1 or NSP15 when compared to control A549 cells. The increase in VSV-EGFP virus output was associated with a decrease in TLR2, TLR4 and TLR9 protein expression and a lack of antiviral protein production. Truncation of both NSP1 and NSP15 led to an increase in cellular TLR2, TLR4 and TLR9 as well as a decrease in TLR2 expression respectively. This observation can be attributed to the presence of a functional domain in NSP1 and NSP15 between amino acid (aa) 120–180 and aa 230–346, respectively. Both TLR3 and TLR9 ligands but not TLR2 ligand were highly effective at overcoming NSP1 and NSP15 functional interference based on significant decrease (p ≤ 0.0001) in VSV-EGFP virus replication. NSP1 or NSP15 intracellular interactions are likely low affinity interactions that can be easily disrupted by stimulating cells with specific TLR3 and TLR9 ligands. This report provides insights into the role of SARS-CoV-2 NSP1 and NSP15 in limiting specific TLR pathway activation, as an evasive mechanism against host innate responses.
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Affiliation(s)
- Nitish Boodhoo
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Ayumi Matsuyama-Kato
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Bahram Shojadoost
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Shahriar Behboudi
- The Pirbright Institute, Pirbright, Woking, United Kingdom.,Faculty of Health and Medical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, United Kingdom
| | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
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7
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Zhang X, Xiao K, Qiu W, Wang J, Li P, Peng K. The Immune Regulatory Effect of Boron on Ostrich Chick Splenic Lymphocytes. Biol Trace Elem Res 2021; 199:2695-2706. [PMID: 32984939 DOI: 10.1007/s12011-020-02392-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 09/13/2020] [Indexed: 10/23/2022]
Abstract
Boron is a trace element which plays important roles in immune response. The relationship between boron and splenic lymphocyte proliferation, apoptosis, secretion of cytokines, and genes potentially related to immune response in ostrich chicks were investigated in the present study. Different concentrations of boron (0, 0.01, 0.1, 0.5, 1, 5, 10, 25, 50, and 100 mmol/L) were applied to splenic lymphocytes of African ostrich, respectively. The effect of boron on lymphocyte proliferation was checked by the CCK-8 method. Flow cytometry was used to detect the effect of boron on apoptosis. The secretion levels of IL-6 and IFN-α were determined by ELISA. Splenic lymphocyte gene expression profiles of ostrich chicks treated with boron (0, 0.1, 100 mmol/L) were studied using RNA-seq technology. The results showed that cell proliferation increased with 0.01-10 mmol/L boron, when it was 25-100 mmol/L, the cell proliferation gradually decreased as the boron concentration increased. Apoptosis ratio in ostrich splenic lymphocytes was closely related to boron concentrations. 0.01- and 0.1-mmol/L boron inhibited apoptosis in splenic lymphocytes, whereas 1, 10, 50, and 100-mmol/L boron promoted apoptosis. As the concentration of boron increased, the secretion of IL-6 gradually decreased; IFN-α was initially increased and then decreased with boron concentrations increased, reaching the maximum level with 1 mmol/L boron. In terms of the RNA-Seq data, there was no differentially expressed gene between the 0- and 0.1-mmol/L boron-treated samples; 21 differentially expressed genes were found between the 0- and 100-mmol/L boron-treated samples; 43 differentially expressed genes were found between the 0.1- and 100-mmol/L boron-treated samples. Functional analysis of the differentially expressed genes by Gene Ontology verified multiple functions associated with immune response. Pathway analysis showed that systemic lupus erythematosus, alcoholism, viral carcinogenesis, and necroptosis pathway were the major enriched pathways, and BIRC2-3, FTH1, and IL-1β genes showed differential expression in necroptosis pathway. These results demonstrated that low concentrations (0.01-0.1 mmol/L) of boron may promote the proliferation and the secretion of cytokines, inhibit cell apoptosis of ostrich splenic lymphocytes by enhancing the function of the cell membrane and the activity of intracellular catalytic enzymes, whereas high-concentration (25-100 mmol/L) boron had opposite effects on cells. The necroptosis pathway might play a pivotal role in regulating the immune response of boron-treated splenic lymphocytes in ostrich chicks.
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Affiliation(s)
- Xiaoting Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
- College of Animal Science, Yangtze University, Jingzhou, 434103, China
| | - Ke Xiao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Weiwei Qiu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiaxiang Wang
- College of Animal Science, Yangtze University, Jingzhou, 434103, China
| | - Peng Li
- College of Animal Science, Yangtze University, Jingzhou, 434103, China
| | - Kemei Peng
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China.
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8
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Carratalá JV, Cano-Garrido O, Sánchez J, Membrado C, Pérez E, Conchillo-Solé O, Daura X, Sánchez-Chardi A, Villaverde A, Arís A, Garcia-Fruitós E, Ferrer-Miralles N. Aggregation-prone peptides modulate activity of bovine interferon gamma released from naturally occurring protein nanoparticles. N Biotechnol 2020; 57:11-19. [PMID: 32028049 DOI: 10.1016/j.nbt.2020.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 01/24/2020] [Accepted: 02/02/2020] [Indexed: 12/28/2022]
Abstract
Efficient protocols for the production of recombinant proteins are indispensable for the development of the biopharmaceutical sector. Accumulation of recombinant proteins in naturally-occurring protein aggregates is detrimental to biopharmaceutical development. In recent years, the view of protein aggregates has changed with the recognition that they are a valuable source of functional recombinant proteins. In this study, bovine interferon-gamma (rBoIFN-γ) was engineered to enhance the formation of protein aggregates, also known as protein nanoparticles (NPs), by the addition of aggregation-prone peptides (APPs) in the generally recognized as safe (GRAS) bacterial Lactococcus lactis expression system. The L6K2, HALRU and CYOB peptides were selected to assess their intrinsic aggregation capability to nucleate protein aggregation. These APPs enhanced the tendency of the resulting protein to aggregate at the expense of total protein yield. However, fine physico-chemical characterization of the resulting intracellular protein NPs, the protein released from them and the protein purified from the soluble cell fraction indicated that the compactability of protein conformations was directly related to the biological activity of variants of IFN-γ, used here as a model protein with therapeutic potential. APPs enhanced the aggregation tendency of fused rBoIFN-γ while increasing compactability of protein species. Biological activity of rBoIFN-γ was favored in more compacted conformations. Naturally-occurring protein aggregates can be produced in GRAS microorganisms as protein depots of releasable active protein. The addition of APPs to enhance the aggregation tendency has a positive impact in overall compactability and functionality of resulting protein conformers.
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Affiliation(s)
- José Vicente Carratalá
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain
| | - Olivia Cano-Garrido
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Bioengineering, Biomaterials and Nanomedicine Networking Biomedical Research Centre (CIBER-BBN), Bellaterra, Barcelona, Spain
| | - Julieta Sánchez
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain
| | - Cristina Membrado
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain
| | - Eudald Pérez
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain
| | - Oscar Conchillo-Solé
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain
| | - Xavier Daura
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Catalan Institution for Research and Advanced Studies, Barcelona, Spain
| | - Alejandro Sánchez-Chardi
- Microscopy Service, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain and Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Antonio Villaverde
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Bioengineering, Biomaterials and Nanomedicine Networking Biomedical Research Centre (CIBER-BBN), Bellaterra, Barcelona, Spain
| | - Anna Arís
- Department of Ruminant Production, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Barcelona, Spain
| | - Elena Garcia-Fruitós
- Department of Ruminant Production, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Barcelona, Spain
| | - Neus Ferrer-Miralles
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Bioengineering, Biomaterials and Nanomedicine Networking Biomedical Research Centre (CIBER-BBN), Bellaterra, Barcelona, Spain.
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9
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Rius-Rocabert S, Presa JL, Esteban-Rubio S, Ayuso-Sacido A, Nistal-Villan E. A Digital Method to Quantify Type I Interferon. J Interferon Cytokine Res 2019; 39:711-719. [PMID: 31268382 DOI: 10.1089/jir.2019.0046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Interferon (IFN), the first ever-described cytokine, has a potent activity against viruses. Soon since its discovery, quantification of IFN has been an important issue. Most of the traditional methods to measure IFN biological activity rely on indirect methods that quantify dyes retained by IFN-protected cells against a lytic virus, or by techniques that indirectly quantify viral replication by measuring the expression level of viral-encoded reporter proteins such as the green fluorescent protein (GFP). In both cases, the IFN units are determined by the quantification of an effective dose 50, defined as the IFN dose that prevents 50% cell death of 50% reduction of the maximal amount of GFP intensity. In this study we propose the use of an alternative approach to measure IFN activity by calculating the minimal IFN dose 50 as the amount of IFN able to completely protect 50% of the cells from infection measured by the total absence of virus-dependent GFP signal in a cell culture plate. This sensitive approach could be used to easily quantify the Z value to determine IFN bioassay robustness. We believe that this approximation could be interesting to be considered by the IFN community.
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Affiliation(s)
- Sergio Rius-Rocabert
- Microbiology Section, Dpto. CC, Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, CEU Universities, Boadilla del Monte, Madrid, Spain.,CEMBIO (Centre for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, CEU Universities, Boadilla del Monte, Madrid, Spain.,Instituto de Medicina Molecular Aplicada (IMMA), Universidad CEU San Pablo, Pablo-CEU, CEU Universities, Boadilla del Monte, Madrid, Spain
| | | | - Susana Esteban-Rubio
- Facultad de Medicina, Universidad CEU San Pablo, CEU Universities, Boadilla del Monte, Madrid, Spain
| | - Angel Ayuso-Sacido
- Facultad de Medicina, Universidad CEU San Pablo, CEU Universities, Boadilla del Monte, Madrid, Spain.,Fundación de Investigación HM Hospitales, HM Hospitales, Madrid, Spain.,Instituto de Investigación Sanitaria HM Hospitales, Madrid, Spain
| | - Estanislao Nistal-Villan
- Microbiology Section, Dpto. CC, Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU San Pablo, CEU Universities, Boadilla del Monte, Madrid, Spain.,Instituto de Medicina Molecular Aplicada (IMMA), Universidad CEU San Pablo, Pablo-CEU, CEU Universities, Boadilla del Monte, Madrid, Spain
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10
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Validation of a cell-based colorimetric reporter gene assay for the evaluation of Type I Interferons. ACTA ACUST UNITED AC 2019; 22:e00331. [PMID: 31061815 PMCID: PMC6487280 DOI: 10.1016/j.btre.2019.e00331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 11/20/2022]
Abstract
The biotherapeutic type I interferons (IFN-I) are indicated to treat several diseases. These products are regulated to guarantee safety and efficacy through critical quality attributes. For this purpose, the development of robust assays is required, followed by its validation to demonstrate their suitability for its intended purpose. Despite there are some commercial kits to evaluate IFN-I signaling, these are focused on measuring in vitro biological response instead of their validation, which is a pharmaceutical industry requirement. The aim of this work was to validate the HEK-Blue IFN-α/β system evaluating the biological activity of IFN-α/β under good laboratory practices, according to international standards. Our results demonstrated that HEK-Blue IFN-α/β system comply with accuracy (r2>0.95) precision (CV < 20%) and specificity for both IFN-α/β; confirming that this assay is robust for this biotherapeutics' evaluation. Thereby, this bioassay could be implemented as a complementary method to the classical anti-proliferative and anti-viral assays under quality control environments.
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Llibre A, Duffy D. Immune response biomarkers in human and veterinary research. Comp Immunol Microbiol Infect Dis 2018; 59:57-62. [PMID: 30290889 PMCID: PMC7172169 DOI: 10.1016/j.cimid.2018.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 05/22/2018] [Accepted: 09/17/2018] [Indexed: 11/30/2022]
Abstract
Biomarkers are increasingly utilised in biological research and clinical practice for diagnosis of disease, monitoring of therapeutic prognosis, or as end points in clinical studies. Cytokines are small molecules that orchestrate immune responses and as such have great potential as biomarkers for both human and veterinary fields. Given the ease of sampling in the blood, and their high prevalence in clinical applications we will focus on protein detection as an area for biomarker discovery. This is facilitated by new technological developments such as digital ELISA that have led to significant increases in sensitivity. Two highly relevant examples include type I interferons, namely IFNα, that is now directly quantifiable by digital ELISA from biological samples. The application of this approach to the study of the unique bat interferon response may reveal novel findings with applications in both human and veterinary research. As a second example we will describe the use of CXCL10 as a disease biomarker in Tuberculosis, highlighting findings from human and mouse studies that should be considered in veterinary research. In summary, we describe how cytokines may be applied as novel biomarkers and illustrate two key examples where human and veterinary research may complement each other in line with the One Health objectives.
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Affiliation(s)
- Alba Llibre
- Immunobiology of Dendritic Cells, Institut Pasteur, Paris, France; INSERM U1223, Paris, France
| | - Darragh Duffy
- Immunobiology of Dendritic Cells, Institut Pasteur, Paris, France; INSERM U1223, Paris, France.
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Quintana ME, Barone L, Forlenza MB, Trotta MV, Turco C, Mansilla FC, Cardoso NP, Capozzo AV. A direct high-throughput in Cell-ELISA for measuring infectivity of cytopathic and non-cytopathic bovine viral diarrhoea virus strains applied to the assessment of antiviral activity. J Virol Methods 2018; 260:75-81. [PMID: 30031751 DOI: 10.1016/j.jviromet.2018.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/17/2018] [Accepted: 07/19/2018] [Indexed: 01/28/2023]
Abstract
Low-cost high-throughput methods applicable to any virus strain are required for screening antiviral compounds against multiple field strains. Colorimetric cell-viability assays are used for this purpose as long as the viruses are cytopathic (CP) in cell culture. However, bovine viral diarrhoea virus (BVDV) strains circulating in the field are mostly non-cytopathic (NCP). An In Cell-ELISA aimed to measure viral infectivity by detecting a conserved protein produced during viral replication (non-structural protein 3, "NS3") was developed. The ELISA is performed without harvesting the cells, directly on the 96-wells culture plate. NS3 In Cell-ELISA was tested for its ability to assess BVDV-specific antiviral activity of recombinant bovine type I and III IFNs. Results correlated to those measured by qRT-PCR and virus titration. NS3 In Cell-ELISA was also efficient in estimating the IC50 of two compounds with different antiviral activity. Estimation of the 50% inhibition dose of each IFN using six BVDV strains of different biotype and genotype showed that CP strains were more susceptible to both IFNs than NCP, while type 2 NCP viruses were more sensitive to IFN-I. The In Cell-ELISA format using a detector antibody against a conserved non-structural protein can be potentially applied to accurately measure infectivity of any viral strain.
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Affiliation(s)
- María Eugenia Quintana
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas. Godoy Cruz 2290 C1425FQB, CABA, Argentina
| | - Lucas Barone
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina
| | - María Belén Forlenza
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina
| | - Myrian Vanesa Trotta
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina
| | - Cecilia Turco
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina
| | - Florencia Celeste Mansilla
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina
| | - Nancy Patricia Cardoso
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas. Godoy Cruz 2290 C1425FQB, CABA, Argentina
| | - Alejandra Victoria Capozzo
- Instituto Nacional de Tecnología Agropecuaria, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Instituto de Virología, Nicolás Repetto y Los Reseros s/n, Hurlingham B1686, Provincia de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas. Godoy Cruz 2290 C1425FQB, CABA, Argentina.
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Llibre A, Bondet V, Rodero MP, Hunt D, Crow YJ, Duffy D. Development and Validation of an Ultrasensitive Single Molecule Array Digital Enzyme-linked Immunosorbent Assay for Human Interferon-α. J Vis Exp 2018:57421. [PMID: 29985347 PMCID: PMC6101729 DOI: 10.3791/57421] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The main aim of this protocol is to describe the development and validation of an interferon (IFN)-α single molecule array digital Enzyme-Linked ImmunoSorbent Assay (ELISA) assay. This system enables the quantification of human IFN-α protein with unprecedented sensitivity, and with no cross-reactivity for other species of IFN. The first key step of the protocol is the choice of the antibody pair, followed by the conjugation of the capture antibody to paramagnetic beads, and biotinylation of the detection antibody. Following this step, different parameters such as assay configuration, detector antibody concentration, and buffer composition can be modified until optimum sensitivity is achieved. Finally, specificity and reproducibility of the method are assessed to ensure confidence in the results. Here, we developed an IFN-α single molecule array assay with a limit of detection of 0.69 fg/mL using high-affinity autoantibodies isolated from patients with biallelic mutations in the autoimmune regulator (AIRE) protein causing autoimmune polyendocrinopathy syndrome type 1/autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APS1/APECED). Importantly, these antibodies enabled detection of all 13 IFN-α subtypes. This new methodology allows the detection and quantification of IFN-α protein in human biological samples at attomolar concentrations for the first time. Such a tool will be highly useful in monitoring the levels of this cytokine in human health and disease states, most particularly infection, autoimmunity, and autoinflammation.
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Affiliation(s)
- Alba Llibre
- Immunobiology of Dendritic Cells, Institut Pasteur; INSERM U1223
| | - Vincent Bondet
- Immunobiology of Dendritic Cells, Institut Pasteur; INSERM U1223
| | - Mathieu P Rodero
- Laboratory of Neurogenetics and Neuroinflammation, INSERM UMR1163, Institut Imagine
| | - David Hunt
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh
| | - Yanick J Crow
- Laboratory of Neurogenetics and Neuroinflammation, INSERM UMR1163, Institut Imagine; Manchester Centre for Genomic Medicine, University of Manchester
| | - Darragh Duffy
- Immunobiology of Dendritic Cells, Institut Pasteur; INSERM U1223;
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Rees PA, Lowy RJ. Measuring type I interferon using reporter gene assays based on readily available cell lines. J Immunol Methods 2018; 461:63-72. [PMID: 29894744 DOI: 10.1016/j.jim.2018.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/15/2018] [Accepted: 06/06/2018] [Indexed: 02/05/2023]
Abstract
Cell lines stably transfected with genes responding to Type I interferons (IFN) are potentially a useful alternative to enzyme linked immuo-assays (ELISAs) or assays based on resistance of a test cell line to virus infection using cell death or infection endpoints. Increasingly available are a variety of commercial cell lines developed for reporter gene assays (RGAs) which are responsive to IFN exposure. These cells produce a soluble gene product which can be readily quantified using multiwell plate spectrophotometers or luminometers. We have investigated RAW-Blue ISG™ and B16-Blue IFNα/β™ cells (InvivoGen) which produce secreted embryonic alkaline phosphatase (SEAP) as a RGA to measure Interferon alpha (IFNα) and beta (IFNβ). These cells showed a log-linear response over 4 logs of IFN concentration between 10 and 100,000 Units/ml (U/ml). Concentration dependent responses could be observed as early as 6 h but greater sensitivity was obtained at 24 h. Neutralizing antibodies to IFNα and IFNβ reduced the response to baseline. As proof of principle supernatants from RAW 264.7 (murine macrophage; parental cell line) infected with 1 multiplicity of infection (moi) of influenza A virus (X31/H3N2) were used as test samples. Pre-treatment of the supernatant with anti-IFNα failed to reduce the cell response but it was reduced to background by anti-IFNβ. The high level of IFNβ but very low level of IFNα was confirmed by ELISA. Availability, ease of use and maintenance, and possible cost savings make application of this reporter gene cell approach a valuable alternative to other methods for measuring Type I interferon.
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Affiliation(s)
- Phyllis A Rees
- Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - R Joel Lowy
- Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, United States.
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15
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Nazli A, Dizzell S, Zahoor MA, Ferreira VH, Kafka J, Woods MW, Ouellet M, Ashkar AA, Tremblay MJ, Bowdish DM, Kaushic C. Interferon-β induced in female genital epithelium by HIV-1 glycoprotein 120 via Toll-like-receptor 2 pathway acts to protect the mucosal barrier. Cell Mol Immunol 2018; 16:178-194. [PMID: 29553138 PMCID: PMC6355787 DOI: 10.1038/cmi.2017.168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 12/22/2022] Open
Abstract
More than 40% of HIV infections occur via female reproductive tract (FRT) through heterosexual transmission. Epithelial cells that line the female genital mucosa are the first line of defense against HIV-1 and other sexually transmitted pathogens. These sentient cells recognize and respond to external stimuli by induction of a range of carefully balanced innate immune responses. Previously, we have shown that in response to HIV-1 gp120, the genital epithelial cells (GECs) from upper reproductive tract induce an inflammatory response that may facilitate HIV-1 translocation and infection. In this study, we report that the endometrial and endocervical GECs simultaneously induce biologically active interferon-β (IFNβ) antiviral responses following exposure to HIV-1 that act to protect the epithelial tight junction barrier. The innate antiviral response was directly induced by HIV-1 envelope glycoprotein gp120 and addition of gp120 neutralizing antibody inhibited IFNβ production. Interferon-β was induced by gp120 in upper GECs through Toll-like receptor 2 signaling and required presence of heparan sulfate on epithelial cell surface. The induction of IFNβ was dependent upon activation of transcription factor IRF3 (interferon regulatory factor 3). The IFNβ was biologically active, had a protective effect on epithelial tight junction barrier and was able to inhibit HIV-1 infection in TZM-bl indicator cells and HIV-1 replication in T cells. This is the first report that recognition of HIV-1 by upper GECs leads to induction of innate antiviral pathways. This could explain the overall low infectivity of HIV-1 in the FRT and could be exploited for HIV-1 prophylaxis.
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Affiliation(s)
- Aisha Nazli
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Sara Dizzell
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Muhammad Atif Zahoor
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Victor H Ferreira
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Jessica Kafka
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Matthew William Woods
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Michel Ouellet
- Department of Medical Biology, Laval University, Quebec City, QC G1V 0A6, Canada
| | - Ali A Ashkar
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Michel J Tremblay
- Department of Medical Biology, Laval University, Quebec City, QC G1V 0A6, Canada
| | - Dawn Me Bowdish
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Charu Kaushic
- McMaster Immunology Research Centre, Michael G. DeGroote Center for Learning and Discovery, McMaster University, Hamilton, ON L8S 4K1, Canada. .,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada.
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16
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Portugal R, Leitão A, Martins C. Modulation of type I interferon signaling by African swine fever virus (ASFV) of different virulence L60 and NHV in macrophage host cells. Vet Microbiol 2018. [PMID: 29519508 DOI: 10.1016/j.vetmic.2018.02.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
ASFV causes an important disease of domestic swine and wild boar. Currently no vaccine is available, highlighting the necessity to understand ASFV modulation of innate immune responses in natural host cells. With this aim, macrophage cultures enriched in SWC9 and CD163 differentiation markers were infected in parallel with high virulent ASFV/L60 and low virulent ASFV/NHV, the latter lacking MGF 360 and 505/530 genes associated with type I interferon (IFN I) control. IFN I production and signaling were studied after completion of the viral cycles. None of the viruses increased IFN I production in host cells, and accordingly, didn't cause activation of the central mediator of the pathway IRF3. However, upon stimulation by poly:IC treatment during infections, L60 and NHV similarly inhibited IFN I production. This didn't seem to depend on IRF3 modulation since its activation levels were not significantly decreased in L60 infection and were even increased in NHV's, in comparison to stimulated mock infections. The infections didn't evidently activate JAK-STAT pathway mediators STAT1 and STAT2, but did increase expression of interferon stimulated genes (ISGs), to higher levels in NHV than L60 infection. Interestingly, in presence of IFN-α, L60 but not NHV was able to decrease significantly the expression of some of the ISGs tested. Overall, both L60 and NHV were able to inhibit IFN I production in macrophages, through a mechanism not dependent on IRF3 modulation. The high virulent isolate showed however a more effective control of the downstream ISGs expression pathway.
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Affiliation(s)
- Raquel Portugal
- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.
| | - Alexandre Leitão
- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.
| | - Carlos Martins
- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.
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Chen W, Wen Z, Zhang J, Li C, Huang K, Bu Z. Establishing a safe, rapid, convenient and low-cost antiviral assay of interferon bioactivity based on recombinant VSV expressing GFP. J Virol Methods 2018; 252:1-7. [DOI: 10.1016/j.jviromet.2017.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/13/2017] [Accepted: 08/14/2017] [Indexed: 10/19/2022]
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18
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TOJI N, KOSHI K, FURUSAWA T, TAKAHASHI T, ISHIGURO-OONUMA T, KIZAKI K, HASHIZUME K. A cell-based interferon-tau assay with an interferon-stimulated gene 15 promoter . Biomed Res 2018; 39:13-20. [DOI: 10.2220/biomedres.39.13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Noriyuki TOJI
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
- The United Graduate School of Vaterinary Sciences, Gifu University
| | - Katsuo KOSHI
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
| | - Tadashi FURUSAWA
- Division of Animal Sciences, Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO)
| | - Toru TAKAHASHI
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
- The United Graduate School of Vaterinary Sciences, Gifu University
| | - Toshina ISHIGURO-OONUMA
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
- The United Graduate School of Vaterinary Sciences, Gifu University
| | - Keiichiro KIZAKI
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
- The United Graduate School of Vaterinary Sciences, Gifu University
| | - Kazuyoshi HASHIZUME
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
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Kosobokova EN, Piniugina MV, Kosorukov VS. Synthesis of biologically active human interferon α-2b in Nicotiana benthamiana. APPL BIOCHEM MICRO+ 2017. [DOI: 10.1134/s0003683816070048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Cook BWM, Ranadheera C, Nikiforuk AM, Cutts TA, Kobasa D, Court DA, Theriault SS. Limited Effects of Type I Interferons on Kyasanur Forest Disease Virus in Cell Culture. PLoS Negl Trop Dis 2016; 10:e0004871. [PMID: 27479197 PMCID: PMC4968803 DOI: 10.1371/journal.pntd.0004871] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/30/2016] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The tick-borne flavivirus, Kyasanur Forest disease virus (KFDV) causes seasonal infections and periodic outbreaks in south-west India. The current vaccine offers poor protection with reported issues of coverage and immunogenicity. Since there are no approved prophylactic therapeutics for KFDV, type I IFN-α/β subtypes were assessed for antiviral potency against KFDV in cell culture. METHODOLOGY/PRINCIPAL FINDINGS The continued passage of KFDV-infected cells with re-administered IFN-α2a treatment did not eliminate KFDV and had little effect on infectious particle production whereas the IFN-sensitive, green fluorescent protein-expressing vesicular stomatitis virus (VSV-GFP) infection was controlled. Further evaluation of the other IFN-α/β subtypes versus KFDV infection indicated that single treatments of either IFN-αWA and IFN-αΚ appeared to be more effective than IFN-α2a at reducing KFDV titres. Concentration-dependent analysis of these IFN-α/β subtypes revealed that regardless of subtype, low concentrations of IFN were able to limit cytopathic effects (CPE), while significantly higher concentrations were needed for inhibition of virion release. Furthermore, expression of the KFDV NS5 in cell culture before IFN addition enabled VSV-GFP to overcome the effects of IFN-α/β signalling, producing a robust infection. CONCLUSIONS/SIGNIFICANCE Treatment of cell culture with IFN does not appear to be suitable for KFDV eradication and the assay used for such studies should be carefully considered. Further, it appears that the NS5 protein is sufficient to permit KFDV to bypass the antiviral properties of IFN. We suggest that other prophylactic therapeutics should be evaluated in place of IFN for treatment of individuals with KFDV disease.
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Affiliation(s)
- Bradley W. M. Cook
- Applied Biosafety Research Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health and National Microbiology Laboratory at the J. C. Wilt Infectious Diseases Research Centre, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Microbiology, The University of Manitoba, Winnipeg, Manitoba, Canada
| | - Charlene Ranadheera
- High Containment Respiratory Viruses Group, Special Pathogens Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Aidan M. Nikiforuk
- Applied Biosafety Research Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health and National Microbiology Laboratory at the J. C. Wilt Infectious Diseases Research Centre, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Microbiology, The University of Manitoba, Winnipeg, Manitoba, Canada
| | - Todd A. Cutts
- Applied Biosafety Research Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health and National Microbiology Laboratory at the J. C. Wilt Infectious Diseases Research Centre, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Darwyn Kobasa
- High Containment Respiratory Viruses Group, Special Pathogens Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology, The University of Manitoba, Winnipeg, Manitoba, Canada
| | - Deborah A. Court
- Department of Microbiology, The University of Manitoba, Winnipeg, Manitoba, Canada
| | - Steven S. Theriault
- Applied Biosafety Research Program, National Microbiology Laboratory at the Canadian Science Centre for Human and Animal Health and National Microbiology Laboratory at the J. C. Wilt Infectious Diseases Research Centre, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Microbiology, The University of Manitoba, Winnipeg, Manitoba, Canada
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Zhang R, Liu R, Wang W, Xin L, Wang L, Li C, Song L. Identification and functional analysis of a novel IFN-like protein (CgIFNLP) in Crassostrea gigas. FISH & SHELLFISH IMMUNOLOGY 2015; 44:547-554. [PMID: 25812419 DOI: 10.1016/j.fsi.2015.03.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 03/07/2015] [Accepted: 03/13/2015] [Indexed: 06/04/2023]
Abstract
Interferons (IFNs) belong to class II helical cytokines family with pleiotropic biological activities, which have been demonstrated to play crucial roles in innate and adaptive immunity in vertebrates. In the present study, a novel IFN-like protein (designed CgIFNLP) was identified from oyster Crassostrea gigas, which contained an interferon domain from 14 to 97 amino acids showing low sequence similarities with vertebrates IFNs, but shared a similar three-dimensional structure with class II helical cytokines. The mRNA transcripts of CgIFNLP was detected in all the tested tissues including gonad, adductor muscle, hemocytes, mantle, gills, and hepatopancreas, with the highest expression level in gills (39-fold, P < 0.05). Moreover, the expression level of CgIFNLP mRNA in hemocytes increased significantly at 12 h (8.35-fold, P < 0.01) and 24 h (4.95-fold, P < 0.01) after poly (I: C) stimulation. After the treatments by recombinant CgIFNLP protein (rCgIFNLP) at different concentrations, the apoptosis and phagocytosis rates of oyster hemocytes increased obviously. The proliferation rate of L929 did not change obviously after incubation with rCgIFNLP for 72 h, but the proliferation rate of A549 abated significantly at 36 h and 48 h after incubation with rCgIFNLP. The results collectively suggested that the IFN-like molecule existed in oyster and it tended to present conserved functions rather than conserved amino acid sequence in comparison with vertebrate IFNs.
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Affiliation(s)
- Ran Zhang
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - Rui Liu
- Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Weilin Wang
- Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lusheng Xin
- Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lingling Wang
- Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Chenghua Li
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
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Ramanathan P, Zhu JJ, Bishop EA, Puckette MC, Hartwig E, Grubman MJ, Rodriguez LL. A colorimetric bioassay for high-throughput and cost-effectively assessing anti-foot-and-mouth disease virus activity. Vet Immunol Immunopathol 2015; 164:74-8. [DOI: 10.1016/j.vetimm.2015.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 12/12/2014] [Accepted: 01/14/2015] [Indexed: 11/17/2022]
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23
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Shao J, Cao C, Bao J, Gao M, Wang J. Characterization of the biological activities and physicochemical characteristics of recombinant bovine interferon-α14. Mol Immunol 2015; 64:163-9. [DOI: 10.1016/j.molimm.2014.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 11/10/2014] [Accepted: 11/11/2014] [Indexed: 11/26/2022]
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Shao J, Cao C, Bao J, Liu H, Peng T, Gao M, Wang J. Characterization of bovine interferon α1: expression in yeast Pichia pastoris, biological activities, and physicochemical characteristics. J Interferon Cytokine Res 2014; 35:168-75. [PMID: 25343404 DOI: 10.1089/jir.2013.0139] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A bovine interferon α (BoIFNα) gene that included signal sequence was amplified from bovine liver genomic DNA. The gene was named BoIFN-α1 according to the position at which the encoded gene of the bovine IFN was located in the bovine genome. The sequence included a 23-amino-acid signal peptide and a 166-amino-acid mature peptide. The structural characteristics and phylogenetic relationships of the BoIFN-α1 gene were analyzed. A recombinant mature BoIFN-α1 (rBoIFN-α1) was expressed in the yeast Pichia pastoris. Physicochemical characteristics and antiviral activity were determined in vitro. Recombinant BoIFN-α1 was found to be highly sensitive to trypsin and stable at pH 2.0 or 65°C. It also exhibited antiviral activity, which was neutralized by a rabbit anti-rBoIFNα polyclonal antibody. This study revealed that rBoIFN-α1 has the typical characteristics of IFNα and can be used for both research and industrial application.
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Affiliation(s)
- Jianwei Shao
- 1 College of Veterinary Medicine, Northeast Agricultural University , Harbin, China
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25
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Applications of cell-based bioassays measuring the induced expression of endogenous genes. Bioanalysis 2014; 6:1563-74. [PMID: 25046054 DOI: 10.4155/bio.14.98] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cell-based bioassays are used to determine the biological activity of complex biotherapeutic products, to assign potency and to assure the quality and consistency of the manufacturing process. Clinically, these assays are used to assess bioactivity in patient samples, particularly for the detection of antidrug neutralizing antibodies. Owing to their versatility, cellular assays that measure endogenous gene expression by quantitative reverse transcription PCR offer a rapid and automatable alternative to assays measuring functional, late-stage responses. Notably, detection of immediate early gene expression represents a direct response of the cell to receptor ligation by the biotherapeutic. We review current developments in the use of this approach and demonstrate its application to the detection of receptor-binding autoantibodies using, as a case study, the detection of autoantibodies to the thyroid-stimulating hormone receptor.
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Souto RB, Stamm FP, Schumacher JB, Cardoso CDA, de Freitas GW, Perobelli RF, Dalmora SL. Stability-indicating capillary zone electrophoresis method for the assessment of recombinant human interleukin-11 and its correlation with reversed-phase liquid chromatography and biossay. Talanta 2014; 123:179-85. [DOI: 10.1016/j.talanta.2014.01.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 01/29/2014] [Accepted: 01/30/2014] [Indexed: 11/27/2022]
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Peciak K, Tommasi R, Choi JW, Brocchini S, Laurine E. Expression of soluble and active interferon consensus in SUMO fusion expression system in E. coli. Protein Expr Purif 2014; 99:18-26. [PMID: 24680730 DOI: 10.1016/j.pep.2014.03.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 03/15/2014] [Accepted: 03/17/2014] [Indexed: 12/24/2022]
Abstract
Protein production can be improved if methods for soluble protein expression are developed. Interferon consensus (IFN-con) is used to treat hepatitis C. IFN-con has superior activity compared to other clinically used interferon α subtypes. However IFN-con is a challenging protein to produce in a soluble form using an Escherichia coli expression system. Here we describe the expression of soluble and active recombinant IFN-con in E. coli. The IFN-con gene sequence was optimised for expression in E. coli, which was then cloned into the Champion™ pET SUMO expression vector downstream of the SUMO fusion protein and under strong T7lac promoter. The SUMO-IFN-con fusion protein was efficiently expressed using the SHuffle™ E. coli strain and existed in soluble form as 86-88% of the total IFN-con. After removal of the SUMO fusion partner, approximately 50mg of recombinant IFN-con of at least 98% purity (by RP-HPLC) was obtained from a 1L fermentation culture. Using an A549/EMCV antiviral assay, the specific activity of the recombinant IFN-con was determined to be 960×10(6) IU/mg as calculated to NIBSC standard for IFN-con (3×10(5)pfu/mL virus titre). Comparison of the antiviral activity of the produced IFN-con to IFN α-2a showed that IFN-con displays 2.8 times greater activity, which is in good agreement with what has been reported in the literature for pure protein. IFN-con expression in a soluble form from E. coli allowed us to use a simple, two-step purification process to yield highly pure and active IFN-con which is more efficient than obtaining IFN-con from inclusion bodies.
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Affiliation(s)
- Karolina Peciak
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; PolyTherics Ltd., The London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Rita Tommasi
- PolyTherics Ltd., The London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Ji-won Choi
- PolyTherics Ltd., The London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Steve Brocchini
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; PolyTherics Ltd., The London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK
| | - Emmanuelle Laurine
- PolyTherics Ltd., The London Bioscience Innovation Centre, 2 Royal College Street, London NW1 0NH, UK.
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Beiting DP, Peixoto L, Akopyants NS, Beverley SM, Wherry EJ, Christian DA, Hunter CA, Brodsky IE, Roos DS. Differential induction of TLR3-dependent innate immune signaling by closely related parasite species. PLoS One 2014; 9:e88398. [PMID: 24505488 PMCID: PMC3914978 DOI: 10.1371/journal.pone.0088398] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 12/31/2013] [Indexed: 12/20/2022] Open
Abstract
The closely related protozoan parasites Toxoplasma gondii and Neospora caninum display similar life cycles, subcellular ultrastructure, invasion mechanisms, metabolic pathways, and genome organization, but differ in their host range and disease pathogenesis. Type II (γ) interferon has long been known to be the major mediator of innate and adaptive immunity to Toxoplasma infection, but genome-wide expression profiling of infected host cells indicates that Neospora is a potent activator of the type I (α/β) interferon pathways typically associated with antiviral responses. Infection of macrophages from mice with targeted deletions in various innate sensing genes demonstrates that host responses to Neospora are dependent on the toll-like receptor Tlr3 and the adapter protein Trif. Consistent with this observation, RNA from Neospora elicits TLR3-dependent type I interferon responses when targeted to the host endo-lysosomal system. Although live Toxoplasma fail to induce type I interferon, heat-killed parasites do trigger this response, albeit much weaker than Neospora, and co-infection studies reveal that T. gondii actively suppresses the production of type I interferon. These findings reveal that eukaryotic pathogens can be potent inducers of type I interferon and that related parasite species interact with this pathway in distinct ways.
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Affiliation(s)
- Daniel P. Beiting
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- * E-mail:
| | - Lucia Peixoto
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Natalia S. Akopyants
- Department of Molecular Microbiology, Washington University, St. Louis, Missouri, United States of America
| | - Stephen M. Beverley
- Department of Molecular Microbiology, Washington University, St. Louis, Missouri, United States of America
| | - E. John Wherry
- Department of Microbiology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - David A. Christian
- Department of Pathobiology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Christopher A. Hunter
- Department of Pathobiology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Igor E. Brodsky
- Department of Pathobiology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - David S. Roos
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
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Attenuating mutations in nsP1 reveal tissue-specific mechanisms for control of Ross River virus infection. J Virol 2014; 88:3719-32. [PMID: 24429363 DOI: 10.1128/jvi.02609-13] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
UNLABELLED Ross River virus (RRV) is one of a group of mosquito-transmitted alphaviruses that cause debilitating, and often chronic, musculoskeletal disease in humans. Previously, we reported that replacement of the nonstructural protein 1 (nsP1) gene of the mouse-virulent RRV strain T48 with that from the mouse-avirulent strain DC5692 generated a virus that was attenuated in a mouse model of disease. Here we find that the six nsP1 nonsynonymous nucleotide differences between strains T48 and DC5692 are determinants of RRV virulence, and we identify two nonsynonymous nucleotide changes as sufficient for the attenuated phenotype. RRV T48 carrying the six nonsynonymous DC5692 nucleotide differences (RRV-T48-nsP1(6M)) was attenuated in both wild-type and Rag1(-/-) mice. Despite the attenuated phenotype, RRV T48 and RRV-T48-nsP1(6M) loads in tissues of wild-type and Rag1(-/-) mice were indistinguishable from 1 to 3 days postinoculation. RRV-T48-nsP1(6M) loads in skeletal muscle tissue, but not in other tissues, decreased dramatically by 5 days postinoculation in both wild-type and Rag1(-/-) mice, suggesting that the RRV-T48-nsP1(6M) mutant is more sensitive to innate antiviral effectors than RRV T48 in a tissue-specific manner. In vitro, we found that the attenuating mutations in nsP1 conferred enhanced sensitivity to type I interferon. In agreement with these findings, RRV T48 and RRV-T48-nsP1(6M) loads were similar in mice deficient in the type I interferon receptor. Our findings suggest that the type I IFN response controls RRV infection in a tissue-specific manner and that specific amino acid changes in nsP1 are determinants of RRV virulence by regulating the sensitivity of RRV to interferon. IMPORTANCE Arthritogenic alphaviruses, including Ross River virus (RRV), infect humans and cause debilitating pain and inflammation of the musculoskeletal system. In this study, we identified coding changes in the RRV nsP1 gene that control the virulence of RRV and its sensitivity to the antiviral type I interferon response, a major component of antiviral defense in mammals. Furthermore, our studies revealed that the effects of these attenuating mutations are tissue specific. These findings suggest that these mutations in nsP1 influence the sensitivity of RRV to type I interferon only in specific host tissues. The new knowledge gained from these studies contributes to our understanding of host responses that control alphavirus infection and viral determinants that counteract these responses.
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de Oliveira ERA, Lima BMMP, de Moura WC, Nogueira ACMDA. Reduction of cell viability induced by IFN-alpha generates impaired data on antiviral assay using Hep-2C cells. J Immunol Methods 2013; 400-401:97-105. [PMID: 24211646 DOI: 10.1016/j.jim.2013.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/07/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
Abstract
Type I interferons (IFNs) exert an array of important biological functions on the innate immune response and has become a useful tool in the treatment of various diseases. An increasing demand in the usage of recombinant IFNs, mainly due to the treatment of chronic hepatitis C infection, augmented the need of quality control for this biopharmaceutical. A traditional bioassay for IFN potency assessment is the cytopathic effect reduction antiviral assay where a given cell line is preserved by IFN from a lytic virus activity using the cell viability as a frequent measure of end point. However, type I IFNs induce other biological effects such as cell-cycle arrest and apoptosis that can influence directly on viability of many cell lines. Here, we standardized a cytopathic effect reduction antiviral assay using Hep-2C cell/mengovirus combination and studied a possible impact of cell viability variations caused by IFN-alpha 2b on responses generated on the antiviral assay. Using the four-parameter logistic model, we observed less correlation and less linearity on antiviral assay when responses from IFN-alpha 2b 1000 IU/ml were considered in the analysis. Cell viability tests with MTT revealed a clear cell growth inhibition of Hep-2C cells under stimulation with IFN-alpha 2b. Flow cytometric cell-cycle analysis and apoptosis assessment showed an increase of S+G2 phase and higher levels of apoptotic cells after treatment with IFN-alpha 2b 1000 IU/ml under our standardized antiviral assay procedure. Considering our studied dose range, we also observed strong STAT1 activation on Hep-2C cells after stimulation with the higher doses of IFN-alpha 2b. Our findings showed that the reduction of cell viability driven by IFN-alpha can cause a negative impact on antiviral assays. We assume that the cell death induction and the cell growth inhibition effect of IFNs should also be considered while employing antiviral assay protocols in a quality control routine and emphasizes the importance of new approaches for IFN potency determination.
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Affiliation(s)
- Edson R A de Oliveira
- Laboratory of Biotechnology and Physiology of Viral Infections, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.
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31
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Li H, Li X, Liu Q, Shi Z, Shi D. Expression of Biologically Active Human Recombinant Interferon Alpha 2b in Human Breast Cancer Cell Line Bcap-37. Appl Biochem Biotechnol 2013; 171:1535-44. [DOI: 10.1007/s12010-013-0420-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Accepted: 07/30/2013] [Indexed: 10/26/2022]
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Brisbarre NM, Plumet S, de Micco P, Leparc-Goffart I, Emonet SF. Toscana virus inhibits the interferon beta response in cell cultures. Virology 2013; 442:189-94. [PMID: 23684418 DOI: 10.1016/j.virol.2013.04.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/02/2013] [Accepted: 04/18/2013] [Indexed: 12/24/2022]
Abstract
Toscana virus (TOSV) is an emerging pathogen in the Mediterranean basin where it causes summertime outbreaks of aseptic meningitis and meningoencephalitis. Many aspects of TOSV biology remain unknown including the possible implication of an amplifying mammalian host besides its vector. The three experiments described here were designed to assess the relationship between TOSV and type-I interferon (IFN) response. The main findings were as follows. First, TOSV growth in Vero cells is sensitive to an antiviral state induced by low-dose addition of exogenous IFN beta (IFN-β) (10IU/ml). Second, no IFN-β mRNA or IFN-β was detectable after infection of HeLa and 293T cells by TOSV. Finally, TOSV inhibits IFN-β production induced by Sendaï virus, a well known inducer of IFN-β production. In addition to showing that TOSV can inhibit the IFN-β response, these findings suggest that anti-IFN capability is maintained by regular contact with that of a mammalian host.
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Affiliation(s)
- Nadege M Brisbarre
- UMR CNRS 6578, French Blood Agency, Alpes-Mediterranee and Aix-Marseille University, Viral Emergence and Co-evolution Unit, 27 boulevard Jean Moulin, Marseille, France
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33
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Validation of an antiviral assay method for quantifying IFN-α5 activity in macaque and human serum. Bioanalysis 2013; 5:289-305. [PMID: 23394696 DOI: 10.4155/bio.12.313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND IFN-α5 has been demonstrated to induce stronger signaling and higher expression of antiviral genes than IFN-α2, which is the current treatment in chronic viral hepatitis. However, there is no specific and validated quantification method in order to conduct kinetic studies as part of the preclinical and clinical evaluation for regulatory purposes. RESULTS A novel integration of an antiviral assay against the cytopathic effect of the encephalomyocarditis virus in HeLa cells with a very sensitive method for assay processing - the Vialight(®) Plus assay - is presented for IFN-α5 activity quantification. The bioassay has been validated in macaque and human serum and it has been demonstrated to be selective, precise and accurate. CONCLUSION The validated bioassay meets suitable acceptance criteria for these types of biological assays.
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Bagó JR, Aguilar E, Alieva M, Soler-Botija C, Vila OF, Claros S, Andrades JA, Becerra J, Rubio N, Blanco J. In vivo bioluminescence imaging of cell differentiation in biomaterials: a platform for scaffold development. Tissue Eng Part A 2012; 19:593-603. [PMID: 23013334 DOI: 10.1089/ten.tea.2012.0073] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
In vivo testing is a mandatory last step in scaffold development. Agile longitudinal noninvasive real-time monitoring of stem cell behavior in biomaterials implanted in live animals should facilitate the development of scaffolds for tissue engineering. We report on a noninvasive bioluminescence imaging (BLI) procedure for simultaneous monitoring of changes in the expression of multiple genes to evaluate scaffold performance in vivo. Adipose tissue-derived stromal mensenchymal cells were dually labeled with Renilla red fluorescent protein and firefly green fluorescent protein chimeric reporters regulated by cytomegalovirus and tissue-specific promoters, respectively. Labeled cells were induced to differentiate in vitro and in vivo, by seeding in demineralized bone matrices (DBMs) and monitored by BLI. Imaging results were validated by RT-polymerase chain reaction and histological procedures. The proposed approach improves molecular imaging and measurement of changes in gene expression of cells implanted in live animals. This procedure, applicable to the simultaneous analysis of multiple genes from cells seeded in DBMs, should facilitate engineering of scaffolds for tissue repair.
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Affiliation(s)
- Juli R Bagó
- Cardiovascular Research Center CSIC-ICCC, CIBER-BBN, Barcelona, Spain
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35
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Zimmer B, Summermatter K, Zimmer G. Stability and inactivation of vesicular stomatitis virus, a prototype rhabdovirus. Vet Microbiol 2012; 162:78-84. [PMID: 22995872 DOI: 10.1016/j.vetmic.2012.08.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 08/20/2012] [Accepted: 08/24/2012] [Indexed: 11/16/2022]
Abstract
Viruses may remain infectious outside the host cell for considerable time and represent a source of accidental infection if not properly inactivated. In this study, the survival of vesicular stomatitis virus (VSV) in suspension and dried on surfaces was analyzed. In addition, the sensitivity of VSV to disinfectants and physicochemical changes was investigated. VSV showed a notable stability in suspension at 4°C with virus titers remaining high over several weeks. The presence of serum proteins had a stabilizing effect on virus infectivity, whereas elevated temperatures reduced survival times. VSV dried on polystyrene, glass or stainless steel surfaces remained infectious for at least 6 days at ambient temperature. VSV showed a remarkable resistance to extreme pH in particular in the alkaline range, but could be rapidly inactivated by heating at 55°C or higher. The virus was highly sensitive to inactivation by commonly used disinfectants such as aldehydes, alcohols, and detergents. The high stability of VSV on surfaces and in suspension may facilitate dissemination of the virus in livestock by contaminated feeding and water troughs, hands, and milking equipment. This knowledge on the sensitivity of VSV to disinfectants will help to set up appropriate hygiene measures.
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Affiliation(s)
- Bettina Zimmer
- Institut für Viruskrankheiten und Immunprophylaxe (IVI), Sensemattstrasse 293, CH-3147 Mittelhäusern, Switzerland
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36
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Improved analytical methods for the detection and quantification of neutralizing antibodies to biopharmaceuticals. Bioanalysis 2012; 4:2179-90. [DOI: 10.4155/bio.12.186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biopharmaceuticals are used extensively for the treatment of a number of chronic debilitating and fatal diseases such as cancer and inflammatory or autoimmune diseases. Although biopharmaceuticals are in general well tolerated, the development of anti-drug antibodies can impair their safety and efficacy. Assessment of immunogenicity is essential for a more effective and rational use of biopharmaceuticals, and is dependent upon the establishment of efficient standardized assays that allow direct comparison of immunogenicity data with clinical outcome. Although regulatory authorities recommend the use of cell-based assays that reflect the mechanism of action of the drug for the detection of neutralizing anti-drug antibodies, conventional cell-based assays are difficult to standardize and often give variable results. A number of strategies have been adopted to improve the performance of cell-based assays, including quantification of drug-induced proteins using either real-time RT-PCR or branched DNA to detect mRNA, or ELISAs to detect protein, bridging assays using immobilized cells and the use of reporter gene assays. The relative merits and limitations of each of these methods is reviewed herein.
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Doğan A, Özkara S, Sarı MM, Uzun L, Denizli A. Evaluation of human interferon adsorption performance of Cibacron Blue F3GA attached cryogels and interferon purification by using FPLC system. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 893-894:69-76. [DOI: 10.1016/j.jchromb.2012.02.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 02/18/2012] [Accepted: 02/23/2012] [Indexed: 11/27/2022]
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Interferon-β sensitivity of tumor cells correlates with poor response to VA7 virotherapy in mouse glioma models. Mol Ther 2012; 20:1529-39. [PMID: 22434140 DOI: 10.1038/mt.2012.53] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In our recent study, replicative alphaviral vector VA7 was found to be effective against orthotopic human U87-glioma xenografts in an athymic mouse model eradicating the tumors with single intravenous (i.v.) injection. Here, we tested the efficacy of VA7 in immunocompetent orthotopic GL261 and CT-2A glioma models of C57BL/6 mouse in vivo. The cell lines were susceptible to VA7 infection in vitro, but GL261 infection was highly restricted in confluent cell cultures, and mouse interferon-β (IFNβ) pretreatment prevented the replication of VA7 in both cell lines. When mice bearing orthotopic GL261 or CT-2A tumors were administered neurotropic VA7, either i.v. or intracranially (i.c.), the vector was unable to infect the tumor and no survival benefit was achieved. Pretreatments with immunosuppressive cyclophosphamide (CPA) and rapamycin markedly lowered serum-neutralizing antibodies (NAbs) but had no effect on tumor infection or survival. Intracranial GL261 tumors were refractory also in athymic C57BL/6 mice, which have serious defects in their adaptive immunity. Implanted VA7-infected GL261 cells formed tumors with only slightly delayed kinetics and without improving survival thus excluding the participation of physical barriers and indicating robust host IFN action. Mouse and human IFNβ do not seem be species cross-reactive, which might limit the translational relevance of xenograft models in oncolytic virotherapy.
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de Oliveira ERA, Lima BMMP, dos Santos BAF, de Moura WC, Nogueira ACMDA. Potency determination of recombinant IFN-alpha based on phosphorylated STAT1 using flow cytometry. J Immunol Methods 2012; 375:271-5. [PMID: 22115721 DOI: 10.1016/j.jim.2011.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 11/07/2011] [Accepted: 11/08/2011] [Indexed: 01/23/2023]
Abstract
The interferon (IFN) family of cytokines is recognized as a key component of the innate immune response and the first line of defense against viral infection. The usage of the IFN-alpha as a biopharmaceutical has been mainly applied in the treatment of chronic hepatitis C. In the literature it is possible to find a great variety of methods to determine the potency of these cytokines, and many efforts have been made in order to develop practical bioassays to study the biological activity of IFNs. In this technical note, we present a different approach to determine the potency of a recombinant IFN-alpha preparation based on the activation of the signal transducers and activators of transcription 1 (STAT1) using flow cytometry technique. Under the conditions of this study, this new approach proved to be useful and promising to assess the potency of these biopharmaceuticals and may also be used as an important tool in the quality control of such biological products.
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Affiliation(s)
- Edson R A de Oliveira
- Laboratory of Biotechnology and Physiology of Viral Infections, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.
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Antiviral activity of rChIFN-α against vesicular stomatitis virus and Newcastle disease virus: A novel recombinant chicken interferon-α showed high antiviral activity. Res Vet Sci 2011; 91:e73-9. [DOI: 10.1016/j.rvsc.2010.11.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 10/27/2010] [Accepted: 11/30/2010] [Indexed: 11/18/2022]
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41
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Cook BWM, Cutts TA, Court DA, Theriault S. The generation of a reverse genetics system for Kyasanur Forest Disease Virus and the ability to antagonize the induction of the antiviral state in vitro. Virus Res 2011; 163:431-8. [PMID: 22100401 DOI: 10.1016/j.virusres.2011.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 11/02/2011] [Accepted: 11/04/2011] [Indexed: 12/24/2022]
Abstract
Kyasanur Forest Disease Virus (KFDV) is a tick-borne, hemorrhagic fever-causing member of the Flaviviridae virus family. With infections annually ranging from 50 to 1000 people in south-west India and the lack of effective treatments, a better understanding of this virus is needed. The development of a reverse genetics system (RGS) for KFDV would provide the opportunity to address these issues. The KFDV genome sequence was elucidated and the RGS was created. Utilizing this system, live infectious KFDV particles were produced from mammalian cell culture, thereby validating the success of the RGS. Flaviviruses have the ability to suppress the type 1 interferon response and indications are that the non structural (NS) proteins serve this role. Using luciferase bioassays, the NS5 protein of KFDV was determined to be the primary antagonist of the IFN response when compared to the other NS proteins, specifically NS4B and NS4B-2k. Moreover, our results indicate that this is attributed to a region, beginning before and including the RNA-dependent RNA polymerase (RdRp). With evasion of the interferon response by KFDV established, the further implementation of the reverse genetics system will enable investigation into pathogenesis and disease progression of KFDV with respect to the innate immune response, at the IFN and the NS5 protein levels.
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Affiliation(s)
- Bradley W M Cook
- Canadian Science Center for Human and Animal Health, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3P6
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Berger Rentsch M, Zimmer G. A vesicular stomatitis virus replicon-based bioassay for the rapid and sensitive determination of multi-species type I interferon. PLoS One 2011; 6:e25858. [PMID: 21998709 PMCID: PMC3187809 DOI: 10.1371/journal.pone.0025858] [Citation(s) in RCA: 188] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 09/12/2011] [Indexed: 11/19/2022] Open
Abstract
Type I interferons (IFN) comprise a family of cytokines that signal through a common cellular receptor to induce a plethora of genes with antiviral and other activities. Recombinant IFNs are used for the treatment of hepatitis C virus infection, multiple sclerosis, and certain malignancies. The capability of type I IFN to suppress virus replication and resultant cytopathic effects is frequently used to measure their bioactivity. However, these assays are time-consuming and require appropriate biosafety containment. In this study, an improved IFN assay is presented which is based on a recombinant vesicular stomatitis virus (VSV) replicon encoding two reporter proteins, firefly luciferase and green fluorescent protein. The vector lacks the essential envelope glycoprotein (G) gene of VSV and is propagated on a G protein-expressing transgenic cell line. Several mammalian and avian cells turned out to be susceptible to infection with the complemented replicon particles. Infected cells readily expressed the reporter proteins at high levels five hours post infection. When human fibroblasts were treated with serial dilutions of human IFN-β prior to infection, reporter expression was accordingly suppressed. This method was more sensitive and faster than a classical IFN bioassay based on VSV cytopathic effects. In addition, the antiviral activity of human IFN-λ (interleukin-29), a type III IFN, was determined on Calu-3 cells. Both IFN-β and IFN-λ were acid-stable, but only IFN-β was resistant to alkaline treatment. The antiviral activities of canine, porcine, and avian type I IFN were analysed with cell lines derived from the corresponding species. This safe bioassay will be useful for the rapid and sensitive quantification of multi-species type I IFN and potentially other antiviral cytokines.
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Affiliation(s)
| | - Gert Zimmer
- Institut für Viruskrankheiten und Immunprophylaxe, Mittelhäusern, Switzerland
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43
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Vesicular stomatitis virus has extensive oncolytic activity against human sarcomas: rare resistance is overcome by blocking interferon pathways. J Virol 2011; 85:9346-58. [PMID: 21734048 DOI: 10.1128/jvi.00723-11] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Oncolytic viruses have been tested against many carcinomas of ectodermal and endodermal origin; however, sarcomas, arising from mesoderm, have received relatively little attention. Using 13 human sarcomas representing seven tumor types, we assessed the efficiency of infection, cytolysis, and replication of green fluorescent protein (GFP)-expressing vesicular stomatitis virus (VSV) and its oncolytically enhanced mutant VSV-rp30a. Both viruses efficiently infected and killed 12 of 13 sarcomas. VSV-rp30a showed a faster rate of infection and replication. In vitro and in vivo, VSV was selective for sarcomas compared with normal mesoderm. A single intravenous injection of VSV-rp30a selectively infected all subcutaneous human sarcomas tested in mice and arrested the growth of tumors that otherwise grew 11-fold. In contrast to other sarcomas, synovial sarcoma SW982 demonstrated remarkable resistance, even to high titers of virus (multiplicity of infection [MOI] of 100). We found no dysfunction in VSV binding or internalization. SW982 also resisted infection by human cytomegalovirus and Sindbis virus, suggesting a virus resistance mechanism based on an altered antiviral state. Quantitative reverse transcriptase (qRT)-PCR analysis revealed a heightened basal expression of interferon-stimulated genes (ISGs). Pretreatment, but not cotreatment, with interferon attenuators valproate, Jak1 inhibitor, or vaccinia virus B18R protein rendered SW982 highly susceptible, and this correlated with downregulation of ISG expression. Jak1 inhibitor pretreatment also enhanced susceptibility in moderately VSV-resistant liposarcoma and bladder carcinoma. Overall, we find that the potential efficacy of VSV as an oncolytic agent extends to nonhematologic mesodermal tumors and that unusually strong resistance to VSV oncolysis can be overcome with interferon attenuators.
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44
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Xu Q, Nomura T, Ikeda M, Ohta M, Kameyama KI, Konishi M, Wu D, Inumaru S, Murakami K. Stability of recombinant bovine interferon-γ antiviral activity in the absence of stabilizing additives. Microbiol Immunol 2011; 55:595-8. [PMID: 21545512 DOI: 10.1111/j.1348-0421.2011.00349.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The stability of recombinant bovine interferon-γ (rbIFN-γ) produced by a baculovirus expression system was investigated under different storage conditions: freezing-thawing and storage for 30 days at temperatures of -80, 4, 25, and 37°C. Antiviral activity was not significantly decreased by freeze-thawing at least five times. Furthermore, although not statistically different, antiviral activity gradually decreased as temperature increased. These findings suggest that rbIFN-γ possesses high thermal and freeze-thaw stability.
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Affiliation(s)
- Qingyuan Xu
- Harbin Veterinary Research Institute, 427 Maduan Street, Harbin 150001, China
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45
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Kugel D, Pulverer JE, Köster M, Hauser H, Staeheli P. Novel Nonviral Bioassays for Mouse Type I and Type III Interferon. J Interferon Cytokine Res 2011; 31:345-9. [DOI: 10.1089/jir.2010.0079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Daniela Kugel
- Department of Virology, University of Freiburg, Freiburg, Germany
| | | | - Mario Köster
- Helmholtz-Centre for Infection Research, Braunschweig, Germany
| | - Hansjörg Hauser
- Helmholtz-Centre for Infection Research, Braunschweig, Germany
| | - Peter Staeheli
- Department of Virology, University of Freiburg, Freiburg, Germany
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46
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Chen W, Cao W, Zhao H, Hu Q, Qu L, Hu S, Ge J, Wen Z, Wang X, Li H, Huang K, Bu Z. Establishment of a stable CHO cell line with high level expression of recombinant porcine IFN-β. Cytokine 2011; 54:324-9. [PMID: 21459017 PMCID: PMC7128424 DOI: 10.1016/j.cyto.2010.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2010] [Revised: 06/26/2010] [Accepted: 12/02/2010] [Indexed: 11/25/2022]
Abstract
A CHO cell clone (CHO-PoIFN-β) with stable porcine IFN-β expression under control of CMV promoter was selected under G418 pressure. In a 25 cm2 cell culture flask (5 ml culture medium), the cumulative protein yield of recombinant PoIFN-β reached 2.3 × 106 IU/ml. This cells clone maintained stable expression for at least 20 generations even in the absence of G418 selection pressure. The expressed recombinant PoIFN-β could induce the expression of porcine Mx protein in PK15 cells, and activate the chicken Mx promoter-controlled luciferase reporter gene expression, confirming that the recombinant PoIFN-β has the biological activity of natural porcine type-I interferon. In addition, the recombinant PoIFN-β fully protected PK15 cells against 1000 TCID50 of porcine transmissible gastroenteritis virus and pseudo-rabies virus infection, demonstrating its high potential in therapeutic applications. This is the first report of establishing a mammalian cell line with stable expression of porcine IFN-β.
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Affiliation(s)
- Weiye Chen
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), 427 Maduan Street, Harbin 150001, People's Republic of China
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47
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Bioactivity determination of native and variant forms of therapeutic interferons. J Biomed Biotechnol 2011; 2011:174615. [PMID: 21403871 PMCID: PMC3051158 DOI: 10.1155/2011/174615] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 01/14/2011] [Indexed: 12/25/2022] Open
Abstract
The traditional antiviral assays for the determination of interferon potency are reported to have considerable variability between and within assays. Although several reporter gene assays based on interferon-inducible promoter activities have been reported, data from comprehensive validation studies are lacking and few studies have been conducted to analyze the variant forms of interferons, which could have undesirable clinical implications. Here, a reporter gene assay employing a HEK293 cell line stably transfected with luciferase gene under the control of interferon-stimulated response element promoter was developed and validated. The assay was found to be more sensitive, with a larger detection range than the antiviral assay. Several cytokines tested did not interfere with the test, suggesting the assay possesses a certain degree of selectivity. Moreover, the robustness of the assay was demonstrated by minimal variations in the results generated by different analysts and cell passage number (up to 52 passages). Finally, the method was employed to analyze several interferon variants (interferon-α 2a) and we found that the aggregated form has completely lost its potency; while a modest loss of bioactivity in oxidized interferon was observed (approx. 23%), the deamidated form essentially retained its activity.
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48
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Meager A, Dolman C, Dilger P, Bird C, Giovannoni G, Schellekens H, Thorpe R, Wadhwa M. An assessment of biological potency and molecular characteristics of different innovator and noninnovator interferon-beta products. J Interferon Cytokine Res 2010; 31:383-92. [PMID: 21138379 DOI: 10.1089/jir.2010.0113] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Approved innovator products and their noninnovator "copy" versions are likely to vary in their quality, eg, physicochemical characteristics and biological activity, with important implications for clinical efficacy and safety. Therefore, it is important to study and thoroughly evaluate the noninnovator products in comparison with approved products at the preclinical and clinical stages. We have obtained 4 noninnovator interferon (IFN)-β-1a products currently marketed in Latin America and Iran and compared these with approved IFN-β-1a products (Avonex and Rebif) obtained from the same geographical regions with respect to biological potency, estimated by in vitro bioassays, and molecular characteristics, assessed by immunoblotting and high-performance liquid chromatography. In this article, we present our data showing that the noninnovator IFN-β-1a products can vary considerably in their biological potency. In addition, we showed that all IFN-β-1a products formulated with human serum albumin contained variable amounts of higher-molecular-weight aggregates of IFN-β-1a and adducts with human serum albumin, these being more prevalent in 2 noninnovator IFN-β-1a products where biological potency was reduced compared with approved IFN-β-1a products. Additionally, significant lot-to-lot variability was observed for one of the noninnovator products. Taken together, the results of this study highlight the need for not only thorough in vitro characterization, but also preclinical and clinical assessment to ensure patient safety and efficacy.
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Affiliation(s)
- Anthony Meager
- Cytokine and Growth Factor Section, Biotherapeutics Group, National Institute for Biological Standards and Control, Hertfordshire, United Kingdom
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49
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Increased mRNA expression of interferon-induced Mx1 and immunomodulation following oral administration of IFN-α2b-transformed B. longum to mice. Arch Microbiol 2010; 192:633-8. [DOI: 10.1007/s00203-010-0589-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 05/04/2010] [Accepted: 05/12/2010] [Indexed: 10/19/2022]
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50
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Cludts I, Meager A, Thorpe R, Wadhwa M. Detection of neutralizing interleukin-17 antibodies in autoimmune polyendocrinopathy syndrome-1 (APS-1) patients using a novel non-cell based electrochemiluminescence assay. Cytokine 2010; 50:129-37. [DOI: 10.1016/j.cyto.2010.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 01/02/2010] [Indexed: 01/08/2023]
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