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Cheng X, Wu W, Teng F, Yan Y, Li G, Wang L, Wang X, Wang R, Zhou H, Jiang Y, Cui W, Tang L, Li Y, Qiao X. Isolation and Characterization of Bovine RVA from Northeast China, 2017-2020. Life (Basel) 2021; 11:life11121389. [PMID: 34947920 PMCID: PMC8703504 DOI: 10.3390/life11121389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/05/2021] [Accepted: 12/08/2021] [Indexed: 12/01/2022] Open
Abstract
Group A rotaviruses (RVAs) are major enteric pathogens causing infections in calves. To investigate the epidemiological characteristics and genetic diversity of bovine rotavirus (BRV), 233 fecal samples were collected from calves with diarrhea in northeast China. The samples were analyzed for sequences encoding the inner capsid protein VP6 (subgroup) and the outer capsid proteins VP7 and VP4 (G and P type, respectively) using RT-PCR. Ten of the 233 samples (4.3%) were identified as BRV positive and were used for virus isolation and sequence analysis, revealing that all strains analyzed were of the G6P[1] genotype. The isolates exhibited high VP6 sequence identity to the USA cow RVA NCDV strain (>99% amino acid identity) and were further shown to be closely related to Japanese cow RVA BRV101 and Israelian human RVA G6P[1] strains, with >99% amino acid identity to VP7 and VP4 proteins, respectively. Comparative analyses of genome-predicted amino acid sequences between the isolates and the NCDV strains indicated that the antigenicity and infectivity of the strains isolated had changed. In this study, BRV genotypes and the genetic diversity among vaccinated cattle herds were monitored to provide epidemiological data and references for early diagnosis, allowing for early detection of new, potentially pathogenic RVA strains.
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Affiliation(s)
- Xi Cheng
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Wei Wu
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Fei Teng
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Yue Yan
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Guiwei Li
- Branch of Animal Husbandry and Veterinary of Heilongjiang Academy of Agricultural Sciences, Qiqihar 161000, China;
| | - Li Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Xiaona Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Ruichong Wang
- Department for Radiological Protection, Heilongjiang Province Center for Disease Control and Prevention, Harbin 150030, China;
| | - Han Zhou
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Yanping Jiang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Wen Cui
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Lijie Tang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Yijing Li
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Xinyuan Qiao
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive, Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150038, China; (X.C.); (W.W.); (F.T.); (Y.Y.); (L.W.); (X.W.); (H.Z.); (Y.J.); (W.C.); (L.T.); (Y.L.)
- Correspondence:
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Zhang L, Zheng B, Gao X, Zhang L, Pan H, Qiao Y, Suo G, Zhu F. Development of Patient-Derived Human Monoclonal Antibodies Against Nucleocapsid Protein of Severe Acute Respiratory Syndrome Coronavirus 2 for Coronavirus Disease 2019 Diagnosis. Front Immunol 2020; 11:595970. [PMID: 33281824 PMCID: PMC7691652 DOI: 10.3389/fimmu.2020.595970] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/16/2020] [Indexed: 12/31/2022] Open
Abstract
The pandemic caused by emerging Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) presents a global public health threat. Illustrating human antibody responding to viral antigen could potentially provide valuable information for basic research and clinical diagnosis. The antibody can be used as a complement to the viral detection for the rapid diagnosis of infected patients. Compared with spike protein (SP), nucleocapsid protein (NP) is normally conserved and highly immunogenic in many coronavirus members. As a major antigen, NP is a potential target for the diagnosis of SARS-CoV-2 infection. Here, we constructed a combinatorial fragment of antigen-binding (Fab)antibody phage library based on peripheral blood-derived from five coronavirus disease 2019 (COVID-19) infected donors. From the library, 159 Fab antibodies were obtained and identified by panning with NP. Among them, 16 antibodies were evaluated for their binding properties and epitopes recognition. Among these 16 antibodies, two well-paired antibodies were finally screened out for SARS-CoV-2 diagnosis by double-antibody sandwich enzyme-linked immunosorbent assay (ELISA) method. Our works may provide a potential resource for the clinical diagnosis of SARS-CoV-2 infection.
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Affiliation(s)
- Li Zhang
- National Health Commission of the People’s Republic of China, Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Binyang Zheng
- National Health Commission of the People’s Republic of China, Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Xingsu Gao
- National Health Commission of the People’s Republic of China, Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Libo Zhang
- Department of Laboratory, Nanjing Red Cross Blood Center, Nanjing, China
| | - Hongxin Pan
- National Health Commission of the People’s Republic of China, Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Yong Qiao
- CAS Key Laboratory of Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China
| | - Guangli Suo
- CAS Key Laboratory of Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China
| | - Fengcai Zhu
- National Health Commission of the People’s Republic of China, Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
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Thipwong J, Saelim H, Panrat T, Phongdara A. Penaeus monodon GILT enzyme restricts WSSV infectivity by reducing disulfide bonds in WSSV proteins. DISEASES OF AQUATIC ORGANISMS 2019; 135:59-70. [PMID: 31244485 DOI: 10.3354/dao03377] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gamma-interferon-inducible lysosomal thiol reductase (GILT) is involved in the adaptive immune response via its effects on major histocompatibility complex (MHC)-restricted antigen presentation. In addition to antigen presentation, GILT exerts its antiviral activity by reducing disulfide bonds in proteins involved in viral infection and assembly, thereby inhibiting viral envelope-mediated infection and viral progeny production. In black tiger shrimp, Penaeus monodon GILT (PmGILT) was cloned and characterized, and found to be involved in the shrimp innate immune response and to exert neutralizing activity against white spot syndrome virus (WSSV) infection. However, the anti-WSSV mechanism of PmGILT in the shrimp innate immune response has not been defined. To explore the anti-WSSV activity of PmGILT, a yeast 2-hybrid (Y2H) assay was performed to identify WSSV proteins targeted by PmGILT. The assay revealed 4 potential PmGILT-interacting WSSV proteins: WSSV002, WSSV164, WSSV189, and WSSV471. Three of these 4 WSSV proteins (WSSV002, WSSV164 and WSSV189) were successfully produced and confirmed to interact with PmGILT in in vitro pull-down assays. WSSV189 and WSSV471 were previously identified as structural proteins, whereas WSSV164 is an immediate-early protein which has anti-melanization activity, and WSSV002 is an unknown. Because of the thiol reductase activity of PmGILT, WSSV164 and WSSV189, both of which are cysteine-containing WSSV proteins, were chosen for disulfide bond reduction assays. PmGILT reduced intrachain disulfide bonds in both WSSV proteins, suggesting that PmGILT exerts its anti-WSSV activity via its thiol reductase activity to disrupt the WSSV protein complex and restore the melanization activity of PmproPO1 and PmproPO2.
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Affiliation(s)
- Jaturon Thipwong
- Department of Molecular Biotechnology and Bioinformatics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
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Li Y, Xue M, Yu L, Luo G, Yang H, Jia L, Zeng Y, Li T, Ge S, Xia N. Expression and characterization of a novel truncated rotavirus VP4 for the development of a recombinant rotavirus vaccine. Vaccine 2018; 36:2086-2092. [DOI: 10.1016/j.vaccine.2018.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 02/27/2018] [Accepted: 03/05/2018] [Indexed: 12/28/2022]
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Tekewe A, Fan Y, Tan E, Middelberg APJ, Lua LHL. Integrated molecular and bioprocess engineering for bacterially produced immunogenic modular virus-like particle vaccine displaying 18 kDa rotavirus antigen. Biotechnol Bioeng 2016; 114:397-406. [PMID: 27497268 DOI: 10.1002/bit.26068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 07/04/2016] [Accepted: 08/02/2016] [Indexed: 01/04/2023]
Abstract
A high global burden of rotavirus disease and the unresolved challenges with the marketed rotavirus vaccines, particularly in the developing world, have ignited efforts to develop virus-like particle (VLP) vaccines for rotavirus. While rotavirus-like particles comprising multiple viral proteins can be difficult to process, modular VLPs presenting rotavirus antigenic modules are promising alternatives in reducing process complexity and cost. In this study, integrated molecular and bioprocess engineering approaches were used to simplify the production of modular murine polyomavirus capsomeres and VLPs presenting a rotavirus 18 kDa VP8* antigen. A single construct was generated for dual expression of non-tagged murine polyomavirus capsid protein VP1 and modular VP1 inserted with VP8*, for co-expression in Escherichia coli. Co-expressed proteins assembled into pentameric capsomeres in E. coli. A selective salting-out precipitation and a polishing size exclusion chromatography step allowed the recovery of stable modular capsomeres from cell lysates at high purity, and modular capsomeres were successfully translated into modular VLPs when assembled in vitro. Immunogenicity study in mice showed that modular capsomeres and VLPs induced high levels of VP8*-specific antibodies. Our results demonstrate that a multipronged synthetic biology approach combining molecular and bioprocess engineering enabled simple and low-cost production of highly immunogenic modular capsomeres and VLPs presenting conformational VP8* antigenic modules. This strategy potentially provides a cost-effective production route for modular capsomere and VLP vaccines against rotavirus, highly suitable to manufacturing economics for the developing world. Biotechnol. Bioeng. 2017;114: 397-406. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Alemu Tekewe
- Australian Institute for Bioengineering and Nanotechnoloy, The University of Queensland, St Lucia, Queensland, Australia
| | - Yuanyuan Fan
- Protein Expression Facility, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Emilyn Tan
- Protein Expression Facility, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Anton P J Middelberg
- Australian Institute for Bioengineering and Nanotechnoloy, The University of Queensland, St Lucia, Queensland, Australia
| | - Linda H L Lua
- Protein Expression Facility, The University of Queensland, St Lucia, Queensland, 4072, Australia
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Nasiri K, Nassiri M, Tahmoorespur M, Haghparast A, Zibaee S. Design and Construction of Chimeric VP8-S2 Antigen for Bovine Rotavirus and Bovine Coronavirus. Adv Pharm Bull 2016; 6:91-8. [PMID: 27123423 PMCID: PMC4845540 DOI: 10.15171/apb.2016.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 02/14/2016] [Accepted: 02/16/2016] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Bovine Rotavirus and Bovine Coronavirus are the most important causes of diarrhea in newborn calves and in some other species such as pigs and sheep. Rotavirus VP8 subunit is the major determinant of the viral infectivity and neutralization. Spike glycoprotein of coronavirus is responsible for induction of neutralizing antibody response. METHODS In the present study, several prediction programs were used to predict B and T-cells epitopes, secondary and tertiary structures, antigenicity ability and enzymatic degradation sites. Finally, a chimeric antigen was designed using computational techniques. The chimeric VP8-S2 antigen was constructed. It was cloned and sub-cloned into pGH and pET32a(+) expression vector. The recombinant pET32a(+)-VP8-S2 vector was transferred into E.oli BL21CodonPlus (DE3) as expression host. The recombinant VP8-S2 protein was purified by Ni-NTA chromatography column. RESULTS The results of colony PCR, enzyme digestion and sequencing showed that the VP8-S2 chimeric antigen has been successfully cloned and sub-cloned into pGH and pET32a(+).The results showed that E.coli was able to express VP8-S2 protein appropriately. This protein was expressed by induction of IPTG at concentration of 1mM and it was confirmed by Ni-NTA column, dot-blotting analysis and SDS-PAGE electrophoresis. CONCLUSION The results of this study showed that E.coli can be used as an appropriate host to produce the recombinant VP8-S2 protein. This recombinant protein may be suitable to investigate to produce immunoglobulin, recombinant vaccine and diagnostic kit in future studies after it passes biological activity tests in vivo in animal model and or other suitable procedure.
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Affiliation(s)
- Khadijeh Nasiri
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran
| | - Mohammadreza Nassiri
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. ; Institute of Biotechnology, Ferdowsi University of Mashhad, Iran
| | - Mojtaba Tahmoorespur
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran
| | - Alireza Haghparast
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Iran
| | - Saeed Zibaee
- Razi Vaccine and Serum Research Institute, Mashhad, Iran
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Xue M, Yu L, Che Y, Lin H, Zeng Y, Fang M, Li T, Ge S, Xia N. Characterization and protective efficacy in an animal model of a novel truncated rotavirus VP8 subunit parenteral vaccine candidate. Vaccine 2015; 33:2606-13. [PMID: 25882173 DOI: 10.1016/j.vaccine.2015.03.068] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 03/14/2015] [Accepted: 03/23/2015] [Indexed: 11/17/2022]
Abstract
The cell-attachment protein VP8* of rotavirus is a potential candidate parenteral vaccine. However, the yield of full-length VP8 protein (VP8*, residues 1-231) expressed in Escherichia coli was low, and a truncated VP8 protein (ΔVP8*, residues 65-231) cannot elicit efficient protective immunity in a mouse model. In this study, tow novel truncated VP8 proteins, VP8-1 (residues 26-231) and VP8-2 (residues 51-231), were expressed in E. coli and evaluated for immunogenicity and protective efficacy, compared with VP8* and ΔVP8*. As well as ΔVP8*, the protein VP8-1 and VP8-2 were successfully expressed in high yield and purified in homogeneous dimeric forms, while the protein VP8* was expressed with lower yield and prone to aggregation and degradation in solution. Although the immunogenicity of the protein VP8*, VP8-1, VP8-2 and ΔVP8* was comparable, immunization of VP8* and VP8-1 elicited significantly higher neutralizing antibody titers than that of VP8-2 and ΔVP8* in mice. Furthermore, when assessed using a mouse maternal antibody model, the efficacy of VP8-1 to protect against rotavirus-induced diarrhea in pups was comparable to that of VP8*, both were dramatically higher than that of VP8-2 and ΔVP8*. Taken together, the novel truncated protein VP8-1, with increased yield, improved homogeneity and high protective efficacy, is a viable candidate for further development of a parenterally administrated prophylactic vaccine against rotavirus infection.
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MESH Headings
- Animals
- Antibodies, Neutralizing/blood
- Antibodies, Viral/blood
- Diarrhea/prevention & control
- Disease Models, Animal
- Escherichia coli/genetics
- Female
- Immunity, Maternally-Acquired
- Injections, Subcutaneous
- Mice, Inbred BALB C
- RNA-Binding Proteins/genetics
- RNA-Binding Proteins/immunology
- Rotavirus/immunology
- Rotavirus Infections/prevention & control
- Rotavirus Vaccines/administration & dosage
- Rotavirus Vaccines/immunology
- Vaccines, Subunit/administration & dosage
- Vaccines, Subunit/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/immunology
- Viral Nonstructural Proteins/genetics
- Viral Nonstructural Proteins/immunology
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Affiliation(s)
- Miaoge Xue
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Linqi Yu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China; School of Public Health, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Yaojian Che
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Haijun Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Yuanjun Zeng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Mujin Fang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China; School of Public Health, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Tingdong Li
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China; School of Public Health, Xiamen University, Xiamen 361102, Fujian, PR China.
| | - Shengxiang Ge
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China; School of Public Health, Xiamen University, Xiamen 361102, Fujian, PR China.
| | - Ningshao Xia
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen 361102, Fujian, PR China; School of Public Health, Xiamen University, Xiamen 361102, Fujian, PR China
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Phongdara A, Nakkaew A, Nualkaew S. Isolation of the detoxification enzyme EgP450 from an oil palm EST library. PHARMACEUTICAL BIOLOGY 2012; 50:120-127. [PMID: 22196587 DOI: 10.3109/13880209.2011.631019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
CONTEXT Sequencing of cDNA clones from plant tissue to generate expressed sequence tags (ESTs) is an effective tool for gene discovery. Together with powerful bioinformatics tools, EST sequences allow the prediction of functions of putative bioactive compounds that can later be confirmed. OBJECTIVE To isolate a detoxification enzyme from an EST library from the oil palm (Elaeis guineensis Jacq. Arecaceae). METHODS In total, 750 clones from an oil palm cDNA library were randomly sequenced and analyzed. A clone homologous to cytochrome P450 monooxygenases (P450) was selected from the list of highly expressed genes. The full-length cDNA of P450 from E. guineensis (EgP450) was generated and transformed into a bacterial host to produce recombinant protein. A 3D model of EgP450 was generated and used in a molecular docking analysis to screen for target herbicide substrates. Finally, the detoxification activity of EgP450 was confirmed by an herbicide tolerance test with rice seedlings. RESULTS AND DISCUSSION The full-length EgP450 has an open reading frame (ORF) of 1515 bp that encodes a protein of 505 amino acids. Docking analysis showed that EgP450 bound to phenylurea-like herbicides such as isoproturon, chlortoluron and fluometuron. The herbicide tolerance test demonstrated that the presence of EgP450 protected the rice seedlings from the killing action of the phytotoxic agent isoproturon. CONCLUSIONS The gene EgP450 was detected in the roots and stems of oil palm tissues, and its recombinant product was shown to protect rice seedlings from exogenous herbicides of the phenylurea family.
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Affiliation(s)
- Amornrat Phongdara
- Center for Genomics and Bioinformatics Research, Department of Molecular Biotechnology and Bioinformatics, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, Thailand.
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Lentz EM, Mozgovoj MV, Bellido D, Dus Santos MJ, Wigdorovitz A, Bravo-Almonacid FF. VP8* antigen produced in tobacco transplastomic plants confers protection against bovine rotavirus infection in a suckling mouse model. J Biotechnol 2011; 156:100-7. [PMID: 21893114 DOI: 10.1016/j.jbiotec.2011.08.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/26/2011] [Accepted: 08/14/2011] [Indexed: 10/17/2022]
Abstract
Group A rotavirus is a major leading cause of diarrhea in mammalian species worldwide. In Argentina, bovine rotavirus (BRV) is the main cause of neonatal diarrhea in calves. VP4, one of the outermost capsid proteins, is involved in various virus functions. Rotavirus infectivity requires proteolytic cleavage of VP4, giving an N-terminal non-glycosilated sialic acid-recognizing domain (VP8*), and a C-terminal fragment (VP5*) that remains associated with the virion. VP8* subunit is the major determinant of the viral infectivity and one of the neutralizing antigens. In this work, the C486 BRV VP8* protein was produced in tobacco chloroplasts. Transplastomic plants were obtained and characterized by Southern blot, northern blot and western blot. VP8* was highly stable in the transplastomic leaves, and formed insoluble aggregates that were partially solubilized by sonication. The recombinant protein yield was 600 μg/g of fresh tissue (FT). Both the soluble and insoluble fractions of the VP8* plant extracts were able to induce a strong immune response in female mice as measured by ELISA and virus neutralization test. Most important, suckling mice born to immunized dams were protected against oral challenge with virulent rotavirus. Results presented here contribute to demonstrate the feasibility of using antigens expressed in transplastomic plants for the development of subunit vaccines.
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Affiliation(s)
- E M Lentz
- Laboratorio de Virología y Biotecnología Vegetal, INGEBI-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
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10
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Saelee N, Tonganunt-Srithaworn M, Wanna W, Phongdara A. Receptor for Activated C Kinase-1 protein from Penaeus monodon (Pm-RACK1) participates in the shrimp antioxidant response. Int J Biol Macromol 2011; 49:32-6. [PMID: 21439997 DOI: 10.1016/j.ijbiomac.2011.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 03/15/2011] [Accepted: 03/17/2011] [Indexed: 01/23/2023]
Abstract
Cellular oxidative stress responses are caused in many ways, but especially by disease and environmental stress. After the initial burst of reactive oxygen species (ROS), the effective elimination of ROS is crucial for the survival of organisms and is mediated by antioxidant defense mechanisms. In this paper, we investigate the possible antioxidant function of Penaeus monodon Receptor for Activated C Kinase-1 (Pm-RACK1). When Pm-RACK1 was over-expressed in Escherichia coli cells or Spodoptera frugiperda (Sf9) insect cells exposed to H(2)O(2), it significantly protected the cells from oxidative damage induced by H(2)O(2). When recombinant Pm-RACK1 protein was expressed as a histidine fusion protein in E. coli and purified with a Ni(2+)-column it possessed antioxidant functions that protected DNA from metal-catalyzed oxidation. Shrimp (Penaeus vannamei) held at an alkaline pH had a much higher hepatopancreatic expression of Pm-RACK1 than in those held at pH 7.4. The exposure of shrimp to alkaline pH is also known to increase ROS production. These results provide strong evidence that Pm-RACK1 can participate in the shrimp antioxidant response induced by the formation of ROS.
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Affiliation(s)
- Netnapa Saelee
- Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
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Royuela E. Molecular cloning, expression and first antigenic characterization of human astrovirus VP26 structural protein and a C-terminal deleted form. Comp Immunol Microbiol Infect Dis 2008; 33:1-14. [PMID: 18790534 DOI: 10.1016/j.cimid.2008.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2008] [Indexed: 11/18/2022]
Abstract
The open reading frame 2 (ORF2) of human astrovirus (HAstV) encodes the structural VP26 protein that seems to be the main antigenic viral protein. However, its functional role remains unclear. Bioinformatic predictions revealed that VP29 and VP26 proteins could be involved in virus-cell interaction. In this study, we describe for the first time the cloning and expression in Escherichia coli (E. coli) of a recombinant VP26 (rVP26) protein and a VP26 C-terminal truncated form (VP26 Delta C), followed by purification by NTA-Ni(2+) agarose affinity chromatography. Protein expression and purification were evaluated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot (WB). Then, the purified proteins were evaluated for antigenic properties in enzyme linked immunosorbent assay (ELISA) using a polyclonal antibody (PAb) and a neutralizing monoclonal antibody (nMAb) named PL2, both of them directed to HAstV. The results presented herein indicate that the C-terminal end of the VP26 protein is essential to maintain the neutralizing epitope recognized by nMAb PL2 and that the N-terminus of VP26 protein may contain antigenic lineal-epitopes recognized by PAb. Thus, these recombinant proteins can be ideal tools for further antigenic, biochemical, structural and functional VP26 protein characterization, in order to evaluate its potential role in immunodiagnosis and vaccine studies.
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Affiliation(s)
- Enrique Royuela
- Centro Nacional de Microbiología (CNM), Instituto de Salud Carlos III (ISCIII), 28220 Madrid, Spain.
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