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Xu J, Sekiguchi T, Boonyakida J, Kato T, Park EY. Display of multiple proteins on engineered canine parvovirus-like particles expressed in cultured silkworm cells and silkworm larvae. Front Bioeng Biotechnol 2023; 11:1096363. [PMID: 36873345 PMCID: PMC9977810 DOI: 10.3389/fbioe.2023.1096363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/06/2023] [Indexed: 02/18/2023] Open
Abstract
Recent progress has been made dramatically in decorating virus-like particles (VLPs) on the surface or inside with functional molecules, such as antigens or nucleic acids. However, it is still challenging to display multiple antigens on the surface of VLP to meet the requirement as a practical vaccine candidate. Herein this study, we focus on the expression and engineering of the capsid protein VP2 of canine parvovirus for VLP display in the silkworm-expression system. The chemistry of the SpyTag/SpyCatcher (SpT/SpC) and SnoopTag/SnoopCatcher (SnT/SnC) are efficient protein covalent ligation systems to modify VP2 genetically, where SpyTag/SnoopTag are inserted into the N-terminus or two distinct loop regions (Lx and L2) of VP2. The SpC-EGFP and SnC-mCherry are employed as model proteins to evaluate their binding and display on six SnT/SnC-modified VP2 variants. From a series of protein binding assays between indicated protein partners, we showed that the VP2 variant with SpT inserted at the L2 region significantly enhanced VLP display to 80% compared to 5.4% from N-terminal SpT-fused VP2-derived VLPs. In contrast, the VP2 variant with SpT at the Lx region failed to form VLPs. Moreover, the SpT (Lx)/SnT (L2) double-engineered chimeric VP2 variants showed covalent conjugation capacity to both SpC/SnC protein partners. The orthogonal ligations between those binding partners were confirmed by both mixing purified proteins and co-infecting cultured silkworm cells or larvae with desired recombinant viruses. Our results indicate that a convenient VLP display platform was successfully developed for multiple antigen displays on demand. Further verifications can be performed to assess its capacity for displaying desirable antigens and inducing a robust immune response to targeted pathogens.
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Affiliation(s)
- Jian Xu
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Tomofumi Sekiguchi
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Jirayu Boonyakida
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Tatsuya Kato
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan.,Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.,Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Enoch Y Park
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan.,Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.,Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan
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Wang Y, Wang Y, Chen Z, Liu G, Jiang S, Li C. A multiplex nanoparticle-assisted polymerase chain reaction assay for detecting three canine epidemic viruses using a dual priming oligonucleotide system. J Virol Methods 2021; 298:114290. [PMID: 34543695 DOI: 10.1016/j.jviromet.2021.114290] [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: 07/21/2019] [Revised: 08/08/2021] [Accepted: 09/12/2021] [Indexed: 10/20/2022]
Abstract
A rapid and accurate diagnosis of mixed viral infections is important for providing timely therapeutic interventions. The aim of this study was to develop a highly sensitive and specific method for the simultaneous detection of canine distemper virus (CDV), canine parvovirus (CPV) and canine coronavirus (CCV) in mixed infections by combining the high specificity of a dual priming oligonucleotide (DPO) primer system with the high sensitivity of a nanoparticle-assisted PCR (nanoPCR) assay. Under the optimised assay conditions, the multiplex DPO-nanoPCR assay developed using DPO primers was 100-fold more sensitive than the multiplex PCR assay using conventional primers. The detection limits of the multiplex DPO-nanoPCR assay for the recombinant plasmids containing the cloned CDV, CPV and CCV target sequences were 5.4 × 102, 6.5 × 102 and 1.6 × 102 copies in a 25 μL assay, respectively. No cross-reaction with other canine viruses was observed. This is the first reported use of a multiplex nanoPCR assay with the DPO primer system for the simultaneous detection of CDV, CPV and CCV in mixed infections. The high sensitivity and specificity of the assay indicated its potential for use in clinical diagnosis and field surveillance of animal epidemics.
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Affiliation(s)
- Yong Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yuanhong Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zongyan Chen
- Innovation Team of Small Animal Infectious Disease, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai, 200241, China
| | - Guangqing Liu
- Innovation Team of Small Animal Infectious Disease, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai, 200241, China
| | - Shudong Jiang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Chuanfeng Li
- Innovation Team of Small Animal Infectious Disease, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai, 200241, China.
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3
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Hou J, Li Y, Ma C, Shi C. Accelerated denaturation bubble-mediated strand exchange amplification for rapid and accurate detection of canine parvovirus. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:5514-5522. [PMID: 33164005 DOI: 10.1039/d0ay01751e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Canine parvovirus (CPV), a strong infectious canine pathogen, has been recognized as a threat to canine health worldwide since the 1970s. Although convenient detection methods have been developed, such as the colloidal gold test strip, most of these methods are based on antibody detection, which is relatively ineffective for detecting pathogens during the incubation period. For institutions and businesses with many dogs, e.g., dog training centers and kennels, more sensitive detection methods are required to prevent the swift spread of CPV. Thus, we developed accelerated denaturation bubble-mediated strand exchange amplification (ASEA) for CPV detection, and it is a rapid, convenient, and cost-effective method. ASEA was able to distinguish CPV genomic DNA in a mixture that included canine genomic DNA as well as nucleic acids sourced from nine other common pathogens, with detection of target DNA as low as 8.0 × 10-18 M within 16.6 min. Coupled with the thermal lysis method modified by us that only requires 3 min to perform, the entire detection procedure can be completed within approximately 20 min and only requires a simple heating block and an ordinary fluorescence PCR instrument. Moreover, ASEA exhibited greater sensitivity than colloidal gold test strips in actual specimen detection. This technique is rapid, easy to perform, and highly sensitive, and therefore, this approach has the potential to rapidly detect CPV in institutions with large populations of dogs.
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Affiliation(s)
- Jie Hou
- Qingdao Nucleic Acid Rapid Testing International Science and Technology Cooperation Base, College of Life Sciences, Department of Pathogenic Biology, School of Basic Medicine, Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, PR China.
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4
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Wu H, Jin H, Wang L, Huo N, Liu D, Ding H, Cao Y, Liu C, Xi X, Jiao C, Spibey N, Shi J, Liu Y, Tian K. Generation and immunogenicity of virus-like particles based on mink enteritis virus capsid protein VP2 expressed in Sf9 cells. Arch Virol 2020; 165:2065-2071. [PMID: 32613291 DOI: 10.1007/s00705-020-04703-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/14/2020] [Indexed: 11/25/2022]
Abstract
Mink enteritis virus (MEV) is a parvovirus that causes acute enteritis in mink. The capsid protein VP2 of MEV is a major immunogenicity that is important for disease prevention. In this study, this protein was expressed in Spodoptera frugiperda 9 cells using a recombinant baculovirus system and was observed to self-assemble into virus-like particles (VLPs) with a high hemagglutination (HA) titer (1:216). A single-dose injection of VLPs (HA titer, 1:256) resulted in complete protection of mink against virulent MEV challenge for at least 180 days. These data suggest that these MEV VLPs could be used as a vaccine for the prevention of viral enteritis in mink.
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Affiliation(s)
- Hongchao Wu
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Hongli Jin
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, Jilin, China
| | - Lingxiao Wang
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Ningning Huo
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Di Liu
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, Jilin, China
| | - Hangtian Ding
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Yujiao Cao
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Caihong Liu
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Xiangfeng Xi
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Cuicui Jiao
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, Jilin, China
| | - Norman Spibey
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China
| | - Jing Shi
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, Jilin, China
| | - Yuxiu Liu
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China.
| | - Kegong Tian
- National Research Center for Veterinary Medicine, No. 3 Cuiwei Road, High-Tech District, Luoyang, 471003, Henan, China.
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Chang D, Liu Y, Chen Y, Hu X, Burov A, Puzyr A, Bondar V, Yao L. Study of the immunogenicity of the VP2 protein of canine parvovirus produced using an improved Baculovirus expression system. BMC Vet Res 2020; 16:202. [PMID: 32552679 PMCID: PMC7301529 DOI: 10.1186/s12917-020-02422-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Canine parvovirus (CPV) is now recognized as a serious threat to the dog breeding industry worldwide. Currently used CPV vaccines all have their specific drawbacks, prompting a search for alternative safe and effective vaccination strategies such as subunit vaccine. VP2 protein is the major antigen targeted for developing CPV subunit vaccine, however, its production in baculovirus expression system remains challenging due to the insufficient yield. Therefore, our study aims to increase the VP2 protein production by using an improved baculovirus expression system and to evaluate the immunogenicity of the purified VP2 protein in mice. RESULTS The results showed that high-level expression of the full length VP2 protein was achieved using our modified baculovirus expression system. The recombinant virus carrying two copies of VP2 gene showed the highest expression level, with a productivity of 186 mg/L, which is about 1.4-1.6 fold that of the recombinant viruses carrying only one copy. The purified protein reacted with Mouse anti-His tag monoclonal antibody and Rabbit anti-VP2 polyclonal antibody. BALB/c mice were intramuscularly immunized with purified VP2 protein twice at 2 week intervals. After vaccination, VP2 protein could induce the mice produce high level of hemagglutination inhibition antibodies. CONCLUSIONS Full length CPV VP2 protein was expressed at high level and purified efficiently. Moreover, it stimulated mice to produce high level of antibodies with hemmaglutination inhibition properties. The VP2 protein expressed in this study could be used as a putative economic and efficient subunit vaccine against CPV infection.
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Affiliation(s)
- Dao Chang
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yangkun Liu
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yangyang Chen
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Xiaomin Hu
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Andrey Burov
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Alexey Puzyr
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Vladimir Bondar
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Lunguang Yao
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China.
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6
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Chen C, Guo X, Liang H, Ning B, Li J, Zhong S, Liu X, Li L. Determination of parvovirus antibodies in canine serum using magnetic bead-based chemiluminescence immunoassay. Biotechnol Appl Biochem 2019; 66:586-590. [PMID: 31039295 PMCID: PMC7161764 DOI: 10.1002/bab.1758] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 03/16/2019] [Indexed: 02/02/2023]
Abstract
Canine parvovirus type 2 (CPV-2), as a highly contagious and potentially fatal disease of dogs and many other carnivores, usually causes severe gastroenteritis and myocarditis. Therefore, it is very necessary and urgent to have an accurate method to determine the CPV-2 antibodies (CPV-2-Ab) in canine samples. Here, a magnetic bead-based chemiluminescence immunoassay was established and optimized to detect the concentration of CPV-2-Ab in serum. And a commercial assay was also used to evaluate the consistency with our method. After optimization of the detective system, the CPV-2-Ab was captured by CPV-antigen-magnetic bead (8.3 µg/mL); then combined with the conjugation of anti-canine IgG antibody-acridinium ester (0.36 µg/mL). Finally, collected the signal (read the luminosity) after 1 H reaction time. The linear correlation coefficient (R2 ) is 0.9924. The limit of detection (sensitivity) is 0.36 ng/mL (the linear dynamic range: 1.32-93.75 ng/mL), and the average recovery is 100.89% without cross-reactions with other canine viral antibodies. The results' correlation between commercial assays and this method is 0.9888. This immunoassay establishes that it has high sensitivity, accuracy, and specificity in clinical analysis, indicating that this method could be suitable for quantitative detection of CPV-2-Ab and evaluation of vaccination effect.
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Affiliation(s)
- Cuicui Chen
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Xiaoxiao Guo
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Huankun Liang
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Bo Ning
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Jiexing Li
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Shuhai Zhong
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Xipan Liu
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
| | - Laiqing Li
- Guangzhou Youdi Bio-technology Co., Ltd., Guangzhou, 510663, China
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Sun YL, Yen CH, Tu CF. Immunocapture loop-mediated isothermal amplification assays for the detection of canine parvovirus. J Virol Methods 2017; 249:94-101. [PMID: 28834737 DOI: 10.1016/j.jviromet.2017.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 08/15/2017] [Accepted: 08/15/2017] [Indexed: 11/17/2022]
Abstract
A loop-mediated isothermal amplification (LAMP) assay was used for rapid canine parvovirus (CPV) diagnosis. To reduce the time required and increase the sensitivity of the assay, an immunocapture (IC) technique was developed in this study to exclude the DNA extraction step in molecular diagnostic procedures for CPV. A polyclonal rabbit anti-CPV serum was produced against VP2-EpC that was cloned via DNA recombination. The polyclonal anti-VP2-EpC serum was used for virus capture to prepare microtubes. IC-LAMP was performed to amplify a specific CPV target gene sequence from the CPV viral particles that were captured on the microtubes, and the amplicons were analyzed using agarose electrophoresis or enzyme-linked immunosorbent assay (IC-LAMP-ELISA) and lateral-flow dipstick (IC-LAMP-LFD). The detection sensitivities of IC-LAMP, IC-LAMP-ELISA, and IC-LAMP-LFD were 10-1, 10-1, and 10-1 TCID50/mL, respectively. Using the IC-LAMP-ELISA and IC-LAMP-LFD assays, the complete CPV diagnostic process can be achieved within 1.5h. Both of the developed IC-LAMP-based assays are simple, direct visual and efficient techniques that are applicable to the detection of CPV.
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Affiliation(s)
- Yu-Ling Sun
- Aquatic Technology Laboratories, Agricultural Technology Research Institute, No. 1, Ln. 51, Dahu Rd., Xiangshan Dist, 300 Hsinchu, Taiwan.
| | - Chon-Ho Yen
- Animal Technology Laboratories, Agricultural Technology Research Institute, Hsinchu, Taiwan
| | - Ching-Fu Tu
- Animal Technology Laboratories, Agricultural Technology Research Institute, Hsinchu, Taiwan
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8
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Thomas J, Singh M, Goswami TK, Glora P, Chakravarti S, Chander V, Upmanyu V, Verma S, Sharma C, Mahendran K. Determination of immune status in dogs against CPV-2 by recombinant protein based latex agglutination test. Biologicals 2017; 49:51-56. [PMID: 28689674 DOI: 10.1016/j.biologicals.2017.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/24/2017] [Accepted: 06/27/2017] [Indexed: 11/19/2022] Open
Abstract
Canine parvoviral enteritis is a highly contagious viral illness caused by canine parvovirus-2 (CPV-2) which affects puppies of mainly 6-20 weeks of age. Vaccination is pivotal in preventing and controlling CPV-2 infection. Determination of antibody status is a critical determinant for successful vaccination. The hemagglutination inhibition (HI) test is 'gold standard' test for quantification of antibodies specific to CPV-2, although the execution of this test is not feasible under field conditions. The present study was undertaken to develop a point of care testing to determine immune status prior to CPV-2 vaccination or to detect seroconversion in immunized dogs by latex agglutination test (LAT) using recombinant antigen. Truncated portion of VP2 protein (tVP2) of CPV-2 was selected on the basis of antigenic indices, overexpressed the recombinant protein in E. coli system and was subsequently used in development of LAT. A total of 59 serum samples obtained from vaccinated (n = 54) and healthy unvaccinated (n = 5) dogs were tested. The positivity was observed in 85% (46/54) of these dogs with varying agglutination pattern. The overall sensitivity and specificity of latex agglutination test in comparison to HI test was recorded as 90% and 88% respectively with an agreement value of 90% (CI = 95%).
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Affiliation(s)
- Jobin Thomas
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Mithilesh Singh
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India.
| | - T K Goswami
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Philma Glora
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Soumendu Chakravarti
- Biological Product Division, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Vishal Chander
- CADRAD, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Vikramaditya Upmanyu
- Biological Standardization Division, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Suman Verma
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Chhavi Sharma
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - K Mahendran
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
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Jin H, Xia X, Liu B, Fu Y, Chen X, Wang H, Xia Z. High-yield production of canine parvovirus virus-like particles in a baculovirus expression system. Arch Virol 2015; 161:705-10. [PMID: 26666439 DOI: 10.1007/s00705-015-2719-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
Abstract
An optimized VP2 gene from the current prevalent CPV strain (new CPV-2a) in China was expressed in a baculovirus expression system. It was found that the VP2 proteins assembled into virus-like particles (VLPs) with antigenic properties similar to those of natural CPV and with an especially high hemagglutination (HA) titer (1:2(20)). Dogs intramuscularly or orally immunized with VLPs produced antibodies against CPV with >1:80 hemagglutination inhibition (HI) units for at least 3 months. The CPV VLPs could be considered for use as a vaccine against CPV or as a platform for research on chimeric VLP vaccines against other diseases.
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Affiliation(s)
- Hongli Jin
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China.
| | - Xiaohong Xia
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China
| | - Bing Liu
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China
| | - Yu Fu
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China
| | - Xianping Chen
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China
| | - Huihui Wang
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China
| | - Zhenqiang Xia
- Changchun SR Biological Technology Co., LTD, Changchun, 130012, China.
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10
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Thomas J, Singh M, Goswami TK, Verma S, Badasara SK. Polymerase chain reaction based epidemiological investigation of canine parvoviral disease in dogs at Bareilly region. Vet World 2014. [DOI: 10.14202/vetworld.2014.929-932] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Tong C, Wu Z, Yu L, Fan Z, Chen L, Hu R, Ma J, Song B, Zhu Z, Cui Y. Development of an indirect ELISA for detection of E. Coli antibodies in cow serum using a recombinant OmpT as antigen. J Immunoassay Immunochem 2014; 35:241-55. [PMID: 24654821 DOI: 10.1080/15321819.2013.848812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The aim of this article was to develop an indirect enzyme-linked immunosorbent assay (ELISA) for efficient detection of the infection of E. coli in cattle. OmpT, a highly conserved protease in all E. coli strains, was successfully expressed in E. coli XL-1-Blue strain with PET32a vector. Molecular weight of recombinant protein was identified by analyzing SDS-PAGE and the immunogenicity of OmpT was confirmed by Western Blotting. The recombinant OmpT was then employed as capture antigen in the ELISA. The antigen concentration and serum dilution were determined using a checkerboard titration. Results showed that the optimal concentration of coated antigen was 1 μg/ml at a serum dilution of 1:640 and the cut-off value of the assay was 0.335. In addition, the cross-reactivity assay showed that the OmpT was E. coli specific and the reproducibility experiments displayed good repeatability of the assay. Three hundred and forty cattle serum samples were tested by rOmpT-ELISA and sera coagulation tests. The ELISA has showed relative sensitivity of 100% and specificity of 96.47%. Results of these experiments indicated that the rOmpT-ELISA is a simple, rapid, and convenient method for detection the infection of E. coli with different serotype strains.
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Affiliation(s)
- Chunyu Tong
- a School of Life Science & Biotechnology , Heilongjiang Bayi Agricultural University , Heilongjiang Province , People's Republic of China
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12
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Sun YL, Yen CH, Tu CF. Visual detection of canine parvovirus based on loop-mediated isothermal amplification combined with enzyme-linked immunosorbent assay and with lateral flow dipstick. J Vet Med Sci 2013; 76:509-16. [PMID: 24334855 PMCID: PMC4064134 DOI: 10.1292/jvms.13-0448] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Loop-mediated isothermal
amplification (LAMP) combined with enzyme-linked immunosorbent assay (LAMP–ELISA) and with
lateral flow dipstick (LAMP–LFD) are rapid, sensitive and specific methods for the visual
detection of clinical pathogens. In this study, LAMP–ELISA and LAMP–LFD were developed for
the visual detection of canine parvovirus (CPV). For LAMP, a set of four primers
(biotin-labeled forward inner primers) was designed to specifically amplify a region of
the VP2 gene of CPV. The optimum time and temperature for LAMP were 60 min and 65°C,
respectively. The specific capture oligonucleotide probes, biotin-labeled CPV probe for
LAMP–ELISA and fluorescein isothiocyanate-labeled CPV probe for LAMP–LFD were also
designed for hybridization with LAMP amplicons on streptavidin-coated wells and LFD
strips, respectively. For the comparison of detection sensitivity, conventional PCR and
LAMP for CPV detection were also performed. The CPV detection limits by PCR, PCR–ELISA,
LAMP, LAMP–ELISA and LAMP–LFD were 102, 102, 10−1,
10−1 and 10−1 TCID50/ml, respectively.
In tests using artificially contaminated dog fecal samples, the samples with CPV
inoculation levels of ≥1 TCID50/ml gave positive results by
both LAMP–ELISA and LAMP–LFD. Our data indicated that both LAMP–ELISA and LAMP–LFD are
promising as rapid, sensitive and specific methods for an efficient diagnosis of CPV
infection.
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Affiliation(s)
- Yu-Ling Sun
- Animal Technology Laboratories, Agricultural Technology Research Institute, Hsinchu City, Taiwan, R.O.C
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