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Purwanasari HN, Salasia SIO, Aziz F, Wasissa M, Lestari FB, Santosa CM. Development of antibodies against recombinant staphylococcal enterotoxin B from food poisoning cases. Vet World 2024; 17:131-135. [PMID: 38406354 PMCID: PMC10884591 DOI: 10.14202/vetworld.2024.131-135] [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: 10/19/2023] [Accepted: 12/11/2023] [Indexed: 02/27/2024] Open
Abstract
Background and Aim Staphylococcal enterotoxin B (SEB) is the most common serotype involved in food poisoning. The aim of this study was to develop immunoassay detection methods using a recombinant enterotoxin B antigen protein to produce recombinant polyclonal antibodies in vivo. Materials and Methods Staphylococcus aureus isolated from a food poisoning case (strain JH5800) was analyzed by polymerase chain reaction (PCR) and confirmed to contain a seb gene of 477 bp. A SEB segment was amplified, cloned, sequenced, and aligned. The PCR product corresponding to the predicted mature SEB peptide was inserted into Escherichia coli BL21 (DE-3) expression vector and expressed as a hexahistidine-SEB fusion protein. Antiserum against recombinant SEB protein was produced by immunization of Balb/c mice. Results In the indirect enzyme-linked immunosorbent assay (ELISA), the polyclonal antibodies produced had a titer of 1:3200. The seb gene of Staphylococcus aureus isolated from a poisoning case (JH5800) had a molecular size of about 477 bp and a band of recombinant SEB toxin was observed at approximately 30 kDa on SDS-PAGE gel. The polyclonal anti-SEB antibody titer, as revealed by indirect ELISA, was 1:3200 at 59 days. Conclusion SEB recombinant protein could be used to produce polyclonal antibodies. ELISA and Western blotting were used to analyze the specificity and sensitivity of the recombinant polyclonal antibodies. Polyclonal antibodies produced could be used to detect SEB on a large-scale.
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Affiliation(s)
- Hidayatun Nisa Purwanasari
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Siti Isrina Oktavia Salasia
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Fatkhanuddin Aziz
- Department of Bioresources Technology and Veterinary, Vocational College, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Madarina Wasissa
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Fajar Budi Lestari
- Department of Bioresources Technology and Veterinary, Vocational College, Universitas Gadjah Mada, Yogyakarta, Indonesia
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Jang JH, Kim S, Kim SG, Lee J, Lee DG, Jang J, Jeong YS, Song DH, Min JK, Park JG, Lee MS, Han BS, Son JS, Lee J, Lee NK. A Sensitive Immunodetection Assay Using Antibodies Specific to Staphylococcal Enterotoxin B Produced by Baculovirus Expression. BIOSENSORS 2022; 12:bios12100787. [PMID: 36290925 PMCID: PMC9599101 DOI: 10.3390/bios12100787] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 11/30/2022]
Abstract
Staphylococcal enterotoxin B (SEB) is a potent bacterial toxin that causes inflammatory stimulation and toxic shock, thus it is necessary to detect SEB in food and environmental samples. Here, we developed a sensitive immunodetection system using monoclonal antibodies (mAbs). Our study is the first to employ a baculovirus expression vector system (BEVS) to produce recombinant wild-type SEB. BEVS facilitated high-quantity and pure SEB production from suspension-cultured insect cells, and the SEB produced was characterized by mass spectrometry analysis. The SEB was stable at 4 °C for at least 2 years, maintaining its purity, and was further utilized for mouse immunization to generate mAbs. An optimal pair of mAbs non-competitive to SEB was selected for sandwich enzyme-linked immunosorbent assay-based immunodetection. The limit of detection of the immunodetection method was 0.38 ng/mL. Moreover, it displayed higher sensitivity in detecting SEB than commercially available immunodetection kits and retained detectability in various matrices and S. aureus culture supernatants. Thus, the results indicate that BEVS is useful for producing pure recombinant SEB with its natural immunogenic property in high yield, and that the developed immunodetection assay is reliable and sensitive for routine identification of SEB in various samples, including foods.
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Affiliation(s)
- Ju-Hong Jang
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Department of Biomolecular Science, Korea Research Institute of Bioscience and Biotechnology, School of Bioscience, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Sungsik Kim
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Seul-Gi Kim
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Department of Biomolecular Science, Korea Research Institute of Bioscience and Biotechnology, School of Bioscience, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Jaemin Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Dong-Gwang Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Jieun Jang
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Department of Biomolecular Science, Korea Research Institute of Bioscience and Biotechnology, School of Bioscience, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Young-Su Jeong
- Agency for Defense Development, 488 Bugyuseoung-daero, Daejeon 34060, Korea
| | - Dong-Hyun Song
- Agency for Defense Development, 488 Bugyuseoung-daero, Daejeon 34060, Korea
| | - Jeong-Ki Min
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Department of Biomolecular Science, Korea Research Institute of Bioscience and Biotechnology, School of Bioscience, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Jong-Gil Park
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Moo-Seung Lee
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Baek-Soo Han
- Biodefense Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Jee-Soo Son
- iNtRON Biotechnology, 137 Sagimakgol-ro, Jungwon-gu, Seongnam-si 13202, Korea
| | - Jangwook Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Department of Biomolecular Science, Korea Research Institute of Bioscience and Biotechnology, School of Bioscience, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
- Correspondence: (J.L.); (N.-K.L.); Tel.: +82-42-860-4123 (J.L.); +82-42-860-4117 (N.-K.L.)
| | - Nam-Kyung Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
- Correspondence: (J.L.); (N.-K.L.); Tel.: +82-42-860-4123 (J.L.); +82-42-860-4117 (N.-K.L.)
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Singh M, Agrawal RK, Singh BR, Mendiratta SK, Agarwal RK, Singh MK, Kumar D. Development and Evaluation of Simple Dot-Blot Assays for Rapid Detection of Staphylococcal Enterotoxin-A in Food. Indian J Microbiol 2017; 57:507-511. [PMID: 29151654 DOI: 10.1007/s12088-017-0671-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 09/02/2017] [Indexed: 01/06/2023] Open
Abstract
The present study was aimed to develop and evaluate dot-blot assays for rapid detection of staphylococcal enterotoxin-A (SEA) in food. Dot blots were developed in two formats, indirect and sandwich utilizing mouse monoclonal anti-SEA and rabbit polyclonal anti-SEA antibodies. In indirect dot-blot format, recombinant SEA was directly coated on NCM dot-blot strip and detection was carried out by anti-SEA antibodies. In sandwich dot-blot format, SEA was trapped between anti-SEA capture and detection antibodies. Both the dot-blot assays exhibited a sensitivity of ~48 ng ml-1 when tested in different food matrices. The developed assays were highly specific as no cross-reactivity was detected with other classical staphylococcal enterotoxins, toxigenic bacteria and foodborne pathogens. Sensitivity and specificity of developed indirect and sandwich dot-blot assays with respect to PCR was found to be 100 and 99%, respectively. The results shows that the developed dot-blot assays can be used as rapid preliminary screening tests for detection of SEA in food or determining the toxigenic potential of staphylococci, especially in resource-limited settings.
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Affiliation(s)
- Mamta Singh
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Ravi Kant Agrawal
- Food Microbiology Laboratory, Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Bhoj Raj Singh
- Division of Epidemiology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Sanjod Kumar Mendiratta
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Rajesh Kumar Agarwal
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Mithilesh Kumar Singh
- Immunology Section, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
| | - Deepak Kumar
- Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122 India
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Xu J, Chen LZ, Liu XY, Feng EK, Wang SJ, Cao Y. Preliminary Extraction and Identification of the 44.5 kDa Outer Membrane Proteins Isolated from Bovine Fusobacterium necrophorum (AB). Indian J Microbiol 2013; 53:395-9. [PMID: 24426142 DOI: 10.1007/s12088-013-0388-x] [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: 10/09/2012] [Accepted: 03/08/2013] [Indexed: 01/18/2023] Open
Abstract
Fusobacterium necrophorum (AB) in the pharynx, respiratory tract, female reproductive tract or urinary system is the causative agent of footrot and hepatic abscesses in animals and acute Lemierre's syndrome in humans. Current methods do not effectively protect animals and humans against F. necrophorum (AB). The outer membrane proteins (OMP) of F. necrophorum (AB) can be used as new material to protect against the diseases induced by F. necrophorum (AB). The aim of this study was to extract OMP and examine the immunogenic response of OMP. The preliminary extraction of OMP of F. necrophorum (AB) was identified by SDS-PAGE and stained by Coomassie Brilliant Blue R-250 (CB B R-250) and silver staining methods. The results showed that only a major band of 44.5 kDa was observed when staining the gel using CB B R-250. This band represented the target protein. In contrast, many small bands were observed by the silver staining method. The OMP also exhibited immune biological activities according to western blot analysis. The brightest band among the multi-banding observed was the OMP. Thus, the OMP was obtained and had immunogenic activity. The results provide a new direction to protect animals and humans against F. necrophorum (AB) in the clinical setting.
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Affiliation(s)
- Jing Xu
- College of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China ; State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
| | - Li-Zhi Chen
- State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
| | - Xiao-Ying Liu
- State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
| | - Er-Kai Feng
- State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
| | - Sun-Jie Wang
- College of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China ; State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
| | - Yue Cao
- State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Science, Changchun, China
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