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Kou J, Shen J, Wang Z, Yu W. Advances in hybridoma preparation using electrofusion technology. Biotechnol J 2023; 18:e2200428. [PMID: 37402172 DOI: 10.1002/biot.202200428] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 06/13/2023] [Accepted: 06/30/2023] [Indexed: 07/06/2023]
Abstract
As a rapidly developing cell engineering technique, cell electrofusion has been increasingly applied in the field of hybridoma preparation in recent years. However, it is difficult to completely replace the polyethylene glycol-mediated cell fusion using electrofusion due to the high operation requirements, high cost of electrofusion instruments, and lack of prior reference research work. The key elements limiting electrofusion in the field of hybridoma preparation also introduce practical complications, such as the use/choice of electrofusion instruments, setup/optimization of electrical parameters, and precise control of cells. This review summarizes the state of the art of cell electrofusion in hybridoma preparation based on recent published literature, mainly focusing on electrofusion instruments and their components, process control and characterization, and cell treatment. It also provides new information and insightful commentary critically important for further electrofusion development in the field of hybridoma preparation.
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Affiliation(s)
- Jiaqian Kou
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
- Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Jianzhong Shen
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
- Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Zhanhui Wang
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
- Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Wenbo Yu
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
- Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
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2
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Kuang J, Ju J, Lu Y, Chen Y, Liu C, Kong D, Shen W, Shi HW, Li L, Ye J, Tang S. Magnetic three-phase single-drop microextraction for highly sensitive detection of aflatoxin B 1 in agricultural product samples based on peroxidase-like spatial network structure. Food Chem 2023; 416:135856. [PMID: 36898338 DOI: 10.1016/j.foodchem.2023.135856] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 12/12/2022] [Accepted: 03/01/2023] [Indexed: 03/07/2023]
Abstract
In this work, a highly sensitive method for aflatoxin B1 (AFB1) detection was developed based on a peroxidase-like spatial network structure. The specific antibody and antigen of AFB1 were coated on a histidine-modified Fe3O4 nanozyme to form the capture/detection probes. Based on the competition/affinity effect, the spatial network structure was constructed by the probes, which could be rapidly (8 s) separated by a magnetic three-phase single-drop microextraction process. In this single-drop microreactor, the network structure was applied to catalyze a colorimetric 3,3',5,5'-tetramethylbenzidine oxidation reaction for AFB1 detection. The signal was amplified significantly due to the strong peroxidase-like ability of the spatial network structure and the enrichment effect of the microextraction. Thus, a low detection limit (0.034 pg/mL) was achieved. The matrix effect of real sample can be eliminated by the extraction approach, and the practicability of this method was proved by agricultural product samples analysis.
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Affiliation(s)
- Jingyu Kuang
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Jiahe Ju
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Yongli Lu
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Yitong Chen
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Chang Liu
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Dezhao Kong
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China.
| | - Wei Shen
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China.
| | - Hai-Wei Shi
- Jiangsu Institute for Food and Drug Control, Nanjing 210019, Jiangsu Province, PR China; School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China
| | - Li Li
- Academy of National Food and Strategic Reserves Administration, Beijing 100037, PR China
| | - Jin Ye
- Academy of National Food and Strategic Reserves Administration, Beijing 100037, PR China
| | - Sheng Tang
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, PR China.
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3
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Liu S, Jiang S, Yao Z, Liu M. Aflatoxin detection technologies: recent advances and future prospects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:79627-79653. [PMID: 37322403 DOI: 10.1007/s11356-023-28110-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 06/01/2023] [Indexed: 06/17/2023]
Abstract
Aflatoxins have posed serious threat to food safety and human health. Therefore, it is important to detect aflatoxins in samples rapidly and accurately. In this review, various technologies to detect aflatoxins in food are discussed, including conventional ones such as thin-layer chromatography (TLC), high performance liquid chromatography (HPLC), enzyme linked immunosorbent assay (ELISA), colloidal gold immunochromatographic assay (GICA), radioimmunoassay (RIA), fluorescence spectroscopy (FS), as well as emerging ones (e.g., biosensors, molecular imprinting technology, surface plasmon resonance). Critical challenges of these technologies include high cost, complex processing procedures and long processing time, low stability, low repeatability, low accuracy, poor portability, and so on. Critical discussion is provided on the trade-off relationship between detection speed and detection accuracy, as well as the application scenario and sustainability of different technologies. Especially, the prospect of combining different technologies is discussed. Future research is necessary to develop more convenient, more accurate, faster, and cost-effective technologies to detect aflatoxins.
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Affiliation(s)
- Shenqi Liu
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China
| | - Shanxue Jiang
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China
| | - Zhiliang Yao
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China.
| | - Minhua Liu
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China
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4
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Zhou C, Pan S, Liu P, Feng N, Lu P, Wang Z, Huang C, Wu L, Chen Y. Polystyrene microsphere-mediated optical sensing strategy for ultrasensitive determination of aflatoxin M 1 in milk. Talanta 2023; 258:124357. [PMID: 36870152 DOI: 10.1016/j.talanta.2023.124357] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/05/2023] [Accepted: 02/11/2023] [Indexed: 02/19/2023]
Abstract
Aflatoxin M1 (AFM1) contamination poses a serious threat to human health globally. Hence, it is necessary to develop reliable and ultrasensitive methods for the determination of AFM1 residue in food products at low levels. In this study, a novel polystyrene microsphere-mediated optical sensing (PSM-OS) strategy was constructed to solve the problems of low sensitivity and susceptibility to interference from the matrix in AFM1 determination. Polystyrene (PS) microspheres have the advantages of low cost, high stability, and controllable particle size. They can be useful optical signal probes for qualitative and quantitative analyses attributed to the fact that they have strong ultraviolet-visible (UV-vis) characteristic absorption peaks. Briefly, magnetic nanoparticles were modified with the complex of bovine serum protein and AFM1 (MNP150-BSA-AFM1), and biotinylated antibodies of AFM1 (AFM1-Ab-Bio). Meanwhile, PS microspheres were also functionalized with streptavidin (SA-PS950). In the presence of AFM1, a competitive immune reaction was triggered leading to the changes in AFM1-Ab-Bio concentrations on the surface of MNP150-BSA-AFM1. The complex of MNP150-BSA-AFM1-Ab-Bio binds with SA-PS950 to form the immune complexes due to the special binding of biotin and streptavidin. The remaining SA-PS950 in the supernatant was determined by UV-Vis spectrophotometer after magnetic separation, which positively correlated with the concentration of AFM1. This strategy allows for ultrasensitive determination of AFM1 with limits of detection as low as 3.2 pg/mL. It was also successfully validated for AFM1 determination in milk samples, and a high consistency was found with the chemiluminescence immunoassay. Overall, the proposed PSM-OS strategy can be used for the rapid, ultrasensitive, and convenient determination of AFM1, as well as other biochemical analytes.
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Affiliation(s)
- Cuiyun Zhou
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Shixing Pan
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Puyue Liu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Niu Feng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Peng Lu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Zhipan Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Chenxi Huang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Long Wu
- School of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University. Haikou, 570228, China
| | - Yiping Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, Guangdong, China; Shenzhen Institute of Food Nutrition and Health, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
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5
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Yue Q, Li X, Fang J, Li M, Zhang J, Zhao G, Cao W, Wei Q. Oxygen Free Radical Scavenger PtPd@PDA as a Dual-Mode Quencher of Electrochemiluminescence Immunosensor for the Detection of AFB1. Anal Chem 2022; 94:11476-11482. [PMID: 35950288 DOI: 10.1021/acs.analchem.2c00788] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Here, a dual-mode quenched electrochemiluminescence (ECL) immunosensor based on PtPd@PDA was proposed. Among them, nitrogen-doped hydrazide conjugated carbon dots (NHCDs), as an ECL emitter and a donor of resonance energy transfer, were quenched by PtPd@PDA (receptor). At the same time, PDA in PtPd@PDA, as an oxygen radical scavenger, completed the further quenching of the ECL signal by consuming O2•- generated by the decomposition of co-reactant H2O2. The dual-mode quenching from the above two channels was achieved. In addition, compared with the traditional carbon quantum dots, NHCDs as ECL emitters had lower excitation potential. Moreover, a large number of amino groups provided by aminated MWCNTs could capture more antibodies while connecting with NHCDs. Under the optimum experimental conditions, taking aflatoxin B1 as the target, the proposed sensor with good specificity, stability, and reproducibility had good linearity when the concentration of AFB1 was 0.01-100 ng/mL, with the detection limit of 2.63 pg/mL (S/N = 3). This strategy provided more possibilities for the application of dopamine metal nanocomposites in electrochemiluminescence analysis and offered a new approach to detect AFB1.
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Affiliation(s)
- Qi Yue
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Xuan Li
- Qingdao Bright Moon Seaweed Group Co., Ltd., Qingdao 266000, P. R. China
| | - Jinglong Fang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Min Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Jingjing Zhang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Guanhui Zhao
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Wei Cao
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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Pourtalebi S, Ayatollahi Mousavi SA, Assadollahi Z, Mousavi SM. Assessment of Aflatoxin M1 in human breast milk in Rafsanjan, Iran. Curr Med Mycol 2021; 7:6-11. [PMID: 34553091 PMCID: PMC8443883 DOI: 10.18502/cmm.7.1.6177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/18/2021] [Accepted: 04/12/2021] [Indexed: 11/24/2022] Open
Abstract
Background and Purpose Aflatoxins (AFs) are a group of highly toxic mycotoxins present both in the environment and in foodstuffs. The food of infants should be safe and free of various pollutants, including breast milk mycotoxins. This study aimed to measure the mycotoxin of Aflatoxin M1 (AFM1) in human milk samples obtained from lactating mothers living in Rafsanjan city, Iran. Materials and Methods In the current cross-sectional study, breast milk samples were collected from 150 lactating mothers in Rafsanjan city from September 2015 to April 2016 using the structured food-frequency questionnaire. The AFM1 was measured by employing enzyme-linked immunosorbent assay specific kits. The statistical analysis was performed in SPSS software (version 16). Results The AFM1 was detected in 98 mothers (65%) with a mean concentration of 14.69±8.15 ng/kg, ranging from 5.02 to 41.25 ng/kg. The AFM1 concentration exceeded the tolerable and accepted limit promulgated by the European Union and the USA (25 ng/kg) in only 10 milk samples. Moreover, in 59 milk samples, the AFM1 concentration exceeded the limit recommended by Australia and Switzerland (10 ng/kg). Conclusion According to the results of the present study, lactating mothers and their infants are at risk of AFM1 exposure in southern Iran. Accordingly, the examination of AFM1 concentrations in lactating mothers, as a critical postnatal exposure marker of infants to this carcinogenic compound, requires further studies in various seasonal periods and different parts of Iran.
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Affiliation(s)
- Somayeh Pourtalebi
- Immunology of Infectious Diseases Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Department of Microbiology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | | | - Zahra Assadollahi
- Department of Epidemiology and Biostatistics, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Occupational Environment Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Seyyed Mahdi Mousavi
- Immunology of Infectious Diseases Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Department of Microbiology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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7
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Boonserm P, Puthong S, Wichai T, Noitang S, Khunrae P, Sooksai S, Komolpis K. Investigation of major amino acid residues of anti-norfloxacin monoclonal antibodies responsible for binding with fluoroquinolones. Sci Rep 2021; 11:17140. [PMID: 34433868 PMCID: PMC8387498 DOI: 10.1038/s41598-021-96466-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/10/2021] [Indexed: 12/03/2022] Open
Abstract
It is important to understand the amino acid residues that govern the properties of the binding between antibodies and ligands. We studied the binding of two anti-norfloxacins, anti-nor 132 and anti-nor 155, and the fluoroquinolones norfloxacin, enrofloxacin, ciprofloxacin, and ofloxacin. Binding cross-reactivities tested by an indirect competitive enzyme-linked immunosorbent assay indicated that anti-nor 132 (22–100%) had a broader range of cross-reactivity than anti-nor 155 (62–100%). These cross-reactivities correlated with variations in the numbers of interacting amino acid residues and their positions. Molecular docking was employed to investigate the molecular interactions between the fluoroquinolones and the monoclonal antibodies. Homology models of the heavy chain and light chain variable regions of each mAb 3D structure were docked with the fluoroquinolones targeting the crucial part of the complementarity-determining regions. The fluoroquinolone binding site of anti-nor 155 was a region of the HCDR3 and LCDR3 loops in which hydrogen bonds were formed with TYR (H:35), ASN (H:101), LYS (H:106), ASN (L:92), and ASN (L:93). These regions were further away in anti-nor 132 and could not contact the fluoroquinolones. Another binding region consisting of HIS (L:38) and ASP (H:100) was found for norfloxacin, enrofloxacin, and ciprofloxacin, whereas only ASP (H:100) was found for ofloxacin.
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Affiliation(s)
- Patamalai Boonserm
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Songchan Puthong
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Thanaporn Wichai
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Sajee Noitang
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Pongsak Khunrae
- King Mongkut's University of Technology Thonburi, Bangkok, Thailand
| | - Sarintip Sooksai
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, Thailand.
| | - Kittinan Komolpis
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, Thailand. .,Food Risk Hub, Research Unit of Chulalongkorn University, Bangkok, Thailand.
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Development of a quantum dot-based lateral flow immunoassay with high reaction consistency to total aflatoxins in botanical materials. Anal Bioanal Chem 2021; 413:1629-1637. [PMID: 33495847 DOI: 10.1007/s00216-020-03123-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/09/2020] [Accepted: 12/12/2020] [Indexed: 01/22/2023]
Abstract
Total aflatoxins (AFTs) are an important safety indicator for botanical materials, but at present, rapid detection technology for AFTs is seldom reported. In this study, the monoclonal antibody with similar reactivity to total aflatoxins was produced, and the quantum dot-based lateral flow immunoassay (QD-LFIA) coupled with a portable device was developed to rapidly determine AFT residues in botanical materials. The half maximal inhibitory concentrations (IC50) of the QD-LFIA for AFB1, AFB2, AFG1, AFG2, AFM1, and AFM2 were 10.57, 12.64, 11.34, 12.67, 10.13, and 12.75 μg kg-1, respectively, which show high reaction consistency to total aflatoxins. For different botanical materials, the sample was simply extracted with methanol-water and diluted with PBS, and the sample solution was directly loaded onto the QD-LFIA strip for determination. To overcome interference from the matrix effects, specific standard curves were established for each kind of botanical material. The detection limit of AFTs in 6 different botanical materials was 0.95~2.03 μg kg-1 with a linear range of 2~120 μg kg-1. The spiked recoveries of AFTs in botanical materials of different species and localities of growth were 75~105% with a coefficient of variation below 15%. The test results of the actual samples are consistent with the Chinese national standard test method. This study provides an easy-to-use method to rapidly determine AFTs in different botanical materials. Graphical abstract.
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Songthammanuphap S, Puthong S, Pongma C, Buakeaw A, Prammananan T, Warit S, Tipkantha W, Kaewkhunjob E, Yindeeyoungyeon W, Palaga T. Detection of Mycobacterium tuberculosis complex infection in Asian elephants (Elephas maximus) using an interferon gamma release assay in a captive elephant herd. Sci Rep 2020; 10:14551. [PMID: 32883961 PMCID: PMC7471291 DOI: 10.1038/s41598-020-71099-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/10/2020] [Indexed: 11/25/2022] Open
Abstract
Tuberculosis is highly contagious disease that can be transmitted between humans and animals. Asian elephants (Elephas maximus) in captivity live in close contact with humans in many Asian countries. In this study, we developed an interferon gamma release assay (IGRA) for elephant TB detection using antigens from the MTB complex (MTBC) and nontuberculous mycobacteria (NTM) as stimulating antigens (PPD, ESAT6, CFP10) to elicit a cell-mediated immune response (CMIR). The developed assay was applied to an elephant herd of more than 60 animals in Thailand, and the results were compared with those obtained through serological detection. IGRA has sufficient sensitivity for detecting elephant interferon gamma (eIFNγ) from specific antigen-stimulated PBMCs. Among 60 animals tested, 20 samples (33.3%) showed negative results for both MTBC and NTM infection. Eighteen samples (30%) showed positive responses against PPD from M. bovis and/or ESAT6 and CFP10, indicating MTBC infection. In contrast, only 15.6% showed seropositivity in a commercial serological test kit for elephant TB. The discrepancies between serological and CMIR highlight that the two methods may detect different stages of elephant TB. Therefore, employing both tests may enable them to complement each other in correctly identifying elephants that have been exposed to MTBC.
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Affiliation(s)
- Songkiat Songthammanuphap
- Graduate Program in Microbiology and Microbial Technology, Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.,Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Songchan Puthong
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Chitsuda Pongma
- Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.,Inter-Department Graduate Program in Biotechnology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Anumart Buakeaw
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Therdsak Prammananan
- The National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Saradee Warit
- The National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Wanlaya Tipkantha
- The Zoological Park Organization of Thailand, Bureau of Conservation and Research, Pracharat Sai 1 Road, BangSue, Bangkok, 10800, Thailand
| | - Erngsiri Kaewkhunjob
- The Zoological Park Organization of Thailand, Bureau of Conservation and Research, Pracharat Sai 1 Road, BangSue, Bangkok, 10800, Thailand
| | - Wandee Yindeeyoungyeon
- The National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand.
| | - Tanapat Palaga
- Graduate Program in Microbiology and Microbial Technology, Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand. .,Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.
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10
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Pimpitak U, Rengpipat S, Phutong S, Buakeaw A, Komolpis K. Development and validation of a lateral flow immunoassay for the detection of aflatoxin M1 in raw and commercialised milks. INT J DAIRY TECHNOL 2020. [DOI: 10.1111/1471-0307.12728] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Umaporn Pimpitak
- Institute of Biotechnology and Genetic Engineering Chulalongkorn University Bangkok10330Thailand
| | - Sirirat Rengpipat
- Department of Microbiology Faculty of Science Chulalongkorn University Bangkok10330Thailand
| | - Songchan Phutong
- Institute of Biotechnology and Genetic Engineering Chulalongkorn University Bangkok10330Thailand
| | - Anumart Buakeaw
- Institute of Biotechnology and Genetic Engineering Chulalongkorn University Bangkok10330Thailand
| | - Kittinan Komolpis
- Institute of Biotechnology and Genetic Engineering Chulalongkorn University Bangkok10330Thailand
- Food Risk Hub Research Unit of Chulalongkorn University Bangkok10330Thailand
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11
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Pang YH, Guo LL, Shen XF, Yang NC, Yang C. Rolling circle amplified DNAzyme followed with covalent organic frameworks: Cascade signal amplification of electrochemical ELISA for alfatoxin M1 sensing. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136055] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Immunochemical assay with monoclonal antibodies for detection of staphylococcal enterotoxin H. J Food Drug Anal 2018; 26:741-750. [PMID: 29567245 PMCID: PMC9322225 DOI: 10.1016/j.jfda.2017.10.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 09/26/2017] [Accepted: 10/27/2017] [Indexed: 01/15/2023] Open
Abstract
Staphylococcal enterotoxins cause food poisoning of various degrees of severity. For milk and meat products, there is a high probability of contamination with staphylococcal enterotoxin H (SEH). In this regard specific and sensitive methods are required to be developed for its detection and monitoring. In this work, the gene seh was expressed and a preparation of recombinant toxin was obtained. Using hybridoma technology, a panel of high-affinity monoclonal antibodies (mAbs) to SEH was produced. The antibodies were characterized and shown to have no cross-reactivity towards the main staphylococcal enterotoxins (A, B, C1, D, E, G and I). Based on these mAbs, a method for specific and quantitative detection of SEH was developed in the format of sandwich enzyme immunoassay (linear range, 0.2–3 ng/ml). All the mAbs produced revealed SEH by immunoblotting. Immunochemical analysis of the culture fluids of staphylococcal isolates obtained from the milk of mastitis-infected cows by immunoblotting and sandwich enzyme immunoassay demonstrated the conformity of these methods. Using the developed method, the toxin was revealed in blood serum and liquid food products practically to 100%. From non-liquid foods, it was shown to be extracted to a maximum with a buffer of pH 4.0–4.5.
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13
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Schubert M, Spiegel H, Schillberg S, Nölke G. Aspergillus-specific antibodies - Targets and applications. Biotechnol Adv 2018; 36:1167-1184. [PMID: 29608951 DOI: 10.1016/j.biotechadv.2018.03.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 12/16/2022]
Abstract
Aspergillus is a fungal genus comprising several hundred species, many of which can damage the health of plants, animals and humans by direct infection and/or due to the production of toxic secondary metabolites known as mycotoxins. Aspergillus-specific antibodies have been generated against polypeptides, polysaccharides and secondary metabolites found in the cell wall or secretions, and these can be used to detect and monitor infections or to quantify mycotoxin contamination in food and feed. However, most Aspergillus-specific antibodies are generated against heterogeneous antigen preparations and the specific target remains unknown. Target identification is important because this can help to characterize fungal morphology, confirm host penetration by opportunistic pathogens, detect specific disease-related biomarkers, identify new candidate targets for antifungal drug design, and qualify antibodies for diagnostic and therapeutic applications. In this review, we discuss how antibodies are raised against heterogeneous Aspergillus antigen preparations and how they can be characterized, focusing on strategies to identify their specific antigens and epitopes. We also discuss the therapeutic, diagnostic and biotechnological applications of Aspergillus-specific antibodies.
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Affiliation(s)
- Max Schubert
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany
| | - Holger Spiegel
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany
| | - Stefan Schillberg
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany; Justus-Liebig University Giessen, Institute for Phytopathology and Applied Zoology, Phytopathology Department, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany.
| | - Greta Nölke
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany
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Li H, Yang D, Li P, Zhang Q, Zhang W, Ding X, Mao J, Wu J. Palladium Nanoparticles-Based Fluorescence Resonance Energy Transfer Aptasensor for Highly Sensitive Detection of Aflatoxin M₁ in Milk. Toxins (Basel) 2017; 9:toxins9100318. [PMID: 29027938 PMCID: PMC5666365 DOI: 10.3390/toxins9100318] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 12/21/2022] Open
Abstract
A highly sensitive aptasensor for aflatoxin M1 (AFM1) detection was constructed based on fluorescence resonance energy transfer (FRET) between 5-carboxyfluorescein (FAM) and palladium nanoparticles (PdNPs). PdNPs (33 nm) were synthesized through a seed-mediated growth method and exhibited broad and strong absorption in the whole ultraviolet-visible (UV-Vis) range. The strong coordination interaction between nitrogen functional groups of the AFM1 aptamer and PdNPs brought FAM and PdNPs in close proximity, which resulted in the fluorescence quenching of FAM to a maximum extent of 95%. The non-specific fluorescence quenching caused by PdNPs towards fluorescein was negligible. After the introduction of AFM1 into the FAM-AFM1 aptamer-PdNPs FRET system, the AFM1 aptamer preferentially combined with AFM1 accompanied by conformational change, which greatly weakened the coordination interaction between the AFM1 aptamer and PdNPs. Thus, fluorescence recovery of FAM was observed and a linear relationship between the fluorescence recovery and the concentration of AFM1 was obtained in the range of 5–150 pg/mL in aqueous buffer with the detection limit of 1.5 pg/mL. AFM1 detection was also realized in milk samples with a linear detection range from 6 pg/mL to 150 pg/mL. The highly sensitive FRET aptasensor with simple configuration shows promising prospect in detecting a variety of food contaminants.
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Affiliation(s)
- Hui Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
| | - Daibin Yang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
| | - Peiwu Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China.
| | - Qi Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China.
| | - Wen Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China.
| | - Xiaoxia Ding
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China.
| | - Jin Mao
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
| | - Jing Wu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China.
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China.
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15
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Matabaro E, Ishimwe N, Uwimbabazi E, Lee BH. Current Immunoassay Methods for the Rapid Detection of Aflatoxin in Milk and Dairy Products. Compr Rev Food Sci Food Saf 2017; 16:808-820. [DOI: 10.1111/1541-4337.12287] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/11/2017] [Accepted: 06/14/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Emmanuel Matabaro
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan Univ.; Wuxi Jiangsu 214122 China
| | - Nestor Ishimwe
- Hefei Natl. Laboratory for Physical Sciences at Microscale and School of Life Sciences; Univ. of Science and Technology of China; Hefei Anhui 230027 China
- the Dept. of Chemistry, College of Science and Technology; Univ. of Rwanda; Rwanda
| | - Eric Uwimbabazi
- School of Food Science; Jiangnan Univ.; Wuxi Jiangsu 214122 China
| | - Byong H. Lee
- Dept. of Microbiology and Immunology; McGill Univ.; Montreal QC H3A 2B4 Canada
- Dept. of Food Science and Biotechnology; Kangwon Natl. Univ.; Chuncheon 200701 South Korea
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