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Ding Y, Huang C, Zhang Y, Wang J, Wang X. Magnetic microbead enzyme-linked immunoassay based on phage encoded protein RBP 41-mediated for rapid and sensitive detection of Salmonella in food matrices. Food Res Int 2023; 163:112212. [PMID: 36596140 DOI: 10.1016/j.foodres.2022.112212] [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: 08/30/2022] [Revised: 11/07/2022] [Accepted: 11/15/2022] [Indexed: 11/27/2022]
Abstract
Rapid and sensitive quantitative detection methods are required to monitor and detect Salmonella throughout the food supply chain and early prevention of foodborne disease outbreaks. In this study, a magnetic microbead enzyme-linked immunoassay (MELISA) based on phage receptor binding protein was developed for rapid enrichment and detection of Salmonella in complex food matrices. RBP 41 from phage T102 acted as a species-specific recognition element for Salmonella by exploiting its strong binding capacity to Salmonella surface receptors. RBP 41-MBs were prepared by coupling recombinant RBP 41 with MBs and used to separate and enrich Salmonella cells from spiked food samples. The captured complexes were further integrated with ELISA procedures by HRP-labeled anti-Salmonella antibody for rapid and accurate detection of Salmonella. The whole method took <1.5 h and the detection limit was 10 CFU/mL. Therefore, MELISA was successfully developed for the detection of Salmonella in various spiked food samples (skim milk, lettuce, and chicken breast). The ELISA reaction process of this method was carried out on magnetic beads. It simplified the process of the traditional ELISA method and reduces the reaction time. This study expanded the use of phage-associated proteins and demonstrated the promising prospects for practical applications in the detection of foodborne pathogens.
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Affiliation(s)
- Yifeng Ding
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Chenxi Huang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Yiming Zhang
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jia Wang
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Xiaohong Wang
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Ghavamipour F, Rahmani H, Shanehsaz M, Khajeh K, Mirshahi M, Sajedi RH. Enhanced sensitivity of VEGF detection using catalase-mediated chemiluminescence immunoassay based on CdTe QD/H 2O 2 system. J Nanobiotechnology 2020; 18:93. [PMID: 32552818 PMCID: PMC7302009 DOI: 10.1186/s12951-020-00648-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/11/2020] [Indexed: 02/06/2023] Open
Abstract
Background Since vascular endothelial growth factor (VEGF) is a significant regulator of cancer angiogenesis, it is essential to develop a technology for its sensitive detection. Herein, we sensitized a chemiluminescence (CL) immunoassay through the combination of H2O2-sensitive TGA-CdTe quantum dot (QD) as signal transduction, dextran as a cross-linker to prepare enzyme-labeled antigen and the ultrahigh bioactivity of catalase (CAT) as reporter enzyme. Results Under the optimized experimental conditions, the chemiluminescence enzyme-linked immunosorbent assay (CL-ELISA) method can detect VEGF in the excellent linear range of 2–35,000 pg mL−1, with a detection limit (S/N = 3) of 0.5 pg mL−1 which was approximately ten times lower than the commercial colorimetric immunoassay. This proposed method has been successfully applied to the clinical determination of VEGF in the human serum samples, and the results illustrated an excellent correlation with the conventional ELISA method (R2 = 0.997). The suitable recovery rate of the method in the serum ranged from 97 to 107%, with a relative standard deviation of 1.2% to 13.4%. Conclusions The novel immunoassay proposes a highly sensitive, specific, and stable method for very low levels detection of VEGF that can be used in the primary diagnosis of tumors. With the well-designed sensing platform, this approach has a broad potential to be applied for quantitative analysis of numerous disease-related protein biomarkers for which antibodies are available.![]()
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Affiliation(s)
- Fahimeh Ghavamipour
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran
| | - Hossein Rahmani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran
| | - Maryam Shanehsaz
- Analytical Chemistry Research Laboratory, Mobin Shimi Azma Company, Tehran, Iran
| | - Khosro Khajeh
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran
| | - Manouchehr Mirshahi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran
| | - Reza H Sajedi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran.
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Fu X, Liu Y, Qiu R, Foda MF, Zhang Y, Wang T, Li J. The fabrication of magnetic particle-based chemiluminescence immunoassay for human epididymis protein-4 detection in ovarian cancer. Biochem Biophys Rep 2018; 13:73-77. [PMID: 29387811 PMCID: PMC5772505 DOI: 10.1016/j.bbrep.2018.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 12/26/2017] [Accepted: 01/04/2018] [Indexed: 11/25/2022] Open
Abstract
The magnetic particles have a significant influence on the immunoassay detection and cancer therapy. Herein, the chemiluminescence immunoassay combined with the magnetic particles (MPCLIA) was presented for the clinical determination and analysis of human epididymis protein 4 (HE4) in the human serum. Under the optimized experiment conditions, the secure MPCLIA method can detect HE4 in the broader range of 0–1000 pmol/L, with a lower detection limit of 1.35 pmol/L. The satisfactory recovery rate of the method in the serum ranged from 83.62% to 105.10%, which was well within the requirement of clinical analysis. Moreover, the results showed the good correlation with enzyme-linked immunosorbent assay (ELISA), with the correlation coefficient of 0.9589. This proposed method has been successfully applied to the clinical determination of HE4 in the human serum. A high-sensitivity, relatively simple and rapid MPCLIA has been successfully developed for the clinical determination of HE4 in human serum. The quantitative determination for HE4 in the serum samples was with satisfactory recoveries ranging from 83% to 105%. The magnetic particle-based chemiluminescence immunoassays could be used for the quantitative detection of other tumor markers. This assay provides apparent advantages and shows great potential in the clinical diagnosis.
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Affiliation(s)
- Xiaoling Fu
- Department of Orthopedic, The 2nd Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province 330006, PR China
| | - Yangyang Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Ruiyun Qiu
- Computer Center, Nanchang University, Nanchang, Jiangxi Province 330006, PR China
| | - Mohamed F. Foda
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
- Department of Biochemistry, Faculty of Agriculture, Benha University, Moshtohor, Toukh 13736, Egypt
| | - Yong Zhang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Tao Wang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Jinshan Li
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
- Corresponding author at: College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China.College of Life Science and Technology, Huazhong Agricultural UniversityWuhanHubei430070PR China
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Xie G, Zhu M, Liu Z, Zhang B, Shi M, Wang S. Development and evaluation of the magnetic particle-based chemiluminescence immunoassay for rapid and quantitative detection of Aflatoxin B1 in foodstuff. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1416591] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Gang Xie
- College of Food Engineering and Biotechnology, Tianjin University of Science & Technology, Tianjin, People’s Republic of China
- Academy of State Administration of Grain, Beijing, People’s Republic of China
| | - Ming Zhu
- Guizhou Entry-Exit Inspection and Quarantine Bureau of The People’s Republic of China, Guizhou, People’s Republic of China
| | - Zhenjiang Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Bo Zhang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Mingjin Shi
- Kangyuan Techbio Biological Technology Co., Ltd, Suqian, People’s Republic of China
| | - Shuo Wang
- College of Food Engineering and Biotechnology, Tianjin University of Science & Technology, Tianjin, People’s Republic of China
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Hinz R, Schwarz NG, Hahn A, Frickmann H. Serological approaches for the diagnosis of schistosomiasis - A review. Mol Cell Probes 2016; 31:2-21. [PMID: 27986555 DOI: 10.1016/j.mcp.2016.12.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 11/28/2016] [Accepted: 12/12/2016] [Indexed: 01/14/2023]
Abstract
Schistosomiasis is a common disease in endemic areas of Sub-Saharan Africa, South America and Asia. It is rare in Europe, mainly imported from endemic countries due to travelling or human migration. Available methods for the diagnosis of schistosomiasis comprise microscopic, molecular and serological approaches, with the latter detecting antigens or antibodies associated with Schistosoma spp. infection. The serological approach is a valuable screening tool in low-endemicity settings and for travel medicine, though the interpretation of any diagnostic results requires knowledge of test characteristics and a patient's history. Specific antibody detection by most currently used assays is only possible in a relatively late stage of infection and does not allow for the differentiation of acute from previous infections for therapeutic control or the discrimination between persisting infection and re-infection. Throughout the last decades, new target antigens have been identified, and assays with improved performance and suitability for use in the field have been developed. For numerous assays, large-scale studies are still required to reliably characterise assay characteristics alone and in association with other available methods for the diagnosis of schistosomiasis. Apart from S. mansoni, S. haematobium and S. japonicum, for which most available tests were developed, other species of Schistosoma that occur less frequently need to be taken into account. This narrative review describes and critically discusses the results of published studies on the evaluation of serological assays that detect antibodies against different Schistosoma species of humans. It provides insights into the diagnostic performance and an overview of available assays and their suitability for large-scale use or individual diagnosis, and thus sets the scene for serological diagnosis of schistosomiasis and the interpretation of results.
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Affiliation(s)
- Rebecca Hinz
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Germany; Department of Tropical Medicine at the Bernhard Nocht Institute, German Armed Forces Hospital Hamburg, Germany.
| | | | - Andreas Hahn
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | - Hagen Frickmann
- Department of Tropical Medicine at the Bernhard Nocht Institute, German Armed Forces Hospital Hamburg, Germany; Institute for Medical Microbiology, Virology and Hygiene, University Medicine Rostock, Germany
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Sobczak-Kupiec A, Venkatesan J, Alhathal AlAnezi A, Walczyk D, Farooqi A, Malina D, Hosseini SH, Tyliszczak B. Magnetic nanomaterials and sensors for biological detection. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:2459-2473. [DOI: 10.1016/j.nano.2016.07.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 07/07/2016] [Accepted: 07/08/2016] [Indexed: 12/31/2022]
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Candido RRF, Favero V, Duke M, Karl S, Gutiérrez L, Woodward RC, Graeff-Teixeira C, Jones MK, St Pierre TG. The affinity of magnetic microspheres for Schistosoma eggs. Int J Parasitol 2014; 45:43-50. [PMID: 25305086 DOI: 10.1016/j.ijpara.2014.08.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 08/07/2014] [Accepted: 08/09/2014] [Indexed: 11/16/2022]
Abstract
Schistosomiasis is a chronic parasitic disease of humans, with two species primarily causing the intestinal infection: Schistosoma mansoni and Schistosoma japonicum. Traditionally, diagnosis of schistosomiasis is achieved through direct visualisation of eggs in faeces using techniques that lack the sensitivity required to detect all infections, especially in areas of low endemicity. A recently developed method termed Helmintex™ is a very sensitive technique for detection of Schistosoma eggs and exhibits 100% sensitivity at 1.3 eggs per gram of faeces, enough to detect even low-level infections. The Helminthex™ method is based on the interaction of magnetic microspheres and schistosome eggs. Further understanding the underlying egg-microsphere interactions would enable a targeted optimisation of egg-particle binding and may thus enable a significant improvement of the Helmintex™ method and diagnostic sensitivity in areas with low infection rates. We investigated the magnetic properties of S. mansoni and S. japonicum eggs and their interactions with microspheres with different magnetic properties and surface functionalization. Eggs of both species exhibited higher binding affinity to the magnetic microspheres than the non-magnetic microspheres. Binding efficiency was further enhanced if the particles were coated with streptavidin. Schistosoma japonicum eggs bound more microspheres compared with S. mansoni. However, distinct differences within eggs of each species were also observed when the distribution of the number of microspheres bound per egg was modelled with double Poisson distributions. Using this approach, both S. japonicum and S. mansoni eggs fell into two groups, one having greater affinity for magnetic microspheres than the other, indicating that not all eggs of a species exhibit the same binding affinity. Our observations suggest that interaction between the microspheres and eggs is more likely to be related to surface charge-based electrostatic interactions between eggs and magnetic iron oxide rather than through a direct magnetic interaction.
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Affiliation(s)
- Renata R F Candido
- Laboratório de Biologia Parasitária, Faculdade de Biociências e Laboratório de Parasitologia Molecular, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil; QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia; School of Physics, The University of Western Australia, Crawley, Western Australia, Australia.
| | - Vivian Favero
- Laboratório de Biologia Parasitária, Faculdade de Biociências e Laboratório de Parasitologia Molecular, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Mary Duke
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Stephan Karl
- School of Physics, The University of Western Australia, Crawley, Western Australia, Australia; Infection and Immunity Division, Walter and Eliza Hall Institute, Parkville, Victoria, Australia; Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Lucía Gutiérrez
- School of Physics, The University of Western Australia, Crawley, Western Australia, Australia; Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Consejo Superior de Investigaciones Científicas, Cantoblanco, Madrid, Spain
| | - Robert C Woodward
- School of Physics, The University of Western Australia, Crawley, Western Australia, Australia
| | - Carlos Graeff-Teixeira
- Laboratório de Biologia Parasitária, Faculdade de Biociências e Laboratório de Parasitologia Molecular, Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Malcolm K Jones
- School of Veterinary Sciences, The University of Queensland, Australia; QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Timothy G St Pierre
- School of Physics, The University of Western Australia, Crawley, Western Australia, Australia
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MU XH, TONG ZY, HUANG QB, LIU B, LIU ZW, HAO LQ, ZHANG JP. Magnetic Affinity Immunoassay Based Enzyme-labeled Phage Displayed Antibody. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1016/s1872-2040(13)60736-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang B, Du D, Meng M, Eremin SA, Rybakov VB, He X, Yin Y, Xi R. A Magnetic Particle-Based Competitive Enzyme Immunoassay for Rapid Determination of Ciprofloxacin: A Potential Method for the General Detection of Fluoroquinolones. ANAL LETT 2014. [DOI: 10.1080/00032719.2013.865197] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yu Q, Yang H, Guan F, Feng Y, Yang X, Zhu Y. Detection of IgG in sera of patients with schistosomiasis japonica by developing magnetic affinity enzyme-linked immunoassay based on recombinant 14-3-3 protein. Trans R Soc Trop Med Hyg 2013; 108:37-41. [DOI: 10.1093/trstmh/trt097] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yi L, Huang Y, Wu T, Wu J. A magnetic nanoparticles-based method for DNA extraction from the saliva of stroke patients. Neural Regen Res 2013; 8:3036-46. [PMID: 25206624 PMCID: PMC4146207 DOI: 10.3969/j.issn.1673-5374.2013.32.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 08/27/2013] [Indexed: 11/18/2022] Open
Abstract
C677T polymorphism in the methylenetetrahydrofolate reductase (MTHFR) gene is a risk factor for stroke, suggesting that widespread detection could help to prevent stroke. DNA from 70 stroke patients and 70 healthy controls was extracted from saliva using a magnetic nanoparticles-based method and from blood using conventional methods. Real-time PCR results revealed that the C677T polymorphism was genotyped by PCR using DNA extracted from both saliva and blood samples. The genotype results were confirmed by gene sequencing, and results for saliva and blood samples were consistent. The mutation TT genotype frequency was significantly higher in the stroke group than in controls. Homocysteine levels were significantly higher than controls in both TT genotype groups. Therefore, this noninvasive magnetic nanoparticles-based method using saliva samples could be used to screen for the MTHFR C677T polymorphism in target populations.
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Affiliation(s)
- Li Yi
- Department of Neurology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Ying Huang
- Department of Neurology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Ting Wu
- Department of Neurology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Jun Wu
- Department of Neurology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
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Konstantinidis S, Kong S, Titchener-Hooker N. Identifying analytics for high throughput bioprocess development studies. Biotechnol Bioeng 2013; 110:1924-35. [PMID: 23334907 DOI: 10.1002/bit.24850] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 12/01/2012] [Accepted: 01/07/2013] [Indexed: 12/31/2022]
Abstract
In recent years, high throughput screening (HTS) studies have been increasingly employed as an integral element of bioprocess development activities. These studies are often limited by an analytical bottleneck; they generate multiple samples for analysis and the available analytical methods cannot always cope with the added analytical burden. A potential solution to this challenge is offered by the deployment of appropriate analytics. This article outlines features of analytical methods that affect their fit to high throughput (HT) applications. These are discussed for a range of analytics frequently used in bioprocess development studies of monoclonal antibodies. It then outlines how these features need to be considered in order to classify analytical methods in terms of their particular application in high throughput scenarios.
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Affiliation(s)
- Spyridon Konstantinidis
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
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Yu Q, Yang H, Feng Y, Yang X, Zhu Y. Magnetic affinity enzyme-linked immunoassay based on recombinant 26 kDa glutathione-S-transferase for serological diagnosis of schistosomiasis japonica. Acta Trop 2012; 124:199-202. [PMID: 22940100 DOI: 10.1016/j.actatropica.2012.08.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 08/04/2012] [Accepted: 08/09/2012] [Indexed: 11/19/2022]
Abstract
Schistosomiasis remains a serious worldwide public health problem. Improving the diagnostic assay for surveillance and monitoring will contribute to hastening the possible elimination of the disease in endemic regions. Therefore, this study aims to develop magnetic affinity enzyme-linked immunoassay (MEIA) for serological diagnosis of schistosomiasis based on recombinant 26kDa glutathione-S-transferase of Schistosoma japonicum (rSj26GST). BALB/c mice infected with S. japonicum cercariae (40 per mouse) were used. After infecting for 6 weeks, the antibody was detected by MEIA. All of the infected mouse sera were effectively determined by MEIA. Compared with the enzyme-linked immunosorbent assay (ELISA), MEIA has a higher ratio of the mean positive value to the mean negative value (P/N) at the same dilution ratio (3.92 versus 2.66). MEIA was further applied for diagnosis of human schistosomiasis. Sera from 28 schistosomiasis-confirmed patients with low-intensity infection, 15 treated patients, and 20 non-endemic negative controls, were used to assess the assay. The results showed that MEIA and ELISA had similarity in positive detection rates. However, the higher P/N of MEIA was observed at the same dilution ratio. MEIA had high negative rate in detection of specific IgG in the treated patients. Moreover, there was no cross reaction with the sera of paragonimiasis patients. These results suggested that MEIA based on rSj26GST is a simple, rapid, convenient assay for the diagnosis of schistosomiasis.
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Affiliation(s)
- Qin Yu
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
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Yu Q, Yang H, Feng Y, Zhu Y, Yang X. Magnetic affinity enzyme-linked immunoassay for diagnosis of Schistosomiasis japonicum in persons with low-intensity infection. Am J Trop Med Hyg 2012; 87:689-93. [PMID: 22869635 DOI: 10.4269/ajtmh.2012.11-0716] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Most schistosome-endemic areas in China are characterized by low-intensity infections that are independent of prevalence. To establish an effective diagnostic method, we developed a magnetic affinity enzyme-linked immunoassay based on soluble egg antigens (SEA-MEIA) for diagnosing schistosomiasis in persons with low-intensity infection with Schistosoma japonicum by comparing it with a conventional enzyme-linked immunosorbent assay (ELISA). Our results showed that the SEA-MEIA had a higher sensitivity and greater precision in the diagnosis of low-intensity S. japonicum infections than the ELISA. In addition, when we used Pearson's correlation in associating SEA-MEIA with ELISA, a significant correlation existed between the two assays (r = 0.845, P < 0.001). Our data indicated that SEA-MEIA, with a higher sensitivity and greater ease of performance, would be valuable for diagnosis of schistosomiasis japonicum in persons with low-intensity infections.
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Affiliation(s)
- Qin Yu
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Wuhan, People's Republic of China.
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Bevilacqua N, Pane S, Vairo F, Nicastri E, Paglia MG, Ame SM, Schepisi MS, Kitua A, Mangi S, Racalbuto V, Meschi S, Ippolito G. Accuracy of indirect haemagglutination and western blot assays for the detection of anti-Schistosoma antibodies in non-severe febrile patients in two Tanzanian hospitals. ACTA ACUST UNITED AC 2012; 44:453-8. [DOI: 10.3109/00365548.2011.645505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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A fluoro-microbead guiding chip for simple and quantifiable immunoassay of cardiac troponin I (cTnI). Biosens Bioelectron 2011; 26:3818-24. [DOI: 10.1016/j.bios.2011.02.036] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 01/08/2011] [Accepted: 02/23/2011] [Indexed: 11/21/2022]
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