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Gao H, Wen L, Hua W, Tian J, Lin Y. Highly sensitive immunosensing platform for one-step detection of genetically modified crops. Sci Rep 2019; 9:16117. [PMID: 31695115 PMCID: PMC6834675 DOI: 10.1038/s41598-019-52651-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/10/2019] [Indexed: 12/18/2022] Open
Abstract
The wide cultivation of genetically modified (GM) insect-resistant crops has raised concerns on the risks to the eco-environment resulting from a release of Cry proteins. Therefore, it is vital to develop a method for the quantification of GM crops. Herein, A highly sensitive immunosensing platform has been developed for both colorimetric and chemiluminescent (CL) detection of Cry 1Ab using dual-functionalized gold nanoparticles (AuNPs) as signal amplification nanoprobes for the first time. In this work, anti-Cry 1Ab monoclonal antibody and horseradish peroxidase (HRP) are simultaneously functionalized on the surface of AuNPs with an exceptionally simple synthesis method. Combined with immunomagnetic separation, this immunosensing platform based on colorimetric method could detect Cry 1Ab in one step in a linear range from 1.0 to 40 ng mL−1 within 1.5 h, with a limit of detection of 0.50 ng mL−1. The sensitivity of fabricated nanoprobes was 15.3 times higher than that using commercial HRP-conjugated antibody. Meanwhile, the fabricated nanoprobes coupled with CL detection was successfully applied for Cry 1Ab detection with a minimum detection concentration of 0.050 ng mL−1 within a linear range of 0.10–20 ng mL−1. The proposed approach was validated with genuine GM crops, and the results showed a good correlation coefficient of 0.9906 compared to those of a commercial ELISA kit. Compared with ELISA, the developed immunosensing platform significantly simplified the assay procedure and shortened the analytical time, thus providing a new platform for the detection of genetically modified crops with high sensitivity, rapidity and simplicity.
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Affiliation(s)
- Hongfei Gao
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.,Key Laboratory of Oil Crop Biology of the Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Luke Wen
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Wei Hua
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Jing Tian
- MOE Key Laboratory of Environment Correlative Dietology, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Yongjun Lin
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
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2
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Gao H, Wen L, Tian J, Wu Y, Liu F, Lin Y, Hua W, Wu G. A portable electrochemical immunosensor for highly sensitive point-of-care testing of genetically modified crops. Biosens Bioelectron 2019; 142:111504. [PMID: 31401226 DOI: 10.1016/j.bios.2019.111504] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 07/02/2019] [Accepted: 07/12/2019] [Indexed: 01/27/2023]
Abstract
The wide cultivation of genetically modified (GM) crops has raised concerns on the risks to humans and the environment. 5-enolpyruvylshikimate-3-phosphate synthase isolated from Agrobacterium species strain CP4 (CP4-EPSPS) protein is most widely present in these crops. Therefore the measurement of CP4-EPSPS sensitively in a point-of-care testing (POCT) manner for the screening of transgenic plants is demanded. To date the development of quantitative POCT system has not yet been reported. In presented study, an electrochemical immunosensor towards CP4-EPSPS has been fabricated by integrating a portable bioanalytical device with a disposable screen-printed carbon electrode (SPCE) for POCT of GM crops. The dual-functionalized AuNPs were used as nanoprobes and prepared by simultaneously tagging horseradish peroxidase (HRP) and antibody on AuNPs with an exceptionally simple protocol. The sensitivity of the developed nanoprobe-based immunosensor was 62.5-fold higher than that using HRP-labeled antibody. As a result, the proposed immunosensor using SPCE could detect CP4-EPSPS down to 0.050 ng mL-1 with the linear range of 0.10-10 ng mL-1 within 65 min. In addition, the developed method has been validated with genuine GM crops and the results show a good correlation coefficient of 0.9909 compared with those of a commercial ELISA kit. Therefore, this portable electrochemical immunosensor is suitable for rapid and sensitive detection and provides a convenient and reliable platform for POCT assay.
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Affiliation(s)
- Hongfei Gao
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China; National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China
| | - Luke Wen
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Jing Tian
- MOE Key Laboratory of Environment Correlative Dietology, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuhua Wu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Fang Liu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, 430070, China.
| | - Wei Hua
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.
| | - Gang Wu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.
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3
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Duan HB, Cao JT, Yang JJ, Wang H, Liu YM. Simultaneous determination of four local anesthetics by CE with ECL and study on interaction between procainamide and human serum albumin. Talanta 2016; 154:341-5. [DOI: 10.1016/j.talanta.2016.03.093] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 03/23/2016] [Accepted: 03/28/2016] [Indexed: 01/18/2023]
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4
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Zhang Q, Xu G, Gong L, Dai H, Zhang S, Li Y, Lin Y. An enzyme-assisted electrochemiluminescent biosensor developed on order mesoporous carbons substrate for ultrasensitive glyphosate sensing. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.10.081] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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5
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Gui GF, Zhuo Y, Chai YQ, Xiang Y, Yuan R. The Ru complex and hollow gold nanoparticles branched-hydrogel as signal probe for construction of electrochemiluminescent aptasensor. Biosens Bioelectron 2015; 77:7-12. [PMID: 26385731 DOI: 10.1016/j.bios.2015.09.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/19/2015] [Accepted: 09/07/2015] [Indexed: 10/23/2022]
Abstract
In this work, a novel Ru complex and hollow gold nanoparticles branched-poly(N-(3-aminopropyl)methacrylamide) hydrogel composites (pNAMA-Ru-HGNPs) were prepared and used as electrogenerated chemiluminescence (ECL) signal probe to construct aptasensor for ultrasensitive detection of thrombin (TB). Herein, [Ru(phen)2(cpaphen)](2+) linked N-(3-aminopropyl)methacrylamide and hollow gold nanoparticles functionalized N-(3-aminopropyl)methacrylamide were used as two polymer monomers to prepare pNAMA-Ru-HGNPs composites via free-radical polymerization. The obtained hydrogel composite, containing amount of Ru complex and HGNPs, were used as effective tag-carriers for the immobilization of thrombin binding aptamer II (TBA II) to form the pNAMA-Ru-HGNPs labeled TBA II (pNAMA-Ru-HGNPs-TBA II). For building the interface of the aptasensor, dendritic gold nanoparticles reduced by poly(ethyleneimine) (PEI@DGNPs) were modified on the carbon nanotube-nafion (CNTs-Nf) coated electrode through electrostatic adsorption, which was used not only as matrix for immobilization of thrombin binding aptamer I (TBA I) but also as enhancer to amplify the ECL signal because PEI is an efficient co-reactant of Ru complex. Target TB was sandwiched between pNAMA-Ru-HGNPs-TBA II and TBA I, resulting in the ECL signals relevant to the TB concentrations. Combining the novel pNAMA-Ru-HGNPs containing amount of Ru complex as the ECL signal probe and PEI@DGNPs as the enhancer for signal amplification, the sandwich ECL aptasensor was constructed for the detection of TB with a wide range of 1.0 fM to 10 pM and a low detection of 0.54 fM.
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Affiliation(s)
- Guo-Feng Gui
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; College of Chemical Engineering, Guizhou University of Engineering Science, Guizhou 551700, China
| | - Ying Zhuo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Ya-Qin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yun Xiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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6
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Wang D, Li Y, Lin Z, Qiu B, Guo L. Surface-Enhanced Electrochemiluminescence of Ru@SiO2 for Ultrasensitive Detection of Carcinoembryonic Antigen. Anal Chem 2015; 87:5966-72. [DOI: 10.1021/acs.analchem.5b01038] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Daifang Wang
- Institute
of Nanomedicine
and Nanobiosensing, Ministry of Education Key Laboratory of Analysis
and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Yanyan Li
- Institute
of Nanomedicine
and Nanobiosensing, Ministry of Education Key Laboratory of Analysis
and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Zhenyu Lin
- Institute
of Nanomedicine
and Nanobiosensing, Ministry of Education Key Laboratory of Analysis
and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Bin Qiu
- Institute
of Nanomedicine
and Nanobiosensing, Ministry of Education Key Laboratory of Analysis
and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
| | - Longhua Guo
- Institute
of Nanomedicine
and Nanobiosensing, Ministry of Education Key Laboratory of Analysis
and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
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7
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A novel GMO biosensor for rapid ultrasensitive and simultaneous detection of multiple DNA components in GMO products. Biosens Bioelectron 2015; 66:431-7. [DOI: 10.1016/j.bios.2014.12.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/17/2014] [Accepted: 12/01/2014] [Indexed: 01/07/2023]
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8
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Li Y, Su N, Zheng B, Ruan J, Li Y, Luo C, Li Y. Detection of GM soybean by multiplex-touchdown PCR-microchip capillary electrophoresis with response surface methodology optimization. J Chromatogr Sci 2015; 53:345-52. [PMID: 24846281 DOI: 10.1093/chromsci/bmu033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The combination of the molecular technique, the multivariate strategy and microchip capillary electrophoresis (MCE) was applied to rapid and sensitive analysis of genetically modified (GM) soybean in food samples. A multiplex-touchdown polymerase chain reaction (PCR) system was developed for simultaneously amplifying three target sequences in Roundup Ready soybean (RRS). Response surface methodology was introduced to determine the optimal separation condition in MCE with good resolution and short analytical time. The detection of the PCR products of RRS was completed within 4 min under the optimal conditions. The specificity of the method was evaluated by testing non-GM soybean materials and three GM maize varieties (MON810, Bt176 and Bt11). A sensitivity of 0.1% GM organisms content was obtained, which was remarkably lower than the labeling threshold for transgenic food defined as 0.9% in the European regulation. The relative standard deviation of migration time was in the range of 0.17-0.95%. The proposed method was rapid, sensitive and specific and can be used to identify and detect GM soybean in food samples.
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Affiliation(s)
- Yongxin Li
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Ning Su
- Chinese Academy of Inspection and Quarantine Sciences, Gaobeidian North Road, Chaoyang District, Beijing 100025, People's Republic of China
| | - Bo Zheng
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Jia Ruan
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Yang Li
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Chunying Luo
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Yuanqian Li
- West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan 610041, People's Republic of China
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9
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Zhang F, Wang L, Wang R, Ying Y, Wu J. Simple Screening Strategy with Only Water Bath Needed for the Identification of Insect-Resistant Genetically Modified Rice. Anal Chem 2015; 87:1523-6. [DOI: 10.1021/ac504384p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fang Zhang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Liu Wang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Rui Wang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yibin Ying
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jian Wu
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
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10
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Surface enhanced electrochemiluminescence of Ru(bpy)3(2+). Sci Rep 2015; 5:7954. [PMID: 25608922 PMCID: PMC4302298 DOI: 10.1038/srep07954] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 12/24/2014] [Indexed: 01/16/2023] Open
Abstract
Surface enhanced spectroscopy such as surface enhanced Raman spectrum (SERS) and surface enhanced fluorescence have been investigated extensively in the past two decades. Herein, we present experimental evidence to demonstrate the existence of a new surface enhanced spectroscopy, namely, surface enhanced electrochemiluminescence (SEECL). Our investigation indicates that the electrochemiluminescence (ECL) response of the Ru(bpy)32+-tri-n-propylamine (TPrA) system could be significantly enhanced when the working electrode is modified with gold nanoparticle-SiO2 core-shell nanocomposites (AuNP@SiO2). It is worth noting that comparing with a working electrode modified with pure SiO2 nanoparticles, the electrochemical responses of the two electrodes were quite similar, but the ECL signal of the AuNP@SiO2 modified electrode was ~5 times higher than that of the SiO2 nanoparticles modified electrode. Thus we infer that the localized surface plasmon resonance (LSPR) of the AuNPs could be a major contribution to the ECL enhancement. Our investigations also demonstrate that the ECL enhancement is closely related to the thickness of the SiO2 layer. As much as 10 times ECL enhancement (comparing with the ECL intensity of bare electrode) is observed under the optimal conditions. The possible mechanism of the SEECL phenomenon is also discussed.
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11
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Characterization and study of transgenic cultivars by capillary and microchip electrophoresis. Int J Mol Sci 2014; 15:23851-77. [PMID: 25535077 PMCID: PMC4284794 DOI: 10.3390/ijms151223851] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 12/15/2014] [Accepted: 12/16/2014] [Indexed: 01/11/2023] Open
Abstract
Advances in biotechnology have increased the demand for suitable analytical techniques for the analysis of genetically modified organisms. Study of the substantial equivalence, discrimination between transgenic and non-transgenic cultivars, study of the unintended effects caused by a genetic modification or their response to diverse situations or stress conditions (e.g., environmental, climatic, infections) are some of the concerns that need to be addressed. Capillary electrophoresis (CE) is emerging as an alternative to conventional techniques for the study and characterization of genetically modified organisms. This article reviews the most recent applications of CE for the analysis and characterization of transgenic cultivars in the last five years. Different strategies have been described depending on the level analyzed (DNA, proteins or metabolites). Capillary gel electrophoresis (CGE) has shown to be particularly useful for the analysis of DNA fragments amplified by PCR. Metabolites and proteins have been mainly separated using capillary zone electrophoresis (CZE) using UV and MS detection. Electrophoretic chips have also proven their ability in the analysis of transgenic cultivars and a section describing the new applications is also included.
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Wu Y, Wang Y, Li J, Li W, Zhang L, Li Y, Li X, Li J, Zhu L, Wu G. Development of a general method for detection and quantification of the P35S promoter based on assessment of existing methods. Sci Rep 2014; 4:7358. [PMID: 25483893 PMCID: PMC4258656 DOI: 10.1038/srep07358] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 11/19/2014] [Indexed: 11/11/2022] Open
Abstract
The Cauliflower mosaic virus (CaMV) 35S promoter (P35S) is a commonly used target for detection of genetically modified organisms (GMOs). There are currently 24 reported detection methods, targeting different regions of the P35S promoter. Initial assessment revealed that due to the absence of primer binding sites in the P35S sequence, 19 of the 24 reported methods failed to detect P35S in MON88913 cotton, and the other two methods could only be applied to certain GMOs. The rest three reported methods were not suitable for measurement of P35S in some testing events, because SNPs in binding sites of the primer/probe would result in abnormal amplification plots and poor linear regression parameters. In this study, we discovered a conserved region in the P35S sequence through sequencing of P35S promoters from multiple transgenic events, and developed new qualitative and quantitative detection systems targeting this conserved region. The qualitative PCR could detect the P35S promoter in 23 unique GMO events with high specificity and sensitivity. The quantitative method was suitable for measurement of P35S promoter, exhibiting good agreement between the amount of template and Ct values for each testing event. This study provides a general P35S screening method, with greater coverage than existing methods.
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Affiliation(s)
- Yuhua Wu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Yulei Wang
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- College of Life Sciences, Hubei University, No. 368 Friendship Avenue, Wuhan 430062, People's Republic of China
| | - Jun Li
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Wei Li
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Li Zhang
- School of Life Science, South-Central University for Nationalities, Min-Yuan Road 708, Wuhan 430074, People's Republic of China
| | - Yunjing Li
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Xiaofei Li
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Jun Li
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Li Zhu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
| | - Gang Wu
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
- Supervision and Test Center (Wuhan) for Environmental Safety of Genetically Modified Plants, Ministry of Agriculture, No. 2 Xudong 2nd Road, Wuhan 430062, People's Republic of China
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He Y, Chai Y, Wang H, Bai L, Yuan R. A signal-on electrochemiluminescence aptasensor based on the quenching effect of manganese dioxide for sensitive detection of carcinoembryonic antigen. RSC Adv 2014. [DOI: 10.1039/c4ra11392f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Zhu X, Xu H, Zheng H, Yang G, Lin Z, Qiu B, Guo L, Chi Y, Chen G. An ultrasensitive aptameric sensor for proteins based on hyperbranched rolling circle amplification. Chem Commun (Camb) 2014; 49:10115-7. [PMID: 24045578 DOI: 10.1039/c3cc45521a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A novel fluorescent aptameric sensor for thrombin has been developed by combination of the high amplification efficiency of HRCA and the specific function of aptameric recognition.
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Affiliation(s)
- Xi Zhu
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
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15
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Shao N, Jiang SM, Zhang M, Wang J, Guo SJ, Li Y, Jiang HW, Liu CX, Zhang DB, Yang LT, Tao SC. MACRO: a combined microchip-PCR and microarray system for high-throughput monitoring of genetically modified organisms. Anal Chem 2014; 86:1269-76. [PMID: 24359455 DOI: 10.1021/ac403630a] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The monitoring of genetically modified organisms (GMOs) is a primary step of GMO regulation. However, there is presently a lack of effective and high-throughput methodologies for specifically and sensitively monitoring most of the commercialized GMOs. Herein, we developed a multiplex amplification on a chip with readout on an oligo microarray (MACRO) system specifically for convenient GMO monitoring. This system is composed of a microchip for multiplex amplification and an oligo microarray for the readout of multiple amplicons, containing a total of 91 targets (18 universal elements, 20 exogenous genes, 45 events, and 8 endogenous reference genes) that covers 97.1% of all GM events that have been commercialized up to 2012. We demonstrate that the specificity of MACRO is ~100%, with a limit of detection (LOD) that is suitable for real-world applications. Moreover, the results obtained of simulated complex samples and blind samples with MACRO were 100% consistent with expectations and the results of independently performed real-time PCRs, respectively. Thus, we believe MACRO is the first system that can be applied for effectively monitoring the majority of the commercialized GMOs in a single test.
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Affiliation(s)
- Ning Shao
- Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University , Shanghai 200240, China
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16
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Huang R, Ferhan AR, Guo L, Qiu B, Lin Z, Kim DH, Chen G. In situ synthesis of protein-resistant poly(oligo(ethylene glycol)methacrylate) films in capillary for protein separation. RSC Adv 2014. [DOI: 10.1039/c3ra47012a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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17
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Fu Z, Zhou X, Xing D. Sensitive colorimetric detection of Listeria monocytogenes based on isothermal gene amplification and unmodified gold nanoparticles. Methods 2013; 64:260-6. [DOI: 10.1016/j.ymeth.2013.08.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 07/26/2013] [Accepted: 08/05/2013] [Indexed: 12/31/2022] Open
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18
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Tefashe UM, Metera KL, Sleiman HF, Mauzeroll J. Electrogenerated chemiluminescence of iridium-containing ROMP block copolymer and self-assembled micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12866-12873. [PMID: 24047129 DOI: 10.1021/la402518v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The electrochemical properties and electrogenerated chemiluminescence (ECL) of an Ir(ppy)2(bpy)(+)-containing ROMP monomer, block copolymer (containing Ir(ppy)2(bpy)(+) complexes, PEG chains, and butyl moieties), and self-assembled micelles were investigated. Following polymerization of the iridium complex, we observed multiple oxidation peaks for the block copolymer in cyclic voltammograms (CV) and differential pulse voltammograms (DPV), suggesting the presence of multiple environments for the iridium complexes along the polymer backbone. The ECL signals from monomer 1 and polymer 2 were reproducible over continuous CV cycles and stable over prolonged potential biases, demonstrating their robustness toward ECL-based detection. Comparison of the ECL signal of the block copolymer, containing multiple iridium complexes attached to the backbone, and the monomeric complex showed enhanced signals for the polymer. In fact, formation and reopening of the self-assembled micelles allowed recovery of the polymer and near complete retention of its original ECL intensity.
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Affiliation(s)
- Ushula M Tefashe
- Laboratory for Electrochemical Reactive Imaging and Detection of Biological Systems, Department of Chemistry, McGill University , 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
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ZHANG ZX, ZHAO CZ. Progress of Photoelectrochemical Analysis and Sensors. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2013. [DOI: 10.1016/s1872-2040(13)60637-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Liu YM, Li J, Yang Y, Du JJ. Separation and determination of anesthetics by capillary electrophoresis with mixed micelles of sodium dodecyl sulfate and Tween 20 using electrochemiluminescence detection. LUMINESCENCE 2012; 28:673-8. [DOI: 10.1002/bio.2414] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 06/15/2012] [Accepted: 07/09/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Yan-Ming Liu
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang; 464000; People's Republic of China
| | - Jie Li
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang; 464000; People's Republic of China
| | - Yang Yang
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang; 464000; People's Republic of China
| | - Jun-Jun Du
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang; 464000; People's Republic of China
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Zhou X, Su Q, Xing D. An electrochemiluminescent assay for high sensitive detection of mercury (II) based on isothermal rolling circular amplification. Anal Chim Acta 2012; 713:45-9. [DOI: 10.1016/j.aca.2011.11.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 10/26/2011] [Accepted: 11/02/2011] [Indexed: 11/26/2022]
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Zhou X, Xing D. Amplified electrochemiluminescence detection of nucleic acids by hairpin probe-based isothermal amplification. Analyst 2012; 137:4188-92. [DOI: 10.1039/c2an35367a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Cheng L, Deng S, Lei J, Ju H. Disposable electrochemiluminescent biosensor using bidentate-chelated CdTe quantum dots as emitters for sensitive detection of glucose. Analyst 2011; 137:140-4. [PMID: 22034620 DOI: 10.1039/c1an15639j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel disposable solid-state electrochemiluminescent (ECL) biosensor was fabricated by immobilizing glucose oxidase and surface-unpassivated CdTe quantum dots (QDs) on a screen-printed carbon electrode (SPCE). The surface morphology of the biosensor was characterized with scanning electron microscopy and atomic force microscopy. With dissolved O(2) as an endogenous coreactant, QDs/SPCE showed strong ECL emission in pH 9.0 HCl-Tris buffer solution with low ECL peak potential at -0.89 V. The ECL intensity was twice that with hydrogen peroxide as coreactant at the same concentration. This phenomenon meant the ECL decreased upon consumption of dissolved O(2) and thus could be applied to the construction of oxidase-based ECL biosensors. With glucose oxidase as a model enzyme, the biosensor showed rapid response to glucose with a linear range of 0.8 to 100 μM and a detection limit of 0.3 μM. Further detection of glucose contained in human serum samples showed acceptable sensitivity and selectivity. This work provided a promising application of QDs in ECL-based disposable biosensors.
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Affiliation(s)
- Lingxiao Cheng
- State Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, 210093, PR China
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Capillary electrophoresis with electrochemiluminescence detection: fundamental theory, apparatus, and applications. Anal Bioanal Chem 2010; 399:3323-43. [DOI: 10.1007/s00216-010-4445-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 11/10/2010] [Accepted: 11/12/2010] [Indexed: 10/18/2022]
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Long Y, Zhou X, Xing D. Sensitive and isothermal electrochemiluminescence gene-sensing of Listeria monocytogenes with hyperbranching rolling circle amplification technology. Biosens Bioelectron 2010; 26:2897-904. [PMID: 21183330 DOI: 10.1016/j.bios.2010.11.034] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 11/12/2010] [Accepted: 11/23/2010] [Indexed: 10/18/2022]
Abstract
Listeria monocytogenes (L. monocytogenes) is one of the most problematic human pathogens, as it is mainly transmitted through the food chain and cause listeriosis. Thus, specific and sensitive detection of L. monocytogenes is required to ensure food safety. In this study, we proposed a method using hyperbranching rolling circle amplification (HRCA) combined with magnetic beads based electrochemiluminescence (ECL) to offer an isothermal, highly sensitive and specific assay for the detection of L. monocytogenes. At first, a linear padlock probe was designed to target a specific sequence in the hly gene which is specific to L. monocytogenes and then ligated by Taq DNA ligase. After ligation and digestion, further amplification by HRCA with a biotiny labeled primer and a tris (bipyridine) ruthenium (TBR) labeled primer was performed. The resulting HRCA products were then captured onto streptavidin-coated paramagnetic beads and were analyzed by magnetic beads based ECL platform to confirm the presence of targets. Through this approach, as low as 10 aM synthetic hly gene targets and about 0.0002 ng/μl of genomic DNA from L. monocytogenes can be detected, the ability to detect at such ultratrace levels could be attributed to the powerful amplification of HRCA and the high sensitivity of current magnetic bead based ECL detection platform.
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Affiliation(s)
- Yi Long
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
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Lara FJ, García-Campaña AM, Velasco AI. Advances and analytical applications in chemiluminescence coupled to capillary electrophoresis. Electrophoresis 2010; 31:1998-2027. [DOI: 10.1002/elps.201000031] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- Nicholas W. Frost
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Meng Jing
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Michael T. Bowser
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
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