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TaqMan Probes for Plant Species Identification and Quantification in Food and Feed Traceability. Methods Mol Biol 2023; 2638:301-314. [PMID: 36781651 DOI: 10.1007/978-1-0716-3024-2_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
In the last few years, the traceability and labeling of processed food and feeds have gained increasing importance due to the impact that mislabeling and product fraud may have on human/animal health or on the quality of final products, such as milk, cheese, and meat, as a consequence of animal dietary. The presence of contaminants or possible frauds due to the use of alternative plant materials in food and feeds can greatly impact the economy; therefore, they are becoming important targets for product certification by competent institutional services. This is especially relevant when complex matrixes are considered, in which the visual identification of the different components is quite difficult or even impossible. Despite the existence of mandatory traceability requirements for the analysis of feed/food composition addressed by European Community regulations, the labels do not always provide a sufficient guarantee about the ingredients and additive composition of those products. In this sense, the development of new methodologies that aim to assess the traceability of feed and food complex matrixes is crucial. In this chapter, a general protocol is presented for the establishment of quantitative real-time PCR-based techniques based on TaqMan assays applied to feed/food traceability, with a special focus on applications in the areas of food and feed security (e.g., for the detection of plant species involved in allergenic reactions), fraud detection (e.g., genetically modified organisms), and certification (e.g., protected denomination of origin).
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Increasing the Efficiency of Canola and Soybean GMO Detection and Quantification Using Multiplex Droplet Digital PCR. BIOLOGY 2022; 11:biology11020201. [PMID: 35205068 PMCID: PMC8869681 DOI: 10.3390/biology11020201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/24/2022] [Accepted: 01/24/2022] [Indexed: 12/11/2022]
Abstract
Simple Summary Digital PCR (dPCR) technology has been used for absolute quantification of genetically modified (GM) events. Duplex dPCR consisting of a target gene and a reference gene is mostly used for absolute quantification of GM events. We investigated the feasibility of absolute quantification of two, three, and four GM canola and soybean events at the same time using the QX200 Droplet Digital PCR (ddPCR) system. Adjustments of the probe concentrations and labels for some of the assays were needed for successful multiplex ddPCR. Absolute quantification of GM canola and soybean events was achieved for duplex, triplex, and tetraplex ddPCR at 0.1%, 1%, and 5% concentrations. Abstract The number of genetically modified (GM) events for canola, maize, and soybean has been steadily increasing. Real-time PCR is widely used for the detection and quantification of individual GM events. Digital PCR (dPCR) has also been used for absolute quantification of GM events. A duplex dPCR assay consisting of one reference gene and one GM event has been carried out in most cases. The detection of more than one GM event in a single assay will increase the efficiency of dPCR. The feasibility of detection and quantification of two, three, and four GM canola and soybean events at the same time was investigated at 0.1%, 1%, and 5% levels using the QX200 Droplet Digital PCR (ddPCR) system. The reference gene assay was carried out on the same plate but in different wells. For some of the assays, optimization of the probe concentrations and labels was needed for successful ddPCR. Results close to the expected result were achieved for duplex, triplex, and tetraplex ddPCR assays for GM canola events. Similar ddPCR results were also achieved for some GM soybean events with some exceptions. Overall, absolute quantification of up to four GM events at the same time improves the efficiency of GM detection.
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What is the role of the nitrate reductase (euknr) gene in fungi that live in nitrate-free environments? A targeted gene knock-out study in Ampelomyces mycoparasites. Fungal Biol 2021; 125:905-913. [PMID: 34649677 DOI: 10.1016/j.funbio.2021.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/22/2021] [Accepted: 06/10/2021] [Indexed: 11/24/2022]
Abstract
Mycoparasitic fungi can be utilized as biocontrol agents (BCAs) of many plant pathogens. Deciphering the molecular mechanisms of mycoparasitism may improve biocontrol efficiency. This work reports the first functional genetic studies in Ampelomyces, widespread mycoparasites and BCAs of powdery mildew fungi, and a molecular genetic toolbox for future works. The nitrate reductase (euknr) gene was targeted to reveal the biological function of nitrate assimilation in Ampelomyces. These mycoparasites live in an apparently nitrate-free environment, i.e. inside the hyphae of powdery mildew fungi that lack any nitrate uptake and assimilation system. Homologous recombination-based gene knock-out (KO) was applied to eliminate the euknr gene using Agrobacterium tumefaciens-mediated transformation. Efficient KO of euknr was confirmed by PCR, and visible phenotype caused by loss of euknr was detected on media with different nitrogen sources. Mycoparasitic ability was not affected by knocking out euknr as a tested transformant readily parasitized Blumeria graminis and Podosphaera xanthii colonies on barley and cucumber, respectively, and the rate of mycoparasitism did not differ from the wild type. These results indicate that euknr is not involved in mycoparasitism. Dissimilatory processes, involvement in nitric oxide metabolism, or other, yet undiscovered processes may explain why a functional euknr is maintained in Ampelomyces.
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Development and assessment of a duplex droplet digital PCR method for quantification of GM rice Kemingdao. Anal Bioanal Chem 2021; 413:4341-4351. [PMID: 34023912 DOI: 10.1007/s00216-021-03390-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/26/2021] [Accepted: 05/03/2021] [Indexed: 10/21/2022]
Abstract
The implementation of genetically modified organism (GMO) labeling policies requires accurate quantitative methods to measure the GMO content in test samples. A Kemingdao/phospholipase D (KMD/PLD) duplex ddPCR method was established with rice genomic DNA (gDNA) of homozygous KMD as template by optimizing the annealing temperature and cycle number. Duplex ddPCR showed a linear response over the dynamic range from 68 to 175,000 copies, covering four orders of magnitude. The limit of detection (LOD) and limit of quantification (LOQ) for duplex ddPCR were determined to be 9 copies and 34 copies of the rice haploid genome, respectively. A very high dilution factor would result in unacceptable bias and coefficients of variation for determining copy number of the gDNA solution, and more than 1000 copies of the DNA template in one reaction is preferred to obtain accurate quantitative results by duplex PCR. Five blinded DNA samples with copy number ratio of 10%, 5%, 1%, 0.1%, and 0.05%, and three blinded real-life matrix samples with mass fraction of 5%, 1%, and 0.5% were quantified by duplex ddPCR, simplex ddPCR, and qPCR. These three methods all gave comparable GMO content and copy numbers within the required precision, but the duplex ddPCR showed the narrowest uncertainty interval and provided the highest precision in comparison to simplex ddPCR and qPCR. The ddPCR is a more appealing and reliable technology for the accurate quantification of GMO content than simplex ddPCR and qPCR considering the uncertainty and precision of quantitative results, the time consumption of generating droplets, and the cost of ddPCR reagents.
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Yang L, Chen Y, Li R, Xu W, Cui J, Zhang D, Zhang X. Universal LNA Probe-Mediated Multiplex Droplet Digital Polymerase Chain Reaction for Ultrasensitive and Accurate Quantitative Analysis of Genetically Modified Organisms. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:1705-1713. [PMID: 33528262 DOI: 10.1021/acs.jafc.0c06433] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Multiplex and high-throughput assays are becoming the main trends in the development of new nucleic acid detection and quantification methods, such as those for genetically modified organism (GMO) analysis. Here, we report a novel universal LNA probe-mediated droplet digital polymerase chain reaction (PCR) method (ULNA-ddPCR) for multiple DNA target quantification in GMOs. In ULNA-ddPCR, only one universal LNA probe is used for multiple DNA targets instead of using one to one TaqMan probe. The specificity, sensitivity, dynamic range, and accuracy of the ULNA-ddPCR method are determined by employing GM rice analysis as an example. Simplex and triplex ULNA-ddPCR assays for three GM rice events, T2A-1, T1C-19, and G6H1, are established and evaluated. All results indicate that the developed simplex and triplex ULNA-ddPCR assays are suitable for quantitative analysis of GM rice events with high sensitivity, accuracy, and low cost. The ULNA-ddPCR method also has the potential for multiple DNA target quantification in other research fields.
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Affiliation(s)
- Litao Yang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, Henan 455000, China
| | - Yi Chen
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Rong Li
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wenting Xu
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jinjie Cui
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang, Henan 455000, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiujie Zhang
- Development Center of Science and Technology, Ministry of Agriculture of People's Republic of China, Beijing 100025, China
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Fu W, Wang C, Zhu P, Xu W, Li X, Zhu S. A universal analytical approach for screening and monitoring of authorized and unauthorized GMOs. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109176] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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7
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Verginelli D, Paternò A, De Marchis ML, Quarchioni C, Vinciguerra D, Bonini P, Peddis S, Fusco C, Misto M, Marfoglia C, Pomilio F, Marchesi U. Development and comparative study of a pat/bar real-time PCR assay for integrating the screening strategy of a GMO testing laboratory. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:2121-2129. [PMID: 31875962 PMCID: PMC7384061 DOI: 10.1002/jsfa.10235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 10/21/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND The number and variety of genetically modified organisms (GMOs) used globally for the production of food and feed, and potentially circulating in the European Union (EU), is constantly increasing. This implies an additional effort for the EU enforcement laboratories to optimize available resources, to contain costs and time. A well established approach for streamlining the analytical workflow is the introduction of a screening step, typically based on a smart set of real-time polymerase chain reaction (PCR) screening methods. The multiplexing strategy, allowing the detection of several screening elements simultaneously, is a further optimization of this step. RESULTS In this study, we present the validation of a real-time PCR duplex assay for the pat and bar screening elements to be easily incorporated in the GMO diagnostic routine. We also provide a comparison between this method and the related singleplex and pre-spotted assays. CONCLUSION Our results fully respect all the validation parameters suggested by the Minimum Performance Criteria of the European Network of GMO Laboratories. Furthermore, the duplex assay is equivalent in terms of performance compared to the other two methods, but it shows a higher overall flexibility and cost effectiveness. © 2019 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Daniela Verginelli
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Annalisa Paternò
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Maria Laura De Marchis
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Cinzia Quarchioni
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Daniela Vinciguerra
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Pamela Bonini
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Stefania Peddis
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Cristiana Fusco
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Marisa Misto
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
| | - Cristina Marfoglia
- Igiene delle tecnologie alimentari e dellʼalimentazione animaleIstituto Zooprofilattico Sperimentale dellʼAbruzzo e Molise "G. Caporale"TeramoItaly
| | - Francesco Pomilio
- Igiene delle tecnologie alimentari e dellʼalimentazione animaleIstituto Zooprofilattico Sperimentale dellʼAbruzzo e Molise "G. Caporale"TeramoItaly
| | - Ugo Marchesi
- National Reference Laboratory for GM Food and Feed, GMO UnitIstituto Zooprofilattico Sperimentale del Lazio e della Toscana “Mariano Aleandri”RomeItaly
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Devi S, Chu PY, Wu BH, Ho YP. Mass spectrometry combined with affinity probes for the identification of CP4 EPSPS in genetically modified soybeans. JOURNAL OF MASS SPECTROMETRY : JMS 2020; 55:e4371. [PMID: 31077490 DOI: 10.1002/jms.4371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/12/2019] [Accepted: 05/04/2019] [Indexed: 06/09/2023]
Abstract
Sample preparation methods used for genetically modified organisms (GMOs) analysis are often time consuming, require extensive manual manipulation, and result in limited amounts of purified protein, which may complicate the detection of low-abundance GM protein. A robust sample pretreatment method prior to mass spectrometry (MS) detection of the transgenic protein (5-enolpyruvylshikimate-3-phosphate synthase [CP4 EPSPS]) present in Roundup Ready soya is investigated. Liquid chromatography-multiple reaction monitoring tandem MS (nano LC-MS/MS-MRM) was used for the detection and quantification of CP4 EPSPS. Gold nanoparticles (AuNPs) and concanavalin A (Con A)-immobilized Sepharose 4B were used as selective probes for the separation of the major storage proteins in soybeans. AuNPs that enable the capture of cysteine-containing proteins were used to reduce the complexity of the crude extract of GM soya. Con A-sepharose was used for the affinity capture of β-conglycinin and other glycoproteins of soya prior to enzymatic digestion. The methods enabled the detection of unique peptides of CP4 EPSPS at a level as low as 0.5% of GM soya in MRM mode. Stable-isotope dimethyl labeling was further applied to the quantification of GM soya. Both probes exhibited high selectivity and efficiency for the affinity capture of storage proteins, leading to the quantitative detection at 0.5% GM soya, which is a level below the current European Union's threshold for food labeling. The square correlation coefficients were greater than 0.99. The approach for sample preparation is very simple without the need for time-consuming protein prefractionation or separation procedures and thus presents a significant improvement over existing methods for the analysis of the GM soya protein.
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Affiliation(s)
- Shobha Devi
- Department of Chemistry, Rajiv Gandhi University of Knowledge Technologies, Hyderabad, India
| | - Pei-Yu Chu
- Department of Chemistry, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Bo-Hung Wu
- Department of Chemistry, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Yen-Peng Ho
- Department of Chemistry, National Dong Hwa University, Hualien, 97401, Taiwan
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Bak A, Emerson JB. Multiplex quantitative PCR for single-reaction genetically modified (GM) plant detection and identification of false-positive GM plants linked to Cauliflower mosaic virus (CaMV) infection. BMC Biotechnol 2019; 19:73. [PMID: 31699075 PMCID: PMC6836441 DOI: 10.1186/s12896-019-0571-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 10/15/2019] [Indexed: 01/05/2023] Open
Abstract
Background Most genetically modified (GM) plants contain a promoter, P35S, from the plant virus, Cauliflower mosaic virus (CaMV), and many have a terminator, TNOS, derived from the bacterium, Agrobacterium tumefaciens. Assays designed to detect GM plants often target the P35S and/or TNOS DNA sequences. However, because the P35S promoter is derived from CaMV, these detection assays can yield false-positives from non-GM plants infected by this naturally-occurring virus. Results Here we report the development of an assay designed to distinguish CaMV-infected plants from GM plants in a single multiplexed quantitative PCR (qPCR) reaction. Following initial testing and optimization via PCR and singleplex-to-multiplex qPCR on both plasmid and plant DNA, TaqMan qPCR probes with different fluorescence wavelengths were designed to target actin (a positive-control plant gene), P35S, P3 (a CaMV-specific gene), and TNOS. We tested the specificity of our quadruplex qPCR assay using different DNA extracts from organic watercress and both organic and GM canola, all with and without CaMV infection, and by using commercial and industrial samples. The limit of detection (LOD) of each target was determined to be 1% for actin, 0.001% for P35S, and 0.01% for both P3 and TNOS. Conclusions This assay was able to distinguish CaMV-infected plants from GM plants in a single multiplexed qPCR reaction for all samples tested in this study, suggesting that this protocol is broadly applicable and readily transferrable to any interested parties with a qPCR platform.
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Affiliation(s)
- Aurélie Bak
- Department of Plant Pathology, University of California, Davis, CA, 95616, USA
| | - Joanne B Emerson
- Department of Plant Pathology, University of California, Davis, CA, 95616, USA.
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Cottenet G, Blancpain C, Chuah PF. Performance assessment of digital PCR for the quantification of GM-maize and GM-soya events. Anal Bioanal Chem 2019; 411:2461-2469. [PMID: 30810790 DOI: 10.1007/s00216-019-01692-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/28/2019] [Accepted: 02/13/2019] [Indexed: 11/25/2022]
Abstract
Accurate quantitative methods are needed to determine the amount of transgenic material in ingredients and comply with labelling GMO thresholds. Quantitative real-time PCR methods are usually applied for GMO quantification, but since a few years, digital PCR (dPCR) has been described as a potential alternative by quantifying DNA molecules directly without any standard curves. In this study, the performance of dPCR to quantify 9 GM-soya events and 15 GM-maize events was assessed. Following GMO validation guidelines, the trueness and precision were determined on high, medium and low levels of transgenic content. Results showed biases below ± 25% and satisfactory precision data. Limits of quantification were determined for each GM-event and were between 12 and 31 target copies. The reliability of GMO quantification by dPCR was further confirmed by analysing several proficiency test samples. Overall, dPCR showed accurate and precise GMO quantification on all the tested GM-events, from high to low transgenic amount. With its ease-of-use, dPCR was found to be an appealing alternative technology for routine GMO testing laboratories. Graphical abstract.
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Affiliation(s)
- Geoffrey Cottenet
- Institute of Food Safety & Analytical Sciences - Nestlé Research, Vers-chez-les-Blanc, 1000, Lausanne 26, Switzerland.
| | - Carine Blancpain
- Institute of Food Safety & Analytical Sciences - Nestlé Research, Vers-chez-les-Blanc, 1000, Lausanne 26, Switzerland
| | - Poh Fong Chuah
- Nestlé Quality Assurance Center, 29 Quality Road, Singapore, 618802, Singapore
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Cottenet G, Blancpain C, Sonnard V, Chuah PF. Two FAST multiplex real-time PCR reactions to assess the presence of genetically modified organisms in food. Food Chem 2019; 274:760-765. [DOI: 10.1016/j.foodchem.2018.09.050] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 08/31/2018] [Accepted: 09/09/2018] [Indexed: 11/25/2022]
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12
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Liu W, Wang X, Tao J, Xi B, Xue M, Sun W. A Multiplex PCR Assay Mediated by Universal Primers for the Detection of Adulterated Meat in Mutton. J Food Prot 2019; 82:325-330. [PMID: 30688538 DOI: 10.4315/0362-028x.jfp-18-302] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This study aimed to establish a multiplex PCR detection system mediated by "universal primers," which would be able to determine whether mutton meat contained nonmutton ingredients from rats, foxes, and ducks. Based on the sequence variation of specific mitochondrial genes, nine different multiplex PCR primers were designed, and four kinds of meat products were rapidly identified by electrophoresis using an optimized multiplex PCR system based on the molecular weight differences of the amplified products. Multiplex PCR applications optimized for meat food source from food samples for testing was used to verify the accuracy of the identification method. The results showed that the primers in multiple PCR system mediated by universal primers could be used for the rapid identification of rat, fox, duck, and sheep meat in mutton products, and the detection sensitivity could reach 0.05 ng/μL. The identification of food samples validated the practical value of this method. Therefore, a multiplex PCR system mediated by universal primers was established, which can be used to quickly identify the origin of animal ingredients from rats, foxes, and ducks in mutton products.
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Affiliation(s)
- Wanwan Liu
- 1 Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, People's Republic of China
| | - Xiaonan Wang
- 1 Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, People's Republic of China
| | - Jing Tao
- 1 Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, People's Republic of China
| | - Bangsheng Xi
- 1 Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, People's Republic of China
| | - Man Xue
- 2 Suzhou Institute for Food Control, Suzhou, Jiangsu, People's Republic of China
| | - Wanping Sun
- 1 Laboratory of Molecular Diagnostics, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, People's Republic of China
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Novel TaqMan PCR screening methods for element cry3A and construct gat/T-pinII to support detection of both known and unknown GMOs. Eur Food Res Technol 2017. [DOI: 10.1007/s00217-016-2761-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Fu W, Wei S, Wang C, Du Z, Zhu P, Wu X, Wu G, Zhu S. A temperature-tolerant multiplex elements and genes screening system for genetically modified organisms based on dual priming oligonucleotide primers and capillary electrophoresis. Food Chem 2017; 229:396-402. [PMID: 28372191 DOI: 10.1016/j.foodchem.2017.02.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 11/17/2016] [Accepted: 02/17/2017] [Indexed: 01/22/2023]
Abstract
High throughput screening systems are the preferred solution to meet the urgent requirement of increasing number of genetically modified organisms (GMOs). In this study, we have successfully developed a multiplex GMO element screening system with dual priming oligonucleotide (DPO) primers. This system can detect the cauliflower mosaic virus 35S (CaMV 35S), terminator of nopaline synthase gene (NOS), figwort mosaic virus 35S (FMV 35S) promoter, neomycin phosphotransferaseII (NPTII), Bt Cry 1Ab, phosphinothricin acetyltransferase genes (bar) and Streptomyces viridochromogenes (pat) simultaneously, which covers more than 90% of all authorized GMO species worldwide. This system exhibits a high tolerance to annealing temperatures, high specificity and a limit of detection equal to conventional PCR. A total of 214 samples from markets, national entry-exit agencies, the Institute for Reference Materials and Measurement (IRMM) and the American Oil Chemists' Society (AOCS) were also tested for applicability. This screening system is therefore suitable for GMO screening.
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Affiliation(s)
- Wei Fu
- Institute of Plant Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Shuang Wei
- Shantou Entry-exit Inspection and Quarantine Bureau, Shantou 515041, China
| | - Chenguang Wang
- Institute of Plant Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China; College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Zhixin Du
- Guangxi Entry-exit Inspection and Quarantine Bureau, Nanning 530028, China
| | - Pengyu Zhu
- Institute of Plant Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Xiyang Wu
- Department of Food Science and Engineering, College of Science and Technology, Jinan University, Guangzhou 510632, 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.
| | - Shuifang Zhu
- Institute of Plant Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100176, China.
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Çakir Ö, Meriç S, Meriç S, Ari Ş. GMO Analysis Methods for Food: From Today to Tomorrow. Food Saf (Tokyo) 2016. [DOI: 10.1002/9781119160588.ch5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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16
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Demeke T, Holigroski M, Eng M, Xing J. Absolute quantification of genetically engineered traits with droplet digital PCR: Effect of DNA treatments and spiking with non-target DNA. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Cottenet G, Sonnard V, Blancpain C, Ho HZ, Leong HL, Chuah PF. A DNA macro-array to simultaneously identify 32 meat species in food samples. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.02.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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18
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Peng C, Wang P, Xu X, Wang X, Wei W, Chen X, Xu J. Development of a qualitative real-time PCR method to detect 19 targets for identification of genetically modified organisms. SPRINGERPLUS 2016; 5:889. [PMID: 27386337 PMCID: PMC4920734 DOI: 10.1186/s40064-016-2395-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 05/24/2016] [Indexed: 11/12/2022]
Abstract
As the amount of commercially available genetically modified organisms (GMOs) grows recent years, the diversity of target sequences for molecular detection techniques are eagerly needed. Considered as the gold standard for GMO analysis, the real-time PCR technology was optimized to produce a high-throughput GMO screening method. With this method we can detect 19 transgenic targets. The specificity of the assays was demonstrated to be 100 % by the specific amplification of DNA derived from reference material from 20 genetically modified crops and 4 non modified crops. Furthermore, most assays showed a very sensitive detection, reaching the limit of ten copies. The 19 assays are the most frequently used genetic elements present in GM crops and theoretically enable the screening of the known GMO described in Chinese markets. Easy to use, fast and cost efficient, this method approach fits the purpose of GMO testing laboratories.
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Affiliation(s)
- Cheng Peng
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
| | - Pengfei Wang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058 China
| | - Xiaoli Xu
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
| | - Xiaofu Wang
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
| | - Wei Wei
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
| | - Xiaoyun Chen
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
| | - Junfeng Xu
- Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 China ; State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou, 310021 China
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19
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Rosa SF, Gatto F, Angers-Loustau A, Petrillo M, Kreysa J, Querci M. Development and applicability of a ready-to-use PCR system for GMO screening. Food Chem 2016; 201:110-9. [DOI: 10.1016/j.foodchem.2016.01.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 11/09/2015] [Accepted: 01/03/2016] [Indexed: 11/26/2022]
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20
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Turkec A, Lucas SJ, Karacanli B, Baykut A, Yuksel H. Assessment of a direct hybridization microarray strategy for comprehensive monitoring of genetically modified organisms (GMOs). Food Chem 2016; 194:399-409. [PMID: 26471572 DOI: 10.1016/j.foodchem.2015.08.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 07/22/2015] [Accepted: 08/10/2015] [Indexed: 11/16/2022]
Abstract
Detection of GMO material in crop and food samples is the primary step in GMO monitoring and regulation, with the increasing number of GM events in the world market requiring detection solutions with high multiplexing capacity. In this study, we test the suitability of a high-density oligonucleotide microarray platform for direct, quantitative detection of GMOs found in the Turkish feed market. We tested 1830 different 60nt probes designed to cover the GM cassettes from 12 different GM cultivars (3 soya, 9 maize), as well as plant species-specific and contamination controls, and developed a data analysis method aiming to provide maximum throughput and sensitivity. The system was able specifically to identify each cultivar, and in 10/12 cases was sensitive enough to detect GMO DNA at concentrations of ⩽1%. These GMOs could also be quantified using the microarray, as their fluorescence signals increased linearly with GMO concentration.
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Affiliation(s)
- Aydin Turkec
- Uludag University Plant and Animal Production Department, Mustafa Kemalpasa Vocational School, 16500 Bursa, Turkey.
| | - Stuart J Lucas
- Sabanci University Nanotechnology Research and Application Centre, Sabanci University, Orhanli, 34956 Tuzla, Istanbul, Turkey.
| | - Burçin Karacanli
- Elips Health Products Ltd., Ataturk mh. Namık Kemal Cd no: 17, Tan Plaza, Atasehir, Istanbul, Turkey
| | - Aykut Baykut
- Elips Health Products Ltd., Ataturk mh. Namık Kemal Cd no: 17, Tan Plaza, Atasehir, Istanbul, Turkey
| | - Hakki Yuksel
- Elips Health Products Ltd., Ataturk mh. Namık Kemal Cd no: 17, Tan Plaza, Atasehir, Istanbul, Turkey
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21
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Fang X, Zhang C. Detection of adulterated murine components in meat products by TaqMan© real-time PCR. Food Chem 2016; 192:485-90. [DOI: 10.1016/j.foodchem.2015.07.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 03/16/2015] [Accepted: 07/07/2015] [Indexed: 11/28/2022]
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22
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Fraiture MA, Herman P, Taverniers I, De Loose M, Deforce D, Roosens NH. Current and new approaches in GMO detection: challenges and solutions. BIOMED RESEARCH INTERNATIONAL 2015; 2015:392872. [PMID: 26550567 PMCID: PMC4624882 DOI: 10.1155/2015/392872] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 09/07/2015] [Indexed: 11/17/2022]
Abstract
In many countries, genetically modified organisms (GMO) legislations have been established in order to guarantee the traceability of food/feed products on the market and to protect the consumer freedom of choice. Therefore, several GMO detection strategies, mainly based on DNA, have been developed to implement these legislations. Due to its numerous advantages, the quantitative PCR (qPCR) is the method of choice for the enforcement laboratories in GMO routine analysis. However, given the increasing number and diversity of GMO developed and put on the market around the world, some technical hurdles could be encountered with the qPCR technology, mainly owing to its inherent properties. To address these challenges, alternative GMO detection methods have been developed, allowing faster detections of single GM target (e.g., loop-mediated isothermal amplification), simultaneous detections of multiple GM targets (e.g., PCR capillary gel electrophoresis, microarray, and Luminex), more accurate quantification of GM targets (e.g., digital PCR), or characterization of partially known (e.g., DNA walking and Next Generation Sequencing (NGS)) or unknown (e.g., NGS) GMO. The benefits and drawbacks of these methods are discussed in this review.
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Affiliation(s)
- Marie-Alice Fraiture
- Platform of Biotechnology and Molecular Biology (PBB) and Biosafety and Biotechnology Unit (SBB), Scientific Institute of Public Health (WIV-ISP), J. Wytsmanstraat 14, 1050 Brussels, Belgium
- Technology and Food Sciences Unit, Institute for Agricultural and Fisheries Research (ILVO), Burg. Van Gansberghelaan 115, Bus 1, 9820 Merelbeke, Belgium
- Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Philippe Herman
- Platform of Biotechnology and Molecular Biology (PBB) and Biosafety and Biotechnology Unit (SBB), Scientific Institute of Public Health (WIV-ISP), J. Wytsmanstraat 14, 1050 Brussels, Belgium
| | - Isabel Taverniers
- Technology and Food Sciences Unit, Institute for Agricultural and Fisheries Research (ILVO), Burg. Van Gansberghelaan 115, Bus 1, 9820 Merelbeke, Belgium
| | - Marc De Loose
- Technology and Food Sciences Unit, Institute for Agricultural and Fisheries Research (ILVO), Burg. Van Gansberghelaan 115, Bus 1, 9820 Merelbeke, Belgium
- Department of Plant Biotechnology and Bioinformatics, Faculty of Sciences, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
| | - Dieter Deforce
- Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Nancy H. Roosens
- Platform of Biotechnology and Molecular Biology (PBB) and Biosafety and Biotechnology Unit (SBB), Scientific Institute of Public Health (WIV-ISP), J. Wytsmanstraat 14, 1050 Brussels, Belgium
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23
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Bhoge RK, Chhabra R, Randhawa G, Sathiyabama M, Singh M. Event-specific analytical methods for six genetically modified maize events using visual and real-time loop-mediated isothermal amplification. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.02.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Development and validation of a 48-target analytical method for high-throughput monitoring of genetically modified organisms. Sci Rep 2015; 5:7616. [PMID: 25556930 PMCID: PMC5154595 DOI: 10.1038/srep07616] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 12/03/2014] [Indexed: 12/12/2022] Open
Abstract
The rapid increase in the number of genetically modified (GM) varieties has led to a demand for high-throughput methods to detect genetically modified organisms (GMOs). We describe a new dynamic array-based high throughput method to simultaneously detect 48 targets in 48 samples on a Fludigm system. The test targets included species-specific genes, common screening elements, most of the Chinese-approved GM events, and several unapproved events. The 48 TaqMan assays successfully amplified products from both single-event samples and complex samples with a GMO DNA amount of 0.05 ng, and displayed high specificity. To improve the sensitivity of detection, a preamplification step for 48 pooled targets was added to enrich the amount of template before performing dynamic chip assays. This dynamic chip-based method allowed the synchronous high-throughput detection of multiple targets in multiple samples. Thus, it represents an efficient, qualitative method for GMO multi-detection.
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25
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Tortajada-Genaro LA, Santiago-Felipe S, Amasia M, Russom A, Maquieira Á. Isothermal solid-phase recombinase polymerase amplification on microfluidic digital versatile discs (DVDs). RSC Adv 2015. [DOI: 10.1039/c5ra02778k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The proposed device, for massive DNA-based screening in limited-resource settings, comprises a centrifugal platform to perform isothermal solid-phase amplification in microarray format and a digital versatile disc drive to read the results.
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Affiliation(s)
- Luis A. Tortajada-Genaro
- Departamento de Química
- Instituto Interunversitario de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Universidad Politécnica de Valencia
- Spain
| | - Sara Santiago-Felipe
- Departamento de Química
- Instituto Interunversitario de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Universidad Politécnica de Valencia
- Spain
| | - Mary Amasia
- Div. of Nanobiotechnology
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Aman Russom
- Div. of Nanobiotechnology
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Ángel Maquieira
- Departamento de Química
- Instituto Interunversitario de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Universidad Politécnica de Valencia
- Spain
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26
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Milavec M, Dobnik D, Yang L, Zhang D, Gruden K, Zel J. GMO quantification: valuable experience and insights for the future. Anal Bioanal Chem 2014; 406:6485-97. [PMID: 25182968 DOI: 10.1007/s00216-014-8077-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/23/2014] [Accepted: 07/28/2014] [Indexed: 11/30/2022]
Abstract
Cultivation and marketing of genetically modified organisms (GMOs) have been unevenly adopted worldwide. To facilitate international trade and to provide information to consumers, labelling requirements have been set up in many countries. Quantitative real-time polymerase chain reaction (qPCR) is currently the method of choice for detection, identification and quantification of GMOs. This has been critically assessed and the requirements for the method performance have been set. Nevertheless, there are challenges that should still be highlighted, such as measuring the quantity and quality of DNA, and determining the qPCR efficiency, possible sequence mismatches, characteristics of taxon-specific genes and appropriate units of measurement, as these remain potential sources of measurement uncertainty. To overcome these problems and to cope with the continuous increase in the number and variety of GMOs, new approaches are needed. Statistical strategies of quantification have already been proposed and expanded with the development of digital PCR. The first attempts have been made to use new generation sequencing also for quantitative purposes, although accurate quantification of the contents of GMOs using this technology is still a challenge for the future, and especially for mixed samples. New approaches are needed also for the quantification of stacks, and for potential quantification of organisms produced by new plant breeding techniques.
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Affiliation(s)
- Mojca Milavec
- Department of Biotechnology and Systems Biology, National Institute of Biology (NIB), Večna pot 111, 1000, Ljubljana, Slovenia,
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27
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Randhawa GJ, Singh M, Sood P, Bhoge RK. Multitarget real-time PCR-based system: monitoring for unauthorized genetically modified events in India. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:7118-7130. [PMID: 24971889 DOI: 10.1021/jf502190e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A multitarget TaqMan real-time PCR (RTi-PCR) based system was developed to monitor unauthorized genetically modified (GM) events in India. Most of the GM events included in this study are either authorized for commercial cultivation or field trials, which were indigenously developed or imported for research purposes. The developed system consists of a 96-well prespotted plate with lyophilized primers and probes, for simultaneous detection of 47 targets in duplicate, including 21 event-specific sequences, 5 construct regions, 15 for transgenic elements, and 6 taxon-specific targets for cotton, eggplant, maize, potato, rice, and soybean. Limit of detection (LOD) of assays ranged from 0.1 to 0.01% GM content for different targets. Applicability, robustness, and practical utility of the developed system were verified with stacked GM cotton event, powdered samples of proficiency testing and two unknown test samples. This user-friendly multitarget approach can be efficiently utilized for monitoring the unauthorized GM events in an Indian context.
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Affiliation(s)
- Gurinder Jit Randhawa
- Division of Genomic Resources, National Bureau of Plant Genetic Resources, New Delhi 110 012, India
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28
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Barbau-Piednoir E, Stragier P, Roosens N, Mazzara M, Savini C, Van den Eede G, Van den Bulcke M. Inter-laboratory Testing of GMO Detection by Combinatory SYBR®Green PCR Screening (CoSYPS). FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9837-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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29
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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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