1
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Park JE, Lee DG, Kim HR, Kim MJ, Kim HY, Kim HJ. Development of ultrafast PCR assays for the event-specific detection of eleven approved genetically modified canola events in South Korea. Food Chem 2022; 373:131419. [PMID: 34717087 DOI: 10.1016/j.foodchem.2021.131419] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/09/2021] [Accepted: 10/14/2021] [Indexed: 11/16/2022]
Abstract
In Korea, genetically modified (GM) canola events derived from eleven single events have been authorized for food and feed, but not for cultivation. Therefore, the development of a rapid and accurate on-site detection method is crucial for the management of these approved GM canola events. In this study, ultrafast polymerase chain reaction (PCR) assays for the event-specific detection of eleven GM canola events were developed. The limit of detection (LOD) on DNA-based and powder-based GM canola samples of each primer set using the ultrafast PCR ranged from 0.1% to 0.01%, while the quantitative analysis of these ultrafast PCR assays, indicated that the correlation coefficient (R2) ranged from 0.98 to 0.9903. These results indicate that the developed assays may have sufficient specificity and LOD capacity to detect the eleven specific GM canola events for the attendant management and monitoring, thus preventing GM canola from contaminating the natural environment.
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Affiliation(s)
- Ji-Eun Park
- Institute of Life Sciences & Resources and Department of Food Science & Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Do-Geun Lee
- Institute of Life Sciences & Resources and Department of Food Science & Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hong-Rae Kim
- Institute of Life Sciences & Resources and Department of Food Science & Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Mi-Ju Kim
- Institute of Life Sciences & Resources and Department of Food Science & Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hae-Yeong Kim
- Institute of Life Sciences & Resources and Department of Food Science & Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.
| | - Hyun-Joong Kim
- Department of Food Engineering, Mokpo National University, Muan 58554, Republic of Korea.
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2
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Shin MK, Jeon SM, Koo YE. Development of a rapid detection method for genetically modified rice using the ultra-fast PCR system. Food Sci Biotechnol 2022; 31:175-182. [PMID: 35095287 PMCID: PMC8783574 DOI: 10.1007/s10068-021-01025-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 10/05/2021] [Accepted: 12/15/2021] [Indexed: 12/05/2022] Open
Abstract
Genetically modified (GM) rice varieties containing traits such as tolerance to abiotic stress and resistance against pests and diseases continue to be developed. However, contamination incidents from unauthorized GM rice varieties have been encountered. To date, no GM rice crop has been authorized for consumption and/or commercialization in Korea. Therefore, to enhance safety management of unauthorized genetically modified organisms (GMOs), accurate and reliable detection methods are needed to identify GMOs in crops or products. In this study, we developed rapid detection methods for GM rice events (Bt63, KMD1, Kefeng6, Kefeng8, and LLRice62) using ultra-fast PCR system. Ultra-fast PCR is a state-of-the-art technology and decreases PCR run-times dramatically. However, the ultra-fast PCR is not widely used in GMO analysis. Thus, we designed a detection method for five events of GM rice and confirmed them by performing specificity, sensitivity, and applicability assays. All results demonstrate that the ultra-fast PCR system is a specific, sensitive, and reliable method to identify and monitor GM rice events. Additionally, it can be utilized as a rapid and simple method for GMO analysis in crops or processed products. This study can be used as a reference for future research on new analysis methods of unauthorized GMOs.
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Affiliation(s)
- Min Ki Shin
- Food Safety Risk Assessment Department, National Institute of Food and Drug Safety Evaluation, Cheongju, 28159 Republic of Korea
- Interdisciplinary Program in Biological and Chemical Engineering, Seoul National University, Seoul, 08826 Republic of Korea
| | - Seon Min Jeon
- Food Safety Risk Assessment Department, National Institute of Food and Drug Safety Evaluation, Cheongju, 28159 Republic of Korea
| | - Yong Eui Koo
- Food Safety Risk Assessment Department, National Institute of Food and Drug Safety Evaluation, Cheongju, 28159 Republic of Korea
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3
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Li J, Li L, Zhang L, Zhang X, Li X, Zhai S, Gao H, Li Y, Wu G, Wu Y. Development of a certified genomic DNA reference material for detection and quantification of genetically modified rice KMD. Anal Bioanal Chem 2020; 412:7007-7016. [PMID: 32740822 DOI: 10.1007/s00216-020-02834-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/09/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
Qualitative and quantitative detection of genetically modified products is inseparable from the application of reference materials (RMs). In this study, a batch of genomic DNA (gDNA) certified reference materials (CRMs) was developed using genetically modified rice Kemingdao (KMD) homozygotes as the raw material. The gDNA CRMs in this batch showed good homogeneity; the minimum sample intake was determined to be 2 μL. The stability study showed that transportation by cold chain is preferable, no significant degradation trend was observed during a 12-month period when storing the gDNA CRMs at 4 °C and - 20 °C, and the number of freeze-thaw cycles cannot exceed 10. The property values of the copy number ratio of transgene and endogenous gene and the copy number concentration for gDNA CRMs were determined by a collaborative characterization of eight laboratories using the duplex KMD/PLD droplet digital PCR (ddPCR) assays. The uncertainty components of characterization, potential between-unit heterogeneity, and potential degradation during long-term storage were combined to estimate the expanded uncertainty of the certified value with a coverage factor k of 2.0. The certified value of copy number ratio for KMD gDNA CRM is 0.99 ± 0.05, and that of copy number concentration is (1.76 ± 0.10) × 105 copies/μL. Compared to the gDNA CRMs in availability, this batch of KMD gDNA CRMs is assigned accurate property values and can be directly used for qualitative and quantitative detection of GMOs as well as evaluation of the parameters of analytical methods with no need of further DNA concentration measurement. Graphical abstract.
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Affiliation(s)
- Jun Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China
| | - Liang Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Li Zhang
- School of Life Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Xiujie Zhang
- Development Center of Science and Technology, Ministry of Agriculture and Rural Affairs P. R. China, Beijing, 100025, China.
| | - Xiaying Li
- Development Center of Science and Technology, Ministry of Agriculture and Rural Affairs P. R. China, Beijing, 100025, China
| | - Shanshan Zhai
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China
| | - Hongfei Gao
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China
| | - Yunjing Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China
| | - Gang Wu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China.
| | - Yuhua Wu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, Hubei, China.
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4
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Establishment and application of a loop-mediated isothermal amplification method with double-stranded displacement probes to quantify the genetically modified rice M12 event. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-020-03430-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Deng T, Huang W, Ren J, Ma X, Ge Y, Chen Y. Verification and applicability of endogenous reference genes for quantifying GM rice by digital PCR. Anal Biochem 2019; 587:113442. [DOI: 10.1016/j.ab.2019.113442] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/16/2019] [Accepted: 09/16/2019] [Indexed: 11/28/2022]
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6
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Liu L, Wu L, Knauth S, Eickhorst T. Degradation of transgenic Bt-rice straw incorporated with two different paddy soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 244:415-421. [PMID: 31132623 DOI: 10.1016/j.jenvman.2019.05.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 06/09/2023]
Abstract
Transgenic Bt-rice is rice that has been genetically modified to produce insecticidal proteins (Cry1Ab/Ac) within the plant. Rice straw is incorporated into paddy soils after harvest for fertilization or to improve the soil structure. The incorporation of straw from transgenic Bt-rice may pose risks to the paddy soil system. The decomposition of Bt-rice straw and degradation of Cry1Ab/Ac proteins from the straw were investigated under laboratory conditions. In addition, effects of the incorporation with chopped rice straw on microbial communities in differently textured paddy soils were studied. The results indicated that the incorporation of straw from transgenic Bt-rice might have a slight influence on soil respiration and CH4 emissions in two paddy soils, i.e. the Silt Loam soil and the Silty Clay soil. Differences were also observed in the cumulative emissions of CO2 between the two amended paddy soils in addition to the well-known increase in emissions of both CO2 and CH4 due to straw incorporation. The Cry1Ab/Ac proteins from straw of transgenic Bt-rice were degraded in paddy soils. The rate of decline in the concentration of Cry1Ab/Ac proteins was different in the two soils. After 29 d of incubation, 61% and 42% of initial Cry1Ab/Ac proteins were detected in the silt loam and silty clay, respectively. As a result of the presence of the rice straw, the abundance of bacteria, archaea, and total cells were increased in two soils. The numbers of bacteria and total cells were 6.4% and 11.5% higher in the silt loam amended with straw of Bt-rice than non-Bt-rice, respectively. The silty clay displayed a similar trend as the silt loam.
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Affiliation(s)
- Ling Liu
- University of Bremen, Soil Microbial Ecology, Bremen, Germany
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Chinese Academy of Sciences, Institute of Soil Science, Nanjing, China
| | - Stefan Knauth
- University of Bremen, Soil Microbial Ecology, Bremen, Germany
| | - Thilo Eickhorst
- University of Bremen, Soil Microbial Ecology, Bremen, Germany.
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7
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Fu W, Wang C, Xu W, Zhu P, Lu Y, Wei S, Wu X, Wu Y, Zhao Y, Zhu S. Unintended effects of transgenic rice revealed by transcriptome and metabolism. GM CROPS & FOOD 2019; 10:20-34. [PMID: 30955410 DOI: 10.1080/21645698.2019.1598215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Genetically modified (GM) organisms have been developed for decades. However, unintended effects are the main concerns of safety assessment that needs to be carefully investigated. Here, eight varieties of GM rice that were developed in China were selected to assess the unintended effects through transcriptome and metabolism. There are 2892-8758 differentially expressed genes (DEGs) and 7-50 metabolites at significant level between GM varieties and their isogenic counterparts, which were far fewer than that between traditional rice varieties. The function enrichment analysis showed altered transcription in stress-related pathway and starch and sucrose metabolism. DEGs shared among eight GM samples constitute less than 1% of the genes in the genome, and none of them is reported more than four times. The insertion effect on the nearby gene expression and the associated metabolism is only restricted to 50 genes. All the results provide a comprehensive analysis of unintended effects and indication of difference in Chinese transgenic rice based on their backgrounds, transformation, and insertion elements.
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Affiliation(s)
- Wei Fu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Chenguang Wang
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
| | - Wenjie Xu
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
| | - Pengyu Zhu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Yun Lu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Shuang Wei
- d Guangdong Entry-Exit Inspection and Quarantine Bureau , Guangzhou , China
| | - Xiyang Wu
- e Department of Food Science and Engineering , Jinan University , Guangzhou , China
| | - Yuping Wu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Yiqiang Zhao
- b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China
| | - Shuifang Zhu
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
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8
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Wang X, Tang T, Miao Q, Xie S, Chen X, Tang J, Peng C, Xu X, Wei W, You Z, Xu J. Detection of transgenic rice line TT51-1 in processed foods using conventional PCR, real-time PCR, and droplet digital PCR. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.11.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Wu Y, Li J, Li X, Zhai S, Gao H, Li Y, Zhang X, Wu G. Development and strategy of reference materials for the DNA-based detection of genetically modified organisms. Anal Bioanal Chem 2019; 411:1729-1744. [DOI: 10.1007/s00216-019-01576-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 12/21/2018] [Accepted: 01/03/2019] [Indexed: 12/11/2022]
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10
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A new construct specific real-time PCR method for screening GMO ingredients with gat-tpinII cassette in foods, feeds and seeds. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.11.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Kamle M, Kumar P, Patra JK, Bajpai VK. Current perspectives on genetically modified crops and detection methods. 3 Biotech 2017; 7:219. [PMID: 28674844 PMCID: PMC5495694 DOI: 10.1007/s13205-017-0809-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/02/2017] [Indexed: 01/31/2023] Open
Abstract
Genetically modified (GM) crops are the fastest adopted commodities in the agribiotech industry. This market penetration should provide a sustainable basis for ensuring food supply for growing global populations. The successful completion of two decades of commercial GM crop production (1996-2015) is underscored by the increasing rate of adoption of genetic engineering technology by farmers worldwide. With the advent of introduction of multiple traits stacked together in GM crops for combined herbicide tolerance, insect resistance, drought tolerance or disease resistance, the requirement of reliable and sensitive detection methods for tracing and labeling genetically modified organisms in the food/feed chain has become increasingly important. In addition, several countries have established threshold levels for GM content which trigger legally binding labeling schemes. The labeling of GM crops is mandatory in many countries (such as China, EU, Russia, Australia, New Zealand, Brazil, Israel, Saudi Arabia, Korea, Chile, Philippines, Indonesia, Thailand), whereas in Canada, Hong Kong, USA, South Africa, and Argentina voluntary labeling schemes operate. The rapid adoption of GM crops has increased controversies, and mitigating these issues pertaining to the implementation of effective regulatory measures for the detection of GM crops is essential. DNA-based detection methods have been successfully employed, while the whole genome sequencing using next-generation sequencing (NGS) technologies provides an advanced means for detecting genetically modified organisms and foods/feeds in GM crops. This review article describes the current status of GM crop commercialization and discusses the benefits and shortcomings of common and advanced detection systems for GMs in foods and animal feeds.
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Affiliation(s)
- Madhu Kamle
- Department of Forestry, North Eastern Regional Institute of Science and Technology (Deemed University), Nirjuli, Arunachal Pradesh, 791109, India
| | - Pradeep Kumar
- Department of Forestry, North Eastern Regional Institute of Science and Technology (Deemed University), Nirjuli, Arunachal Pradesh, 791109, India.
| | - Jayanta Kumar Patra
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Gyeonggido, 10326, Korea
| | - Vivek K Bajpai
- Department of Applied Microbiology and Biotechnology, Microbiome Laboratory, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Korea.
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12
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Moreira F, Carneiro J, Pereira F. A proposal for standardization of transgenic reference sequences used in food forensics. Forensic Sci Int Genet 2017; 29:e26-e28. [PMID: 28506735 DOI: 10.1016/j.fsigen.2017.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 04/30/2017] [Indexed: 10/19/2022]
Affiliation(s)
- Filipa Moreira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal.
| | - João Carneiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal.
| | - Filipe Pereira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal.
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13
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Song J, Niu B, Wang D, Zhang F. Quantifying the measurement uncertainty of the nopaline synthase terminator in mixed samples of genetically modified rice using a bottom-up approach. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.11.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Kim JH, Park SB, Roh HJ, Shin MK, Moon GI, Hong JH, Kim HY. Event-specific qualitative and quantitative detection of five genetically modified rice events using a single standard reference molecule. Food Chem 2017; 226:187-192. [PMID: 28254011 DOI: 10.1016/j.foodchem.2017.01.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 01/03/2017] [Accepted: 01/13/2017] [Indexed: 11/17/2022]
Abstract
One novel standard reference plasmid, namely pUC-RICE5, was constructed as a positive control and calibrator for event-specific qualitative and quantitative detection of genetically modified (GM) rice (Bt63, Kemingdao1, Kefeng6, Kefeng8, and LLRice62). pUC-RICE5 contained fragments of a rice-specific endogenous reference gene (sucrose phosphate synthase) as well as the five GM rice events. An existing qualitative PCR assay approach was modified using pUC-RICE5 to create a quantitative method with limits of detection correlating to approximately 1-10 copies of rice haploid genomes. In this quantitative PCR assay, the square regression coefficients ranged from 0.993 to 1.000. The standard deviation and relative standard deviation values for repeatability ranged from 0.02 to 0.22 and 0.10% to 0.67%, respectively. The Ministry of Food and Drug Safety (Korea) validated the method and the results suggest it could be used routinely to identify five GM rice events.
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Affiliation(s)
- Jae-Hwan Kim
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Saet-Byul Park
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hyo-Jeong Roh
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Min-Ki Shin
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongju 28159, Republic of Korea
| | - Gui-Im Moon
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongju 28159, Republic of Korea
| | - Jin-Hwan Hong
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongju 28159, Republic of Korea
| | - Hae-Yeong Kim
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.
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15
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HE C, TANG Y, WANG S, LIU J, CHEN Y, DONG Y, SU H, TAN T. An Electrochemical DNA Biosensor Based on Au-reduced Graphene Oxide Nanocomposite for Transgenic Event Bt63 Detection. ANAL SCI 2017; 33:1155-1160. [DOI: 10.2116/analsci.33.1155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Chenmeng HE
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Yali TANG
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Sai WANG
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Jiahui LIU
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Ying CHEN
- Agro-product Safety Research Center, Chinese Academy of Inspection and Quarantine
| | - Yiyang DONG
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Haijia SU
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
| | - Tianwei TAN
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology
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16
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Zhang X, Tang Q, Wang X, Wang Z. Structure of Exogenous Gene Integration and Event-Specific Detection in the Glyphosate-Tolerant Transgenic Cotton Line BG2-7. PLoS One 2016; 11:e0158384. [PMID: 27379683 PMCID: PMC4933378 DOI: 10.1371/journal.pone.0158384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 06/15/2016] [Indexed: 11/25/2022] Open
Abstract
In this study, the flanking sequence of an inserted fragment conferring glyphosate tolerance on transgenic cotton line BG2-7 was analyzed by thermal asymmetric interlaced polymerase chain reaction (TAIL-PCR) and standard PCR. The results showed apparent insertion of the exogenous gene into chromosome D10 of the Gossypium hirsutum L. genome, as the left and right borders of the inserted fragment are nucleotides 61,962,952 and 61,962,921 of chromosome D10, respectively. In addition, a 31-bp cotton microsatellite sequence was noted between the genome sequence and the 5' end of the exogenous gene. In total, 84 and 298 bp were deleted from the left and right borders of the exogenous gene, respectively, with 30 bp deleted from the cotton chromosome at the insertion site. According to the flanking sequence obtained, several pairs of event-specific detection primers were designed to amplify sequence between the 5' end of the exogenous gene and the cotton genome junction region as well as between the 3' end and the cotton genome junction region. Based on screening tests, the 5'-end primers GTCATAACGTGACTCCCTTAATTCTCC/CCTATTACACGGCTATGC and 3'-end primers TCCTTTCGCTTTCTTCCCTT/ACACTTACATGGCGTCTTCT were used to detect the respective BG2-7 event-specific primers. The limit of detection of the former primers reached 44 copies, and that of the latter primers reached 88 copies. The results of this study provide useful data for assessment of BG2-7 safety and for accelerating its industrialization.
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Affiliation(s)
- Xiaobing Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- Biology Institute, Hebei Academy of Sciences, Shijiazhuan, China
| | - Qiaoling Tang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xujing Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhixing Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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17
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Fraiture MA, Roosens NH, Taverniers I, De Loose M, Deforce D, Herman P. Biotech rice: Current developments and future detection challenges in food and feed chain. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.03.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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18
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Zhang FL, Song J, Niu B, Yin Q, Chang LJ, Wang D, Liu WJ, Lei SR, Liu Y. An event-specific qualitative and real-time PCR detection of 98140 maize in mixed samples. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Petrillo M, Angers-Loustau A, Henriksson P, Bonfini L, Patak A, Kreysa J. JRC GMO-Amplicons: a collection of nucleic acid sequences related to genetically modified organisms. DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2015; 2015:bav101. [PMID: 26424080 PMCID: PMC4589694 DOI: 10.1093/database/bav101] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/10/2015] [Indexed: 01/08/2023]
Abstract
The DNA target sequence is the key element in designing detection methods for genetically modified organisms (GMOs). Unfortunately this information is frequently lacking, especially for unauthorized GMOs. In addition, patent sequences are generally poorly annotated, buried in complex and extensive documentation and hard to link to the corresponding GM event. Here, we present the JRC GMO-Amplicons, a database of amplicons collected by screening public nucleotide sequence databanks by in silico determination of PCR amplification with reference methods for GMO analysis. The European Union Reference Laboratory for Genetically Modified Food and Feed (EU-RL GMFF) provides these methods in the GMOMETHODS database to support enforcement of EU legislation and GM food/feed control. The JRC GMO-Amplicons database is composed of more than 240 000 amplicons, which can be easily accessed and screened through a web interface. To our knowledge, this is the first attempt at pooling and collecting publicly available sequences related to GMOs in food and feed. The JRC GMO-Amplicons supports control laboratories in the design and assessment of GMO methods, providing inter-alia in silico prediction of primers specificity and GM targets coverage. The new tool can assist the laboratories in the analysis of complex issues, such as the detection and identification of unauthorized GMOs. Notably, the JRC GMO-Amplicons database allows the retrieval and characterization of GMO-related sequences included in patents documentation. Finally, it can help annotating poorly described GM sequences and identifying new relevant GMO-related sequences in public databases. The JRC GMO-Amplicons is freely accessible through a web-based portal that is hosted on the EU-RL GMFF website. Database URL: http://gmo-crl.jrc.ec.europa.eu/jrcgmoamplicons/
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Affiliation(s)
- Mauro Petrillo
- Molecular Biology and Genomics Unit, Joint Research Centre, European Commission, Ispra, Italy
| | | | - Peter Henriksson
- Molecular Biology and Genomics Unit, Joint Research Centre, European Commission, Ispra, Italy
| | - Laura Bonfini
- Molecular Biology and Genomics Unit, Joint Research Centre, European Commission, Ispra, Italy
| | - Alex Patak
- Molecular Biology and Genomics Unit, Joint Research Centre, European Commission, Ispra, Italy
| | - Joachim Kreysa
- Molecular Biology and Genomics Unit, Joint Research Centre, European Commission, Ispra, Italy
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Wang X, Chen X, Xu J, Wang P, Shen W. Multiplex event-specific qualitative polymerase chain reaction for detecting three transgenic rice lines and application of a standard plasmid as a quantitative reference molecule. Anal Biochem 2014; 464:1-8. [PMID: 25026190 DOI: 10.1016/j.ab.2014.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 07/05/2014] [Accepted: 07/07/2014] [Indexed: 11/18/2022]
Abstract
The three most well-known genetically modified (GM) rice lines in China are TT51-1, KMD1, and KF6. The purposes of this study were to establish a multiplex event-specific qualitative polymerase chain reaction (meqPCR) system for simultaneous detection of the three transgenic rice events and to construct a plasmid as the reference molecule for quantitative analysis. Event-specific primers for each event were selected or designed by focusing on the transgene borders between the inserted DNA and the flanking rice DNA. The developed meqPCR was anticipated to detect distinct amplicons as 454, 398, 301, and 250bp from KF6, KMD1, TT51-1, and the rice endogenous reference gene, respectively. The robustness of the meqPCR was tested with different levels of the three transgenic rice genomic DNAs, and the sensitivity threshold of the meqPCR was at least 50ng of 0.1% rice DNA for each event when the three transgenic rice events present and with other GM materials together. The constructed plasmid was evaluated using mixed samples with known GM contents in real-time quantitative PCR. The results indicated that the constructed plasmid was acceptable and suitable for GM rice quantitative analysis.
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Affiliation(s)
- Xiaofu Wang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Xiaoyun Chen
- Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Junfeng Xu
- Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Pengfei Wang
- College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China
| | - Wenbiao Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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21
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Zhang G, Sun H, Li F, Yang S, Xu XH, Gao R, Zhao L, Lu X. The construction of a fluorescent nano-probe and its application in detecting transgenic Bt rice TT51-1. RSC Adv 2014. [DOI: 10.1039/c4ra06590e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A fluorescent nano-probe that simultaneously detects the rice endogenous housekeeping gene SPS and the exogenous Bt gene (Cry1Ab/Ac).
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Affiliation(s)
- Guangyuan Zhang
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Hongwei Sun
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Fan Li
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Shuke Yang
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Xiao Hui Xu
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Rui Gao
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
| | - Lei Zhao
- College of Life Science
- Shandong Normal University
- Jinan, China
| | - Xingbo Lu
- Institute of Plant Protection
- Shandong Academy of Agricultural Sciences
- Shandong Key Laboratory of Plant Virology
- Jinan, China
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Yang L, Wang C, Holst-Jensen A, Morisset D, Lin Y, Zhang D. Characterization of GM events by insert knowledge adapted re-sequencing approaches. Sci Rep 2013; 3:2839. [PMID: 24088728 PMCID: PMC3789143 DOI: 10.1038/srep02839] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 09/16/2013] [Indexed: 11/23/2022] Open
Abstract
Detection methods and data from molecular characterization of genetically modified (GM) events are needed by stakeholders of public risk assessors and regulators. Generally, the molecular characteristics of GM events are incomprehensively revealed by current approaches and biased towards detecting transformation vector derived sequences. GM events are classified based on available knowledge of the sequences of vectors and inserts (insert knowledge). Herein we present three insert knowledge-adapted approaches for characterization GM events (TT51-1 and T1c-19 rice as examples) based on paired-end re-sequencing with the advantages of comprehensiveness, accuracy, and automation. The comprehensive molecular characteristics of two rice events were revealed with additional unintended insertions comparing with the results from PCR and Southern blotting. Comprehensive transgene characterization of TT51-1 and T1c-19 is shown to be independent of a priori knowledge of the insert and vector sequences employing the developed approaches. This provides an opportunity to identify and characterize also unknown GM events.
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Affiliation(s)
- Litao Yang
- 1] Collaborative Innovation center for biosafety of GMOs, National Center for Molecular Characterization of GMOs, School of Life Science and Biotechnology, Shanghai Jiao Tong University. 800 Dongchuan Road, Shanghai 200240. P. R. China [2]
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23
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Block A, Debode F, Grohmann L, Hulin J, Taverniers I, Kluga L, Barbau-Piednoir E, Broeders S, Huber I, Van den Bulcke M, Heinze P, Berben G, Busch U, Roosens N, Janssen E, Žel J, Gruden K, Morisset D. The GMOseek matrix: a decision support tool for optimizing the detection of genetically modified plants. BMC Bioinformatics 2013; 14:256. [PMID: 23965170 PMCID: PMC3765097 DOI: 10.1186/1471-2105-14-256] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 08/06/2013] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Since their first commercialization, the diversity of taxa and the genetic composition of transgene sequences in genetically modified plants (GMOs) are constantly increasing. To date, the detection of GMOs and derived products is commonly performed by PCR-based methods targeting specific DNA sequences introduced into the host genome. Information available regarding the GMOs' molecular characterization is dispersed and not appropriately organized. For this reason, GMO testing is very challenging and requires more complex screening strategies and decision making schemes, demanding in return the use of efficient bioinformatics tools relying on reliable information. DESCRIPTION The GMOseek matrix was built as a comprehensive, online open-access tabulated database which provides a reliable, comprehensive and user-friendly overview of 328 GMO events and 247 different genetic elements (status: 18/07/2013). The GMOseek matrix is aiming to facilitate GMO detection from plant origin at different phases of the analysis. It assists in selecting the targets for a screening analysis, interpreting the screening results, checking the occurrence of a screening element in a group of selected GMOs, identifying gaps in the available pool of GMO detection methods, and designing a decision tree. The GMOseek matrix is an independent database with effective functionalities in a format facilitating transferability to other platforms. Data were collected from all available sources and experimentally tested where detection methods and certified reference materials (CRMs) were available. CONCLUSIONS The GMOseek matrix is currently a unique and very valuable tool with reliable information on GMOs from plant origin and their present genetic elements that enables further development of appropriate strategies for GMO detection. It is flexible enough to be further updated with new information and integrated in different applications and platforms.
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Affiliation(s)
- Annette Block
- Walloon Agricultural Research Centre (CRA-W), Gembloux, Belgium.
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Wu Y, Yang L, Cao Y, Song G, Shen P, Zhang D, Wu G. Collaborative validation of an event-specific quantitative real-time PCR method for genetically modified rice event TT51-1 detection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:5953-5960. [PMID: 23731165 DOI: 10.1021/jf401339k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this study, a collaborative trial of validating a real-time PCR method for the TT51-1 rice event was organized, including six participating laboratories. In this validation, serially diluted solutions from homogeneous genomic DNA of the TT51-1 event were used to construct standard curves of the TT51-1 event and phospholipase D (PLD) assays. The PCR efficiency was 95%, and the R(2) coefficient was 0.99 for the TT51-1 system. The mean quantitative values for blind samples containing 0.1%, 0.5% 1%, 5%, and 10% (w/w) TT51-1 corresponded to 0.1%, 0.51%, 1.06%, 4.83%, and 9.62%, respectively, with a bias (%) ranging from -3.77% to 5.87%. The repeatability and reproducibility were all below 25% across the entire dynamic range. Furthermore, the measurement uncertainties of the quantitative results were estimated to be 0.10%, 0.20%, 0.40%, 1.76%, and 3.52% (w/w) for the tested samples. Both the LOD and LOQ were calculated to be 0.22%. This collaborative trial demonstrated that the TT51-1 method produces reliable, comparable, and reproducible results for a given sample set and can be adopted as a detection standard for testing laboratories.
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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
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25
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Ballari RV, Martin A, Gowda LR. Detection and identification of genetically modified EE-1 brinjal (Solanum melongena) by single, multiplex and SYBR® real-time PCR. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:340-347. [PMID: 22729745 DOI: 10.1002/jsfa.5764] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/28/2012] [Accepted: 05/14/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND Brinjal is an important vegetable crop. Major crop loss of brinjal is due to insect attack. Insect-resistant EE-1 brinjal has been developed and is awaiting approval for commercial release. Consumer health concerns and implementation of international labelling legislation demand reliable analytical detection methods for genetically modified (GM) varieties. RESULTS End-point and real-time polymerase chain reaction (PCR) methods were used to detect EE-1 brinjal. In end-point PCR, primer pairs specific to 35S CaMV promoter, NOS terminator and nptII gene common to other GM crops were used. Based on the revealed 3' transgene integration sequence, primers specific for the event EE-1 brinjal were designed. These primers were used for end-point single, multiplex and SYBR-based real-time PCR. End-point single PCR showed that the designed primers were highly specific to event EE-1 with a sensitivity of 20 pg of genomic DNA, corresponding to 20 copies of haploid EE-1 brinjal genomic DNA. The limits of detection and quantification for SYBR-based real-time PCR assay were 10 and 100 copies respectively. CONCLUSION The prior development of detection methods for this important vegetable crop will facilitate compliance with any forthcoming labelling regulations.
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MESH Headings
- Bacillus thuringiensis Toxins
- Bacterial Proteins/genetics
- Bacterial Proteins/metabolism
- Benzothiazoles
- Crops, Agricultural/genetics
- Crops, Agricultural/metabolism
- Diamines
- Endotoxins/genetics
- Endotoxins/metabolism
- Fluorescent Dyes/chemistry
- Food Inspection/methods
- Food Inspection/standards
- Food Labeling/legislation & jurisprudence
- Food, Genetically Modified/adverse effects
- Hemolysin Proteins/genetics
- Hemolysin Proteins/metabolism
- India
- Legislation, Food
- Limit of Detection
- Multiplex Polymerase Chain Reaction
- Organic Chemicals/chemistry
- Pest Control, Biological
- Plant Proteins/genetics
- Plant Proteins/metabolism
- Plant Proteins, Dietary/genetics
- Plant Proteins, Dietary/metabolism
- Plants, Genetically Modified/genetics
- Plants, Genetically Modified/metabolism
- Promoter Regions, Genetic
- Quinolines
- RNA, Messenger/metabolism
- Real-Time Polymerase Chain Reaction
- Solanum melongena/genetics
- Solanum melongena/metabolism
- Terminator Regions, Genetic
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Affiliation(s)
- Rajashekhar V Ballari
- Department of Food Safety and Analytical Quality Control Laboratory, CSIR-Central Food Technological Research Institute, Mysore 570 020, India
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26
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Chen X, Wang X, Jin N, Zhou Y, Huang S, Miao Q, Zhu Q, Xu J. Endpoint visual detection of three genetically modified rice events by loop-mediated isothermal amplification. Int J Mol Sci 2012. [PMID: 23203072 PMCID: PMC3509588 DOI: 10.3390/ijms131114421] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Genetically modified (GM) rice KMD1, TT51-1, and KF6 are three of the most well known transgenic Bt rice lines in China. A rapid and sensitive molecular assay for risk assessment of GM rice is needed. Polymerase chain reaction (PCR), currently the most common method for detecting genetically modified organisms, requires temperature cycling and relatively complex procedures. Here we developed a visual and rapid loop-mediated isothermal amplification (LAMP) method to amplify three GM rice event-specific junction sequences. Target DNA was amplified and visualized by two indicators (SYBR green or hydroxy naphthol blue [HNB]) within 60 min at an isothermal temperature of 63 °C. Different kinds of plants were selected to ensure the specificity of detection and the results of the non-target samples were negative, indicating that the primer sets for the three GM rice varieties had good levels of specificity. The sensitivity of LAMP, with detection limits at low concentration levels (0.01%–0.005% GM), was 10- to 100-fold greater than that of conventional PCR. Additionally, the LAMP assay coupled with an indicator (SYBR green or HNB) facilitated analysis. These findings revealed that the rapid detection method was suitable as a simple field-based test to determine the status of GM crops.
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Affiliation(s)
- Xiaoyun Chen
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
| | - Xiaofu Wang
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
| | - Nuo Jin
- School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China; E-Mail:
| | - Yu Zhou
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
| | - Sainan Huang
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
- College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China
| | - Qingmei Miao
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
| | - Qing Zhu
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
| | - Junfeng Xu
- Institute of Agriculture Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mails: (X.C.); (X.W.); (Y.Z.); (S.H.); (Q.M.); (Q.Z.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-571-8641-5202; Fax: +86-571-8640-1834
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Holst-Jensen A, Bertheau Y, de Loose M, Grohmann L, Hamels S, Hougs L, Morisset D, Pecoraro S, Pla M, den Bulcke MV, Wulff D. Detecting un-authorized genetically modified organisms (GMOs) and derived materials. Biotechnol Adv 2012; 30:1318-35. [DOI: 10.1016/j.biotechadv.2012.01.024] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 01/06/2012] [Accepted: 01/25/2012] [Indexed: 01/25/2023]
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In-depth analysis of the endogenous reference genes used in the quantitative PCR detection systems for rice. Eur Food Res Technol 2012. [DOI: 10.1007/s00217-012-1707-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang XF, Chen XY, Zhang XM, Zhou Y, Zhang HC, Miao QM, Fang J, Xu JF. [Molecular characteristics and specific PCR detection of transgenic rice containing Cry1Ab]. YI CHUAN = HEREDITAS 2012; 34:208-214. [PMID: 22382062 DOI: 10.3724/sp.j.1005.2012.00208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bt01 is a new type of rice that has been genetically modified to express Cry1Abprotein. This study confirmed that Cry1Abwas inserted into Bt01 as a single copy using Southern blotting analysis. TAIL-PCR method was further used to obtain its insertion site information. Specific PCR primers and TaqMan probes were designed based on the 5'-integration junction sequence of transgenic rice Bt01. The results showed that the limit of detection (LOD) was ten copies in qualitative PCR. The quantitative PCR assay showed that the LOD was five copies, and the limit of quantification (LOQ) was ten cop-ies. In addition, the accuracy of the established quantitative PCR was verified by detecting two samples containing 3% and 0.5%Bt01, respectively. The quantitative PCR analysis showed the results were 2.7% and 0.47%, respectively.The above results indicated that the event-specific PCR methods developed have high specificity and good sensitivity, which could be effective methods for identifying and testing the genetically modified Bt01 rice.
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Affiliation(s)
- Xiao-Fu Wang
- Zhejiang Academy of Agricultural Sciences, Hangzhou, China.
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30
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Guertler P, Huber I, Pecoraro S, Busch U. Development of an event-specific detection method for genetically modified rice Kefeng 6 by quantitative real-time PCR. J Verbrauch Lebensm 2011. [DOI: 10.1007/s00003-011-0748-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cao Y, Wu G, Wu Y, Nie S, Zhang L, Lu C. Characterization of the transgenic rice event TT51-1 and construction of a reference plasmid. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:8550-8559. [PMID: 21749035 DOI: 10.1021/jf201699s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Transgenic rice TT51-1 (BT63) is an insect resistant strain that was granted for safety certificate in China in 2009. This study characterizes the transgenic event TT51-1 using a GenomeWalker strategy. The organization of the transgenes indicated that the transgenes on two plasmids, pFHBT1 and pGL2RC7, had been integrated at the same locus. The sequence of the event TT51-1 spanned 8725 bp, including a truncated Cry1Ab/Ac cassette, an intact Cry1Ab/Ac cassette, two Amp gene segments, and an Hph gene segment. The 5' and 3' plant flanking sequences were isolated and used to locate the transgenes to chromosome 10 in TT51-1. The isolated TT51-1 fragment and a fragment of the rice PLD gene were integrated into a plasmid vector, to create plasmid pK-TT51 as a calibrator for detecting rice containing TT51-1. Analysis of unknown samples indicated that the reference plasmid was a reliable alternative to TT51-1 genomic DNA.
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Affiliation(s)
- Yinglong Cao
- Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oilcrops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, China
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Chen M, Shelton A, Ye GY. Insect-resistant genetically modified rice in China: from research to commercialization. ANNUAL REVIEW OF ENTOMOLOGY 2011; 56:81-101. [PMID: 20868281 DOI: 10.1146/annurev-ento-120709-144810] [Citation(s) in RCA: 158] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
From the first insect-resistant genetically modified (IRGM) rice transformation in 1989 in China to October 2009 when the Chinese Ministry of Agriculture issued biosafety certificates for commercial production of two cry1Ab/Ac Bacillus thuringiensis (Bt) lines, China made a great leap forward from IRGM rice basic research to potential commercialization of the world's first IRGM rice. Research has been conducted on developing IRGM rice, assessing its environmental and food safety impacts, and evaluating its socioeconomic consequences. Laboratory and field tests have confirmed that these two Bt rice lines can provide effective and economic control of the lepidopteran complex on rice with less risk to the environment than present practices. Commercializing these Bt plants, while developing other GM plants that address the broader complex of insects and other pests, will need to be done within a comprehensive integrated pest management program to ensure the food security of China and the world.
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Affiliation(s)
- Mao Chen
- Department of Entomology, Cornell University/NYSAES, Geneva, New York 14456, USA.
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33
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Integrated structure and event-specific real-time detection of transgenic cry1Ac/SCK rice Kefeng 6. Eur Food Res Technol 2010. [DOI: 10.1007/s00217-010-1399-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Liu D, Shen J, Yang L, Zhang D. Evaluation of the impacts of different nuclear DNA content in the hull, endosperm, and embryo of rice seeds on GM rice quantification. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:4582-4587. [PMID: 20222712 DOI: 10.1021/jf9044233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Rice (Oryza sativa) is a main staple food in the world, and several genetically modified (GM) rice events have been approved for commercialization. To accurately quantify GM contents in rice derived products, we have evaluated the variation of seed DNA density and nuclear DNA content in the hull, endosperm, and embryo of rice seeds from 19 cultivars, as well as their impacts on GM rice quantification. Rice endosperm DNA accounts for 73.71% of total seed DNA, whereas the hull and embryo DNAs account for 3.98% and 22.31%, respectively. Two formulas were established to describe the relationship between GM content on the basis of weight ratio (GM(wt)%) and that on the basis of haploid genome copy number ratio (GM(hg)%) for the samples containing heterozygous GM rice seeds. These two equations were well confirmed in quantification of the heterozygous GM rice TT51-1 seeds containing the GM allele from a female parent or that from a male parent. This work is useful for accurate quantification of GM rice using reference materials containing the heterozygous GM rice seed powder.
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Affiliation(s)
- Donger Liu
- GMO Detection Laboratory, SJTU-Bor Luh Food Safety Center, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
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