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Li C, Shi Y, Yang G, Xia XS, Mao X, Fang Y, Zhang AM, Song Y. Establishment of loop-mediated isothermal amplification for rapid detection of Pseudomonas aeruginosa. Exp Ther Med 2018; 17:131-136. [PMID: 30651773 PMCID: PMC6307377 DOI: 10.3892/etm.2018.6910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 09/21/2018] [Indexed: 12/18/2022] Open
Abstract
Pseudomonas aeruginosa is one of the three most pathogenic bacteria that frequently cause life-threatening opportunistic human infections, pneumonia, and lower respiratory tract infections in immunocompromised hosts, particularly in the burns ward. The present study aimed to establish a loop-mediated isothermal amplification (LAMP) method for the rapid and sensitive detection of P. aeruginosa-specific gene hypothetical protein (GenBank ID: 882161). The gene was obtained through local and online BLAST, and specific primers were designed for this gene. Reaction conditions were optimized at 65°C for 30 min and 80°C for 2 min, whereas the reaction system contained 5.2 mM Mg2+, 8 U Bst 2.0 DNA polymerase, 1.4 mM deoxyribonucleotide and 0.2 and 1.6 µM of the outer and inner primers, respectively. The LAMP method was evaluated using 150 P. aeruginosa and 170 non-P. aeruginosa strains. Positive reactions were observed on 150 P. aeruginosa strains, whereas all non-P. aeruginosa strains exhibited negative results. Plasmids with the specific gene and mouse blood with P. aeruginosa were used for sensitivity assay. The detection limit of LAMP was 1 bacterium/reaction. Results indicated that the LAMP method targeted to hypothetical protein is a fast, specific, sensitive, inexpensive and suitable method for detection of P. aeruginosa.
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Affiliation(s)
- Chao Li
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - Yaoqiang Shi
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - Guangying Yang
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - Xue-Shan Xia
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - Xiaoqin Mao
- Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China.,Department of Clinical Laboratory, First People's Hospital of Yunnan Province, Kunming, Yunnan 650034, P.R. China
| | - Yue Fang
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - A-Mei Zhang
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
| | - Yuzhu Song
- Molecular Diagnosis Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, P.R. China.,Molecular Medicine Center of Yunnan Province, Kunming, Yunnan 650500, P.R. China
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3
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Tung HY, Wang SH, Chiang YC, Tsai MS. Rapid screening of roundup ready soybean in food samples by a hand-held PCR device. Food Sci Biotechnol 2016; 25:1101-1107. [PMID: 30263381 DOI: 10.1007/s10068-016-0177-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 04/10/2016] [Accepted: 05/18/2016] [Indexed: 01/06/2023] Open
Abstract
Insulated isothermal PCR (iiPCR) method was recently available for rapid on-site detection of roundup ready soybean (RRS; event GTS40-3-2) in food materials and products. Performance of this method was evaluated in this study. The 100% detection endpoint for the RRS by iiPCR was found in samples containing 0.1% RRS, equivalent to the results of the reference real-time PCR (rtPCR). Analysis of nucleic acids of soybean-based processed food products indicated 95% agreement between the iiPCR and rtPCR for RRS detection. By testing soybean milk and tofu samples using simple pretreatment methods, we found that the agreements between iiPCR and rtPCR methods of the aforementioned samples were 80% and 90%, respectively. Replicated tests of all discrepant samples implied that these samples had trace amounts of RRS, suggesting that the iiPCR system is more sensitive than the rtPCR method. In conclusion, the iiPCR technology can be a useful point-of-need tool to help make a timely decision in the consumption of genetically modified organisms.
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Affiliation(s)
- Hsiang-Yun Tung
- 1College of Biotechnology and Bioresources, Da-Yeh University, Changhua, Taiwan, 51591 China
| | - Sue-Hong Wang
- Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan, 402 China
| | - Yu-Cheng Chiang
- Department of Food Science and Technology, Hung Kuang University, Taichung, Taiwan, 43302 China
| | - Ming-Shiun Tsai
- 1College of Biotechnology and Bioresources, Da-Yeh University, Changhua, Taiwan, 51591 China
- 4Department of BioIndustry Technology, Da-Yeh University, Changhua, Taiwan, 51591 China
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Zhou D, Wang C, Li Z, Chen Y, Gao S, Guo J, Lu W, Su Y, Xu L, Que Y. Detection of Bar Transgenic Sugarcane with a Rapid and Visual Loop-Mediated Isothermal Amplification Assay. FRONTIERS IN PLANT SCIENCE 2016; 7:279. [PMID: 27014303 PMCID: PMC4782128 DOI: 10.3389/fpls.2016.00279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 02/21/2016] [Indexed: 06/05/2023]
Abstract
Genetic engineering offers an attractive alternative in sugarcane breeding for increasing cane and sugar yields as well as disease and insect resistance. Bar transgenic sugarcane employing the herbicide tolerance is a useful agronomical trait in weed control. In this study, a loop-mediated isothermal amplification (LAMP) assay for rapid detection of the bar gene in transgenic sugarcane has been developed and evaluated. A set of six primers was designed for LAMP-based amplification of the bar gene. The LAMP reaction conditions were optimized as follows: 5.25 mM of Mg(2+), 6:1 ratio of inner vs. outer primer, and 6.0 U of Bst DNA polymerase in a reaction volume of 25.0 μL. The detection limit of the recombinant plasmid 1Ac0229 was as low as 10 copies in the developed LAMP, which was 10-fold higher sensitive than that of conventional PCR. In 100 putative transgenic lines, the bar gene was detected in 100/100 cases (100%) by LAMP and 97/100 cases (97%) by conventional PCR, respectively. In conclusion, the developed LAMP assay is visual, rapid, sensitive, reliable, and cost-effective for detection of the bar specific transgenic sugarcane.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Liping Xu
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Fujian Agriculture and Forestry University, Ministry of AgricultureFuzhou, China
| | - Youxiong Que
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Fujian Agriculture and Forestry University, Ministry of AgricultureFuzhou, China
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