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Wang Y, Zhang L, Shen Y, Yu EYW, Ding X. Nested Phosphorothioated Hybrid Primer-Mediated Isothermal Amplification for Specific and Dye-Based Subattomolar Nucleic Acid Detection at Low Temperatures. ACS Sens 2023; 8:1261-1271. [PMID: 36867102 DOI: 10.1021/acssensors.2c02754] [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: 03/04/2023]
Abstract
Developing dye-based isothermal nucleic acid amplification (INAA) at low temperatures such as 37 °C remains a technical challenge. Here, we describe a nested phosphorothioated (PS) hybrid primer-mediated isothermal amplification (NPSA) assay which only utilizes EvaGreen (a DNA-binding dye) to achieve specific and dye-based subattomolar nucleic acid detection at 37 °C. The success of low-temperature NPSA essentially depends on employing Bacillus smithii DNA polymerase, a strand-displacing DNA polymerase with wide range of activation temperature. However, the NPSA's high efficiency entails nested PS-modified hybrid primers and the additives of urea and T4 Gene 32 Protein. To address the inhibition of urea on reverse transcription (RT), one-tube two-stage recombinase-aided RT-NPSA (rRT-NPSA) is established. By targeting human Kirsten rat sarcoma viral (KRAS) oncogene, NPSA (rRT-NPSA) stably detects 0.2 aM of KRAS gene (mRNA) within 90 (60) min. In addition, rRT-NPSA possesses subattomolar sensitivity to detect human ribosomal protein L13 mRNA. The NPSA/rRT-NPSA assays are also validated to obtain consistent results with PCR/RT-PCR methods on qualitatively detecting DNA/mRNA targets extracted from cultured cells and clinical samples. As a dye-based, low-temperature INAA method, NPSA inherently facilitates the development of miniaturized diagnostic biosensors.
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Affiliation(s)
- Yaru Wang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
- Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China
| | - Lanxiang Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
- Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China
| | - Yuqing Shen
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
- Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China
| | - Evan Yi-Wen Yu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
- Department of Epidemiology & Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China
| | - Xiong Ding
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
- Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China
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2
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Wu H, Zhang X, Wu B, Qian C, Zhang F, Wang L, Ye Z, Wu J. Rapid on-site detection of genetically modified soybean products by real-time loop-mediated isothermal amplification coupled with a designed portable amplifier. Food Chem 2020; 323:126819. [PMID: 32334306 DOI: 10.1016/j.foodchem.2020.126819] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 04/06/2020] [Accepted: 04/13/2020] [Indexed: 12/29/2022]
Abstract
Herein, we developed a rapid method for detection of genetically modified soybean (GTS 40-3-2) products using loop-mediated isothermal amplification (LAMP). A crude 5-minute extraction method was established for DNA extraction from soybeans and soybean products. LAMP reaction for CaMV35S promoter was optimized and the fastest threshold time (Tt) was 14 min with 4 mM magnesium ions at 63 °C. A portable instrument was designed to perform real-time LAMP in the field. As little as 0.1% GM soybean, specifically, or 0.5% GM ingredients in Chinese traditional tofu could be detected in 30 min from sampling to results. We used this method to further assess other five soybean products to determine whether they contained transgenic ingredients and compared the results with those obtained using PCR, which suggested the proposed method was applicable for rapid detection of genetically modified soybean in food products.
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Affiliation(s)
- Hui Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xianjun Zhang
- Hangzhou An Yu Technologies Co.,Ltd., Hangzhou 310021, China
| | - Baoqiang Wu
- Hangzhou An Yu Technologies Co.,Ltd., Hangzhou 310021, China
| | - Cheng Qian
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Fang Zhang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
| | - Liu Wang
- Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, State Key Laboratory for Quality and Safety of Agro-products, Hangzhou 310021, China.
| | - Zunzhong Ye
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Jian Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
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3
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Zhang M, Liu C, Shi Y, Wu J, Wu J, Chen H. Selective endpoint visualized detection of Vibrio parahaemolyticus with CRISPR/Cas12a assisted PCR using thermal cycler for on-site application. Talanta 2020; 214:120818. [PMID: 32278427 DOI: 10.1016/j.talanta.2020.120818] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/15/2020] [Accepted: 02/09/2020] [Indexed: 12/26/2022]
Abstract
Vibrio parahaemolyticus is a major cause of seafood-associated food poisoning. It is of great significance to develop an accurate, simple and cost-effective method to identify infected seafood, especially for on-site application. Polymerase chain reaction (PCR) remains the golden standard for nucleic acid detection. But traditional methods heavily reply on sophisticated instrument and specialized operators, which limits the application for on-site detections. Here we developed a novel, specific and visualized detection method for PCR based on CRISPR/Cas12a system. On a low-cost thermal cycler, amplification reaction can be conducted easily. The CRISPR/Cas12a system was specifically designed to evaluate amplicons, eliminating false positive results. Besides the negative samples remained colorless, the positive samples generated obvious green fluorescence, which could be easily distinguished by the naked eye using a homemade UV device. The presented detection method was verified by detecting shrimp samples. The limit of detection is 1.02 × 102 copies/μL. This presented method provided a new strategy for specific endpoint detection of PCR and advanced its application in field for food safety assurance.
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Affiliation(s)
- Mengyao Zhang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Chengzhi Liu
- Key Laboratory of Microbiol Technology and Bioinformatics of Zhejiang Province, Zhejiang Institute of Microbiology, Hangzhou, 310012, China; NMPA Key Laboratory for Testing and Risk Warning of Pharmaceutical Microbiology, Zhejiang Institute of Microbiology, Hangzhou, 310012, China
| | - Ya Shi
- Key Laboratory of Microbiol Technology and Bioinformatics of Zhejiang Province, Zhejiang Institute of Microbiology, Hangzhou, 310012, China; NMPA Key Laboratory for Testing and Risk Warning of Pharmaceutical Microbiology, Zhejiang Institute of Microbiology, Hangzhou, 310012, China
| | - Jun Wu
- Lin'an Center for Disease Control and Prevention, Lin'an, 311300, China
| | - Jian Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
| | - Huan Chen
- Key Laboratory of Microbiol Technology and Bioinformatics of Zhejiang Province, Zhejiang Institute of Microbiology, Hangzhou, 310012, China; NMPA Key Laboratory for Testing and Risk Warning of Pharmaceutical Microbiology, Zhejiang Institute of Microbiology, Hangzhou, 310012, China.
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4
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Li X, Su Y, Chu H, Lyu S, Tian J, Xu W. Rapid strand replacement primer thermostat visual sensor based on Bst DNA polymerase and pyrophosphatase for detecting Vibrio parahaemolyticus. Food Chem 2019; 310:125955. [PMID: 31841941 DOI: 10.1016/j.foodchem.2019.125955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/22/2019] [Accepted: 11/24/2019] [Indexed: 11/17/2022]
Abstract
Vibrio parahaemolyticus is a major hidden danger of food safety. To develop a rapid, sensitive and on-site detecting method of Vibrio parahaemolyticus (V. parahaemolyticus), a strand replacement primer thermostat phosphate (SRPP) visual sensor was proposed, based on Bst DNA polymerase and pyrophosphatase. The novel strand replacement primer (SRP) facilitates chain substitution and to open a self-folding hairpin by adding region at its 3' end. Under the action of the SRP, a pair of external primers and two inner primers, target DNA is specifically amplified at 63 °C relies mainly on the hairpin. Many pyrophosphates (PPi) are simultaneously generated as by-products, which can be converted into phosphates (Pi) by pyrophosphatase for phosphomolybdate blue visual detection within 5 min. The proposed biosensor can detect 1.29 × 103 copies of V. parahaemolyticus within 35 min.
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Affiliation(s)
- Xuetong Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; College of Biological Science and Technology, Agricultural University of Shenyang, Shenyang 110866, China.
| | - Yuan Su
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Huashuo Chu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Shuxia Lyu
- College of Biological Science and Technology, Agricultural University of Shenyang, Shenyang 110866, China
| | - Jingjing Tian
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing 100083, China.
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5
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Development of cross-priming amplification coupled with vertical flow visualization for rapid detection of infectious spleen and kidney necrosis virus (ISKNV) in mandarin fish, Siniperca chuatsi. J Virol Methods 2017; 253:38-42. [PMID: 29288074 DOI: 10.1016/j.jviromet.2017.12.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 12/11/2017] [Accepted: 12/24/2017] [Indexed: 01/30/2023]
Abstract
Infectious spleen and kidney necrosis virus (ISKNV) has been recognized as the causative agent of the most serious disease in cultured mandarin fish, Siniperca chuatsi, in China. Disease outbreaks have resulted in substantial losses to the aquaculture industry. Currently, reliable laboratory detection and identification methods are available for this virus. However, rapid detection methods applicable for on-site diagnosis of this infectious agent are unavailable. To address this need, a nearly instrument-free, cost-effective and simple detection method was developed and optimized and incorporates cross priming amplification coupled with vertical flow visualization for rapid identification of ISKNV (ISKNV-CPA-VF). Results show that cross circulation amplification targeting the conserved region of the major capsid protein (MCP) regiment of the ISKNV genome had a sensitivity 10 times greater than traditional PCR at 64 °C within 60 min. The optimized concentration of dNTPs and the concentration for Mg2+ were 1.0 mmol/L and 10 mmol/L, respectively. No cross-reactions with other viruses or bacteria were observed. When combined with the nucleic acid strip detection technology, visual detection of ISKNV amplified products was realized within 3-5 min following amplification. The simplicity and nearly instrument-free method for this ISKNV-CPA-VF assay shows great potential for on-site diagnostics of ISKNV infection in Siniperca chuatsi.
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Wang R, Zhang F, Wang L, Qian W, Qian C, Wu J, Ying Y. Instant, Visual, and Instrument-Free Method for On-Site Screening of GTS 40-3-2 Soybean Based on Body-Heat Triggered Recombinase Polymerase Amplification. Anal Chem 2017; 89:4413-4418. [PMID: 28345860 DOI: 10.1021/acs.analchem.7b00964] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
On-site monitoring the plantation of genetically modified (GM) crops is of critical importance in agriculture industry throughout the world. In this paper, a simple, visual and instrument-free method for instant on-site detection of GTS 40-3-2 soybean has been developed. It is based on body-heat recombinase polymerase amplification (RPA) and followed with naked-eye detection via fluorescent DNA dye. Combining with extremely simplified sample preparation, the whole detection process can be accomplished within 10 min and the fluorescent results can be photographed by an accompanied smart phone. Results demonstrated a 100% detection rate for screening of practical GTS 40-3-2 soybean samples by 20 volunteers under different ambient temperatures. This method is not only suitable for on-site detection of GM crops but also demonstrates great potential to be applied in other fields.
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Affiliation(s)
- Rui Wang
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
| | - Fang Zhang
- College of Biological Science and Engineering, Fuzhou University , Fuzhou, 350108, China
| | - Liu Wang
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
| | - Wenjuan Qian
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
| | - Cheng Qian
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
| | - Jian Wu
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
| | - Yibin Ying
- College of Biosystems Engineering and Food Science, Zhejiang University , Hangzhou, 310058, China
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7
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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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8
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Meng S, Wang Y, Wang Y, Ye C. Rapid and sensitive detection of Plesiomonas shigelloides by cross‑priming amplification of the hugA gene. Mol Med Rep 2016; 14:5443-5450. [PMID: 27878230 PMCID: PMC5355691 DOI: 10.3892/mmr.2016.5937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 09/02/2016] [Indexed: 01/21/2023] Open
Abstract
Plesiomonas shigelloides (P. shigelloides) is implicated as an aetiological agent of human gastroenteritis in humans, for which reliable laboratory detection of P. shigelloides is clinically and epidemiologically desirable. A simple molecular method for rapid detection of P. shigelloides using cross-priming amplification (CPA) has been developed, with hugA as the target. The hugA gene is required for haem iron utilisation and is critical for the survival and growth of P. shigelloides. The assay output was visualised as a colour change with no need to open the reaction tubes, and no false-positive results were detected for the 33 non- P. shigelloides strains examined to assess assay specificity. The limit of detection was 200 fg P. shigelloides DNA per reaction and 3×103 CFU per g in human stools, which was 100 and 10-fold more sensitive than polymerase chain reaction, respectively. The CPA method was used to detect the presence of P. shigelloides in stool specimens from 70 patients with diarrhoea and 30 environmental water samples, with no difference in accuracy between the CPA assay and the biological culture. The present study, therefore, suggests that the P. shigelloides hugA CPA assay may represent a valuable tool for rapid and sensitive detection of P. shigelloides in primary care facilities and clinical laboratories.
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Affiliation(s)
- Shuang Meng
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Yi Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Yan Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Changyun Ye
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing 102206, P.R. China
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9
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Meng S, Wang Y, Wang Y, Liu D, Ye C. Development of cross-priming amplification assays for rapid and sensitive detection of Aeromonas hydrophila. Lett Appl Microbiol 2015; 61:171-8. [PMID: 26077282 DOI: 10.1111/lam.12439] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/07/2015] [Accepted: 05/04/2015] [Indexed: 01/14/2023]
Abstract
UNLABELLED Aeromonas hydrophila has been increasingly implicated as the aetiologic agent of various human diseases. Therefore, reliable laboratory detection and identification of this bacterium has become clinically and epidemiologically desirable. We developed a nearly instrument-free, simple molecular method for rapid detection of Aer. hydrophila using a cross-priming amplification (CPA) assay with the desA gene as the target. The desA gene is crucial for the survival and growth of Aer. hydrophila under iron starvation. The results can be visualized as colour changes without opening the reaction tubes. No false-positive results were observed for the 33 non-Aer. hydrophila strains tested to evaluate assay specificity. The limit of detection for Aer. hydrophila was approximately 200 copies of desA per reaction (on reference plasmids) and 5 × 10(3) CFU g(-1) Aer. hydrophila in simulated human stool, which is the same sensitivity as a qPCR assay. The performance of the CPA assay was also evaluated with 100 stool specimens from diarrhoea patients and 40 environmental water samples. In conclusion, the simplicity, cost-effectiveness and nearly instrument-free platform of the CPA assay make it practical for use in primary care facilities and smaller clinical laboratories. SIGNIFICANCE AND IMPACT OF THE STUDY Aeromonas hydrophila is a human pathogen that infects via exposed wounds or ingestion of contaminated water and food. In this study, a CPA-based PCR method was developed for specific, rapid, cost-effective detection of Aer. hydrophila, and the test results could be visualized without opening the reaction tubes. This is the first report on the application of the CPA method for the detection of Aer. hydrophila. This novel method could be practical for use in primary care facilities and smaller clinical laboratories.
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Affiliation(s)
- S Meng
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Y Wang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Y Wang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - D Liu
- Pathogenic Biology Institute, University of South China, Hengyang, Hunan, China
| | - C Ye
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
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Application of cross-priming amplification (CPA) for detection of fowl adenovirus (FAdV) strains. Arch Virol 2015; 160:1005-13. [PMID: 25655263 PMCID: PMC4369288 DOI: 10.1007/s00705-015-2355-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/28/2015] [Indexed: 02/03/2023]
Abstract
Fowl adenoviruses (FAdVs) are widely distributed among chickens. Detection of FAdVs is mainly accomplished by virus isolation, serological assays, various polymerase chain reaction (PCR) assays, and loop-mediated isothermal amplification (LAMP). To increase the diagnostic capacity of currently applied techniques, cross-priming amplification (CPA) for the detection of the FAdV hexon gene was developed. The single CPA assay was optimised to detect all serotypes 1-8a-8b-11 representing the species Fowl aviadenovirus A-E. The optimal temperature and incubation time were determined to be 68 °C for 2 h. Using different incubation temperatures, it was possible to differentiate some FAdV serotypes. The results were recorded after addition of SYBR Green I(®) dye, which produced a greenish fluorescence under UV light. The CPA products separated by gel electrophoresis showed different "ladder-like" patterns for the different serotypes. The assay was specific for all serotypes of FAdV, and no cross-reactivity was observed with members of the genus Atadenovirus, duck atadenovirus A (egg drop syndrome virus EDS-76 [EDSV]) or control samples containing Marek's disease virus (MDV), infectious laryngotracheitis virus (ILTV) or chicken anaemia virus (CAV). The results of the newly developed FAdV-CPA were compared with those of real-time PCR. The sensitivity of CPA was equal to that of real-time PCR and reached 10(-2.0) TCID50, but the CPA method was more rapid and cheaper than the PCR systems. CPA is a highly specific, sensitive, efficient, and rapid tool for detection of all FAdV serotypes. This is the first report on the application of CPA for detection of FAdV strains.
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11
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Zhang F, Wang L, Wang R, Ying Y, Wu J. Simple Screening Strategy with Only Water Bath Needed for the Identification of Insect-Resistant Genetically Modified Rice. Anal Chem 2015; 87:1523-6. [DOI: 10.1021/ac504384p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fang Zhang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Liu Wang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Rui Wang
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yibin Ying
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jian Wu
- College of Biosystems
Engineering
and Food Science, Zhejiang University, Hangzhou 310058, China
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12
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Zhang F, Wang R, Wang L, Wu J, Ying Y. Tracing phosphate ions generated during DNA amplification and its simple use for visual detection of isothermal amplified products. Chem Commun (Camb) 2014; 50:14382-5. [DOI: 10.1039/c4cc06973k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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13
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Zhang F, Wu J, Wang R, Wang L, Ying Y. Portable pH-inspired electrochemical detection of DNA amplification. Chem Commun (Camb) 2014; 50:8416-9. [DOI: 10.1039/c4cc03011g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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