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A high-throughput analytical method for multiple DNA targets based on microdroplet PCR coupled with DGGE. J Pharm Biomed Anal 2022; 216:114812. [DOI: 10.1016/j.jpba.2022.114812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/28/2022] [Accepted: 05/01/2022] [Indexed: 11/18/2022]
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Cao X, Xia Z, Yan W, He S, Xu X, Wei Z, Ye Y, Zheng H. Colorimetric biosensing of nopaline synthase terminator using Fe 3O 4@Au and hemin-functionalized reduced graphene oxide. Anal Biochem 2020; 602:113798. [PMID: 32505706 DOI: 10.1016/j.ab.2020.113798] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/23/2020] [Accepted: 05/25/2020] [Indexed: 12/16/2022]
Abstract
In this paper, we present a simple and label-free colorimetric biosensor for detection of the nopaline synthase (NOS) terminator in genetically modified (GM) plants. The "signal on" colorimetric biosensor was developed using a nanocomposite consisted of gold nanoparticles doped magnetic Fe3O4 nanoparticles (Fe3O4@Au NP), capture probe DNA (cDNA), and hemin-functionalized reduced graphene oxide nanosheets (H-GN). The nanocomposite was successfully prepared by means of Au-S bonds and the strong π interactions between cDNA and H-GN. The sensing approach is based on the excellent peroxidase-mimicking activity of H-GN and its different electrostatic interactions with single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). In presence of the target NOS, the cDNA in the nanocomposite will hybridize with its complementary sequence, and form dsDNA structure. Due to the weak π interactions between dsDNA and H-GN, a portion of H-GN will be released from the surface of Fe3O4@Au NPs and transferred into solution. After magnetic separation was performed, the supernatant was incubated with 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2. The released H-GN can catalyze the oxidation reaction of TMB and turn the colorless solution blue. This "signal-on" colorimetric biosensor shows a broad linear range of 0.5-100 nM for the target NOS, with a 0.19 nM detection limit. The application of the biosensor for determination of NOS segments in samples of GM and non-GM tomatoes shows that it can discriminate between GM and non-GM plants. The reliability of the method for samples of NOS-spiked GM tomato suggests satisfactory recoveries in the range of 93.6%-94.2%.
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Affiliation(s)
- Xiaodong Cao
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Zihao Xia
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Wuwen Yan
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Shudong He
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xuan Xu
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Zhaojun Wei
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yongkang Ye
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Haisong Zheng
- Technology Center of Hefei Customs, Hefei, 230032, China
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Shang Y, Xu Y, Huang K, Luo Y, Xu W. Multiplex pyrosequencing quantitative detection combined with universal primer-multiplex-PCR for genetically modified organisms. Food Chem 2020; 320:126634. [PMID: 32208182 DOI: 10.1016/j.foodchem.2020.126634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/27/2020] [Accepted: 03/16/2020] [Indexed: 10/24/2022]
Abstract
A multiplex pyrosequencing quantitative detection technique combined with universal primer-multiplex-PCR (UP-M-PCR) was established. In this study, a pyrosequencing results analysis software was first self-compiled, which realized the DNA sequences degeneration, and converted the pyrosequencing results and base composition of the target sequences into mathematic relations. Five calculation models were put forward based on the actual situation, which adjusted the values smaller than zero or the detection limit. By applying this method, samples containing five genetically modified (GM) lines mixed in random ratio were quantified, it showed that the quantification was very close to the actual value, and the detection sensitivity was as low as 1.47% of a single component, which satisfied most labeling policies. This novel method is realized without fluorescent group labeling, hence the number of targets is not limited by factors inherent in method or equipment, and is proven to be a reliable tool for the quantitative detection.
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Affiliation(s)
- Ying Shang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; Faulty of Agriculture and Food, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
| | - Yuancong Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Yunbo Luo
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China.
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Qian C, Wang R, Wu H, Ping J, Wu J. Recent advances in emerging DNA-based methods for genetically modified organisms (GMOs) rapid detection. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Bae NH, Lim SY, Song Y, Jeong SW, Shin SY, Kim YT, Lee TJ, Lee KG, Lee SJ, Oh YJ, Park YM. A Disposable and Multi-Chamber Film-Based PCR Chip for Detection of Foodborne Pathogen. SENSORS 2018; 18:s18093158. [PMID: 30235826 PMCID: PMC6165562 DOI: 10.3390/s18093158] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/16/2018] [Accepted: 09/18/2018] [Indexed: 12/01/2022]
Abstract
Since the increment of the threat to public health caused by foodborne pathogens, researches have been widely studied on developing the miniaturized detection system for the on-site pathogen detection. In the study, we focused on the development of portable, robust, and disposable film-based polymerase chain reaction (PCR) chip containing a multiplex chamber for simultaneous gene amplification. In order to simply fabricate and operate a film-based PCR chip, different kinds of PCR chambers were designed and fabricated using polyethylene terephthalate (PET) and polyvinyl chloride (PVC) adhesive film, in comparison with commercial PCR, which employs a stereotyped system at a bench-top scale. No reagent leakage was confirmed during the PCR thermal cycling using the film PCR chip, which indicates that the film PCR chip is structurally stable for rapid heat cycling for DNA amplification. Owing to use of the thin film to fabricate the PCR chip, we are able to realize fast thermal transfer from the heat block that leads to short PCR amplification time. Moreover, using the film PCR chip, we could even amplify the target pathogen with 10 CFU mL−1. The artificially infected milk with various concentration of Bacillus cereus was successfully amplified on a single film PCR chip. On the basis of the reliable results, the developed film PCR chip could be a useful tool as a POCT device to detect foodborne pathogens via genetic analysis.
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Affiliation(s)
- Nam Ho Bae
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Korea.
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Sun Young Lim
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Younseong Song
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Soon Woo Jeong
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Seol Yi Shin
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Yong Tae Kim
- Department of Chemical Engineering & Biotechnology, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si 15073, Gyeonggi-do, Korea.
| | - Tae Jae Lee
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Kyoung G Lee
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Seok Jae Lee
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Yong-Jun Oh
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Korea.
| | - Yoo Min Park
- Nano-Bio Application Team, National NanoFab Center (NNFC), 291 Deahak-ro, Yuseong-gu, Daejeon 34141, Korea.
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Bong JH, Song HW, Kim TH, Kang MJ, Jose J, Pyun JC. Refolding of autodisplayed anti-NEF scFv through oxidation with glutathione for immunosensors. Biosens Bioelectron 2018; 102:600-609. [DOI: 10.1016/j.bios.2017.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 11/12/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022]
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