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Huang P, Shang A, Liu D, Xi J. Utilization of a lateral flow colloidal gold immunoassay strip based on surface-enhanced Raman spectroscopy for rapid detection of glycinin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122407. [PMID: 36780742 DOI: 10.1016/j.saa.2023.122407] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 01/15/2023] [Accepted: 01/22/2023] [Indexed: 06/18/2023]
Abstract
Glycinin is an important storage protein in soybean, but it can also lead to allergic reactions in humans. In this study, based on a low-cost, simple, rapid and portable lateral flow immunoassay test strip, combined with high sensitivity surface enhanced Raman spectroscopy (SERS) technology, a sandwich lateral flow immunochromatographic test strip for rapid detection of soybean allergen glycinin is established. In the experiment, colloidal gold was covalently conjugated with rabbit-derived polyclonal antibodies of glycinin and Raman probe molecule 4-aminothiophenol(4-PATP) to prepare the immunoprobe. The respective optimal PATP and optimal antibody labeling amounts of colloidal gold solution were 1.05 × 10-2mol/L and 4.6 × 10-8mol/L. The detection limit of the test strip for glycinin was 4.87 ng/mL. The recovery rate ranged from 91 to 107 % and the CV was between 3 and 10 %. The test strip underwent no cross-reaction with β-conglycinin, sesame protein, peanut protein, wheat protein or whey protein. The results of the experiment showed that this method exhibits high sensitivity and specificity.
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Affiliation(s)
- Pengbo Huang
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China
| | - Achen Shang
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China
| | - Deguo Liu
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China
| | - Jun Xi
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China.
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Luo K, Wang Q, Qiu Q, Li X, Jia X, Chen X, Zhang Z, Zheng G, He Z. Simultaneous amplification of exons 18 to 21 of the EGFR gene using 5' tailed primers and a two-stage protocol. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2018; 37:1-19. [PMID: 29337648 DOI: 10.1080/15257770.2017.1375517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Reduction of non-specific amplification and achievement of efficient amplification of multiple gene fragments under the same reaction condition is the basic goal of PCR diagnosis; however, this is often difficult. This study was conducted to establish a highly specific and effective amplification of the epidermal growth factor receptor (EGFR) gene's exons, 18-21, simultaneously. METHODS The 5'-tailed primers were synthesized by adding 10 to 20 bp of a non-specific sequence to the 5'-terminus of sequence-specific primers (tailless primers). The two-stage protocol consisted of 5-10 cycles of a conventional 3-step cycling, which was then followed by 30-35 cycles of two-step cycling. The exons 18-21 of EGFR gene were amplified in 28 non-small cell lung cancer (NSCLC) patients using an optimized PCR that combined 5' tailed primers with a two-stage protocol. RESULTS The 5' tailed primers exhibited a wider range of suitable annealing temperatures, similar range of primer concentration, similar sensitivity, specificity, and reproducibility, as well as a reduced, non-specific amplification compared with the corresponding tailless primers. The amplification of exons 18-21 of EGFR gene in NSCLC patients revealed that a combination of 5' tailed primers with two-stage protocol (optimized PCR) had a similar PCR success rate (P = 0.873) but had significantly reduced non-specific amplification (P <0.001) compared to conventional PCR. CONCLUSION 5' tailed primers exhibited a wider range of suitable annealing temperatures and improved specificity compared with conventional PCR primers. An optimized PCR was established with 5' tailed primers and a two-stage protocol to amplify exons 18-21 of the EGFR gene in NSCLC patients.
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Affiliation(s)
- Kai Luo
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Qian Wang
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Qinwei Qiu
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Xiemengdan Li
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Xiaoting Jia
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Xiaoliang Chen
- b Cancer Research Institute , Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Zhijie Zhang
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Guopei Zheng
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
| | - Zhiming He
- a Cancer Research Institute , Affiliated Cancer Hospital of Guangzhou Medical University , Guangzhu , Guangdong , P.R. China
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Wang Y, Li Z, Pei Y, Li Q, Sun Y, Yang J, Yang Y, Zhi Y, Deng R, Hou Y, Hu X. Establishment of a Lateral Flow Colloidal Gold Immunoassay Strip for the Rapid Detection of Soybean Allergen β-Conglycinin. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0800-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang X, Teng D, Guan Q, Tian F, Wang J. Detection of genetically modified crops using multiplex asymmetric polymerase chain reaction and asymmetric hyperbranched rolling circle amplification coupled with reverse dot blot. Food Chem 2014; 173:1022-9. [PMID: 25466120 DOI: 10.1016/j.foodchem.2014.10.126] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/14/2014] [Accepted: 10/22/2014] [Indexed: 02/04/2023]
Abstract
To meet the ever-increasing demand for detection of genetically modified crops (GMCs), low-cost, high-throughput and high-accuracy detection assays are needed. The new multiplex asymmetric polymerase chain reaction and asymmetric hyper-branched rolling circle amplification coupled with reverse dot blot (RDB) systems were developed to detect GMCs. Thirteen oligonucleotide probes were designed to identify endogenous targets (Lec1, Hmg and Sad1), event-specific targets (RRS-5C, RRS-3C, Bt176-3C and MON810-3C), screening targets (35S promoter and NOS terminator), and control targets (18S and PLX). Optimised conditions were as follows: tailed hybridization probes (1-2 pmol/l) were immobilized on a membrane by baking for 2h, and a 10:1 ratio of forward to reverse primers was used. The detection limits were 0.1 μg/l of 2% RRS and 0.5 ng/l of DNA from genetically modified (GM) soybean. These results indicate that the RDB assay could be used to detect multiplex target genes of GMCs rapidly and inexpensively.
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Affiliation(s)
- Xiumin Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China; Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Da Teng
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China; Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Qingfeng Guan
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China; Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Fang Tian
- Baotou City Health School, Baotou Medical College of Career Technical College, Baotou 014030, China
| | - Jianhua Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China; Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Wang X, Teng D, Guan Q, Tian F, Wang J. Detection of Roundup Ready soybean by loop-mediated isothermal amplification combined with a lateral-flow dipstick. Food Control 2013. [DOI: 10.1016/j.foodcont.2012.06.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Wang X, Teng D, Tian F, Guan Q, Wang J. Comparison of three DNA extraction methods for feed products and four amplification methods for the 5'-junction fragment of Roundup Ready soybean. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:4586-95. [PMID: 22515503 DOI: 10.1021/jf300827q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Three methods of DNA extraction from feed products and four detection methods for the 5'-junction fragment of genetically modified (GM) Roundup Ready soybean (RRS) were compared and evaluated. The DNA extraction methods, including cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and guanidine hydrochloride (Kit), were assessed for their yields and purity of DNA, extraction time, and reagent cost. The DNA yields of CTAB, SDS, and Kit were 52-694, 164-1750 and 23-105 ng/mg sample, and their extraction time was 2.5-3, 2-2.5, and 1.5-2 h with reagent cost about US dollar 0.24, 0.13, and 1.9 per extraction, respectively. The SDS method was generally well suited to all kinds of feed matrices tested. The limits of detection for the four amplification protocols, including loop-mediated isothermal amplification (LAMP), hyperbranched rolling circle amplification (HRCA), conventional polymerase chain reaction (PCR), and real-time PCR, were 48.5, 4.85, 485, and 9 copies of the pTLH10 plasmid, respectively. The ranked results of the four detection methods were based on multiattribute utility theory as follows (from best to worse): HRCA, LAMP, PCR, and real-time PCR. This comparative evaluation was specifically useful for selection of a highly efficient DNA extraction or amplification method for detecting different GM ingredients.
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Affiliation(s)
- Xiumin Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, PR China
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