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A nanomaterial-free and thionine labeling-based lateral flow immunoassay for rapid and visual detection of the transgenic CP4-EPSPS protein

文献类型： 外文期刊

作者： Wang, Jinbin 1 ; Yang, Qianwen 1 ; Liu, Hua 1 ; Chen, Yifan 1 ; Jiang, Wei 1 ; Wang, Yu 1 ; Zeng, Haijuan 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Biotechnol Res Inst, Key Lab Agr Genet & Breeding, Shanghai 201106, Peoples R China

2.Minist Agr & Rural Affairs, Crops Ecol Environm Secur Inspect & Supervis Ctr, Shanghai 201106, Peoples R China

3.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou 730050, Peoples R China

关键词： Lateral flow immunoassays; Thionine-labeling; CP4-EPSPS protein; Genetically modified crops

期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）

ISSN： 0308-8146

年卷期： 2022 年 378 卷

页码：

收录情况： SCI

摘要： Nanomaterial-based lateral flow immunoassays (LFIAs) have been widely used for the on-site detection of genetically modified components. However, the practical applications are often limited by the complex matrix, such as in red samples. In this study, a thionine (Thi) labeling-based LFIA was developed for the first time to detect CP4-EPSPS protein. The optimal labeling concentration of Thi was 0.5 mg/mL, and the antibody could be rapidly coupled to Thi in 10 min. The visual limit of detection (vLOD) levels for transgenic soybean, sugar beet, and cotton containing the CP4-EPSPS protein reached 0.05%, 0.1%, and 0.1%, respectively, and had no interference from other proteins. After storage at 4 degrees C for three months, the LFIA sensitivity remained unchanged and showed good stability. This method could be used to screen and detect a variety of transgenic crops containing the CP4-EPSPS protein, and the results were consistent with the current standard assay. This study pioneered the development of an immunochromatographic method using Thi as a marker and applied it to the detection of the CP4-EPSPS protein in herbicide-tolerant transgenic crops. This provides a new method for the rapid immunoassay of Thi as a dye and has good prospects for practical application.

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