Rapid and Simple Detection of Ochratoxin A using Fluorescence Resonance Energy Transfer on Lateral Flow Immunoassay (FRET-LFI)

被引:18
作者
Oh, Hyun-Kyung [1 ]
Joung, Hyou-Arm [2 ]
Jung, Minhyuk [1 ]
Lee, Hohjai [1 ]
Kim, Min-Gon [1 ,3 ]
机构
[1] Gwangju Inst Sci & Technol, Dept Chem, 123 Cheomdangawgi Ro, Gwangju 61005, South Korea
[2] Univ Calif Los Angeles, Elect & Comp Engn Dept, Los Angeles, CA 90095 USA
[3] INGIbio Co Ltd, R&D Ctr, 206,APRI,123 Cheomdangawgi Ro, Gwangju 61005, South Korea
来源
TOXINS | 2019年 / 11卷 / 05期
基金
新加坡国家研究基金会;
关键词
ochratoxin A (OTA); mycotoxin; fluorescence resonance energy transfer (FRET); lateral flow immunoassay (LFI); label-free; matrix effect; IMMUNOCHROMATOGRAPHIC ASSAY; LABEL-FREE; MYCOTOXINS; STRIP; MS;
D O I
10.3390/toxins11050292
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The detection of mycotoxins is crucial because of their toxicity in plants, animals, and humans. It is very important to determine whether food products are contaminated with mycotoxins such as ochratoxin A (OTA), as mycotoxins can survive heat treatments and hydrolysis. In this study, we designed a fluorescence resonance energy transfer (FRET)-based system that exploits antibody-antigen binding to detect mycotoxins more rapidly and easily than other currently available methods. In addition, we were able to effectively counteract the matrix effect in the sample by using a nitrocellulose membrane that enabled fluorescence measurement in coffee samples. The developed FRET on lateral flow immunoassay (FRET-LFI) system was used to detect OTA at a limit of detection (LOD) of 0.64 ng.mL(-1), and the test can be completed in only 30 min. Moreover, OTA in coffee samples was successfully detected at a LOD of 0.88 ng.mL(,)(-1) overcoming the matrix effect, owing to the chromatographic properties of the capillary force of the membrane. We believe that the developed system can be used as a powerful tool for the sensitive diagnosis of harmful substances such as mycotoxins and pesticides for environmental and food quality control monitoring.
引用
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页数:9
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