数字农科院2.0

Disposable and instrument-free nucleic acid lateral flow cassette for rapid and on-site identification of adulterated goat milk

文献类型： 外文期刊

作者： Wang N.;Zhang J.;Xiao B.;Sun X.;Huang F.;Chen A.

作者机构：

关键词： Goat milk;Lateral flow strips;Loop-mediated isothermal amplification;Microfluidics;Rapid on-site detection

期刊名称： Talanta

ISSN： 0039-9140

年卷期： 2024 年 267 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Species identification has become a significant concern due to the growing use of food alternatives that may cause allergies and reduce nutritional value. To address the issue of fraudulent adulteration of goat milk products with cow milk, we have developed an affordable, portable, and user-friendly platform called microfluidic-integrated nucleic acid lateral flow strips (LFS). This platform enables simultaneous detection of components derived from both goats and cows in goat milk. In this study, we have introduced an innovative nucleic acid labeling method. The loop primers of loop-mediated isothermal amplification (LAMP) have been modified with amplification terminator spacer C3 and an oligonucleotide sequence, thus eliminating the requirement for costly antibodies in traditional nucleic acid LFS. This modification not only lowers costs but also enables multiple detections. Additionally, we have integrated the LAMP and LFS assay steps into a microfluidic chip, allowing convenient on-site detection while effectively preventing aerosol contamination of LAMP products. The testing process includes rapid DNA extraction, followed by a short nucleic acid addition and incubation for visualized results in about 50 min. This platform is user-friendly, requiring no specialized equipment or extensive training, making it suitable for rapid on-site detection of dairy products by personnel in diverse fields. © 2023 Elsevier B.V.

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