Journal
TALANTA
Volume 214, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2020.120818
Keywords
Vibrio parahaemolyticus; Polymerase chain reaction; CRISPR/Cas12a; Visualized detection; Thermal cycler; On-site detection
Categories
Funding
- Key Research & Development Programs in Yunnan province [2018BC005]
- Project of the Science and Technology Department of Zhejiang Province of China [LGN19C010001]
- Medical Health Science and Technology Project of Zhejiang [2017KY571]
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Vibrio parahaemolyticus is a major cause of seafood-associated food poisoning. It is of great significance to develop an accurate, simple and cost-effective method to identify infected seafood, especially for on-site application. Polymerase chain reaction (PCR) remains the golden standard for nucleic acid detection. But traditional methods heavily reply on sophisticated instrument and specialized operators, which limits the application for on-site detections. Here we developed a novel, specific and visualized detection method for PCR based on CRISPR/Cas12a system. On a low-cost thermal cycler, amplification reaction can be conducted easily. The CRISPR/Cas12a system was specifically designed to evaluate amplicons, eliminating false positive results. Besides the negative samples remained colorless, the positive samples generated obvious green fluorescence, which could be easily distinguished by the naked eye using a homemade UV device. The presented detection method was verified by detecting shrimp samples. The limit of detection is 1.02 x 10(2) copies/mu L. This presented method provided a new strategy for specific endpoint detection of PCR and advanced its application in field for food safety assurance.
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