| Literature DB >> 30502145 |
Kefeng Wu1, Changbei Ma2, Han Zhao3, Mingjian Chen4, Zhiyi Deng5.
Abstract
A new assay for the selective and sensitive aptamer-based fluorescent biosensor for ochratoxin A (OTA) detection is proposed. It consists of a ribonuclease H (RNase H)-assisted cycle response that leads to a significant amplification of the signal, which allow for a low limit of detection (LOD) of 0.08 ng/mL. By using this technique, a high selectivity for OTA against ochratoxin B and aflatoxin B1 (AFB1) was noticed. The quantitative determination in real samples has been verified using red wine samples spiked with a series of OTA concentrations (0.4, 4, and 12 ng/mL), and the recoveries ranged from 96.1 to 107.5%. This aptasensor has great practical applications in food industry and moreover, can be extended for the detection of other toxins by replacing the sequence of the recognition aptamer.Entities:
Keywords: Fluorescence; Ochratoxin A; RNase H; Signal amplification
Mesh：
Substances：
Year: 2018 PMID： 30502145 DOI： 10.1016/j.foodchem.2018.10.130
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514