Journal
ANALYTICA CHIMICA ACTA
Volume 1132, Issue -, Pages 28-35Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.07.058
Keywords
Staphylococcus aureus; Foodborne pathogen; Aptamer; Fluorescence analysis; Nucleic acids probes
Categories
Funding
- National Natural Science Foundation of China [21804095]
- Green Manufacturing Project of Ministry of Industry and Information Technology of China
- China Postdoctoral Science Foundation [2018M631079]
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Staphylococcus aureus (S. aureus) causes serious food-borne diseases, and tools able to directly profile intact S. aureus would greatly facilitate food safety and public health. Herein, we proposed a biosensing platform for culture-independent and separation-free profiling S. aureus, thus allow us to directly detect intact S. aureus in complex samples. The binding protection effect of aptamer-cell complex was introduced to construct the aptasensor, and it allowed to eliminate the optimization of aptamer probe sequences. The proposed aptasensor, terms enzymatic cleavage aptasensor could achieve a sensitive (a detection limit of 64 CFU/mL) and broad-concentration quantification (dynamic range 10(2)-10(7) CFU/mL) of S. aureus. Furthermore, it could specifically identify intact S. aureus in complex samples, and the quantifying of S. aureus was achieved in tap water, milk and porker with high precision. Therefore, enzymatic cleavage aptasensor could be a good candidate for on-site biosensing platform of S. aureus, as well as other pathogens by replacing the aptamer sequences. (C) 2020 Elsevier B.V. All rights reserved.
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