A Lateral Flow Test for Staphylococcus aureus in Nasal Mucus Using a New DNAzyme as the Recognition Element.
Angew Chem Int Ed Engl
; 61(3): e202112346, 2022 01 17.
Article
em En
| MEDLINE
| ID: mdl-34816559
ABSTRACT
Detection of pathogenic bacteria in complex biological matrices remains a major challenge. Herein, we report the selection and optimization of a new DNAzyme for Staphylococcus aureus (SA) and the use of the DNAzyme to develop a simple lateral flow device (LFD) for detection of SA in nasal mucus. The DNAzyme was generated by in vitro selection using a crude extra/intracellular mixture derived from SA, which could be used directly for simple solution or paper-based fluorescence assays for SA. The DNAzyme was further modified to produce a DNA cleavage fragment that acted as a bridging element to bind DNA-modified gold nanoparticles to the test line of a LFD, producing a simple colorimetric dipstick test. The LFD was evaluated with nasal mucus samples spiked with SA, and demonstrated that SA detection was possible in minutes with minimal sample processing.
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Base de dados:
MEDLINE
Assunto principal:
Staphylococcus aureus
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Técnicas Biossensoriais
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DNA Catalítico
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Muco
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Cavidade Nasal
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article