CRISPR-based platform for carbapenemases and emerging viruses detection using Cas12a (Cpf1) effector nuclease.
Emerg Microbes Infect
; 9(1): 1140-1148, 2020 Dec.
Article
em En
| MEDLINE
| ID: mdl-32486913
CRISPR-Cas12a (also called Cpf1) has been commonly used for genomic editing, based on its ability to generate precise double-stranded DNA (dsDNA) breaks. Recently, it was demonstrated that Cas12a exhibits unspecific ssDNAse activity upon target recognition. This feature allows CRISPR-Cas to be coupled with a ssDNA reporter and generate a fast, accurate and ultrasensitive molecular detection method. Here, we demonstrate that Cas12a was able to detect DNA target sequences corresponding to carbapenemases resistance genes such as KPC, NDM and OXA. Also, with the addition of a reverse-transcription step, we were able to detect viral RNA sequences from DENV, ZIKV and HANTV genomes. In all cases, assay run time was less than two hours. Additionally, we report attomolar levels of detection. This methodology was validated using clinical samples from patients infected with Dengue virus. Reactions were visualized by detection of a fluorescent signal, as well as by the use of a simple lateral flow strip. These results indicate that Cas12a is able to detect both DNA and RNA targets, making it an appropriate and convenient tool to detect all types of pathogens.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vírus de RNA
/
Proteínas de Bactérias
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Beta-Lactamases
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Farmacorresistência Bacteriana
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Endodesoxirribonucleases
/
Proteínas Associadas a CRISPR
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Sistemas CRISPR-Cas
/
Edição de Genes
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
Emerg Microbes Infect
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Estados Unidos