Amplification‐Free Detection of SARS‐CoV‐2 and Respiratory Syncytial Virus Using CRISPR Cas13a and Graphene Field‐Effect Transistors
Angewandte Chemie
; 134(32), 2022.
Article
in English
| ProQuest Central | ID: covidwho-1981566
ABSTRACT
The clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR‐associated (Cas) systems have recently received notable attention for their applications in nucleic acid detection. Despite many attempts, the majority of current CRISPR‐based biosensors in infectious respiratory disease diagnostic applications still require target preamplifications. This study reports a new biosensor for amplification‐free nucleic acid detection via harnessing the trans‐cleavage mechanism of Cas13a and ultrasensitive graphene field‐effect transistors (gFETs). CRISPR Cas13a‐gFET achieves the detection of SARS‐CoV‐2 and respiratory syncytial virus (RSV) genome down to 1 attomolar without target preamplifications. Additionally, we validate the detection performance using clinical SARS‐CoV‐2 samples, including those with low viral loads (Ct value >30). Overall, these findings establish our CRISPR Cas13a‐gFET among the most sensitive amplification‐free nucleic acid diagnostic platforms to date.
Chemistry; Amplification-Free Detection; Biosensors; CRISPR Cas13a; Graphene Field-Effect Transistors; SARS-CoV-2; Respiratory diseases; Transistors; Viruses; Nucleic acids; Graphene; CRISPR; Genomes; Severe acute respiratory syndrome; Amplification; Severe acute respiratory syndrome coronavirus 2; Semiconductor devices; Viral diseases; Diagnostic software
Full text:
Available
Collection:
Databases of international organizations
Database:
ProQuest Central
Type of study:
Experimental Studies
Language:
English
Journal:
Angewandte Chemie
Year:
2022
Document Type:
Article
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