2021
DOI: 10.1016/j.bios.2021.113168
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Sensitive electrochemical biosensor combined with isothermal amplification for point-of-care COVID-19 tests

Abstract: We report an electrochemical biosensor combined with recombinase polymerase amplification (RPA) for rapid and sensitive detection of severe acute respiratory syndrome coronavirus 2. The electrochemical biosensor based on a multi-microelectrode array allows the detection of multiple target genes by differential pulse voltammetry. The RPA reaction involves hybridization of the RPA amplicon with thiol-modified primers immobilized on the working electrodes, which leads to a reduction of current density as amplicon… Show more

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Cited by 90 publications
(52 citation statements)
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“…More than 40% of the published results in 2020 used lateral flow based detection of RPA amplicons. Nevertheless CRISPR-Cas based systems 12 are used in the same way like colorimetric assays 13 , gel electrophoresis 10 , electrochemical detection systems 14 , 15 and microarray based techniques 16 .…”
Section: Introductionmentioning
confidence: 99%
“…More than 40% of the published results in 2020 used lateral flow based detection of RPA amplicons. Nevertheless CRISPR-Cas based systems 12 are used in the same way like colorimetric assays 13 , gel electrophoresis 10 , electrochemical detection systems 14 , 15 and microarray based techniques 16 .…”
Section: Introductionmentioning
confidence: 99%
“…However, a relatively long analysis time of at least 3 h and the need for professional experts with sophisticated analysis procedures limit the rapid screening of samples in large quantities [207]. Hence, the development of a new type of biosensor with a POCT platform is imperative for the detection of viral species to prevent the spread of SARS-CoV-2 by isolating patients [208][209][210][211][212]. Step-like response transitions upon the increasing concentration of IgG with the limit of detection of 1 ng/mL in the inset.…”
Section: Biosensorsmentioning
confidence: 99%
“…Other research attempts supported the role of various technological arrangements as POCT. For instance, the combination of electrochemical biosensors and the recombinase polymerase amplification (RPA) assay is a rapid, sensitive and convenient platform that can be potentially used as a Point-of-Care test to diagnose COVID-19 [208]. The combination worked without expensive thermo-cycling equipment and allowed the detection of multiple genes by differential pulse voltammetry, which was possible because of the hybridisation of the RPA amplicon with modified primers followed by amplicons' build-up.…”
Section: Point Of Care Testing (Poct)mentioning
confidence: 99%