SARS-CoV-2 viral RNA detection using the novel CoVradar device associated with the CoVreader smartphone app.
Biosens Bioelectron
; 230: 115268, 2023 Jun 15.
Artículo
en Inglés
| MEDLINE | ID: covidwho-2299647
ABSTRACT
The COVID-19 pandemic has highlighted the need for innovative approaches to its diagnosis. Here we present CoVradar, a novel and simple colorimetric method that combines nucleic acid analysis with dynamic chemical labeling (DCL) technology and the Spin-Tube device to detect SARS-CoV-2 RNA in saliva samples. The assay includes a fragmentation step to increase the number of RNA templates for analysis, using abasic peptide nucleic acid probes (DGL probes) immobilized to nylon membranes in a specific dot pattern to capture RNA fragments. Duplexes are formed by labeling complementary RNA fragments with biotinylated SMART bases, which act as templates for DCL. Signals are generated by recognizing biotin with streptavidin alkaline phosphatase and incubating with a chromogenic substrate to produce a blue precipitate. CoVradar results are analysed by CoVreader, a smartphone-based image processing system that can display and interpret the blotch pattern. CoVradar and CoVreader provide a unique molecular assay capable of detecting SARS-CoV-2 viral RNA without the need for extraction, preamplification, or pre-labeling steps, offering advantages in terms of time (â¼3 h/test), cost (â¼1/test manufacturing cost) and simplicity (does not require large equipment). This solution is also promising for developing assays for other infectious diseases.
Palabras clave
Texto completo:
Disponible
Colección:
Bases de datos internacionales
Base de datos:
MEDLINE
Asunto principal:
Técnicas Biosensibles
/
Aplicaciones Móviles
/
COVID-19
Tipo de estudio:
Estudios diagnósticos
Límite:
Humanos
Idioma:
Inglés
Revista:
Biosens Bioelectron
Asunto de la revista:
Biotecnologia
Año:
2023
Tipo del documento:
Artículo
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