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Dual-site ligation-assisted loop-mediated isothermal amplification (dLig-LAMP) for colorimetric and point-of-care determination of real SARS-CoV-2

A probing system has been developed based on dual-site ligation-assisted loop-mediated isothermal amplification (dLig-LAMP) for the selective colorimetric detection of SARS-CoV-2. This approach can induce false-positive and -negative detection in real clinical samples; dLig-LAMP operates with improv...

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Detalles Bibliográficos
Autores principales: Choi, Moon Hyeok, Lee, Jaehyeon, Seo, Young Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Vienna 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8982663/
https://www.ncbi.nlm.nih.gov/pubmed/35381892
http://dx.doi.org/10.1007/s00604-022-05293-7
Descripción
Sumario:A probing system has been developed based on dual-site ligation-assisted loop-mediated isothermal amplification (dLig-LAMP) for the selective colorimetric detection of SARS-CoV-2. This approach can induce false-positive and -negative detection in real clinical samples; dLig-LAMP operates with improved selectivity. Unlike RT-LAMP, the selectivity of dLig-LAMP is determined in both the ligation and primer binding steps, not in the reverse transcription step. With this selective system in hand, we developed a colorimetric signaling system for point-of-care detection. We also developed a colorimetric probe for sensing pyrophosphate, which arises as a side product during the LAMP DNA amplification. Thus, dLig-LAMP appears to be an alternative method for improving the selectivity problems associated with reverse transcription. In addition, combining dLig-LAMP with colorimetric pyrophosphate probing allows point-of-care detection of SARS-CoV-2 within 1 h with high selectivity. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00604-022-05293-7.