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González-González E, Lara-Mayorga IM, Rodríguez-Sánchez IP, Zhang YS, Martínez-Chapa SO, Santiago GTD, Alvarez MM. Colorimetric loop-mediated isothermal amplification (LAMP) for cost-effective and quantitative detection of SARS-CoV-2: the change in color in LAMP-based assays quantitatively correlates with viral copy number. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:169-178. [PMID: 33399137 DOI: 10.1039/d0ay01658f] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We demonstrate a loop-mediated isothermal amplification (LAMP) method to detect and amplify SARS-CoV-2 genetic sequences using a set of in-house designed initiators that target regions encoding the N protein. We were able to detect and amplify SARS-CoV-2 nucleic acids in the range of 62 to 2 × 105 DNA copies by this straightforward method. Using synthetic SARS-CoV-2 samples and RNA extracts from patients, we demonstrate that colorimetric LAMP is a quantitative method comparable in diagnostic performance to RT-qPCR (i.e., sensitivity of 92.85% and specificity of 81.25% in a set of 44 RNA extracts from patients analyzed in a hospital setting).
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Affiliation(s)
- Everardo González-González
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico. and Departamento de Bioingeniería, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico
| | - Itzel Montserrat Lara-Mayorga
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico. and Departamento de Ingeniería Mecátrónica y Eléctrica, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico
| | - Iram Pablo Rodríguez-Sánchez
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Biológicas, Laboratorio de Fisiología Molecular y Estructural, 66455, San Nicolás de los Garza, NL, Mexico and Alfa Medical Center, Guadalupe, CP 67100, NL, Mexico
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge 02139, MA, USA
| | - Sergio O Martínez-Chapa
- Departamento de Ingeniería Mecátrónica y Eléctrica, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico
| | - Grissel Trujillo-de Santiago
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico. and Departamento de Ingeniería Mecátrónica y Eléctrica, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico
| | - Mario Moisés Alvarez
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico. and Departamento de Bioingeniería, Tecnologico de Monterrey, CP 64849, Monterrey, NL, Mexico
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