1
|
Arnaiz A, Guirado-Moreno JC, Guembe-García M, Barros R, Tamayo-Ramos JA, Fernández-Pampín N, García JM, Vallejos S. Lab-on-a-chip for the easy and visual detection of SARS-CoV-2 in saliva based on sensory polymers. Sens Actuators B Chem 2023; 379:133165. [PMID: 36536612 PMCID: PMC9751010 DOI: 10.1016/j.snb.2022.133165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
The initial stages of the pandemic caused by SARS-CoV-2 showed that early detection of the virus in a simple way is the best tool until the development of vaccines. Many different tests are invasive or need the patient to cough up or even drag a sample of mucus from the throat area. Besides, the manufacturing time has proven insufficient in pandemic conditions since they were out of stock in many countries. Here we show a new method of manufacturing virus sensors and a proof of concept with SARS-CoV-2. We found that a fluorogenic peptide substrate of the main protease of the virus (Mpro) can be covalently immobilized in a polymer, with which a cellulose-based material can be coated. These sensory labels fluoresce with a single saliva sample of a positive COVID-19 patient. The results matched with that of the antigen tests in 22 of 26 studied cases (85% success rate).
Collapse
Affiliation(s)
- Ana Arnaiz
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
- Universidad Politécnica de Madrid, Calle Ramiro de Maeztu, 7, 28040 Madrid, Spain
| | - José Carlos Guirado-Moreno
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Marta Guembe-García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Rocio Barros
- International Research Center in Critical Raw Materials for Advanced Industrial Technologies (ICCRAM), R&D Center, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Juan Antonio Tamayo-Ramos
- International Research Center in Critical Raw Materials for Advanced Industrial Technologies (ICCRAM), R&D Center, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Natalia Fernández-Pampín
- International Research Center in Critical Raw Materials for Advanced Industrial Technologies (ICCRAM), R&D Center, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - José M García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Saúl Vallejos
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain
| |
Collapse
|
2
|
Guirado-Moreno JC, González-Ceballos L, Carreira-Barral I, Ibeas S, Fernández-Muiño MA, Teresa Sancho M, García JM, Vallejos S. Smart sensory polymer for straightforward Zn(II) detection in pet food samples. Spectrochim Acta A Mol Biomol Spectrosc 2023; 284:121820. [PMID: 36116204 DOI: 10.1016/j.saa.2022.121820] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/29/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
We report on an innovative method to measure the Zn(II) concentration in commercial pet food samples, both wet and dry food. It is based on a colorimetric sensory polymer prepared from commercial monomers and 0.5 % of a synthetic monomer having a quinoline sensory core (N-(8-(2-azidoacetamido)quinolin-5-yl)methacrylamide). We obtained the sensory polymer as crosslinked films by thermally initiated bulk radical polymerization of the monomers of 100 μm thickness, which we punched into Ø6 mm sensory discs. The immersion of the discs in water solutions containing Zn(II) turned the fluorescence on, allowing for the titration of this cation using the G parameter of a digital picture taken to the discs. The limits of detection and quantification were 29 and 87 µg/L, respectively. Furthermore, we measured the concentration of Zn(II) even in the presence of other cations, detecting no significant interferences. Thus, in a further step, we obtained the concentration of Zn(II) from 15 commercial pet food samples, ranging from 19 to 198 mg/kg, following a simple extraction procedure and contacting the extractant with our sensory discs. These results were contrasted with that obtained by ICP-MS as a reference method.
Collapse
Affiliation(s)
- José Carlos Guirado-Moreno
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Lara González-Ceballos
- Departamento de Biotecnología y Ciencia de los Alimentos, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Israel Carreira-Barral
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Saturnino Ibeas
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Miguel A Fernández-Muiño
- Departamento de Biotecnología y Ciencia de los Alimentos, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - M Teresa Sancho
- Departamento de Biotecnología y Ciencia de los Alimentos, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - José M García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - Saúl Vallejos
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
| |
Collapse
|