Autor segons l'article: Ortiz, Mayreli; Jauset-Rubio, Miriam; Skouridou, Vasso; Machado, Diana; Viveiros, Miguel; Clark, Taane G; Simonova, Anna; Kodr, David; Hocek, Michal; O'Sullivan, Ciara K
Departament: Enginyeria Química
Autor/s de la URV: Jauset Rubio, Miriam / O'SULLIVAN, CIARA KATHLEEN / Ortíz Rodríguez, Mayreli / Skouridou, Vasoula
Paraules clau: Solid-phase primer elongation Solid-phase Solid phasis Single-point mutation Single-nucleotide polymorphism (snp) Single-nucleotide polymorphism Single nucleotide polymorphisms Rifampin Polymorphism, single nucleotide Polymorphism Oxidation-reduction Organometallics Oligonucleotides Nucleoside triphosphates Mycobacterium tuberculosis Metallocenes Klenow (exo-) dna polymerase Iron compounds Ferrocene-labeled nucleotides Ferrocene-labeled nucleotide Ferrocene labelled Elongation Electrodes Dna polymerase Dna Cost effectiveness Chemical detection
Resum: Here, we report the electrochemical detection of single-point mutations using solid-phase isothermal primer elongation with redox-labeled oligonucleotides. A single-base mutation associated with resistance to rifampicin, an antibiotic commonly used for the treatment of Mycobacterium tuberculosis, was used as a model system to demonstrate a proof-of-concept of the approach. Four 5?-thiolated primers, designed to be complementary with the same fragment of the target sequence and differing only in the last base, addressing the polymorphic site, were self-assembled via chemisorption on individual gold electrodes of an array. Following hybridization with single-stranded DNA, Klenow (exo-) DNA polymerase-mediated primer extension with ferrocene-labeled 2?-deoxyribonucleoside triphosphates (dNFcTPs) was only observed to proceed at the electrode where there was full complementarity between the surface-tethered probe and the target DNA being interrogated. We tested all four ferrocenylethynyl-linked dNTPs and optimized the ratio of labeled/natural nucleotides to achieve maximum sensitivity. Following a 20 min hybridization step, Klenow (exo-) DNA polymerase-mediated primer elongation at 37 °C for 5 min was optimal for the enzymatic incorporation of a ferrocene-labeled nucleotide, achieving unequivocal electrochemical detection of a single-point mutation in 14 samples of genomic DNA extracted from Mycobacterium tuberculosis strains. The approach is rapid, cost-effective, facile, and can be extended to multiplexed electrochemical single-point mutation genotyping. © 2021 The Authors. Published by American Chemical Society.
Àrees temàtiques: Process chemistry and technology Nanoscience & nanotechnology Instrumentation Fluid flow and transfer processes Engenharias iii Chemistry, multidisciplinary Chemistry, analytical Bioengineering
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: vasoula.skouridou@urv.cat mayreli.ortiz@urv.cat miriam.jauset@urv.cat mayreli.ortiz@urv.cat
Identificador de l'autor: 0000-0002-9712-5429 0000-0002-9423-0055 0000-0002-9943-6132 0000-0002-9423-0055
Data d'alta del registre: 2024-10-12
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://pubs.acs.org/doi/10.1021/acssensors.1c01710
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Acs Sensors. 6 (12): 4398-4407
Referència de l'ítem segons les normes APA: Ortiz, Mayreli; Jauset-Rubio, Miriam; Skouridou, Vasso; Machado, Diana; Viveiros, Miguel; Clark, Taane G; Simonova, Anna; Kodr, David; Hocek, Michal; (2021). Electrochemical Detection of Single-Nucleotide Polymorphism Associated with Rifampicin Resistance in Mycobacterium tuberculosis Using Solid-Phase Primer Elongation with Ferrocene-Linked Redox-Labeled Nucleotides. Acs Sensors, 6(12), 4398-4407. DOI: 10.1021/acssensors.1c01710
DOI de l'article: 10.1021/acssensors.1c01710
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2021
Tipus de publicació: Journal Publications