RT Journal Article T1 Novel bead-based platform for direct detection of unlabelled nucleic acids through Single Nucleobase Labelling. A1 Venkateswaran, Seshasailam A1 Luque-González, Maria Angélica A1 Tabraue-Chávez, Mavys A1 Fara, Mario Antonio A1 López-Longarela, Barbara A1 Cano-Cortes, Victoria A1 López-Delgado, Francisco Javier A1 Sánchez-Martín, Rosario María A1 Ilyine, Hugh A1 Bradley, Mark A1 Pernagallo, Salvatore A1 Díaz-Mochón, Juan José K1 Dynamic chemistry K1 Magnetic microspheres K1 MicroRNA (miRNA) K1 Nucleic acid K1 Nucleic acid test (NAT) K1 Peptide nucleic acid (PNA) K1 Single Nucleobase Labelling (SNL) AB Over the last decade, circulating microRNAs have received attention as diagnostic and prognostic biomarkers. In particular, microRNA122 has been demonstrated to be an early and more sensitive indicator of drug-induced liver injury than the widely used biomarkers such as alanine aminotransferase and aspartate aminotransferase. Recently, microRNA122 has been used in vitro to assess the cellular toxicity of new drugs and as a biomarker for the development of a rapid test for drug overdose/liver damage. In this proof-of-concept study, we report a PCR-free and label-free detection method that has a limit of detection (3 standard deviations) of 15 fmoles of microRNA122, by integrating a dynamic chemical approach for "Single Nucleobase Labelling" with a bead-based platform (Luminex®) thereby, in principle, demonstrating the exciting prospect of rapid and accurate profiling of any microRNAs related to diseases and toxicology. YR 2016 FD 2016-08-31 LK http://hdl.handle.net/10668/10554 UL http://hdl.handle.net/10668/10554 LA en DS RISalud RD Apr 9, 2025