Mutations in microRNA-128-2-3p identified with amplification-free hybridization assay.

Slott, Sofie; Krüger-Jensen, Cecilie Schiøth; Ferreira da Silva, Izabela; Pedersen, Nadia Bom; Astakhova, Kira · PLoS One · 2023

basic_science · Level V

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Abstract

We describe a quantitative detection method for mutated microRNA in human plasma samples. Specific oligonucleotides designed from a Peyrard-Bishop model allowed accurate prediction of target:probe recognition affinity and specificity. Our amplification-free tandem bead-based hybridization assay had limit of detection of 2.2 pM. Thereby, the assay allowed identification of single-nucleotide polymorphism mismatch profiles in clinically relevant microRNA-128-2-3p, showing terminal mutations that correlate positively with inflammatory colitis and colorectal cancer.

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