Direct Detection of miR-122 in Hepatotoxicity Using Dynamic Chemical Labeling Overcomes Stability and isomiR Challenges

Citation: Analytical Chemistry, 2020, doi: 10.1021/acs.analchem.9b05449 Abstract Circulating microRNAs are biomarkers reported to be stable and translational across species. MicroRNA-122 (miR-122) is a hepatocyte-specific microRNA biomarker for drug-induced liver injury (DILI). We developed a single molecule, dynamic chemical labeling (DCL) assay to directly detect miR-122 in blood. The DCL assay specifically measured miR-122 directly from 10…

Smartphone-Based Diagnosis of Parasitic Infections With Colorimetric Assays in Centrifuge Tubes

Citation: IEEE Access, 2019, 7, 185677 – 185686 DOI:10.1109/ACCESS.2019.2961230 Abstract A smartphone-based platform for the diagnosis of parasitic infections has been developed, tested and validated. The system is capable of making automatic and accurate analysis of millimetric colorimetric arrays in centrifuge collection tubes, which are well established tools used in clinical analysis. To that end, an Android-based…

miR-122 direct detection in human serum by time-gated fluorescence imaging

Citation: Chem. Commun., 2019, 55, 14958-14961 Abstract A simple method for direct detection of microRNAs (miRs) in human serum without the use of polymerase amplification is presented, achieving low miR-122 concentrations and importantly, discerning effectively single-base sequence mutations. The method is based on the capture of target miRs with synthetic peptide nucleic acid oligomers, dynamic chemical labelling,…

PCR-free and chemistry-based technology for miR-21 rapid detection directly from tumour cells

Citation: Talanta, 2019, 51-56 Abstract miRNAs are well known for being implicated in a myriad of biological situations, including those related to serious diseases. Amongst miRNAs, miRNA-21 has the spotlight as it is reported to be up-regulated in multiple severe pathological conditions, being its quantification a key point in medicine. To date, most of the techniques for miRNA quantification…

New Platform for the Direct Profiling of microRNAs in Biofluids

Citation: Anal. Chem., 2019, 91 (9), 5874–5880 Abstract Circulating microRNAs have been identified as potential biomarkers for early detection, prognosis, and prediction of several diseases. Their use in clinical diagnostics has been limited by the lack of suitable detection techniques. Most of the current technologies suffer from requiring complex protocols, not yet able to deliver robust and cost-effective…

Time-Gated Luminescence Acquisition for Biochemical Sensing: miRNA Detection

Citation: In: Pedras B. (eds) Fluorescence in Industry. Springer Series on Fluorescence (Methods and Applications), vol 18. Springer, Chamger Ser Fluoresc, DOI 10.1007/4243_2018_4 Abstracts Luminescence emission is a multidimensional phenomenon comprising a time-domain layer defined by its excited-state kinetics and corresponding lifetime, which is specific to each luminophore and depends on environmental conditions. This feature…