Intramolecular DNA Wheel Construction for Highly Sensitive Electrochemical Detection of miRNA.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39814677.
- Also identified by DOI 10.1021/acs.nanolett.4c05127 and PMC identifier 11783588.
- Licence recorded as CC BY-NC-ND.
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Abstract
Accurate and reliable quantification of disease-related biomolecules is essential for clinical diagnosis. In this study, a novel electrochemical approach is developed based on a target triggered DNA nanostructural switch from a hairpin dimer to a double-stranded wheel. During the process, electrochemical species get closer to the electrode interface, and the multiple intramolecular strand displacements are beneficial to low abundant target analysis. In addition, the use of nicking endonuclease mitigates background interference. This strategy enables highly sensitive and selective quantification of the target miRNA. A linear relationship is established between the peak current intensity and the logarithm of miRNA concentration within the range from 0.1 to 20 fM. This method also demonstrates high accuracy in the analysis of clinical samples, holding great potential for DNA nanotechnology in diagnostic applications.
Medical subject headings
- MicroRNAs
- Electrochemical Techniques
- DNA
- Biosensing Techniques