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Updated: Jan 18, 2026
09:06
MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as A Novel Detection and Quantification Method
Published on: October 7, 2025
348
Microchip electrophoretic sensing of multiplex microRNAs based on dual nucleic acid amplification
Qihui Xie1, Shuang Tang1, Jianan Lv1
1School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, PR China. qjwang@chem.ecnu.edu.cn.
The Analyst
|January 16, 2026
Summary
This study introduces a novel method for detecting multiple lung cancer microRNAs (miRNAs) simultaneously. The technique offers high sensitivity and specificity for early tumor diagnosis.
Area of Science:
- Biochemistry
- Molecular Biology
- Analytical Chemistry
Background:
- MicroRNAs (miRNAs) show promise as early diagnostic biomarkers for lung cancer.
- Detecting multiple miRNAs simultaneously is challenging due to their similarity and low concentrations.
- An "miRNA fingerprint" offers greater specificity than single miRNA detection.
Purpose of the Study:
- To develop a method for simultaneous and accurate detection of multiple lung cancer-associated miRNAs.
- To enhance sensitivity and specificity in miRNA detection for early lung cancer diagnosis.
Main Methods:
- Developed a dual nucleic acid amplification system using duplex-specific nuclease (DSN)-mediated cycling.
- Integrated a bipedal DNA walker with microchip electrophoresis (MCE) for signal amplification.
- Utilized capture probes and target recycling for miRNA identification and signal generation.
Main Results:
- Achieved two stages of signal amplification, enhancing detection sensitivity.
- Demonstrated excellent accuracy and specificity, even with single base mismatches.
- Established a low limit of detection (LOD) of 0.2 fM and a wide linear range (1 fM to 10 pM).
- Successfully applied the method to human lung tumor cells.
Conclusions:
- The developed method provides sensitive, specific, and rapid detection of lung cancer-associated miRNAs.
- This technique holds significant potential for early tumor diagnosis and clinical applications.
