DNA self-assembly-based direct fluorescence encoding of targets enables simultaneous 10-plex microRNA detection

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• MicroRNAs (miRNAs) are key post-transcriptional regulators and valuable biomarkers for disease diagnosis and precision medicine.
• Existing miRNA detection technologies, such as Luminex xMAP, face limitations in sensitivity and reproducibility.

Purpose of the Study:

• To develop an innovative imaging-based detection system for microRNAs.
• To overcome the limitations of current miRNA detection methods by enhancing sensitivity and enabling multiplexed detection.

Main Methods:

• Leveraged DNA self-assembly and fluorescence barcoding technologies for a novel detection system.
• Utilized programmable DNA assemblies for specific target recognition and signal amplification.
• Employed magnetic bead-mediated target enrichment and a four-color fluorescent encoding system for multiplexed detection of 10 miRNAs.

Main Results:

• The system demonstrated enhanced sensitivity through magnetic bead-mediated target enrichment and DNA self-assembly.
• A four-color fluorescent encoding system enabled multiplexed detection of 10 miRNAs in a single tube.
• Validation in MCF-7 breast cancer cell lines confirmed robust performance in complex biological matrices.

Conclusions:

• The developed platform offers a streamlined, cost-effective, and reproducible method for miRNA detection.
• This innovative system holds potential for early tumor screening and advancing precision medicine.
• The system provides a new technical means for sensitive and multiplexed miRNA analysis.