Irregular DNA Triangular Prism/Triplex Assembly for Duplicate MiRNA Analysis with Nicking Endonuclease-Mediated...

Area of Science:

• Biotechnology
• Nanotechnology
• Electrochemistry

Background:

• Sensitive microRNA detection is crucial for disease diagnosis and prognosis.
• Existing methods often lack selectivity or require complex procedures.

Purpose of the Study:

• To develop a highly sensitive and selective electrochemical platform for microRNA detection.
• To engineer a recyclable DNA nanostructure-based biosensor.

Main Methods:

• Utilized a three-dimensional DNA nanostructure (irregular triangular prism DNA) on gold nanoparticles.
• Employed nicking endonuclease-based amplification for signal enhancement.
• Integrated triplex assembly for immobilizing electrochemical labels.
• Regenerated the biosensor interface by pH-induced triplex dissociation.

Main Results:

• Achieved sensitive and selective detection of target microRNA.
• Demonstrated the regeneration capability of the DNA nanostructure biointerface for repeated analyses.
• The platform showed excellent prospects for disease-related microRNA quantification.

Conclusions:

• The developed electrochemical method offers a promising approach for microRNA detection.
• The recyclable DNA nanostructure biointerface can inspire future biosensing platform designs.