Detection of Exosomal microRNA from Malignant Lung Cells Using a Surface Plasmon Resonance Imaging Biosensor

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Molecular Diagnostics

Background:

• MicroRNAs (miRNAs) show potential as biomarkers for non-small-cell lung cancer (NSCLC).
• Early and accurate detection of NSCLC is crucial for patient outcomes.
• Existing diagnostic methods may require improvement in sensitivity and efficiency.

Purpose of the Study:

• To develop and evaluate a novel surface plasmon resonance imaging (SPRi) biosensor for detecting NSCLC.
• To utilize microRNA molecules as biomarkers for NSCLC detection.
• To assess the performance of an Au/Ag heterostructure combined with a DNA tetrahedron framework (DNATF) in the biosensor.

Main Methods:

• Fabrication of an SPRi biosensor incorporating an Au/Ag heterostructure.
• Integration of a DNA tetrahedron framework (DNATF) for enhanced detection.
• Evaluation of the biosensor's performance using microRNA targets associated with NSCLC.
• Characterization of detection range and limit of detection.

Main Results:

• The SPRi biosensor demonstrated a wide detection range from 1.82 fM to 28 nM.
• A highly sensitive limit of detection of 1.55 fM was achieved.
• Generated images provided sufficient fidelity for precise medical analysis.

Conclusions:

• The developed SPRi biosensor effectively detects malignant lung cells via microRNA biomarkers.
• The biosensor shows promise for optimizing the clinical diagnosis of NSCLC.
• This technology offers accurate and efficient determination for patients with NSCLC.