A Wireless Cytosensor Based on a Bionic Dandelion Isothermal Amplification System for Ultrasensitive Detection of...

Area of Science:

• Biomedical Engineering
• Oncology
• Nanotechnology

Background:

• Accurate detection of circulating tumor cells (CTCs) is crucial for cancer management but faces challenges in sensitivity, cost, and complexity.
• Existing methods for CTC detection often have limitations that hinder widespread clinical adoption.

Purpose of the Study:

• To develop a sensitive, cost-effective, and operationally simple wireless cytosensor for accurate CTC detection.
• To leverage a novel bionic dandelion isothermal amplification system (BDIAS) and wireless lateral flow immunoassay (LFIA) for enhanced detection capabilities.

Main Methods:

• Development of a BDIAS integrating DNA walkers, nonlinear DNA self-assembly, and AuFe Janus nanoparticles for high amplification efficiency.
• Integration of BDIAS with wireless LFIA technology, including a wireless fluorescence strip analyzer and smartphone for rapid signal detection.
• Validation of the wireless cytosensor using whole-blood samples, assessing sensitivity, specificity, reproducibility, and anti-interference capabilities.

Main Results:

• The BDIAS achieved a 6.72-fold enhancement in amplification efficiency compared to traditional isothermal amplification systems (TIASs).
• The wireless cytosensor demonstrated an ultralow detection limit of 1.58 cells/mL.
• The system provided rapid (1-second) and precise detection with superior specificity and reproducibility, successfully detecting CTCs in whole blood.

Conclusions:

• The developed wireless cytosensor offers a highly sensitive, specific, and simple method for CTC detection.
• The synergistic integration of BDIAS and wireless LFIA technology shows significant promise for advancing clinical oncology diagnostics.
• This innovative approach addresses key limitations in current CTC detection, paving the way for improved cancer patient management.