A Fluid Multivalent Magnetic Interface for High-Performance Isolation and Proteomic Profiling of Tumor-Derived...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Research

Background:

• Tumor-derived extracellular vesicles (T-EVs) are crucial biomarkers for cancer management.
• Efficient isolation and analysis of T-EVs are essential for clinical applications.
• Current methods face challenges in sensitivity and throughput.

Purpose of the Study:

• To develop a novel microfluidic chip for high-performance isolation, release, and protein profiling of T-EVs.
• To enhance the efficiency, sensitivity, and throughput of T-EV analysis.
• To facilitate T-EV detection and biomarker discovery for cancer diagnosis.

Main Methods:

• Development of a fluid multivalent magnetic interface (FluidmagFace) integrated into a microfluidic chip.
• Utilizing fluidity-enhanced multivalent binding for increased T-EV affinity and isolation efficiency.
• Employing anti-adsorption properties and hydrodynamic shear to minimize contamination and enhance detection sensitivity.
• Implementing reversible and expandable features for high-throughput T-EV recovery for mass spectrometry.

Main Results:

• FluidmagFace demonstrated a 10^5-fold increase in affinity and a 13.9% improvement in isolation efficiency compared to non-fluid interfaces.
• Detection sensitivity was increased by two orders of magnitude due to minimized contamination.
• T-EVs were successfully detected in all tested cancer samples.
• Differentially expressed proteins were identified in cancer samples compared to healthy controls.

Conclusions:

• The FluidmagFace microfluidic chip offers a high-performance solution for T-EV isolation, release, and protein analysis.
• This technology significantly improves T-EV detection sensitivity and enables high-throughput analysis.
• FluidmagFace represents a promising new approach for cancer diagnosis and biomarker discovery.