Magnetic augmentation through multi-gradient coupling enables direct and programmable profiling of circulating...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Biosensing

Background:

• Conventional magnetic biosensing methods face limitations in analytical capacity and require extensive sample processing.
• There is a need for advanced biosensing technologies capable of direct molecular detection in complex biological samples.

Purpose of the Study:

• To develop a novel biosensing platform for direct and programmable molecular detection in native biofluids.
• To overcome the limitations of existing magnetic biosensing technologies.

Main Methods:

• Spatially engineered 3D magnetic response gradients using gradient-distributed magnetic nanoparticles within hydrogel pillars.
• Developed a system named magnetic augmentation through triple-gradient coupling for high-performance detection (MATCH).
• Implemented an upstream module for programmable biomarker recognition and detection in native plasma.

Main Results:

• MATCH enables multi-gradient matching for optimal magnetic activation, response, and transduction.
• The platform achieves sensitive detection of RNA (down to 10 copies) and proteins (down to 1000 copies) in <60 minutes.
• Direct measurement of RNAs and proteins in patient plasma using MATCH accurately classified cancer.

Conclusions:

• MATCH technology offers a significant advancement in magnetic biosensing, enabling direct, programmable, and sensitive detection of circulating biomarkers.
• The platform bypasses conventional magnetic labeling and sample processing, offering a faster and more efficient diagnostic approach.
• Application in patient plasma demonstrates accurate cancer classification, highlighting its clinical potential.