High-Throughput Microfluidic Device for Rare Cell Isolation.

Area of Science:

• Biomedical Engineering
• Oncology
• Cell Biology

Background:

• Circulating tumor cells (CTCs) are crucial biomarkers for cancer prognosis and disease monitoring.
• Isolating rare CTCs (1-10 per 7.5mL blood) from patient samples presents a significant technical challenge.
• Current methods for CTC isolation often rely on specific cell markers, limiting their universality.

Purpose of the Study:

• To develop and validate a novel microfluidic system for the label-free isolation of circulating tumor cells (CTCs).
• To address the challenge of isolating extremely rare CTCs from peripheral blood samples.
• To establish a size-based cell separation technique for potential clinical applications.

Main Methods:

• Development of a multistage microfluidic separator utilizing inertial migration principles.
• Cell sorting based on physical properties, specifically cell size, enabling label-free isolation.
• Feasibility demonstration using colloidal particles of sizes comparable to red blood cells and CTCs.

Main Results:

• Successful implementation of a novel microfluidic system for cell isolation.
• Demonstrated label-free separation of cells based on size via inertial migration.
• Validation of the system's capability to sort particles analogous to CTCs and red blood cells.

Conclusions:

• The developed microfluidic system offers a promising approach for label-free CTC isolation.
• Size-based sorting via inertial migration is a feasible strategy for enriching rare cell populations.
• This technology has the potential to advance cancer diagnostics and patient monitoring.