Differentiating neutrophils using the optical coulter counter

Area of Science:

• Biomedical Engineering
• Cell Biology
• Hematology

Background:

• Current hematology analyzers offer limited quantitative data on neutrophils beyond cell counts.
• Understanding neutrophil phenotypes is crucial for diagnosing and managing various diseases.

Purpose of the Study:

• To develop and validate a high-throughput optofluidic system for comprehensive neutrophil characterization.
• To quantify cell volume, dry mass, and nuclear morphology simultaneously.

Main Methods:

• Utilized an optofluidic chip with a microfluidic channel for high-throughput cell analysis.
• Employed quantitative phase imaging and dye exclusion for cell volume and dry mass determination.
• Integrated nucleic acid fluorescent staining for nuclear morphology assessment.

Main Results:

• Successfully quantified cell volume, dry mass, and nuclear morphology of neutrophils in flow.
• Demonstrated the system's ability to correlate cell volume with other cellular characteristics.
• Achieved high-throughput measurements independent of cell refractive index and compatible with fast-flowing cells.

Conclusions:

• The developed optofluidic system offers a powerful tool for detailed neutrophil phenotyping.
• This technology enhances diagnostic capabilities by providing quantitative cellular information beyond traditional methods.
• Enables deeper understanding of neutrophil heterogeneity in blood samples.