Clinical microfluidics for neutrophil genomics and proteomics

Area of Science:

• Immunology
• Biotechnology
• Medical Diagnostics

Background:

• Neutrophils are critical immune cells involved in inflammatory responses.
• Current methods for neutrophil isolation can be time-consuming and may alter cell function.
• There is a need for rapid, efficient methods to analyze neutrophil function in clinical settings.

Purpose of the Study:

• To develop and validate a robust on-chip methodology for rapid isolation of neutrophils from whole blood.
• To enable simultaneous mRNA and protein isolation for downstream genomics and proteomics.
• To implement this tool in a clinical study for analyzing immune responses to severe trauma and burn injury.

Main Methods:

• Development of an 'on-chip' microfluidic device for direct whole blood processing.
• Validation using ex vivo neutrophil stimulation experiments.
• Comparison with standard bulk neutrophil isolation techniques.
• Integration into a near-patient blood processing system for a multi-center clinical study.

Main Results:

• The on-chip method allows for rapid isolation of neutrophils with integrated mRNA and protein processing.
• Validation confirmed the device's efficacy compared to standard methods.
• Preliminary data from a clinical study demonstrated unique, time-dependent neutrophil gene expression patterns.
• The tool successfully discriminated temporal transcriptional events in neutrophils in a clinical context.

Conclusions:

• The developed on-chip methodology provides a robust and rapid approach for neutrophil isolation and molecular analysis.
• This tool has significant potential for near-patient diagnostics and monitoring immune responses in critical care settings.
• The ability to capture dynamic neutrophil transcriptional changes offers new insights into immune responses to severe trauma and burns.