Integrated microfluidic device for automated single cell analysis using electrophoretic separation and electrospray...

Area of Science:

• Analytical Chemistry
• Biotechnology
• Microfluidics

Background:

• Automated analysis of individual cells is crucial for biological research.
• Existing methods often lack the throughput or sensitivity required for comprehensive single-cell studies.

Purpose of the Study:

• To develop a microfluidic device for automated, real-time analysis of individual cells.
• To integrate capillary electrophoresis (CE) and electrospray ionization-mass spectrometry (ESI-MS) for cellular component detection.

Main Methods:

• A microfabricated fluidic device was engineered with integrated cell lysis and CE separation.
• An electroosmotic pump directed separated cellular components to an ESI-MS interface for analysis.
• Human erythrocytes were used as a model system to validate the device's performance.

Main Results:

• The device successfully lysed individual erythrocytes and separated cellular constituents in real-time.
• Detected components included the heme group and hemoglobin subunits (alpha and beta) from single cells.
• Achieved an average analysis throughput of approximately 12 cells per minute.

Conclusions:

• The developed microfluidic device enables high-throughput, automated single-cell analysis.
• This integrated CE-ESI-MS approach offers a powerful tool for detailed cellular characterization.
• Demonstrates potential for advancing research in fields requiring rapid single-cell diagnostics and discovery.