Biofluid pretreatment using gradient insulator-based dielectrophoresis: separating cells from biomarkers

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Biophysics

Background:

• Blood analysis is crucial for clinical diagnostics, providing insights into human health.
• Efficient separation of blood components is essential to minimize interference in sensing and detection.
• Current methods for separating blood components can be time-consuming or complex.

Purpose of the Study:

• To develop and evaluate an insulator-based gradient dielectrophoretic device for separating red blood cells (RBCs) from protein biomarkers.
• To demonstrate the efficiency and speed of RBC depletion for downstream protein analysis.
• To enable simplified sample preparation for diagnosing conditions like myocardial infarction.

Main Methods:

• Utilized an insulator-based gradient dielectrophoretic (iGDP) device.
• Employed dielectrophoresis to separate RBCs from model protein biomarkers in a buffer solution.
• Focused on minimizing RBC adherence to the channel walls for efficient depletion.

Main Results:

• Achieved significant depletion of red blood cells within one minute.
• Demonstrated effective separation of RBCs from model protein biomarkers.
• Confirmed that adhered RBCs do not impede the purification of the protein solution.

Conclusions:

• The iGDP device offers a rapid and efficient method for RBC depletion from biological samples.
• This technique can yield purified protein solutions suitable for downstream diagnostic applications, such as myocardial infarction biomarker detection.
• The developed device has potential for improving sample preparation in clinical diagnostics.