A Microfluidic Platform Containing Sidewall Microgrooves for Cell Positioning and Trapping.

Area of Science:

• Biotechnology
• Microfluidics
• Cellular Engineering

Background:

• Microfluidic channels are crucial for controlling cell positioning and enabling high-throughput screening.
• Precise cell manipulation is vital for various biological applications, including drug screening and cell-based biosensing.

Purpose of the Study:

• To propose and investigate a simple microfluidic platform for capturing small cell volumes using sidewall microgrooves.
• To study cell docking patterns and positioning within microfluidic channels featuring sidewall microgrooves of varying widths.

Main Methods:

• Numerical and experimental investigations were conducted on microfluidic channels with sidewall microgrooves of 50, 100, and 200 μm widths.
• Particle modeling was employed to predict cell positioning within the microgrooves.
• Quantification of cell positions and correlation with shear stress variations were performed.

Main Results:

• Sidewall microgrooves significantly regulate cell positioning and patterning within microfluidic channels.
• Cell capture capacity varied with microgroove width: 10-14 cells (200 μm), 2-5 cells (100 μm), and 1-2 cells (50 μm).
• Particle modeling accurately predicted cell positioning, and shear stress was correlated with cell distribution.

Conclusions:

• The developed microfluidic platform with sidewall microgrooves offers effective control over cell positioning and patterning.
• This technology holds potential for applications in 2D/3D cell patterning, high-throughput screening, drug discovery, and cell-based biosensing.