Microfluidic device for the high-throughput and selective encapsulation of single target cells

Area of Science:

• Biotechnology
• Microfluidics
• Cell Biology

Background:

• Conventional passive single-cell encapsulation methods suffer from low efficiency due to random cell arrival.
• Pre-encapsulation cell sorting is often required, adding complexity to single-cell analysis workflows.
• Low cell frequency per droplet is necessary for precision, further reducing throughput in passive systems.

Purpose of the Study:

• To develop an advanced microfluidic technology for active, high-efficiency single-cell encapsulation.
• To integrate cell sorting capabilities directly into the droplet encapsulation process.
• To overcome the limitations of low efficiency and throughput in conventional single-cell encapsulation.

Main Methods:

• A microfluidic chip was designed with integrated optical detection and a piezo-controlled sorting section.
• The system actively detects cell optical information and sorts target cells into droplets.
• The technology utilizes active control for precise single-cell encapsulation.

Main Results:

• The developed device achieved high purity (>97.9%) for single-target-cell droplets.
• It demonstrated high throughput, encapsulating up to 2900 single target cells per second.
• The system effectively processed particle populations with high arrival frequencies (up to 6000 particles/s).

Conclusions:

• The novel active encapsulation technology significantly surpasses conventional methods in efficiency and throughput.
• This approach offers enhanced flexibility for diverse single-cell research applications.
• The technology shows great potential for advancing single-cell analysis and related fields.