High Throughput Single-cell and Multiple-cell Micro-encapsulation

Overview

This protocol describes a method to control the encapsulation of cells in picoliter-sized drops by combining fluid dynamic cell ordering with drop generation. The approach allows for high-frequency drop generation while maintaining control over the number of cells per drop.

Key Study Components

Area of Science

• Microfluidics
• Cell encapsulation
• Drop generation techniques

Background

• Encapsulation of cells in small drops is crucial for various applications.
• Previous methods lacked control over the number of cells per drop.
• Microfluidic techniques can enhance the precision of cell encapsulation.
• Combining different microfluidic phenomena can improve efficiency.

Purpose of Study

• To develop a method for precise control of cell encapsulation in drops.
• To demonstrate the effectiveness of combining cell ordering and drop generation.
• To achieve higher encapsulation efficiencies compared to unordered methods.

Methods Used

• Utilization of a flow focusing drop generation nozzle.
• High flow rates to create ordered trains of cells or particles.
• Synchronization of drop generation with the arrival of ordered cells.
• Use of surfactant-stabilized oil carrier fluid for drop formation.

Main Results

• Demonstrated control over the number of cells per drop.
• Achieved drop generation rates at kilohertz frequencies.
• Showed efficiencies exceeding those of unordered encapsulation.
• Validated the method using both cells and particle surrogates.

Conclusions

• The method allows for efficient encapsulation of cells in microfluidic drops.
• Combining cell ordering with drop generation enhances control.
• This approach can be applied to various biological and biomedical applications.

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