Processing of nanolitre liquid plugs for microfluidic cell-based assays

Area of Science:

• Microfluidics
• Cell Biology
• Assay Development

Background:

• Microfluidic devices offer precise control over small fluid volumes.
• Droplet-based microfluidics, or plugs, present unique advantages for biological assays.
• Efficient mixing and homogeneous cell suspensions are critical for reliable assay results.

Purpose of the Study:

• To describe a novel microdevice for handling nanolitre liquid plugs.
• To demonstrate the utility of this device for cell culture and various cellular assays.
• To highlight the benefits of plug-based liquid handling for microfluidic applications.

Main Methods:

• Development of a microdevice capable of generating and manipulating nanolitre liquid plugs.
• Utilizing internal recirculation flow within plugs for rapid solution mixing.
• Performing serial dilutions of reagents and cell suspensions with varying densities and types.
• Culturing cells within the microdevice and conducting subsequent cellular assays.

Main Results:

• Demonstrated rapid mixing of solutions and homogeneous cell suspensions using nanolitre plugs.
• Successfully performed serial dilutions of reagents and diverse cell types with minimal volumes.
• Confirmed that cells cultured via plug processing exhibit healthy growth.
• Successfully detected cellular glucose consumption and responses to anticancer agents using plug-based assays.

Conclusions:

• The developed plug-based microdevice is a powerful tool for nanolitre liquid handling in microfluidics.
• This technology facilitates efficient cell culture and diverse cellular assays, including drug screening.
• Plug-based microfluidics offers a revolutionary platform for fundamental cell biology and pharmaceutical research.