Automation of three-dimensional cell culture in arrayed microfluidic devices

Area of Science:

• Biotechnology
• Cell Biology
• Microfluidics

Background:

• Growing interest in cell-extracellular matrix (ECM) interactions necessitates efficient 3D culture systems.
• Existing high-throughput infrastructures can be leveraged with new microfluidic technologies.

Purpose of the Study:

• To develop a robust, automated, high-throughput, and low-cost 3D cell culture system.
• To adapt a previously reported 2D microfluidic system for 3D cell culture applications.

Main Methods:

• Utilized tubeless microfluidics with passive pumping for a high-throughput microchannel platform.
• Automated operational controls, including temperature management (4°C to 37°C) and sample handling.
• Optimized parameters using human mammary fibroblasts (HMFs) in type I collagen, assessing cell viability and distribution via fluorescent microscopy.

Main Results:

• Successfully automated a 3D cell culture system compatible with existing high-throughput infrastructure.
• Characterized and optimized operational parameters for collagen-based 3D cultures, including temperature control for polymerization.
• Demonstrated the platform's capability by automating a 3D breast carcinoma co-culture assay.

Conclusions:

• The developed microfluidic platform enables more efficient 3D cell culture experiments.
• This system provides a foundation for high-throughput investigations into cell-ECM interactions.
• The automated system offers a low-cost, high-throughput solution for complex biological studies.