Multilayer architecture microfluidic network array for combinatorial drug testing on 3D-cultured cells.

Area of Science:

• Biomedical Engineering
• Drug Discovery
• Cell Biology

Background:

• In vitro drug testing is crucial for drug development.
• Three-dimensional (3D) cell cultures offer better drug efficacy prediction than 2D cultures but are costly and time-consuming.
• High-throughput screening of 3D cell models is needed to accelerate drug discovery.

Purpose of the Study:

• To develop a microfluidic platform for efficient 3D cell culture-based combinatorial drug screening.
• To create a 3D cell culture-based combinatorial drug screening array (3D-μCDS array) with reduced footprint and scalability.
• To demonstrate the utility of the 3D-μCDS array for high-throughput screening of anti-cancer drug combinations.

Main Methods:

• Development of a microfluidic platform with integrated pneumatic valves for producing thin-gel 3D cell cultures.
• Design of a multilayer architecture for a compact device footprint, facilitating scalability.
• Implementation of 8x8 combinatorial drug screening experiments using two anti-cancer drugs on breast cancer cell lines.

Main Results:

• The 3D-μCDS array successfully enabled screening of multiple drug combinations.
• The device reduced operation time and the required number of samples and reagents.
• Demonstrated effective use with MDA-MB-231 and MCF-7 breast cancer cell lines and anti-cancer drugs.

Conclusions:

• The developed 3D-μCDS array is an efficient tool for combinatorial drug screening.
• The platform is suitable for high-throughput screening, especially with valuable or limited samples.
• This technology can accelerate drug discovery and development processes.