Adjustable and Versatile 3D Tumor Spheroid Culture Platform with Interfacial Elastomeric Wells

Area of Science:

• Biotechnology
• Cell Biology
• Materials Science

Background:

• Three-dimensional (3D) cell culture models are crucial for mimicking in vivo tissue and tumor microenvironments.
• Existing 3D culture methods often lack versatility and the ability to recapitulate complex biological systems accurately.

Purpose of the Study:

• To develop an adjustable and versatile 3D cell culture platform for spheroid formation and in situ analysis.
• To create elastomeric spherical wells for efficient and controlled tumor spheroid generation.
• To utilize the platform for investigating drug responses and reactive oxygen species (ROS) in a 3D cancer model.

Main Methods:

• Fabrication of elastomeric spherical wells via a one-step interfacial reaction of aqueous droplets on polydimethylsiloxane (PDMS).
• Controlled formation of wells with varying sizes and curvatures based on surface tension properties.
• High-efficiency generation of single tumor spheroids using cocultured tumor cells and fibroblasts within the wells.

Main Results:

• Successfully fabricated adjustable elastomeric wells for 3D cell culture without templates or expensive equipment.
• Achieved high-efficiency (up to 97%) formation of single tumor spheroids reflecting a complex cancer tissue microenvironment.
• Demonstrated the utility of the platform for in situ drug response observation and reactive oxygen species (ROS) monitoring.

Conclusions:

• The proposed tunable 3D cell culture platform offers a versatile method for spheroid formation and analysis.
• This system significantly contributes to multimodal analyses of anticancer therapeutics and the tumor microenvironment.
• The platform provides a valuable tool for studying cancer biology and drug efficacy in a more physiologically relevant context.