Patterning cellular compartments within TRACER cultures using sacrificial gelatin printing.

Area of Science:

• Oncology
• Biotechnology
• Cancer Biology

Background:

• Tumor microenvironment components like hypoxia influence cancer progression and therapy resistance.
• Advanced 3D in vitro models are crucial for studying tumor biology but are often complex and time-consuming.
• The TRACER platform offers an accessible method for 3D tumor cultures but initially lacked multi-cell type capabilities.

Purpose of the Study:

• To enhance the TRACER platform for creating multi-cell type 3D tumor models.
• To develop a simple strategy for patterning distinct cell populations within TRACER scaffolds.
• To expand the utility of TRACER for studying complex tumor microenvironments and facilitating drug development.

Main Methods:

• Development of a custom gelatin-dispensing pen for creating temporary barriers within TRACER scaffolds.
• Patterning distinct cell type domains using gelatin barriers to define spatial organization.
• Utilizing the TRACER platform with patterned cell domains to create multi-cellular 3D tumor cultures.

Main Results:

• Successful implementation of a gelatin-based strategy to pattern multiple cell types within TRACER layers.
• Demonstration of a method to create defined domains for neoplastic and stromal cells.
• The gelatin barriers can be easily removed after cell seeding, allowing cell-cell interactions.

Conclusions:

• The gelatin-patterning strategy significantly expands the capabilities of the TRACER platform.
• This approach enables the generation of more biologically relevant multi-cell type 3D tumor models.
• The method offers a simple and effective tool for fundamental cancer biology research and therapeutic development.