Modeling Tumor Phenotypes In Vitro with Three-Dimensional Bioprinting.

Area of Science:

• Biotechnology
• Cancer Research
• Tissue Engineering

Background:

• The tumor microenvironment is crucial for cancer progression and treatment resistance.
• Studying specific tumor-stromal interactions in vivo is difficult.
• Current in vitro models lack the complexity to fully replicate in vivo tumor characteristics.

Purpose of the Study:

• To evaluate three-dimensional (3D) bioprinting as an improved in vitro model for cancer research.
• To incorporate multiple cell types into scaffold-free tumor tissues with defined architecture.
• To model patient-specific tumors and their microenvironments for studying tumorigenic phenotypes.

Main Methods:

• Utilized 3D bioprinting to create scaffold-free tumor tissues.
• Incorporated multiple cancer cell types (breast and pancreatic) and relevant stromal cells.
• Generated patient-specific tumor models using primary patient tissue.
• Assessed intrinsic, extrinsic, and spatial tumorigenic phenotypes in bioprinted tissues.

Main Results:

• Bioprinted tissues successfully modeled patient-specific tumors.
• Cellular proliferation, extracellular matrix deposition, and cellular migration were altered by extrinsic signals and therapies.
• The 3D bioprinting technique recapitulated key aspects of in vivo neoplastic tissues.
• Demonstrated the ability to interrogate multiple tumorigenic endpoints within defined tumor microenvironments.

Conclusions:

• Multi-cell-type 3D bioprinted tissues offer a more accurate in vitro model for cancer research.
• This technique provides a manipulable system to study tumor-stromal interactions and tumorigenic phenotypes.
• 3D bioprinting advances the study of tumor microenvironments and therapeutic resistance.