Constructing 3D In Vitro Models of Heterocellular Solid Tumors and Stromal Tissues Using Extrusion-Based Bioprinting.

Area of Science:

• Biomedical Engineering
• Cancer Research
• Tissue Engineering

Background:

• Malignant tumors display significant heterogeneity, including varied cell populations, stromal composition, and mechanical stresses under hypoxic conditions.
• Current in vitro techniques struggle to fully replicate the complex tumor microenvironment.
• Preclinical in vivo models have limitations in studying specific tumor variables.

Purpose of the Study:

• To review advances in extrusion bioprinting for recreating the 3D tumor microenvironment.
• To highlight the potential of bioprinting for developing in vitro tumor models.
• To discuss the advantages of bioprinting over traditional animal models.

Main Methods:

• Review of extrusion bioprinting technologies and applications in cancer research.
• Analysis of biomaterial engineering for replicating tumor microenvironment features.
• Discussion of creating complex, heterogeneous in vitro models.

Main Results:

• Extrusion bioprinting allows precise deposition of multiple materials, cell types, and concentrations.
• Bioprinted models can replicate physiological features, extracellular matrix, and stromal composition.
• Engineered biomaterials enhance experimental reproducibility and throughput.

Conclusions:

• Extrusion bioprinting is a promising technology for in vitro tumor model development.
• Bioprinted models offer enhanced physiological relevance and reproducibility compared to animal models.
• This technology facilitates the study of tumor heterogeneity and microenvironment dynamics.