3D-printed functional engineered intestinal models

Area of Science:

• Biomedical Engineering
• Tissue Engineering
• Regenerative Medicine

Background:

• Traditional 2D and static 3D intestinal models lack the complexity of native tissue, limiting their predictive power for drug responses and disease mechanisms.
• The intestine is crucial for nutrient absorption, immune function, and maintaining barrier integrity, making accurate in vitro models essential for physiological studies.

Purpose of the Study:

• To systematically review the latest advancements in 3D bioprinting for creating biomimetic intestinal models.
• To explore the techniques, materials, and strategies used in constructing these complex models.
• To discuss the applications, challenges, and future directions in the field.

Main Methods:

• Review of current literature on 3D bioprinting techniques for intestinal tissue engineering.
• Analysis of bioink formulations, cell sources, and structural fabrication strategies.
• Exploration of integration with organ-on-a-chip systems and applications in drug screening and disease modeling.

Main Results:

• 3D bioprinting enables the reconstruction of complex gut architectures with improved biomimicry, cellular diversity, and microenvironmental cues.
• Novel bioinks and printing methods are key technological drivers in creating more physiologically relevant intestinal models.
• These models show expanding applications in drug screening, studying intestinal development, diseases, and tissue repair.

Conclusions:

• 3D bioprinting is revolutionizing the development of in vitro intestinal models, enhancing their ability to replicate native tissue.
• Significant progress has been made, but challenges in achieving full physiological maturity, scalability, standardization, and cost-effectiveness remain.
• Future research should focus on enhancing model fidelity, enabling multi-organ integration, and improving translational potential for clinical applications.