A Challenge for Engineering Biomimetic Microvascular Models: How do we Incorporate the Physiology?

Area of Science:

• Biomaterials Science
• Vascular Biology
• Tissue Engineering

Background:

• The discrepancy between in vitro and in vivo experimental results necessitates advanced models.
• Microvascular networks are complex systems involving multiple cell types and environmental factors.
• Current limitations exist in replicating the full functional complexity of in vivo microcirculation in vitro.

Purpose of the Study:

• To review the evolution of biomimetic modeling approaches for microvascular dynamics.
• To highlight engineering design requirements for achieving physiological function in models.
• To discuss the value of tissue-engineered models in bridging the in vitro-in vivo gap.

Main Methods:

• Overview of recent advancements in biomimetic modeling techniques.
• Focus on top-down tissue culture methods for maintaining complexity.
• Analysis of engineering design principles for physiological mimicry.

Main Results:

• Biomimetic models enable investigation of cell-cell and cell-environment interactions.
• These models successfully mimic key aspects of microvascular network complexity.
• Examples of physiological validation, basic science discoveries, and therapeutic evaluations are presented.

Conclusions:

• Biomimetic tissue-engineered models are valuable tools for studying microcirculation.
• These models effectively bridge the gap between in vitro and in vivo assays.
• Future development should focus on integrating multi-component complexity for enhanced physiological relevance.