Engineering Vascular Bioreactor Systems to Closely Mimic Physiological Forces In Vitro

Area of Science:

• Biomedical Engineering
• Vascular Biology
• Tissue Engineering

Background:

• In vitro vascular models are crucial for research in vascular biology, drug discovery, and tissue engineering.
• These models aim to mimic human vasculature's geometry, cell types, and physiological forces.
• Current bioreactors struggle to replicate complex vascular conditions, including precise 3D architecture and multiple stimuli.

Purpose of the Study:

• To review the state of in vitro vascular modeling.
• To identify limitations in current vessel bioreactor systems.
• To highlight the need for improved systems that accurately replicate physiological forces.

Main Methods:

• Comprehensive literature review of in vitro vascular models and bioreactors.
• Analysis of core components and functionalities of existing systems.
• Evaluation of the ability of current systems to replicate physiological stimuli.

Main Results:

• Foundational elements like cell viability, nutrient exchange, 3D scaffolds, and basic sensing are established.
• Most bioreactors fail to independently replicate combinations of physiologically relevant stimuli (pressure, shear stress, flow rate).
• Reliance on simplistic pumping systems necessitates add-ons to approximate vascular conditions.

Conclusions:

• There is a critical need for innovation in vascular bioreactor development.
• Future systems must focus on providing appropriate physiological forces simultaneously.
• Improved in vitro vascular models will significantly advance tissue engineering and vascular biology research.