Integrating Hierarchical Vasculature into Engineered Cardiac Tissues

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Integrating perfusable vasculature into engineered cardiac tissue is a critical challenge for clinical translation.
• Current strategies focus on either cell-driven self-organization or biofabrication-guided structure, with limited success in combining both.
• Bridging the gap between myocardial and vascular tissue engineering is essential for functional cardiac constructs.

Purpose of the Study:

• To review and evaluate current strategies for engineering vascularized cardiac tissues.
• To categorize approaches into biologically driven and engineering-driven methods.
• To propose a path forward, emphasizing hybrid strategies for enhanced physiological and translational relevance.

Main Methods:

• Categorization of vascularization strategies into biologically driven (cell self-organization) and engineering-driven (biofabrication) approaches.
• Evaluation of each strategy based on structural fidelity, functional maturation, and scalability.
• Development of a benchmarking framework to assess physiological and translational relevance.

Main Results:

• Biologically driven approaches utilize cell-intrinsic mechanisms for vascular network formation.
• Engineering-driven methods employ biofabrication techniques to dictate tissue architecture.
• Both approaches have limitations in achieving comprehensive vascularization and functional integration.
• Hybrid strategies combining both approaches show promise for overcoming current limitations.

Conclusions:

• A hybrid approach, integrating cell-driven self-organization with biofabrication, is crucial for advancing vascularized cardiac tissue engineering.
• Further research is needed to optimize hybrid strategies for improved structural integrity, functional maturation, and scalability.
• Addressing the challenge of vascular integration is key to translating engineered cardiac tissues for therapeutic applications.