Fibrin Hydrogels for Endothelialized Liver Tissue Engineering with a Predesigned Vascular Network

Area of Science:

• Biotechnology
• Regenerative Medicine
• Tissue Engineering

Background:

• Vascular networks are critical for nutrient supply and waste removal in bioartificial organs.
• Existing bioartificial organ technologies require robust vascularization for successful implantation.

Purpose of the Study:

• To develop a novel technology for manufacturing endothelialized liver tissues with a predesigned vascular network.
• To create a viable, implantable bioartificial liver construct.

Main Methods:

• Utilized fibrin hydrogel and a rotational combined mold to assemble hepatocytes and adipose-derived stem cells (ADSCs).
• Incorporated poly(dl-lactic-co-glycolic acid) for enhanced mechanical properties and isolation.
• Differentiated ADSCs into endothelial cells using a cocktail growth factor approach.

Main Results:

• Achieved 100% cell survivability in the construct after 6 days of in vitro culture.
• Demonstrated a functional hierarchical vascular network within the liver tissue construct.
• Confirmed the viability of the complex organ construct through mechanical and permeability evaluations.

Conclusions:

• Successfully created the first implantable bioartificial liver with endothelialized tissue and a hierarchical vascular network.
• The developed technology offers a promising solution for creating complex, multi-tissue engineered organs.
• This advancement paves the way for improved bioartificial organ transplantation strategies.