Engineered liver-like tissue on a capillarized matrix for applied research.

Area of Science:

• Biomedical Engineering
• Tissue Engineering
• Hepatology

Background:

• Developing functional in vitro liver models is crucial for research.
• Existing models often lack long-term viability and metabolic function.
• Tissue-engineering approaches offer potential for improved liver tissue models.

Purpose of the Study:

• To create a novel bioartificial liver in vitro model using tissue-engineering techniques.
• To establish a 3D coculture system of hepatocytes (HCs) and microvascular endothelial cells (mECs).
• To assess the viability, morphology, differentiation, and metabolic activity of the engineered liver tissue.

Main Methods:

• Porcine mECs were seeded onto a decellularized jejunal scaffold with preserved vasculature.
• Porcine HCs were subsequently seeded onto the vascularized scaffold, creating a 3D coculture.
• Histology, immunohistochemistry, and daily biochemical assays (urea, lactate) were used for monitoring.

Main Results:

• The 3D coculture system demonstrated viability for 3 weeks.
• Hepatocytes maintained their morphology and differentiation within the engineered tissue.
• The engineered tissue exhibited stable metabolic activity, unlike dedifferentiated HC monolayer cultures.

Conclusions:

• The developed mEC-HC coculture system represents a functional bioartificial liver-like tissue.
• This model serves as a promising test system for basic and applied research.
• Tissue-engineered cocultures offer superior performance over traditional HC monolayer cultures.