Maintained function of primary human hepatocytes by cellular interactions in coculture: implications for liver...

Area of Science:

• Hepatology
• Tissue Engineering
• Biomedical Engineering

Background:

• Primary hepatocytes lose differentiation and function in vitro, limiting their use in artificial liver systems.
• Maintaining the specialized functions of liver cells is crucial for developing effective bio-artificial liver devices.

Purpose of the Study:

• To establish a stable coculture model of human hepatocytes and biliary epithelial cells (BEC).
• To evaluate the efficacy of a multicompartment capillary membrane system for hepatocyte perfusion.
• To investigate methods for preserving hepatocyte morphology and function in vitro.

Main Methods:

• Coculture of primary human hepatocytes with autologous BEC in collagen gel with growth factors.
• Perfusion of hepatocytes in a multicompartment capillary membrane bioreactor system.
• Measurement of albumin secretion as a key indicator of hepatocyte function.

Main Results:

• Hepatocytes in serum-free media produced albumin for over 2 weeks, enhanced by conditioned medium.
• Coculture with BEC significantly increased albumin secretion, indicating improved tissue-specific differentiation.
• Perfusion in bioreactors maintained steady-state albumin levels for over 2 weeks.

Conclusions:

• Coculture with BEC and 3D hybrid organ devices can maintain primary human hepatocyte differentiation.
• Appropriate growth factors and matrix support are essential for tissue regeneration in artificial liver systems.
• This approach offers a promising strategy for improving the performance of bio-artificial liver devices.