Hepatocyte culture on biodegradable polymeric substrates.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Developing effective cell transplantation devices requires biocompatible materials.
• Biodegradable polymers are promising candidates for tissue engineering scaffolds.
• Maintaining differentiated cell function in vitro is crucial for transplantation success.

Purpose of the Study:

• To evaluate biodegradable polymer films for primary rat liver cell transplantation.
• To assess cell adhesion, growth, and biochemical function on poly (D,L-lactic-co-glycolic acid) (PLGA) and a PLGA/poly (L-lactic acid) (PLLA) blend.
• To compare polymer substrates with matrigel and collagen-coated polystyrene.

Main Methods:

• In vitro assessment of primary rat liver cells on PLGA and PLGA/PLLA blend films.
• Evaluation of cell adhesion kinetics, growth, and albumin secretion rates.
• Comparison with matrigel and collagen-coated polystyrene control substrates.

Main Results:

• Cell adhesion rates to polymer films were similar to collagen controls.
• The PLGA/PLLA blend supported extended cell culture.
• Hepatocytes on the polymer blend retained differentiated function, with albumin secretion matching matrigel and in vivo levels.
• Albumin secretion on collagen-coated polystyrene declined significantly over five days.
• Cells on the polymer blend showed DNA synthesis rates comparable to collagen controls.

Conclusions:

• The PLGA/PLLA blend is a suitable substrate for maintaining differentiated hepatocyte function in vitro.
• This polymer blend shows potential for use in cell transplantation devices.
• The findings suggest improved biocompatibility and cell function retention compared to conventional substrates.