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Stabilizing Hepatocellular Phenotype Using Optimized Synthetic Surfaces
Published on: September 26, 2014
Rat hepatocyte morphology and function on lactose-derivatized polystyrene surfaces.
A T Gutsche1, J Zurlo, E Deyesu
1Department of Biomedical Engineering, Johns Hopkins School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21218.
Biotechnology and Bioengineering
|February 5, 1996
Summary
Hepatocytes cultured on a novel polymer substrate (PS-lactose) maintained differentiated functions longer than those on collagen I. This new method supports hepatocyte function for up to one week without protein coatings.
Area of Science:
- Hepatocyte culture
- Biomaterials science
- Cell biology
Background:
- Maintaining differentiated functions of primary hepatocytes in vitro is crucial for drug metabolism and toxicology studies.
- Traditional culture systems often require protein coatings and specific media additives, limiting their applicability.
- Exploring novel polymer substrates is essential for improving hepatocyte culture systems.
Purpose of the Study:
- To compare the morphological and functional differences of rat hepatocytes cultured on collagen I versus a lactose-derivatized polystyrene (PS-lactose) substrate.
- To evaluate the long-term maintenance of differentiated hepatocyte functions on these substrates.
- To establish a novel hepatocyte culture system that supports differentiated functions without protein coatings or extensive media additives.
Main Methods:
- Isolation of hepatocytes from male Fisher 344VF rats.
- Culture of hepatocytes on collagen I and PS-lactose substrates.
- Assessment of hepatocyte morphology using actin cytoskeletal staining and scanning electron microscopy.
- Functional assays including albumin secretion, reduced glutathione content, UDP-glucuronosyl transferase, and cytochrome P4501A1 activity.
Main Results:
- Hepatocyte morphology significantly differed between collagen I and PS-lactose substrates.
- Differentiated functions on collagen I required dexamethasone and dimethylsulfoxide (DMSO) for maintenance.
- Hepatocytes on PS-lactose exhibited a slower loss of function over time.
- Dexamethasone and DMSO further enhanced differentiated function maintenance on PS-lactose.
Conclusions:
- The PS-lactose substrate supports prolonged maintenance of differentiated hepatocyte functions compared to collagen I.
- This study presents the first reported polymer-based culture system enabling hepatocytes to retain differentiated functions for up to one week without protein coatings or additional media supplements.
- The findings offer a promising alternative for in vitro hepatocyte culture, advancing research in drug metabolism and toxicology.
