Development of an Improved Method for the Isolation and Culture of Newborn Sheep Primary Hepatocytes

Abstract

The liver plays a crucial role in metabolism, synthesis, biotransformation, secretion, and excretion. Hepatocytes are the main cells of the liver and can be used as a cell model to study liver function. The classic method of collagenase perfusion to isolate hepatocytes is a two-step technique that is time-consuming, labor-intensive, and has high technical requirements. Therefore, in this study, we compared different methods for isolating and culturing primary hepatocytes. We found that the 0.25% trypsin and 0.1 mg/mL type IV collagenase mixture at a 1:1 ratio showed the most efficient cell digestion, and William’s Medium E complete medium showed the best growth and proliferation. The isolated cells showed the typical irregular polygonal morphology of hepatocytes. Periodic acid–Schiff staining and immunofluorescence confirmed that the isolated cells were positive for glycogen and hepatocyte-specific markers cytokeratin 18, AFP, and albumin. On subculturing, stable cell lines were obtained. Therefore, we optimized the isolation and in vitro culture method to obtain highly pure (>95%) sheep primary hepatocytes from newborn sheep liver tissue.

Keywords

• sheep
• primary hepatocytes
• isolation
• culture
• identification
• optimization