Seven steps to stellate cells.

Area of Science:

• Hepatology
• Cell Biology
• Immunology

Background:

• Hepatic stellate cells (HSCs) are liver-resident cells crucial for vitamin A storage and extracellular matrix production.
• Activated HSCs contribute to liver fibrosis and regulate vascular tone in portal hypertension.
• Recent findings highlight HSCs as potent antigen-presenting cells activating lymphocytes.

Purpose of the Study:

• To present a detailed and efficient protocol for the isolation of pure hepatic stellate cells from mouse liver.
• To provide methods for assessing the purity and characterizing isolated HSCs.

Main Methods:

• Mouse livers are perfused in situ and treated with Pronase E and Collagenase P.
• Further enzymatic digestion in vitro is followed by density gradient centrifugation using 8% Nycodenz.
• Isolation leverages the high vitamin A content of HSC lipid droplets for separation.

Main Results:

• The protocol yields a highly pure and homogenous population of hepatic stellate cells.
• Purity is assessed by glial fibrillary acidic protein (GFAP) staining and microscopy.
• Morphological analysis reveals characteristic star-shaped cells with lipid droplets.

Conclusions:

• This method provides an efficient means to isolate hepatic stellate cells for further study.
• The protocol includes characterization steps to ensure cell purity and identity.
• Isolated HSCs can be used to investigate their roles in liver disease and immunity.