Cholestasis: human disease and experimental animal models

Area of Science:

• Hepatology and Gastroenterology
• Molecular Biology
• Toxicology

Background:

• Cholestasis, impaired bile flow, stems from hepatocyte or ductular cell dysfunction or bile duct obstruction.
• Numerous factors induce cholestasis in humans, including drugs (especially antibiotics), genetic disorders, and infections.
• Experimental animal models are vital for elucidating cholestasis mechanisms and clinical relevance.

Purpose of the Study:

• To review the utility of experimental animal models in understanding cholestasis.
• To highlight the role of transport proteins in cholestasis pathophysiology and regulation.
• To connect findings from animal models to human cholestasis.

Main Methods:

• Review of established experimental models for intrahepatic and extrahepatic cholestasis.
• Analysis of drug-induced cholestasis models, including alpha naphthylisothiocyanate.
• Investigation of natural rat models with congenital transport protein deficiencies.

Main Results:

• Experimental models like estrogen-induced, endotoxin-induced, and drug-induced cholestasis provide insights into intrahepatic conditions.
• Common bile duct ligation serves as a model for extrahepatic biliary obstruction.
• Studies identified down-regulated and up-regulated hepatocyte transport proteins as key alterations and compensatory mechanisms in cholestasis.

Conclusions:

• Animal models are indispensable for advancing the understanding of both congenital and acquired human cholestasis.
• Investigating transport protein alterations in animal models is crucial for deciphering regulatory mechanisms in liver cells.
• Continued research using animal models and transport protein analysis will drive progress in managing cholestasis.