Hepatocyte-specific ablation in zebrafish to study biliary-driven liver regeneration

Area of Science:

• Hepatology and Regenerative Medicine
• Zebrafish models in biomedical research

Background:

• The liver possesses significant regenerative capacity, occurring via hepatocyte- or biliary-driven pathways.
• Existing rodent models effectively study hepatocyte-driven regeneration but lack models for biliary-driven regeneration.
• Biliary epithelial cells (BECs) can differentiate into hepatocytes during liver regeneration.

Purpose of the Study:

• To present detailed methods for a zebrafish liver injury model enabling the study of biliary-driven liver regeneration.
• To establish a pharmacogenetic model for specific hepatocyte ablation in zebrafish.
• To facilitate the discovery of molecular and cellular mechanisms governing biliary-driven liver regeneration.

Main Methods:

• Development of a zebrafish model with pharmacogenetic hepatocyte ablation.
• Detailed protocols for inducing hepatocyte loss and analyzing regeneration from biliary epithelial cells.
• Utilizing the model for chemical screens to identify modulators of liver regeneration.

Main Results:

• Demonstration of extensive hepatocyte regeneration from biliary epithelial cells following severe hepatocyte loss in zebrafish.
• Validation of the pharmacogenetic approach for precise hepatocyte ablation.
• Establishment of a robust system for analyzing biliary-driven liver regeneration processes.

Conclusions:

• The described zebrafish model provides a crucial platform for investigating biliary-driven liver regeneration.
• This model system is instrumental for uncovering the mechanisms underlying BEC-driven hepatocyte generation.
• The methodology is applicable for high-throughput screening to identify therapeutic targets for liver regeneration.