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Modeling liver fibrosis in rodents
Christothea Constandinou1, Neil Henderson, John P Iredale
1University of Southampton, Southampton General Hospital, Southampton, UK.
Methods in Molecular Medicine
|August 25, 2005
Summary
Carbon tetrachloride (CCl4) intoxication in rodents is a well-established model for studying liver fibrosis progression and recovery. This model allows detailed examination of cellular and molecular changes, providing key insights into hepatic fibrosis mechanisms.
Area of Science:
- Hepatology and Toxicology
- Animal Models of Disease
Background:
- Hepatic fibrosis research relies on animal models to investigate cellular and molecular mechanisms of liver disease progression and recovery.
- Several methods exist for inducing liver fibrosis in animal models.
Purpose of the Study:
- To highlight the utility of carbon tetrachloride (CCl4) intoxication in rodents as a well-characterized model for studying hepatic fibrosis.
- To detail the progression of fibrosis, from initial injury to cirrhosis, and the potential for spontaneous recovery within this model.
- To emphasize the model's suitability for mechanistic studies using genetic manipulation (gene knockout and transgenic animals).
Main Methods:
- Induction of hepatic fibrosis in rats and mice via intraperitoneal injection or oral gavage of carbon tetrachloride (CCl4).
- Repetitive dosing protocols to induce varying degrees of fibrosis, including bridging fibrosis, cirrhosis, and advanced micronodular cirrhosis.
- Assessment of histological, biochemical, cellular, and molecular changes associated with CCl4-induced liver injury and fibrosis.
Main Results:
- CCl4 intoxication reliably induces zone III necrosis and hepatocyte apoptosis, leading to hepatic stellate cell activation and subsequent fibrosis.
- Dose-dependent induction of fibrosis allows for the study of bridging fibrosis (4 weeks), cirrhosis (8 weeks), and advanced cirrhosis (12 weeks).
- Spontaneous recovery from fibrosis can be observed and studied following cessation of CCl4 administration.
Conclusions:
- The CCl4 model is the most extensively studied and characterized animal model for hepatic fibrosis.
- This model provides a robust platform for investigating the mechanisms of fibrosis development, progression, and spontaneous regression.
- The CCl4 model is amenable to advanced mechanistic studies, including the use of genetically modified animals, offering unparalleled insights into hepatic fibrosis.