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A dog model for acetaminophen-induced fulminant hepatic failure
A Francavilla1, L Makowka, L Polimeno
1Department of Gastroenterology, University of Bari, Italy.
Gastroenterology
|February 1, 1989
Summary
A new canine model for fulminant hepatic failure using acetaminophen has been developed. This model shows high mortality and liver damage, proving useful for testing new therapies.
Area of Science:
- * Hepatology and Toxicology
- * Animal Models in Biomedical Research
Background:
- * Fulminant hepatic failure (FHF) is a critical clinical condition with limited treatment options.
- * Development of reliable animal models is crucial for evaluating potential therapies.
Purpose of the Study:
- * To establish a large animal model of FHF using acetaminophen in dogs.
- * To assess the model's utility in preclinical drug evaluation.
Main Methods:
- * Dogs received three subcutaneous injections of acetaminophen in dimethyl sulfoxide over 24 hours.
- * Dosage regimen: 750 mg/kg, followed by 200 mg/kg at 9 hours, and 200 mg/kg at 24 hours.
- * Control groups received vehicle injections; ranitidine was administered as a potential therapeutic agent.
Main Results:
- * Acetaminophen administration consistently induced FHF, with 90% mortality by 72 hours.
- * Histopathology revealed significant hepatocellular necrosis without major damage to other organs.
- * Ranitidine treatment significantly reduced mortality and liver necrosis.
Conclusions:
- * A reproducible canine model for acetaminophen-induced FHF has been successfully developed.
- * This model is suitable for evaluating therapeutic interventions for FHF.
- * The model meets established criteria for a large animal model of acute liver failure.
