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[Paracetamol poisoning in a swine model]
D Henne-Bruns1, J Artwohl, L Dziwisch
1Chirurgische Universitätsklinik Hamburg.
Zeitschrift Fur Experimentelle Chirurgie, Transplantation, Und Kunstliche Organe : Organ Der Sektion Experimentelle Chirurgie Der Gesellschaft Fur Chirurgie Der DDR
|January 1, 1988
Summary
Acetaminophen overdose in pigs did not create a reliable acute liver failure model. Methemoglobinemia, a side effect, limited survival, preventing effective study of acetaminophen-induced liver failure.
Area of Science:
- Hepatology
- Toxicology
- Animal Models
Background:
- Acute liver failure (ALF) poses significant clinical challenges.
- Hepatocyte transplantation is a potential therapeutic strategy for ALF.
- Establishing reliable animal models is crucial for studying ALF and its treatments.
Purpose of the Study:
- To establish a porcine model of acute liver failure using acetaminophen intoxication.
- To evaluate the feasibility of using acetaminophen to induce ALF in pigs for future hepatocyte transplantation studies.
Main Methods:
- Twelve pigs were administered acetaminophen (500-2000 mg/kg) after enzyme induction with Pentobarbital.
- Acetaminophen dosage, blood levels, and methemoglobinemia were monitored.
- Histological analysis was performed on surviving animals.
Main Results:
- Doses of 500-1000 mg/kg acetaminophen were survived by 7 pigs.
- Doses of 1000-2000 mg/kg acetaminophen resulted in death within 6.5 hours due to methemoglobinemia.
- A correlation was observed between acetaminophen dosage, blood levels, and methemoglobinemia.
- Histology revealed dose-dependent hepatocyte necrosis in survivors.
Conclusions:
- Acetaminophen intoxication in pigs is not a suitable method for establishing a standardized acute liver failure model.
- Methemoglobinemia, an acetaminophen side effect, limits animal survival at higher doses, confounding ALF induction.
- Further research is needed to develop alternative porcine models for ALF studies.