Summary
To prove the function of isolated transplanted hepatocytes in acute liver failure we tried to establish a hepatic failure model in pigs which correlates to a clinical situation. In 12 pigs we administered 500–2000 mg acetaminophen/kg b.wt. after enzyme induction with pentobarbital. Seven animals receiving 500–1000 mg/kg survived the intoxication. Five animals receiving 1000–2000 mg/kg acetaminophen died within 6.5 h after intoxication because of methemoglobinemia.
A close correlation between administered dosage of the drug, acetaminophen blood levels, and methemoglobinemia was found. Histology of surviving animals showed a dosage-dependent cell necrosis.
A standardized hepatic failure model could not be established in pigs by acetaminophen intoxication because dosages of less than 1000 mg/kg were survived. In dosages higher than 1000 mg/kg a side-effect of the acetaminophen intoxication, i.e., methemoglobinemia, limited the life of the animals. Therefore, acetaminophen cannot be used to induce acute hepatic failure in pigs.
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Henne-Bruns, D., Artwohl, J., Broelsch, C. et al. Acetaminophen-induced acute hepatic failure in pigs: Controversical results to other animal models. Res. Exp. Med. 188, 463–472 (1988). https://doi.org/10.1007/BF01852004
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DOI: https://doi.org/10.1007/BF01852004