PMID: 8937898Nov 1, 1996Paper

Comparison of the hepatotoxicity of coumarin in the rat, mouse, and Syrian hamster: a dose and time response study

Fundamental and Applied Toxicology : Official Journal of the Society of Toxicology
B G Lake, P Grasso

Abstract

The effects of coumarin treatment have been compared in male Sprague-Dawley CD rats, male CD-1 mice, and male Syrian hamsters. Rats were fed 0-0.75% coumarin for 1 and 4 weeks and 0-0.5% coumarin for 13 weeks, whereas mice and Syrian hamsters were fed 0-0.5 and 0-1.0% coumarin, respectively, for periods of 1, 4, and 13 weeks. In the rat, coumarin produced dose-related hepatotoxic effects which included vacuolar degeneration, apoptosis, and bile duct proliferation. These effects were particularly marked at dose levels of 0.3 and 0.5%, where liver tumors have been observed in a chronic study. Coumarin administration to rats also increased serum bilirubin content and both serum and hepatic gamma-glutamyltransferase activity. While levels of hepatic total glutathione were increased by coumarin administration, microsomal cytochrome P450 content and ethylmorphine N-demethylase activity were reduced. Such effects were either less marked or absent in the mouse and Syrian hamster. Replicative DNA synthesis was studied by implanting osmotic pumps containing 5-bromo-2'-deoxyuridine during Study Weeks 0-1, 3-4, and 12-13. In the rat, coumarin administration for 4 and 13 weeks at dose levels of 0.3 and 0.5% produced a sustained stimulation ...Continue Reading

Citations

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