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Raymond P, Plaa GL. Effect of dosing vehicle on the hepatotoxicity of CCl4 and nephrotoxicity of CHCl3 in rats. J Toxicol Environ Health. 1997;51(5):463-76doi: 10.1080/00984109708984037.
Raymond, P., & Plaa, G. L. (1997). Effect of dosing vehicle on the hepatotoxicity of CCl4 and nephrotoxicity of CHCl3 in rats. Journal of toxicology and environmental health, 51(5), 463-76. https://doi.org/10.1080/00984109708984037
Raymond, P, and Plaa, G L. "Effect of dosing vehicle on the hepatotoxicity of CCl4 and nephrotoxicity of CHCl3 in rats." Journal of toxicology and environmental health vol. 51,5 (1997): 463-76. doi: https://doi.org/10.1080/00984109708984037
Raymond P, Plaa GL. Effect of dosing vehicle on the hepatotoxicity of CCl4 and nephrotoxicity of CHCl3 in rats. J Toxicol Environ Health. 1997 Aug 08;51(5):463-76. doi: 10.1080/00984109708984037. PMID: 9233380.
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J Toxicol Environ Health. 1997 Aug 08;51(5):463-76. doi: 10.1080/00984109708984037.

Effect of dosing vehicle on the hepatotoxicity of CCl4 and nephrotoxicity of CHCl3 in rats.

Journal of toxicology and environmental health

P Raymond, G L Plaa

Affiliations

  1. Department of Pharmacology, Faculty of Medicine, University of Montreal, Quebec, Canada.

PMID: 9233380 DOI: 10.1080/00984109708984037

Abstract

There are conflicting results in the literature concerning the effect of gavage vehicle, corn oil (CO) versus aqueous suspension, on the toxicity of haloalkanes. The purpose of our study was to assess the influence of oral dosing vehicle on the acute hepatotoxicity of CCl4 and nephrotoxicity of CHCl3. Male Sprague-Dawley rats, fed ad libitum, were treated (po) with single doses of CCl4 or CHCl3 using corn oil (CO), or an aqueous preparation (5%) of Emulphor (EL620) or Tween-85 (Tw-85) as vehicle (10 ml/kg). Rats were killed 48 h after treatment. Blood was collected for plasma alanine aminotransferase (ALT) determination and renal cortical slices were prepared for p-aminohippuric acid (PAH) incorporation. The comparison, between gavage vehicles, of the slopes and ED50 of the dose-response curves, although not significantly different, indicated clear trends for enhanced potency with CO for CHCl3 nephrotoxicity but not for CCl4 hepatotoxicity. However, ALT values, a measure of the severity of effect for CCl4, also indicated that CO, when compared to EL620 and Tw-85, tended to enhance CCl4 hepatotoxicity at low toxicity incidence. Furthermore, CO clearly enhanced the severity of effect for CHCl3 nephrotoxicity, as measured by the slice-to-medium PAH ratios, at high dosage. The greater severity of the lesion produced by exposure to these chemicals, when administered in CO, is consistent with the trends observed for their potency (dose-response curves). Our results agree with an increased toxicity of haloalkanes by the gavage vehicle CO reported in the literature. Thus, CO should be considered a potential confounder in hepato- and nephrotoxicity assays.

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