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J Biochem Mol Toxicol. 2012 Mar-Apr;26(4):147-54. doi: 10.1002/jbt.20421. Epub 2012 Mar 23.

The effects of a low vitamin E diet on dichloroacetate- and trichloroacetate-induced oxidative stress in the livers of mice.

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  • 1College of Pharmacy and Pharmaceutical Sciences, The University of Toledo, Health Science Campus, Toledo, OH 43614-2598, USA.

Abstract

Groups of mice were fed either a standard (Std) diet or a diet not supplemented with vitamin E (Low-E) and were divided into three subgroups that were treated subchronically by gavage, with water (control), dichloroacetate (DCA), or trichloroacetate (TCA). The livers of the animals were assayed for various biomarkers of oxidative stress (OS), antioxidant enzyme activities, and total glutathione (GSH). In general, livers from the low-E diet group expressed lower levels of biomarkers of OS associated with greater increases in various antioxidant enzymes activities and GSH when compared with the corresponding treatments in the Std diet group. These results suggest that vitamin E supplementation to the diet, while essential to maintain certain body functions, can compromise the effectiveness of the hepatic antioxidant enzymes and GSH resulting in an increase in DCA- and TCA-induced OS and a possible increase in the compounds-induced hepatotoxic/hepatocarcinogenic effects in mice.

Copyright © 2012 Wiley Periodicals, Inc.

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