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Effect of dietary vitamin E on expiration of pentane and ethane by the rat

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Lipids

Abstract

An analytical method for the measurement of hydrocarbon gases in the breath of rats is described. The method was used to follow the expiration in rat breath of in vivo formed scission products of hydroperoxides. The major products are pentane from the linoleic acid family and ethane from the linolenic acid family. Rats were fed 0, 11 or 40 i.u. vitamin E acetate/kg diet for 7 wk starting at age 21 days. Data obtained by gas chromatographic analysis of breath samples were analyzed by the Mann-Whitney nonparametricU-test. This statistical analysis showed that pentane evolved by the group of rats not supplemented with vitamin E was significantly higher during the period 1–7 wk than that evolved by either of the two supplemented groups of rats. Ethane from the nonsupplemented group was significantly higher than that from the group supplemented with 40 i.u. vitamin E/kg of diet by 5 wk, and significantly higher than both supplemented groups by 6 wk. By 7 wk, pentane production was tenfold greater in the nonsupplemented group than in either supplemented group, and ethane was about twofold greater. There was no significant difference between the groups supplemented with 11 and 40 i.u. vitamin E/kg diet for either ethane or pentane. This new technique, which measures scission products from in vivo lipid peroxidation, promises to be useful for application to many experimental areas where lipid peroxidation is expected or known to occur.

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Authors and Affiliations

  1. Department of Food Science and Technology, University of California, 95616, Davis, California

    Cora J. Dillard, Erich E. Dumelin & Al L. Tappel

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  1. Cora J. Dillard
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  2. Erich E. Dumelin
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  3. Al L. Tappel
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Dillard, C.J., Dumelin, E.E. & Tappel, A.L. Effect of dietary vitamin E on expiration of pentane and ethane by the rat. Lipids 12, 109–114 (1977). https://doi.org/10.1007/BF02532981

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  • DOI: https://doi.org/10.1007/BF02532981

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