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  • Title: Effect of swimming exercise and ethanol on rat liver P450-dependent monooxygenases.
    Author: Ardies CM, Zachman EK, Koehn BJ.
    Journal: Med Sci Sports Exerc; 1994 Dec; 26(12):1453-8. PubMed ID: 7869878.
    Abstract:
    The interactive effects of 6 wk of repeated swimming exercise and chronic ethanol consumption (36% of total calories) on the hepatic cytochrome P450-dependent monooxygenase system were studied utilizing four groups of male rats in a 2 x 2 factorial design. The sedentary-control (S/C), sedentary-ethanol (S/E), and swim-control (SW/C) groups received the same amount of food that the swim-ethanol (SW/E) group consumed. The swimming groups were trained to swim for 2 h.d-1, 5 d.wk-1. Significant main effects due to ethanol (P < 0.002) and exercise (P < 0.02) were observed for the enhanced cytochrome P450 content and cytochrome P450 reductase activity, respectively. In addition, significant main effects for ethanol (P < 0.001), exercise (P < 0.0001), and significant interaction effects (P < 0.005) on aniline p-hydroxylase activity and significant main effects for ethanol (P < 0.01), exercise (P < 0.01), and interaction effects (P < 0.04) on 7-ethoxycoumarin o-deethylase activity were observed. Because the SW/C treatment had no effect on any of the measured cytochrome P450 activities and the SW/E treatment enhanced P450 activities much more than the S/E treatment, the main effects observed for exercise are accounted for by the alterations produced by combining swimming with the ethanol treatment. Based on these results, repeated exercise combined with ethanol consumption produces a synergistic increase in ethanol-inducible cytochrome P450-dependent activities.
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