Increased Stearoyl-CoA Desaturase Index and Triglyceride Content in the Liver of Rats after a Single Bout of Swimming Exercise

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  • OCHIAI Masaru
    Faculty of Agriculture, Kagawa University Faculty of Agriculture, Kagawa University
  • MATSUO Tatsuhiro
    Faculty of Agriculture, Kagawa University Faculty of Agriculture, Kagawa University

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Up-regulation of stearoyl-CoA desaturase (SCD) is closely related to improved insulin resistance. We investigated whether the SCD indices in tissues were influenced by a single-endurance exercise and low content of dietary medium-chain fatty acid (FA). Wistar rats were fed a long-chain (S) or medium- and long-chain FA (M) diet for 2 weeks. At the end of the experiment, the rats were further assigned to two sub-groups (sedentary, Sed; exercise, Ex). These groups were defined as S-Sed, S-Ex, M-Sed, and M-Ex. The rats in the exercise groups were subjected to swimming exercise for 4 h, and tissue samples were obtained. The exercise significantly increased the triglyceride (TG) content and SCD index only in the liver. In contrast, no such changes were apparent by intake of the M diet. A single bout of endurance exercise increased the hepatic TG content and SCD index which might be effective in protecting against insulin resistance.

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