The Korean Journal of Physiology and Pharmacology

The Korean Society of Pharmacology (대한약리학회)
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Reduction of Food Intake by Fenofibrate is Associated with Cholecystokinin Release in Long-Evans Tokushima Rats

  • Park, Mi-Kyoung (Department of Internal Medicine, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Han, Ying (Department of Internal Medicine, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Kim, Mi-Sun (Department of Internal Medicine, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Seo, Eun-Hui (Department of Pharmacology, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Kang, Soo-Jeong (Department of Pharmacology, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Park, So-Young (Department of Pharmacology, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Koh, Hyeong-Jong (Department of Pharmacology, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Kim, Duk-Kyu (Department of Internal Medicine, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine) ;
  • Lee, Hye-Jeong (Department of Pharmacology, Medical Science Research Center, Mitochondria Hub Regulation Center, Dong-A University College of Medicine)
  • Received : 2012.02.28
  • Accepted : 2012.05.29
  • Published : 2012.06.30
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Abstract

Fenofibrate is a selective peroxisome proliferator-activated receptor ${\alpha}$ ($PPAR{\alpha}$) activator and is prescribed to treat hyperlipidemia. The mechanism through which $PPAR{\alpha}$ agonists reduce food intake, body weight, and adiposity remains unclear. One explanation for the reduction of food intake is that fenofibrate promotes fatty acid oxidation and increases the production of ketone bodies upon a standard experimental dose of the drug (100~300 mg/kg/day). We observed that low-dose treatment of fenofibrate (30 mg/kg/day), which does not cause significant changes in ketone body synthesis, reduced food intake in Long-Evans Tokushima (LETO) rats. LETO rats are the physiologically normal controls for Otsuka Long-Evans Tokushima Fatty (OLETF) rats, which are obese and cholecystokinin (CCK)-A receptor deficient. We hypothesized that the reduced food intake by fenofibrate-treated LETO rats may be associated with CCK production. To investigate the anorexic effects of fenofibrate in vivo and to determine whether CCK production may be involved, we examined the amount of food intake and CCK production. Fenofibrate-treated OLETF rats did not significantly change their food intake while LETO rats decreased their food intake. Treatment of fenofibrate increased CCK synthesis in the duodenal epithelial cells of both LETO and OLETF rats. The absence of a change in the food intake of OLETF rats, despite the increase in CCK production, may be explained by the absence of CCK-A receptors. Contrary to the OLETF rats, LETO rats, which have normal CCK receptors, presented a decrease in food intake and an increase in CCK production. These results suggest that reduced food intake by fenofibrate treatment may be associated with CCK production.

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