Inhibitory action of gemfibrozil on cholesterol absorption in rat intestine

Journal of Lipid Research

Mitsunobu Kawamura¹  Mitsuru Seishima²  Yoh Umeda³  Yohji Iikura⁴  Yuko Kako⁴  Kayo Mizutani⁴  Hiroshi Hayashi⁵ 

[1] Department of Endocrinology and Metabolism, Tokyo Teishin Hospital, Yokohama, Japan 231-0836;Department of Laboratory Medicine, School of Medicine, Gifu University, Yokohama, Japan 231-0836;Department of Pediatrics, Showa General Hospital, Yokohama, Japan 231-0836;Department of Pediatrics, Showa University Hospital, Yokohama, Japan 231-0836;To whom correspondence should be addressed.;

关键词: fibrates;    mesenteric lymph-fistula;    Sprague-Dawley rats;    triglyceride;    lymph transport;    biliary cholesterol;   

DOI  :  

来源: DOAJ

【 摘 要 】

This study was designed to determine whether gemfibrozil inhibits intestinal lipid absorption. Male Sprague-Dawley rats received an oral dose of 30 mg gemfibrozil/kg body weight for 14 days. Mesenteric lymph cannulation was performed, and a lipid infusion containing 40 μmol/h (35.4 mg/h) of radiolabeled triolein and 2.74 μmol/h (1.06 mg/h) of radiolabeled cholesterol with the addition of 1 mg/h of gemfibrozil was infused intraduodenally at a rate of 3 ml/h for 8 h. The lymph was collected, and the radioactivity levels of the lumen and gut mucosa were measured after the infusion. Lymph cholesterol transport was depressed in gemfibrozil-treated rats, in terms of mass measurements as well as radioactivity in a lesser degree. More radioactive cholesterol remained in the proximal portion of the intestinal lumen and mucosa in the treated rats than in the control rats. More radioactive triglycerides also remained in the proximal intestinal lumen of treated rats, although no difference in lymphatic triglyceride transport was observed between the groups. A significant portion of the radioactive cholesterol remained in the lumen in the gemfibrozil-treated rats. Gemfibrozil increased biliary cholesterol excretion. Thus, this study shows that gemfibrozil inhibits cholesterol absorption in rat intestine. —Umeda, Y., Y. Kako, K. Mizutani, Y. Iikura, M. Kawamura, M. Seishima, and H. Hayashi. Inhibitory action of gemfibrozil on cholesterol absorption in rat intestine.

【 授权许可】

Unknown