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  • Title: Intestinal glucose absorption is lower in obese than in lean Zucker rats.
    Author: García-Martínez C, López-Soriano FJ, Argilés JM.
    Journal: J Nutr; 1993 Jun; 123(6):1062-7. PubMed ID: 8505666.
    Abstract:
    Obese Zucker (fa/fa) rats had lower intestinal glucose absorption following an intragastric [U-14C]glucose load than lean (+/?) Zucker rats. In the fa/fa animals, the rate of oxidation of the tracer to 14CO2 was similar to that observed in their lean counterparts. Although there were no differences in the incorporation of the tracer in liver and skeletal muscle glycogen, the conversion and incorporation of [U-14C]glucose into tissue [14C]lipid was higher in the obese animals. Isolated enterocytes from lean and obese Zucker rats showed a similar capacity for [U-14C]glucose utilization. Reconstituted brush border membrane vesicles from obese Zucker rats showed a higher Vmax for glucose transport than those from their lean counterparts. The lower glucose absorption found in the fa/fa rats in vivo may contribute to the maintenance of normoglycemia in these animals.
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