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      Carbohydrate Metabolism in Potassium-Depleted Rats

      a , a , b


      S. Karger AG

      Insulin, Liver, Potassium depletion, Glycogen, Lactate, Skeletal muscle

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          Carbohydrate metabolism was examined in different organs of rats with dietary potassium deprivation for 4 weeks. Thereafter, a 24- or 48-hour starvation period caused a significant decrease of skeletal muscle and liver glycogen content in K<sup>+</sup>-depleted (KD) rats, whereas kidney glycogen concentration increased and heart glycogen remained unchanged. In contrast, liver glucose concentration was significantly higher in starved KD animals without changes in muscle, heart, and kidney glucose concentrations. Potassium depletion caused a highly significant decrease of plasma and muscle potassium concentrations, metabolic alkalosis, reduced plasma insulin, and increased creatine phosphokinase levels. Blood lactate, pyruvate, and oxoglutarate levels were significantly enhanced in fasted KD rats, whereas blood citrate, β-hydroxybutyrate, and glucose concentrations were unchanged. Blood acetoacetate level, however, was significantly reduced following potassium depletion. Therefore, β-hydroxybutyrate/acetoacetate ratio increased significantly, whereas lactate/pyruvate ratio was not influenced. Our results clearly indicate impaired carbohydrate metabolism in potassium-depleted rats.

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          Author and article information

          S. Karger AG
          04 December 2008
          : 41
          : 1
          : 100-109
          aDepartment of Internal Medicine, University of Würzburg, and bDepartment of Internal Medicine, University of Freiburg, FRG
          183555 Nephron 1985;41:100–109
          © 1985 S. Karger AG, Basel

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          Page count
          Pages: 10
          Original Paper

          Cardiovascular Medicine, Nephrology

          Glycogen, Liver, Insulin, Potassium depletion, Skeletal muscle, Lactate


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