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  • Title: Effect of diabetes on natriuresis in the presence of ouabain and ethacrynic acid in perfused rat kidney.
    Author: Bikhazi AB, Shukri RP.
    Journal: Comp Biochem Physiol A Comp Physiol; 1987; 87(4):1063-6. PubMed ID: 2887371.
    Abstract:
    1. The effect of diabetes on renal sodium retention was investigated. 2. The technique involved retrograde perfusion from the renal veins via the kidneys, and then through the renal arteries and dorsal aorta. 3. Sodium retention by diabetic rat kidney was 58% lower than that in the normal rats. 4. Ouabain (15 mM) in perfusate increased sodium retention by 30% in normal rat kidney as compared to a 54% increase in diabetic rat kidney. 5. Ethacrynic acid (1 mM) in perfusate resulted in a 42% reduction in sodium retention in the normal rat kidney as compared to a 43% decrease in the diabetic rat kidney. 6. Control of hyperglycemia in diabetic rats with insulin therapy resulted in sodium retention that is not significantly different from that of normal rats. 7. The results suggest that diabetes has no effect on the peritubular ouabain-sensitive Na--K-ATPase pump, or the luminal ethacrynic acid-sensitive Na-K counter transport pump. Furthermore, the data suggest a reversible effect of diabetes on sodium retention during insulin therapy.
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