Abstract
In adult female rats diabetic nephropathy was induced by i.v. administration of streptozotocin (6 mg/100 g b.w.). The animals survive for 3 weeks when very low daily doses of insulin (0.3 IU/animal) are administered. High blood urea concentrations and distinct proteinuria indicate the impairment of kidney function in streptozotocin diabetic rats. Streptozotocin induces mild polyuria and increased renal excretion of potassium; there is also an increase in renal excretion of administered p-aminohippurate. Three weeks after administration of streptozotocin the formation of lipid peroxides is increased in the kidney. At this time glutathione content (GSH, GSSG) is unchanged in liver and kidney of streptozotocin diabetic rats. Impairment of kidney function in streptozotocin diabetic rats can be prevented by daily supplementation with sufficient doses of insulin (about 3 IU/animal).
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