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Role of metabolic control on diabetic nephropathy

DOI: 10.1590/S0102-86502002000600003

Keywords: experimental diabetes, alloxan, diabetic, nephropathy, rats.

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objective: the aim of this investigation was studying the influence of glucose metabolic control on diabetic nephropathy. the authors observed the effect of acarbose, insulin, and both drugs on the metabolic control and development of mesangial enlargement of kidney glomeruli in alloxan-diabetic rats. methods: five groups of wistar rats were used: normal rats (n), non-treated alloxan-diabetic rats (d), alloxan-diabetic rats treated with acarbose (ad), alloxan-diabetic rats treated with insulin (id), and alloxan-diabetic rats treated with insulin plus acarbose (iad). the following parameters were evaluated: body weight; water and food intake; diuresis; blood and urine glucose levels; and the kidney lesions: mesangial enlargement and tubule cell vacuolization. renal lesions were analysed using a semi-quantitative score 1, 3, 6, 9, and 12 months after diabetes induction. results: diabetic rats showed a marked increase of glycemia, urinary glucose levels, diuresis, water and food intake, and weight loss, while the treated diabetic rats showed significant decreased levels of these parameters. the most satisfactory metabolic control was that of diabetic rats treated with acarbose + insulin. there was a significant mesangial enlargement in diabetic rats compared to normal rats from the third up to the 12th month after diabetes induction, with a significant difference between the animals treated with acarbose + insulin and non-treated diabetic rats. a difference between the animals treated with acarbose or insulin alone and non-treated diabetics rats was not seen. conclusions: the authors discuss the results stressing the role of diabetic metabolic control in the prevention of diabetic nephropathy.


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