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Can murine diabetic nephropathy be separated from superimposed acute renal failure?

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Can murine diabetic nephropathy be separated from superimposed acute renal failure?

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GROUND: Streptozotocin (STZ) is commonly used to induce diabetes in experimental animal models, but not without accompanying cytotoxic effects. This study was undertaken to (1) determine an optimal dose and administration route of STZ to induce diabetic nephropathy in wild-type mice but without the concurrent acute renal injury resulting from cytotoxic effects of STZ and (2) evaluate the pattern of tubular injury and interstitial inflammation in this model. METHODS: Male Balb/c mice received either (1) STZ (225 mg/kg by intraperitoneal injection.); or (2) two doses of STZ 5 days apart (150 mg/150 mg/kg; 75 mg/150 mg/kg; 75 mg/75 mg/kg; and 100 mg/100 mg/kg by intravenous injection). Another strain of mice, C57BL/6J, also received STZ (200 mg/kg intravenously or intraperitoneally). Renal function and histology were examined at weeks 1, 2, 4, and 8 after induction of diabetes. In initial optimization studies, animals were sacrificed at week 1 or week 2 and histology examined for acute re

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