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Abstract
The effect of streptozotocin (STZ) treatment on blood pressure in adult spontaneously hypertensive rats (SHR) was compared with that in neonatal SHR. Three-month-old SHR were intravenously given 10, 30 or 50 mg/kg of STZ. When STZ was given in adult SHR, weight loss, overt hyperglycemia and the reduction of blood pressure occurred dose dependently. Two-day-old pups from SHR were subcutaneously injected with 100 mg/kg of STZ. Neonatal STZ treatment did not attenuate the development of hypertension in SHR. Since neonatally STZ-treated SHR develop mild diabetic symptom with hypertension and develop mild diabetic glomerulosclerosis, they are a good model for studying vascular complications or other disorder relating to the synergism between hypertension and diabetes mellitus.