Abstract
We investigated the total urinary kallikrein levels, left-ventricular wall thickness and mean arterial blood pressure of nontreated and captopril-treated diabetic and nondiabetic spontaneously hypertensive rats. The mean arterial blood pressure was significantly elevated in diabetic spontaneously hypertensive rats as compared to nondiabetic spontaneously hypertensive rats. Captopril treatment caused a significant reduction in the arterial blood pressure of both nondiabetic and diabetic spontaneously hypertensive rats. The left-ventricular wall thickness was also significantly reduced in diabetic and nondiabetic spontaneously hypertensive treated with captopril as compared to nontreated diabetic and nondiabetic spontaneously hypertensive rats. The total urinary kallikrein levels were significantly raised in captopril-treated diabetic and nondiabetic spontaneously hypertensive rats against the values obtained from nontreated diabetic and nondiabetic spontaneously hypertensive rats. These results indicate that blood pressure reduction and left ventricular wall regression with captopril treatment might be due to enhanced renal kallikrein formation. The significance of these findings is discussed.
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