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  • Title: Effect of insulin pump therapy on blood pressure and the renin-angiotensin system of diabetic rats.
    Author: Hartmann JF, Chen SL, Szemplinski M, Slater EE.
    Journal: Horm Metab Res; 1990 Mar; 22(3):141-4. PubMed ID: 2188897.
    Abstract:
    Insulin therapy, administered by continuous subcutaneous infusion with osmotic pumps over a 28 day period at doses of 2.5 and 5.0 units/day, resulted in a statistically significant increase in body weight of diabetic rats. The concentration of blood glucose was reduced by 68% to 109 mg/dl blood sugar by the higher dose of insulin and only partial control of diabetes was achieved by the lower dose (185 mg/dl blood sugar, -39%). Blood pressure was normalized by both doses of insulin. Elevated serum angiotensin converting enzyme activity and plasma renin activity, expressed as generated angiotensin I, were unaffected by the lower dose of insulin, but were reduced by 26% and 40%, respectively at the higher dose. These data suggest that elevated serum ACE and plasma renin activity, commonly found in the streptozotocin-diabetic rat, may not be primarily responsible for hypertension in this model.
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