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  • Title: Renal responses to angiotensin II infusion in early type 1 (insulin-dependent) diabetes.
    Author: Eadington DW, Swainson CP, Frier BM, Semple PF.
    Journal: Diabet Med; 1991 Jul; 8(6):524-31. PubMed ID: 1832351.
    Abstract:
    The renal response to infusion of sub-pressor doses of angiotension II was examined in nine euglycaemic Type 1 (insulin-dependent) diabetic patients with diabetes of short duration and nine non-diabetic control subjects. Plasma concentrations of angiotensin II and of free insulin were similar in both groups at baseline and during angiotensin II infusion. Glomerular filtration rate (Inutest clearance) fell to a similar extent during angiotensin II infusion in both groups (diabetic 116(SE 5) to 102(5) ml min-1 1.73-m-2; control 113(6) to 100(5) ml min-1 1.73-m-2). There was a large dose-dependent fall in effective renal plasma flow (p-aminohippurate clearance) during angiotensin II infusion which was of similar magnitude in both groups (diabetic; 694(46) to 521(21) ml min-1 1.73-m-2; control 665(41) to 498(30) ml min-1 1.73-m-2). The absolute and the fractional rates of urinary excretion of sodium were both lower in the diabetic group throughout the study, but there was a comparable antinatriuretic response to angiotensin II. Thus, the renal haemodynamic response to angiotensin II infusion is normal in early well-controlled Type 1 diabetes. Differences were found in the renal handling of sodium, which could not be related to altered renal tubular responses to angiotensin II or to peripheral hyperinsulinaemia.
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