title: Serum angiotensin-converting enzyme activity and active renin plasma concentrations in insulin-dependent diabetes mellitus.
abstract: We report here the alterations of serum angiotensin-converting enzyme activity (S-ACE) and of active renin plasma concentrations (ARPC) in 41 insulin-dependent diabetes mellitus (IDDM) patients compared with those of 26 control subjects. The IDDM patients had S-ACE activity (54 +/- 16 I.E.) in the upper normal range (controls, 39 +/- 7). When the patients were subclassified according to their diabetic complications, a significant increase of S-ACE within the IDDM group compared to the controls was observed in patients with nephropathy (68 +/- 13, P less than 0.001) with persistent proteinuria and with retinopathy (63 +/- 14, P less than 0.001). A significant correlation was found between proteinuria and S-ACE (r = 0.98, P less than 0.001) and between retinopathy and S-ACE levels (r = 64, P less than 0.001). No correlation between blood pressure and S-ACE or between blood glucose and S-ACE was observed. The ARPC were within the normal range in the IDDM (21 +/- 9 ng/l) and in control (19 +/- 3) groups. No correlations between ARPC and blood pressure or blood glucose or the degree of diabetic complications were registered. These data show that S-ACE activity is elevated in IDDM patients with nephropathy-proteinuria and/or with retinopathy and the circulating renin may not represent the renal renin-angiotensin vascular system.
authors.affiliation: Department of Internal Medicine I, University of Ulm, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Duntas
authors.forename: F S
authors.initials: FS
authors.lastname: Keck
authors.forename: C
authors.initials: C
authors.lastname: Haug
authors.forename: W
authors.initials: W
authors.lastname: Hetzel
authors.forename: C F
authors.initials: CF
authors.lastname: Wolf
authors.forename: J
authors.initials: J
authors.lastname: Rosenthal
authors.forename: E F
authors.initials: EF
authors.lastname: Pfeiffer
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000032:analysis; D001794:Blood Pressure; D003922:Diabetes Mellitus, Type 1 / Q000097:blood* / Q000201:enzymology / Q000503:physiopathology; D003928:Diabetic Nephropathies / Q000097:blood / Q000503:physiopathology; D003930:Diabetic Retinopathy / Q000097:blood / Q000503:physiopathology; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D008297:Male; D007703:Peptidyl-Dipeptidase A / Q000097:blood*; D011507:Proteinuria; D012016:Reference Values; D012044:Regression Analysis; D012083:Renin / Q000097:blood*
chemical_list: D001786:Blood Glucose; D006442:Glycated Hemoglobin; D007703:Peptidyl-Dipeptidase A; D012083:Renin