Effects of captopril treatment versus placebo on renal function in type 2 diabetic patients with microalbuminuria: a long-term study.
We evaluated the renal effect of long-term antihypertensive treatment (12 months) with the angiotensin-converting enzyme inhibitor captopril compared to placebo in 15 type 2 diabetic patients with microalbuminuria. The patients were randomly allocated to captopril (n = 9) or placebo (n = 6). After 1-year therapy no significant decrease in blood pressure was demonstrated with captopril (139 +/- 17/80 +/- 9 versus 138 +/- 13/76 +/- 6 mmHg) or placebo (138 +/- 9/75 +/- 6 versus 135 +/- 14/79 +/- 10 mmHg). Only in a small hypertensive subgroup (n = 4) treated with captopril did we find a significant reduction in blood pressure (154 +/- 2/88 +/- 1 versus 142 +/- 7/78 +/- 5 mmHg, P < 0.05). The urinary albumin excretion rate did not change significantly either in the captopril group (95.6 mg/24 h, 25th percentile 138.4, 75th percentile 25.1; versus 127.8 mg/24 h, 25th percentile 29.3, 75th percentile 222) or in the placebo group (99.2 mg/24 h, 25th percentile 58.5, 75th percentile 125.8; versus 120.9 mg/24 h, 25th percentile 62.1, 75th percentile 179.7). There were also no alterations in renal blood flow or filtration rate. In the hypertensive subgroup treated with captopril a reduction in urinary albumin excretion rate after 3 and 6 months of treatment was observed (captopril 73.4 versus 24 and 41 mg/24 h, P < 0.05), but not after 12 months. Triglyceride and cholesterol levels remained constant before and after treatment while glycosylated hemoglobin decreased significantly after 12 months captopril (7.8 +/- 0.9 versus 6.9 +/- 0.7 mg%, P < 0.03).(ABSTRACT TRUNCATED AT 250 WORDS)
Capek
M
M
Universitätsklinik für Innere Medizin 3, Universität Wien, Austria.
Schnack
C
C
Ludvik
B
B
Kautzky-Willer
A
A
Banyai
M
M
Prager
R
R
D000368:Aged; D000419:Albuminuria / Q000209:etiology*; D002216:Captopril / Q000627:therapeutic use*; D003924:Diabetes Mellitus, Type 2 / Q000150:complications / Q000188:drug therapy*; D003928:Diabetic Nephropathies / Q000188:drug therapy* / Q000652:urine; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010919:Placebos
D010919:Placebos; D002216:Captopril