Diabetes Care, Vol 17, Issue 5 420-424, Copyright © 1994 by American Diabetes Association

ARTICLES

Effects of long-term enalapril treatment on persistent micro-albuminuria in well-controlled hypertensive and normotensive NIDDM patients

T Sano, T Kawamura, H Matsumae, H Sasaki, M Nakayama, T Hara, S Matsuo, N Hotta and N Sakamoto
Department of Internal Medicine, Chubu-Rosai Hospital, Nagoya, Japan.

OBJECTIVE--To determine whether long-term treatment with an angiotensin-converting enzyme (ACE) inhibitor has a beneficial effect on the urinary microalbumin excretion and renal function in non-insulin-dependent diabetes mellitus (NIDDM) patients, enalapril (5 mg/day) was administered for 48 months. RESEARCH DESIGN AND METHODS---Fifty-two patients with NIDDM who had persistent microalbuminuria in the range of 20-300 mg/24 h, serum creatinine < 106.1 microM (1.2 mg/dl), supine systolic blood pressure (BP) < 150 mmHg, supine diastolic BP < 90 mmHg, and HbA1c < 10% were divided into four groups. Twenty-six patients with normotension were divided at random into two groups; one group received enalapril (5 mg/day) (NE group), the other did not receive enalapril (NC group). In the same way, 26 other patients who were already well-controlled with nifedipine (30 mg/day) over a long-term period (4-6 years) were divided at random into two groups; one received enalapril (5 mg/day) (HE group), the other did not receive enalapril (HC group). RESULTS--After 48 months, urinary albumin excretion (UAE) was markedly reduced in group NE from 102.4 x/divided by 1.3 to 55.5 x/divided by 1.3 mg/24 h (P < 0.005), whereas no significant change occurred in group NC. In the well-controlled hypertensive groups, a significant reduction in UAE occurred in group HE (P < 0.05), whereas no significant change occurred in group HC. No changes in creatinine clearance, BP, or blood glucose control were seen during the study. CONCLUSIONS--Treatment with enalapril for 48 months may have a beneficial effect on the decline of microalbumin excretion in NIDDM patients.
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