CLINICAL TRIAL
COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Effects of angiotensin converting enzyme inhibitor on renal function in patients of membranoproliferative glomerulonephritis with mild to moderate renal insufficiency.

AIM: To determine the effect of enalapril, angiotensin-converting-enzyme inhibitor (ACE-I) on progression of renal insufficiency in primary membranoproliferative glomerulonephritis with mild to moderate renal insufficiency.

METHOD: Thirty patients with histopathologically proved MPGN having hypertension (grade I and II of JNC-VI criteria of hypertension) and mild to moderate impairment of renal function (creatinine clearance varying from 30-80 ml/min, significant albuminuria and serum creatinine 1.2-3.0 mg/dl) were initially treated with diuretics and 3-blockers to bring down BP < 140/90 mm Hg. These patients were then randomly divided into three groups of 10 each, group I--Control; group II--Nifedipine and group III--Enalapril. In group II and III Nifidepine 30 mg/day and in group III Enalapril 10 mg/day respectively were added in addition and treatment was continued for nine months. These patients were followed up monthly for drug efficacy, side effects and any adverse drug reaction.

RESULTS: Out of 30, 28 patients completed the study. At the end of nine months of treatment the patients of control group revealed significant increase in serum creatinine (1.65 +/- 0.38 to 2.17 +/- 0.31 mg/dl), blood urea (34.0 +/- 3.9 to 40.0 +/- 3.1 mg/dl), and 24 hours albuminuria (3.6 +/- 0.6 to 4.2 +/- 0.6 gm) and decrease in creatinine clearance (60.3 +/- 13.3 to 37.5 +/- 11.8 m/min); however, in enalapril group there was decrease in serum creatinine (1.72 +/- 0.45 to 1.24 +/- 0.58 mg/dl), blood urea (34.6 +/- 4.7 to 28.1 +/- 6.7 mg/dl) and 24 hours albuminuria (3.3 +/- 1.0 to 1.6 +/- 1.1 gm) and increase in creatinine clearance (56A +/- 15.8 to 77.1 +/- 23.5 ml/min). The patients on nifedipine showed statistically nonsignificant changes in creatinine clearance, blood urea and serum creatinine; while albuminuria increased from 3.0 +/- 1.3 to 3.9 +/- 0.4 gm/24 hours (p < 0.01). The blood pressure was well controlled in all patients. None of the patient had side effects leading to withdrawal of drugs. No adverse drug reaction was noted.

CONCLUSION: ACE-I (enalapril) provided protection against the progression of renal insufficiency in patients of MPGN having hypertension with mild to moderate renal impairment. The renoprotective effects of ACE inhibitor (enalapril) is associated with substantial decrease in albuminuria.

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