Journal
KIDNEY & BLOOD PRESSURE RESEARCH
Volume 30, Issue 4, Pages 203-211Publisher
KARGER
DOI: 10.1159/000104089
Keywords
type 2 diabetic nephropathy; pioglitazone; losartan; proteinuria; end-stage renal disease
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Aim: This study was performed to ascertain whether losartan combined with pioglitazone is superior to losartan alone in delaying the progression of chronic renal failure in patients with type 2 diabetic nephropathy. Methods: Sixty patients with type 2 diabetic nephropathy ( stage 3 or 4 chronic kidney disease) were enrolled in a randomized, controlled trial. Thirty patients received losartan ( 100 mg/ day) and pioglitazone ( 30 mg/ day), and 30 patients received losartan only ( 100 mg/ day). The patients were assessed at baseline and at 3- month intervals for 24- hour urinary protein excretion, serum creatinine, creatinine clearance, and fasting blood glucose values. The glomerular filtration rate was measured by means of a (99m) Tc- diethylenetriamine penta- acetic renogram at baseline and after 12 months. Results: As compared with therapy with losartan alone, the losartan- pioglitazone combination therapy resulted in significantly lower serum creatinine and fasting glucose values at 12 months and in significantly lower degrees of proteinuria at 6 and 12 months. The declines in creatinine clearance and glomerular filtration rate below baseline measurements at stages 3 and 4 of chronic kidney disease were significantly slower for the losartan- pioglitazone group as compared with the losartan- only group. Conclusions: Renoprotection conferred by losartan combined with pioglitazone is superior to that conferred by losartan alone in subjects with type 2 diabetic nephropathy. The combination is generally well tolerated.
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