Abstract
Diabetic nephropathy (DN) is a leading disease that requires renal replacement therapy. The progression of renal dysfunction in DN is faster than the other renal diseases. While antihypertensive therapy reduces albuminuria, a good indicator for the progression, hypertension in DN is treatment resistant. Among patients with DN who took angiotensin receptor blockers (ARBs), 27 patients who exhibited poor control of albuminuria were enrolled into the study. Angiotensin receptor blocker was exchanged to aliskiren (150–300 mg/d) and clinical parameters were followed for 6 months. Exchange to aliskiren decreased albuminuria (1.57 ± 0.68 to 0.89 ± 0.45 g/gCr, P < .01) without changes in estimated glomerular filtration rate and office blood pressure (BP). Body weight and hemoglobin A1c were not altered. Aliskiren also reduced plasma renin activity (2.0 ± 0.9 to 1.2 ± 0.6 ng/mL/h, P < .01). While evening BP was unchanged, morning systolic BP (139 ± 8 to 132 ± 7 mm Hg, P < .01) and diastolic BP (81 ± 7 to 76 ± 6 mm Hg, P < .05) were decreased significantly after 6 months. Our results indicated that aliskiren decreased BP, especially morning BP in hypertensive patients with DN. The present data suggest that aliskiren exerts renoprotective actions including reduction in albumin excretion for patients with DN.
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