Combination therapy with renin-angiotensin system inhibitors and the calcium channel blocker azelnidipine decreases plasma inflammatory markers and urinary oxidative stress markers in patients with diabetic nephropathy

Hypertension Research : Official Journal of the Japanese Society of Hypertension
Susumu OgawaSadayoshi Ito

Abstract

A calcium channel blocker (CCB), azelnidipine (AZ), is reported to inhibit oxidative stresses, particularly when administered under blockade of the renin-angiotensin system (RAS). The purpose of this study was to investigate whether AZ inhibits oxidative stresses more potently than other CCBs under blockade of RAS and exerts renoprotection in type 2 diabetic nephropathy. Subjects were hypertensive type 2 diabetics with nephropathy, taking RAS inhibitors. The patients were randomly assigned to two groups, an AZ group (n=21, 16 mg/d) and a nifedipine-CR (NF) group (n=17, 40 mg/d). The plasma levels of monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6), high-sensitive C-reactive protein (hsCRP), adiponectin and tumor necrosis factor-alpha (TNF(alpha)), the urinary excretion of 8-epi-prostaglandin F(2alpha) (8-epi-PGF(2alpha)) and 8-hydroxydeoxyguanosine (8-OHdG), and the urinary albumin-to-creatinine ratios (ACR) were determined before and after 16-week treatment. Neither metabolic parameters nor blood pressure levels differed between the two groups not only at baseline but also after the treatment. However, significant decreases in MCP-1, IL-6, hsCRP, TNF(alpha), 8-epi-PGF(2alpha), 8-OHdG and ACR levels, and a signi...Continue Reading

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