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Clinical Trial
Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't
Influence of renin-angiotensin-aldosterone system-blocking drugs on peritoneal membrane in peritoneal dialysis patients.
Therapeutic Apheresis and Dialysis 2013 August
Therapy with renin-angiotensin-aldosterone system (RAAS)-blocking drugs prevents the development of fibrosis and angiogenesis in animal models and humans. In our study we have evaluated the systemic effect of RAAS blockade and the effect on peritoneal growth factors, cytokine production and membrane transport characteristics in patients on peritoneal dialysis. Thirty-seven peritoneal dialysis (PD) patients were enrolled in our cross-sectional study. Aldosterone and angiotensin II concentrations were measured in serum to determine the RAAS activity. The inflammatory and profibrotic activity was evaluated by measuring the concentration of C-reactive protein (CRP), serum albumin, and peritoneal concentration of interleukin-6 (IL-6), vascular endothelial growth factor (VEGF), plasminogen activator inhibitor-1 (PAI-1), transforming growth factor-β (TGF-β) and cancer antigen-125 (CA-125). The transport characteristics of the peritoneal membrane were analyzed with a peritoneal equilibration test (PET). Results were compared between the group with RAAS-blocking drugs (RAAS group) and the group without them (non-RAAS group). Mean serum aldosterone concentration was significantly lower in patients treated with ARB-blocking drugs (P = 0.001) and serum angiotensin II concentration was lower in patients treated with ACE inhibitors (P = 0.009). RAAS blockade resulted in lower peritoneal PAI-1 levels (748.1 to 1222.7 ng/L; P = 0.07) without any influence on CRP, peritoneal concentrations of IL-6, VEGF, TGF-β and CA-125, or alteration in peritoneal membrane characteristics tested by PET. RAAS-blocking drugs could be effective in preventing peritoneal fibrosis due to possible reduction of peritoneal PAI-1 concentrations that have already been etiologically linked with fibrin deposition in the pathogenesis of encapsulating peritoneal sclerosis.
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