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  • Title: Effect of diet, enalapril, or losartan in post-diarrheal hemolytic uremic syndrome nephropathy.
    Author: Caletti MG, Missoni M, Vezzani C, Grignoli M, Piantanida JJ, Repetto HA, Exeni R, Rasse SM.
    Journal: Pediatr Nephrol; 2011 Aug; 26(8):1247-54. PubMed ID: 21533629.
    Abstract:
    Proteinuria is the main indicator of renal disease progression in many chronic conditions. There is currently little information available on the efficacy, safety, and individual tolerance of patients with post-diarrheal hemolytic uremic syndrome (D+ HUS) nephropathy to therapies involving diet, enalapril, or losartan. A multicenter, double-blind, randomized controlled trail was conducted to evaluate the effect of a normosodic-normoproteic diet (Phase I) and the effect of normosodic-normoproteic diet plus enalapril (0.18-0.27 mg/kg/day) or losartan (0.89-1.34 mg/kg/day) (Phase II) on children with D+ HUS, normal renal function, and persistent, mild (5.1-49.9 mg/kg/day) proteinuria. Dietary intervention reduced the mean protein intake from 3.4 to 2.2 mg/kg/day. Of 137 children, proteinuria normalized in 91 (66.4 %) within 23-45 days; the remaining 46 patients were randomized to diet plus placebo (group 1, n = 16), plus losartan (group 2, n = 16), or enalapril (group 3, n = 14). In groups 1, 2, and 3, proteinuria was reduced by 30.0, 82.0, and 66.3%, respectively, and normalized in six (37.5%), three (81.3%), and 11 (78.6%) patients, respectively (χ(2)= 8.9, p = 0.015). These results suggest that: (1) a normosodic-normoproteic diet can normalize proteinuria in the majority of children with D+ HUS with mild sequelae, (2) the addition of enalapril or losartan to such dietary restrictions of protein further reduces proteinuria, and (3) these therapeutic interventions are safe and well tolerated. Whether these short-term effects can be extended to the long-term remains to be demonstrated.
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