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Nefrología (Madrid)

versión On-line ISSN 1989-2284versión impresa ISSN 0211-6995

Resumen

LORENZO, Alberto de et al. Oral paricalcitol as antiproteinuric agent in chronic kidney disease. Nefrología (Madr.) [online]. 2013, vol.33, n.5, pp.709-715. ISSN 1989-2284.  https://dx.doi.org/10.3265/Nefrologia.pre2013.Jun.11928.

Background: Vitamin D has an important regulatory effect on the renin-angiotensin-aldosterone system, playing a central role in the regulation of proteinuria. We therefore studied the antiproteinuric effect of paricalcitol. Methods: 36 patients with an estimated GFR of 30-90mL/min/1.73m2 and proteinuria >400mg/d with a stable dose of ACE inhibitor or ARB for at least 3 months were recruited. Patients received oral paricalcitol 1µg/day for 12 months. Primary endpoint was decrease in proteinuria from baseline. Secondary endpoints were changes in creatinine, eGFR, serum levels of calcium, phosphorus, iPTH, 25(OH)vitD, C-Reactive Protein and blood presure. Results: Mean proteinuria was 2806mg/d and fell to 2199mg/d at month 6 (p<.0001) and 1931.5mg/d at month 12 (p<.0001). Patients with >3000mg/d baseline proteinuria (n=12) saw smaller relative reductions in proteinuria (5956.9±2492.6mg/d to 4220.4±2613mg/d at 12 months) than patients with <3000mg/d baseline proteinuria (1371±627.5 mg/d to 821.3±491.5mg/d at 12 months). There were no changes in BP, eGFR and CRP. We observed significant changes in serum levels of calcium, phosphorus, iPTH, 25(OH) vitamin D. Conclusion: Our study shows an important reduction in proteinuria with a low dose of oral paricalcitol in CKD, that is particularly robust with baseline proteinuria between 1-3g/d.

Palabras clave : Chronic kidney disease; Paricalcitol; Proteinuria; Renin-angiotensin system; Vitamin D.

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