Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
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ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
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Advances in Clinical and Experimental Medicine

2020, vol. 29, nr 5, May, p. 603–609

doi: 10.17219/acem/121519

Publication type: original article

Language: English

License: Creative Commons Attribution 3.0 Unported (CC BY 3.0)

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Annexin V in children with idiopathic nephrotic syndrome treated with cyclosporine A

Anna Jakubowska1,A,B,C,D, Katarzyna Kiliś-Pstrusińska1,A,C,D,E,F

1 Department and Clinic of Pediatric Nephrology, Wroclaw Medical University, Poland

Abstract

Background. Treatment with cyclosporine A (CsA), a calcineurin inhibitor, is effective in children with difficult idiopathic nephrotic syndrome (INS). Prolonged CsA treatment can result in several adverse effects, the most significant being nephrotoxicity (CsAN). The plasma and urine levels of the proteins annexin V (AnV) and uromodulin (UM) were investigated in order to assess their usefulness as indicators of early-stage CsAN. Uromodulin is considered a distal tubular damage marker. Annnexin V is present in the distal tubules.
Objectives. To measure AnV in children with INS receiving CsA treatment and to assess the usefulness of this biomarker for monitoring CsAN and as an indicator of changes in the distal tubules of the nephron.
Material and Methods. The prospective study included 30 patients with INS and 22 controls. Plasma and urinary AnV levels were measured 3 times: before CsA treatment, and after 6 and 12 months of therapy. The AnV levels were compared to those of UM.
Results. The urinary AnV and UM levels were significantly higher in the INS patients before CsA therapy in comparison to the reference group. A progressive increase of urinary AnV was observed after 6 and 12 months of therapy. Urinary UM only increased after 6 months. No significant correlations were found between plasma and urinary concentrations of the proteins studied.
Conclusion. The increased urinary excretion of AnV in children with INS receiving CsA treatment may suggest its usefulness as an early marker of subclinical CsAN. Annexin V seems to be a more sensitive indicator of tubular damage in the course of CsA therapy than UM, though large, multicenter studies are needed.

Key words

children, idiopathic nephrotic syndrome, cyclosporine nephrotoxicity, urine biomarkers

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