Vol 71, No 6 (2020)
Original paper
Published online: 2020-09-18

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Is adiponectin in children with immunoglobulin A vasculitis a suitable biomarker of nephritis in the course of the disease?

Katarzyna Dyga1, Edyta Machura2, Elżbieta Świętochowska3, Katarzyna Ziora2, Maria Szczepańska2
Pubmed: 32944925
Endokrynol Pol 2020;71(6):512-517.

Abstract

Introduction: Immunoglobulin A vasculitis (IgAV) is the most common form of vasculitis in children. Nephritis in the course of this disease (IgAVN) is observed in 30–50% of patients and might lead to chronic kidney disease (CKD) and end-stage renal disease (ESRD). Finding a non-invasive biomarker to distinguish initially between patients with and without nephritis and to facilitate a therapeutic decision to reduce the risk of long-term renal impairment is currently the target of much research. The aim of this study was to evaluate the adiponectin concentration in children with IgAV and estimate whether it might be used as a marker of IgAVN.

Material and methods: The study involved 29 IgAV children and 34 healthy controls. Eleven (38%) patients had renal involvement (IgAV-N) and 18 (62%) did not exhibit nephritis (IgAV-noN). The serum adiponectin level was estimated in children in an acute phase of IgAV and after 2–6 months during a follow-up visit. The relationship between the concentration of adiponectin and anthropometric measurements, epidemiological data and laboratory parameters were evaluated.

Results: The concentration of adiponectin in serum was significantly higher in children with acute phase of IgAV as compared to the control group (p < 0.001), and in patients without renal involvement in comparison with IgAV-N children (p < 0.049). In analysis of correlation we found a negative relationship between adiponectin level and serum creatinine concentration (r = –0.437, p = 0.02). The logistic regression evaluation demonstrated that a low adiponectin level increased the risk of nephritis in the course of IgAV.

Conclusions: Our study revealed that the serum adiponectin level increased markedly in patients with IgAV. We also documented that higher risk of nephritis in the course of the disease was associated with lower concentration of this hormone.

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