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01.07.2015 | Original Article

Relationship between serum IgA/C3 ratio and severity of histological lesions using the Oxford classification in children with IgA nephropathy

verfasst von: Małgorzata Mizerska-Wasiak, Jadwiga Małdyk, Agnieszka Rybi-Szumińska, Anna Wasilewska, Monika Miklaszewska, Jacek Pietrzyk, Agnieszka Firszt-Adamczyk, Roman Stankiewicz, Beata Bieniaś, Małgorzata Zajączkowska, Katarzyna Gadomska-Prokop, Ryszard Grenda, Agnieszka Pukajło-Marczyk, Danuta Zwolińska, Maria Szczepańska, Agnieszka Turczyn, Maria Roszkowska-Blaim

Erschienen in: Pediatric Nephrology | Ausgabe 7/2015

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Abstract

Background

The aim of this study was to evaluate the usefulness of serum immunoglobulin A/complement factor 3 (IgA/C3) ratio for predicting histological severity of kidney lesions in children with IgA nephropathy (IgAN) based on World Health Organization (WHO) and the Oxford classification (OC).

Methods

We studied 89 children with IgAN with a mean age of 11.38 ± 4.1 years (range 2–18 years). Based on available medical records, we retrospectively evaluated clinical data, IgA/C3 ratio, and kidney biopsy findings using the five-grade WHO classification and the OC The mesangial hypercellularity (M), endocapillary hypercellularity (E), segmental sclerosis (S), tubular atrophy/interstitial fibrosis (T) (MEST) score (absent = 0, present = 1) calculated as the sum of M+E+S+T ranging from 0 to 4.

Results

Mean IgA/C3 ratio values were significantly higher (P < 0.05) in patients with M1, S1, and T1 compared with M0, S0, and T0, respectively (P < 0.05); there were no differences in the WHO classification. We found a significant positive correlation between the IgA/C3 ratio and proteinuria (r = 0.24) and determined optimal cutoff values of the IgA/C3 ratio, with a corresponding confidence interval for specific MEST scores.

Conclusions

The IgA/C3 ratio in children with IgAN may be a useful marker of the severity of lesions found in kidney biopsy as evaluated using the OC.

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Titel: Relationship between serum IgA/C3 ratio and severity of histological lesions using the Oxford classification in children with IgA nephropathy
verfasst von: Małgorzata Mizerska-Wasiak
Jadwiga Małdyk
Agnieszka Rybi-Szumińska
Anna Wasilewska
Monika Miklaszewska
Jacek Pietrzyk
Agnieszka Firszt-Adamczyk
Roman Stankiewicz
Beata Bieniaś
Małgorzata Zajączkowska
Katarzyna Gadomska-Prokop
Ryszard Grenda
Agnieszka Pukajło-Marczyk
Danuta Zwolińska
Maria Szczepańska
Agnieszka Turczyn
Maria Roszkowska-Blaim
Publikationsdatum: 01.07.2015
Verlag: Springer Berlin Heidelberg
Erschienen in: Pediatric Nephrology / Ausgabe 7/2015
Print ISSN: 0931-041X
Elektronische ISSN: 1432-198X
DOI: https://doi.org/10.1007/s00467-014-3024-z

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Relationship between serum IgA/C3 ratio and severity of histological lesions using the Oxford classification in children with IgA nephropathy