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Serum GDIgA1 levels in children with IgA nephropathy and Henoch-Schönlein nephritis
Małgorzata Mizerska-Wasiak1, Łukasz Gajewski2, Karolina Cichoń-Kawa1
1Department of Paediatrics and Nephrology, Medical University of Warsaw, Warsaw, Poland.
Insights
Elevated serum galactose-deficient IgA1 (GDIgA1) levels indicate a potential prognostic marker in children with IgA nephropathy (IgAN) and Henoch-Schönlein nephritis (HSN). Further research is needed to confirm its clinical utility.
Area of Science:
- Pediatric Nephrology
- Immunology
- Renal Pathology
Background:
- Galactose-deficient IgA1 (GDIgA1) is implicated in the pathogenesis of IgA nephropathy (IgAN) and Henoch-Schönlein nephritis (HSN).
- Understanding biomarkers for these conditions is crucial for effective patient management.
Purpose of the Study:
- To evaluate the prognostic relevance of serum GDIgA1 levels in pediatric patients diagnosed with IgAN and HSN.
- To correlate GDIgA1 levels with clinical and histological findings.
Main Methods:
- A cohort of 41 children (15 IgAN, 26 HSN) and 22 controls were studied.
- Clinical parameters (proteinuria, creatinine, GFR) and kidney biopsy (Oxford Classification) were assessed.
- Serum GDIgA1 concentrations were measured at the end of follow-up.
Main Results:
- Serum GDIgA1 levels were significantly higher in patients with IgAN and HSN compared to controls.
- Positive correlations were found between GDIgA1 and serum IgA (r=0.53), and GDIgA1 and serum creatinine (r=0.5).
- A negative correlation was observed between GDIgA1 and GFR (r=-0.37).
Conclusions:
- Serum GDIgA1 may serve as a prognostic marker in pediatric IgAN and HSN.
- Larger cohort studies are necessary to fully establish the clinical significance of GDIgA1.
Introduction:
GDIgA1 (galactose deficient IgA1) plays a significant role in the pathogenesis of IgA nephropathy (IgAN) and Henoch-Schönlein nephritis (HSN).
Aim Of The Study:
The aim of this study was to assess the relevance of serum GDIgA1 level as a prognostic marker in children with IgAN and HSN.
Material And Methods:
41 children were included to the study group (15 IgAN, 26 HSN) and 22 to the control group. The following parameters were evaluated at baseline and endpoint: proteinuria, erythrocyturia, serum creatinine, serum IgA, GFR. A kidney biopsy was performed in all patients and evaluated according to the Oxford Classification (1 - present, 0 - absent: M - mesangial hypercellularity; E- endocapillary hypercellularity; S - segmental sclerosis/adhesion; T - tubular atrophy/interstitial fibrosis), and was calculated as the total score (sum of M, E, S, T). At the end of follow-up, the serum GDIgA1 concentration was measured.
Results:
The serum GDIgA1 concentration in patients with IgAN and HSN was significantly higher than in the control group. No significant differences in mean proteinuria, erythrocyturia, GFR, MEST score, or GDIgA1 in serum, as well as the duration of follow-up between IgAN and HSN were observed. Baseline serum IgA concentration and time to kidney biopsy were significantly higher in children with IgAN than in children with HSN. We observed a positive correlation between GDIgA1 and IgA levels (r = 0.53), and GDIgA1 and serum creatinine levels (r = 0.5), as well as negative correlation between GDIgA1 and GFR (r = -0.37).
Conclusions:
Serum GDIgA1 level may have a prognostic value in children with IgAN and HSN; however, to fully elucidate its clinical potential further studies performed in larger patient cohorts are required.
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