Abstract
Objective
IgA nephropathy (IgAN) and IgA vasculitis with nephritis (IgAV-N) are related diseases. Galactose-deficient IgA1 (Gd-IgA1) plays an important role in the pathology of IgAV-N and IgAN, so we aim to compare the serum levels of Gd-IgA1 in Chinese pediatric patients with IgAN, IgAV-N, and IgAV.
Methods
We retrospectively enrolled 52 patients with IgAN, 57 patients with IgAV-N, 26 patients with IgAV, and 40 healthy children. The serum levels of Gd-IgA1 were measured at the time of biopsy using a lectin-based ELISA method.
Results
Gd-IgA1 levels in IgAV-N patients and IgAN patients were higher than in healthy controls (303.94 ± 39.37 U/ml, 314.91 ± 47.79 U/ml vs. 273.57 ± 48.29 U/ml, P < 0.001), and Gd-IgA1 levels in IgAV-N patients were higher than in IgAV patients (303.94 ± 39/ml vs. 286. 21 ± 38.81 U/ml, P = 0.059), but the latter result is not statistically significant. The Gd-IgA1 levels in IgAV patients were comparable with those in healthy controls (286.21 ± 38.81 U/ml vs. 273.57 ± 48.29 U/ml, P = 0.267). Among the four groups, we did not observe significant correlations of Gd-IgA1 levels with eGFR, proteinuria, or the MEST-C score.
Conclusion
Serum Gd-IgA1 maybe involved in the pathogenesis of the IgAV-N and IgAN. However, we found no statistically significant correlation between Gd-IgA1 levels and clinical and pathological features.
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Acknowledgements
We thank all our colleagues at the Department of Nephrology, Beijing Children’s Hospital, China for providing the pediatric patient case information, and Dr. Lin Hua of the School of Biomedical Engineering, Capital Medical University, China for providing help with the statistical analysis.
Funding
This work was supported by the Capital Health Research and Development of Special Grant (No. 2016–2-2094), the Research on the Application of Capital Clinical Characteristics Program of Beijing Municipal Science and Technology Commission (No. Z161100000516106), and the Project of Beijing Science and Technology Commission (No. D181100000118006).
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This study was approved by the Ethics Committee of the Beijing Children’s Hospital (Reference Number: 2018183). For each patient, informed consent was obtained from a parent or legally authorized representative.
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Tang, M., Zhang, X., Li, X. et al. Serum levels of galactose-deficient IgA1 in Chinese children with IgA nephropathy, IgA vasculitis with nephritis, and IgA vasculitis. Clin Exp Nephrol 25, 37–43 (2021). https://doi.org/10.1007/s10157-020-01968-8
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DOI: https://doi.org/10.1007/s10157-020-01968-8