Abstract
Background
The objective of the study was to explore the potential biomarkers and risk factors in children with immunoglobulin A nephropathy (IgAN).
Methods
Untargeted metabolomics analysis was performed on children with IgAN before and after treatment. Subsequently, a retrospective study involving the past 15 years and a follow-up study were performed to verify the role of hyperuricemia in IgAN children.
Results
Serum metabolomics analyses showed that levels of serum xanthosine were closely related to the outcome of IgAN, and KEGG analyses showed that differential metabolites were significantly enriched in purine metabolism. Furthermore, retrospectively analyses of 252 children with IgAN showed that hyperuricemia was associated with poorer renal outcome. Logistic regression analysis showed that BMI, serum creatinine, eGFR, Lee’s grade III, and crescents were risk factors of hyperuricemia in children with IgAN. Kaplan–Meier analysis revealed that kidney progression-free survival in IgAN children with hyperuricemia was lower than that without hyperuricemia, especially in females.
Conclusions
We first performed a dynamic metabolomics study to reveal that hyperuricemia is closely related to the progression of IgAN in children. Then retrospective and follow-up studies confirmed that hyperuricemia is an important risk factor for poor renal outcomes. We need to pay more attention to the hyperuricemia in children with IgAN.
Impact
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We first performed a dynamic metabolomics study to reveal that hyperuricemia was closely related to the progression of IgAN in children.
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Retrospective analyses in past 15 years confirmed that IgAN children with hyperuricemia had poorer renal function and worse renal pathology.
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The BMI, Scr, eGFR, Lee’s grade III, and crescents were risk factors of hyperuricemia in children with IgAN.
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The long-term follow-up study showed that hyperuricemia was an important risk factor for poor renal outcome in children with IgAN.
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We need to pay more attention to hyperuricemia in children with IgAN, especially in females.
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Data availability
The datasets used and analyzed in this study are available from the corresponding author upon reasonable request.
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Funding
This work was supported by the Sun Yat-sen University Basic Scientific Research Young Teacher Training Project (grant number: 19ykpy65); Guangdong Basic and Applied Basic Research Foundation (grant number: 2019A1515010694); Science and Technology Planning Project of Guangzhou, China (grant number: 202201011400); College Student Innovation and Entrepreneurship Program of Sun Yat-sen University (grant number: 202210651).
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Y.X., Y.M., X.J., and W.L. contributed to the study design. Y.X., H.Z., and H.L. contributed to the serum sample and data collections. Y.X., X.Z., and H.Z. contributed to the data analysis and writing of the manuscript. Y.M., X.J., and W.L. contributed to the project supervision and review and editing of the manuscript, and all authors read and approved the final manuscript.
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This study was approved by the ethics committee of the First Affiliated Hospital of Sun Yat-sen University (No. [2016] 040 and [2020] 499). All the children and their guardians were informed and signed consent forms before the study.
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Xu, Y., Zheng, X., Zhuang, H. et al. Hyperuricemia is associated with the progression of IgA nephropathy in children. Pediatr Res 94, 1057–1066 (2023). https://doi.org/10.1038/s41390-023-02538-w
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DOI: https://doi.org/10.1038/s41390-023-02538-w