Abstract
Background
IgA nephropathy (IgAN) is often chronically progressive and commonly accompanied by dyslipidemia. However, the intrinsic relationship between dyslipidemia and IgAN remains to be elucidated. This study aimed to investigate the impact of different types of dyslipidemia on clinical and pathological characteristics in children with IgAN.
Methods
In our retrospective cohort study from January 2006 to January 2021, 276 children with IgAN were ultimately included in the baseline analysis, and 169 were included in the follow-up analysis. The clinical and pathological features of different types of dyslipidemia and their effect on kidney prognosis were analyzed.
Results
Children in the dyslipidemia group had more severe clinical characteristics (higher blood urea nitrogen, serum uric acid, and 24-h proteinuria; higher proportion of hypertension; and lower serum albumin and estimated glomerular filtration rate) and pathological changes (higher proportion of Lee grades IV–V and E1, S1, and C2 in MEST-C). Furthermore, the clinical and pathological characteristics were worse in the mixed hyperlipidemia group. Multivariate logistic analysis showed that hypertension, steroid treatment, lower serum albumin, severe proteinuria, and segmental glomerulosclerosis were independent risk factors for dyslipidemia in children with IgAN. The Kaplan–Meier analysis revealed that the probability of kidney survival in children with dyslipidemia was lower than that in those without dyslipidemia, with a median follow-up of 5.9 years.
Conclusions
Children with IgAN and dyslipidemia, especially mixed hyperlipidemia, are prone to more severe clinical and pathological changes. Our study provides further insight into dyslipidemia as a potential risk factor in children with IgAN.
Graphical abstract
A higher resolution version of the Graphical abstract is available as Supplementary information.
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Data availability
The data are available from the corresponding author upon reasonable request.
Code availability
Not applicable.
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Acknowledgements
The authors thank all physicians who processed medical work and all children and their families who participated in this study.
Funding
This study received financial support from the National Natural Science Foundation of China (NSFC No. 81970611), and Guangdong Basic and Applied Basic Research Foundation (No. 2019A1515011546 and No. 2019A1515010694), and College Student Innovation and Entrepreneurship Program of Sun Yat-sen University (grant number: 202210651).
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Yuanyuan Xu and Xiaoyun Jiang designed the study. Hongjie Zhuang and Shuhan Zeng collected the clinical data from the patients. Hongjie Zhuang, Zhilang Lin, and Mengjie Jiang performed the data analyses and wrote the manuscript. Yuanyuan Xu, Lizhi Chen, and Xiaoyun Jiang were the treating physicians of the patients and conducted a discussion. All the authors revised and approved the final version.
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This study was in accordance with the Declaration of Helsinki and approved by the ethics committee of the First Affiliated Hospital, Sun Yat-sen University (No. (2016) 040).
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Hongjie Zhuang and Zhilang Lin contributed equally to this work.
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Zhuang, H., Lin, Z., Zeng, S. et al. Dyslipidemia may be a risk factor for progression in children with IgA nephropathy. Pediatr Nephrol 37, 3147–3156 (2022). https://doi.org/10.1007/s00467-022-05480-x
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DOI: https://doi.org/10.1007/s00467-022-05480-x