Abstract
Background
Early detection of hypertension in children with autosomal polycystic kidney disease (ADPKD) may be beneficial, but screening children at risk of ADPKD remains controversial. We investigated determinants of hypertension in children with ADPKD to help identify a subgroup of children at risk of ADPKD for whom screening for the disease and/or its complications would be more relevant.
Methods
In a retrospective study including consecutive children with ADPKD aged 5–18 years and followed at Saint-Luc Hospital Brussels between 2006 and 2020, we investigated the potential association between genotype, clinical characteristics and parental phenotype, and presence of hypertension. Hypertension was defined as blood pressure > P95 during 24-h ambulatory monitoring or anti-hypertensive therapy use. Parental phenotype was considered severe based on age at kidney failure, Mayo Clinic Imaging Classification and rate of eGFR decline.
Results
The study enrolled 55 children with ADPKD (mean age 9.9 ± 2.2 years, 45% male), including 44 with a PKD1 mutation and 5 with no mutation identified. Nine (16%) children had hypertension. Hypertension in children was associated with parental phenotype severity (8/27 (30%) children with severe parental phenotype vs. 1/23 (4%) children with non-severe parental phenotype (p = 0.03)) and height-adjusted bilateral nephromegaly (6/9 (67%) children with bilateral nephromegaly vs. 3/44 (7%) children without bilateral nephromegaly (p < 0.001)).
Conclusions
Severe parental phenotype is associated with higher prevalence of hypertension in children with ADPKD. Hence, children of parents with severe ADPKD phenotype may be those who will most benefit from screening of the disease and/or yearly BP measures.
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Acknowledgements
We wish to thank O. Devuyst and Y. Pirson for their constructive advice and review of the manuscript, as well as P. Harris and SR Senum for their help in the categorization of the PKD1 variants.
Six of the authors of this publication are members of the European Reference Network for Rare Kidney Diseases (ERKNet).
Funding
This study was supported by a private grant (“Prix Marlène et Philippe Cloës”), and an unrestricted educational grant from Otsuka Pharmaceuticals (Nathalie Demoulin).
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All the authors contributed to the design of the study and review of the manuscript. ND, EVR, and NG wrote the manuscript. JM performed the statistical analysis.
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Demoulin, N., Van Regemorter, E., Dahan, K. et al. Severe parental phenotype associates with hypertension in children with ADPKD. Pediatr Nephrol 38, 2733–2740 (2023). https://doi.org/10.1007/s00467-022-05870-1
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DOI: https://doi.org/10.1007/s00467-022-05870-1