Abstract
Background
Catch-up growth after pediatric kidney transplantation (kTx) is usually insufficient to reach normal adult height. We aimed to analyze the effect of pre-transplant recombinant human growth hormone (rhGH) and corticosteroid withdrawal on linear growth in the first year after kidney transplantation and identify factors associated with final height (FH).
Methods
Patients who underwent kTx between 1996 and 2018 at below 18 years old in five Belgian and Dutch centers were included. We analyzed the differences between height Z-scores at kTx and 1 year post-transplant (Δ height Z-score) in children with and without corticosteroids at 1 year (CS + /CS −) and with and without rhGH treatment before kTx (rhGH + /rhGH −). Univariable and multivariable linear regression analysis was applied to identify factors associated with height Z-score at 1 year post-kTx, Δ height Z-score, and FH Z-score.
Results
A total of 177 patients were included, with median age 9.3 years at kTx. Median height Z-scores pre-kTx and 1 year later in the CS − /rhGH − , CS + /rhGH − , CS − /rhGH + , and CS + /rhGH + groups were − 1.42/ − 0.80, − 0.90/ − 0.62, − 1.35/ − 1.20, and − 1.30/ − 1.60 (p = 0.001). CS use 1 year post-kTx was the only factor associated with Δ height (p = 0.003) on multivariable analysis. CS use at 1 year was the only variable associated with FH (p = 0.014) in children with pre-transplant height Z-score below − 1 (n = 52).
Conclusions
Increase in height Z-score in the first year post-kTx was highest in the CS − /rhGH − group and lowest in the CS + /rhGH + group. The use of corticosteroids at 1 year post-kTx is associated with catch-up growth and in children with pre-transplant height Z-score below − 1 also with final height.
Graphical abstract
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- CKD:
-
Chronic kidney disease
- kTx:
-
Kidney transplantation
- NAPRTCS:
-
North American Pediatric Renal Trials and Collaborative Studies
- SD:
-
Standard deviation
- GH:
-
Growth hormone
- IGF:
-
Insulin-like growth factor
- rhGH:
-
Recombinant human growth hormone
- PTLD:
-
Post-transplant lymphoproliferative disease
- PTLD:
-
General Data Protection Regulation
- BMI:
-
Body mass index
- CKiD formula:
-
Chronic Kidney Disease in Children
- eGFR:
-
Estimated glomerular filtration rate
- CDG:
-
Congenital defect of glycosylation
- CAKUT:
-
Congenital anomaly of the kidney or urinary tract
- FSGS:
-
Focal segmental glomerulosclerosis
- IQR:
-
Interquartile range
- HUS:
-
Hemolytic uremic syndrome
- CS:
-
Corticosteroids
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This study was supported by a research grant from Novo Nordisk.
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Tourlamain, G., Keijzer-Veen, M., Bouts, A. et al. Early corticosteroid withdrawal is associated with improved adult height in pediatric kidney transplant recipients. Pediatr Nephrol 38, 279–289 (2023). https://doi.org/10.1007/s00467-022-05581-7
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DOI: https://doi.org/10.1007/s00467-022-05581-7