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Stable long-term renal function after pediatric liver transplantation
Gustaf Herlenius1, Sverker Hansson, Marie Krantz
1Transplant Institute, Sahlgrenska University Hospital, Göteborg, Sweden. gustaf.herlenius@gmail.com
Insights
Pediatric liver transplant recipients experienced a significant initial drop in kidney function, but renal function stabilized long-term. Most children did not develop chronic kidney disease (CKD) stage III by year five, suggesting potential renal recovery post-transplant.
Area of Science:
- Pediatric Nephrology
- Hepatology
- Transplantation Medicine
Background:
- Calcineurin inhibitors used post-liver transplant (LT) are associated with increased risk of chronic kidney disease (CKD) in children.
- Understanding long-term renal function after pediatric LT is crucial for patient management and prognosis.
Purpose of the Study:
- To assess renal function (glomerular filtration rate - GFRm) before and annually after pediatric LT.
- To determine the prevalence of CKD stage III (GFR 30-60 mL/min/1.73 m²) post-LT.
- To investigate the impact of patient age at LT and underlying liver disease on long-term renal function.
Main Methods:
- Prospective study of 36 children undergoing LT, with median follow-up of 6.5 years.
- GFRm was measured before LT and annually thereafter.
- Analysis included patient age at LT, underlying liver disease etiology, and CKD prevalence.
Main Results:
- A significant 23% decrease in GFRm occurred within the first six months post-LT, followed by stabilization.
- CKD stage III prevalence was 17% at six months and 18% at five years, but 0% at ten years.
- Children transplanted younger than two years showed a smaller initial GFRm decrease (13%) compared to older children (31%); however, renal function stabilized in both groups.
Conclusions:
- Pediatric liver transplant recipients experience an initial decline in renal function, but it tends to stabilize over time.
- The prevalence of CKD stage III is notable in the early post-transplant period but may resolve with longer follow-up.
- Age at transplantation and underlying liver disease (especially malignancy) can influence the initial renal function decline, but long-term recovery is possible.
Abstract:
Long-term exposure to calcineurin inhibitors increases the risk of CKD in children after LT. The aims of this study were to study renal function by measuring GFRm before and yearly after LT, to describe the prevalence of CKD (stage III: GFR 30-60 mL/min/1.73 m(2)) and to investigate if age and underlying liver disease had an impact on long-term renal function. Thirty-six patients with a median age of 2.9 years (0.1-16 yr) were studied. Median follow-up was 6.5 (2-14 yr). GFRm decreased significantly during the first six months post-transplantation with 23% (p < 0.001). Thereafter renal function stabilized. At six months, 17% (n = 5) of the children presented CKD stage III and at five yr the prevalence of CKD III was 18% in 29 children. However, in 13 children with a 10-year follow-up it was 0%. None of the children required renal replacement therapy after LT. When analyzing renal function of those children younger than two yr (n = 14) and older than two yr (n = 17) at the time of transplantation, we found that in both cohorts the filtration rate remained remarkably stable during the five-yr observational period. However, there was a statistically significant (p < 0.05) difference in the percentual decrease in GFRm between the groups during the first six months after LT 13% and 31%, respectively. Baseline GFRm according to diagnosis did not differ between the groups. During the first six months after LT, patients transplanted for hepatic malignancy (n = 6) and those with metabolic liver disease (n = 4) had a percentage loss of GFRm of 32% and 35%, respectively. The corresponding loss of GFRm in patients with other diseases was 10-19%. Six months post-transplantation mean GFRm in the group with malignant liver disease was 65 +/- 15 mL/min/1.73 m(2) and in the group with other diseases (n = 24) 82 +/- 17 mL/min/1.73 m(2) (p < 0.05). At one, three and five yr post-transplantation there was no longer a statistically significant difference between these cohorts. Our findings suggest that there can be a long-term recovery of renal function after LT in children.
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