Decline in renal function following thoracic organ transplantation in children

Area of Science:

• Pediatric Nephrology
• Transplant Medicine
• Cardiology

Background:

• End-stage cardiopulmonary disease necessitates life-saving thoracic organ transplantation.
• Chronic renal failure is a potential complication post-transplant.
• The long-term effects of pediatric thoracic organ transplants on renal function are not well understood.

Purpose of the Study:

• To evaluate the impact of thoracic organ transplantation on renal function in pediatric patients.
• To identify factors associated with changes in renal function post-transplant.

Main Methods:

• Retrospective cohort study of 46 children undergoing heart, lung, or heart-lung transplantation.
• Glomerular filtration rate (GFR) estimated using the Schwartz formula and expressed as % of normal for age (GFR%).
• Longitudinal mixed-effects linear regression models analyzed changes in GFR% over time.

Main Results:

• GFR% significantly decreased post-thoracic organ transplantation (p <0.001).
• Younger age at transplant correlated with a greater decline in GFR% (p <0.01).
• Renal insufficiency (GFR% <75) increased from 22% at transplant to 85% by 5 years; higher tacrolimus levels were associated with lower GFR%.

Conclusions:

• Thoracic organ transplantation leads to significant renal function decline in children.
• Age at transplant and tacrolimus exposure are key factors influencing post-transplant renal outcomes.
• Close monitoring of renal function is crucial in pediatric transplant recipients.