Renal function after pediatric intestinal transplant

Area of Science:

• Pediatric Gastroenterology
• Nephrology
• Transplant Surgery

Background:

• Intestinal transplantation is a complex procedure for end-stage intestinal failure.
• Tacrolimus is a crucial immunosuppressant but can be nephrotoxic.
• Long-term renal function after pediatric intestinal transplantation requires careful monitoring.

Purpose of the Study:

• To evaluate long-term kidney function in pediatric patients following intestinal transplantation.
• To identify predictors of renal impairment, specifically focusing on tacrolimus levels.

Main Methods:

• Analysis of data from 44 pediatric patients surviving >2 years post-intestinal transplant (1994-2002).
• Kidney function assessed via serum creatinine and calculated glomerular filtration rate (GFR) using the Schwartz formula.
• Tacrolimus levels monitored and correlated with renal function outcomes at 18-24 months.

Main Results:

• Mean GFR decreased from 138 mL/min/1.73 m(2) pre-transplant to 102 mL/min/1.73 m(2) at 18-24 months post-transplant (81% of pre-transplant value, P < .0001).
• Tacrolimus levels >13.5 ng/mL during the first 12 months significantly predicted impaired renal function (GFR < 90 mL/min/1.73 m(2)) at 2 years (P = .001).
• Only patient age correlated with renal function; transplant type and rejection episodes did not.

Conclusions:

• Pediatric intestinal transplantation leads to a significant and sustained decline in renal function by two years post-transplant.
• Early post-transplant tacrolimus levels are a critical predictor of subsequent nephrotoxicity.
• Close monitoring and potential optimization of tacrolimus dosing are essential to preserve kidney function in these patients.