Long-term outcome of pediatric renal transplantation: a single center study in Japan

Area of Science:

• Nephrology
• Pediatric Surgery
• Transplantation Immunology

Background:

• Long-term outcomes and risk factors for poor results in pediatric renal transplantation remain incompletely understood.
• Understanding these factors is critical for improving graft and patient survival rates.

Purpose of the Study:

• To identify risk factors associated with long-term poor outcomes in pediatric renal transplantation.
• To evaluate the impact of evolving immunosuppression protocols on transplant success.

Main Methods:

• Retrospective analysis of 111 renal transplants performed between 1973 and 2010 in 104 children.
• Long-term follow-up (mean 13.6 years) to assess patient and graft survival.
• Analysis of causes of graft loss and factors influencing patient survival.

Main Results:

• Patient survival rates at 30 years were 79.3% (living donor) and graft survival was 33.3%.
• Common causes of graft loss included chronic allograft injury (CAI), acute rejection (AR), and death with functioning graft.
• While improved immunosuppression reduced AR and acute tubular necrosis (ATN), CAI emerged as the primary risk factor for graft loss, correlated with AR, CMV infection, and hypertension.

Conclusions:

• Chronic allograft injury (CAI) is the predominant risk factor for graft loss in pediatric kidney transplantation.
• Strategies to prevent CAI, including managing hypertension and infection, are essential for enhancing long-term transplant outcomes.
• Further research into preventing malignancy and cardiovascular events is also recommended.