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Does human lymphocyte antigen matching improve the outcome in pediatric renal transplants?
1Division of Pediatric Nephrology, Children's Hospital Medical Center, Cincinnati, OH 45229-2899.
Insights
Pediatric kidney transplant recipients benefit from better human lymphocyte antigen (HLA) matching, particularly at the DR locus. Improved antigen matching correlates with superior long-term graft survival and quality of life.
Area of Science:
- Nephrology
- Immunology
- Transplantation
Background:
- Adult studies indicate high renal graft survival with a six-antigen match for human lymphocyte antigen (HLA)-A, B, and DR loci.
- Pediatric renal transplantation outcomes require further investigation regarding antigen matching.
- Cadaver donor kidney allocation is a critical consideration for maximizing graft survival.
Purpose of the Study:
- To evaluate the impact of human lymphocyte antigen (HLA) matching on pediatric cadaver donor renal allograft outcomes.
- To determine the specific benefit of DR locus matching in pediatric kidney transplantation.
- To inform organ assignment strategies for optimal resource utilization and patient quality of life.
Main Methods:
- Analysis of 4-year data from the North American Pediatric Renal Transplant Cooperative Study Registry.
- Comparison of graft survival rates based on the degree of HLA antigen matching (0, 1, or more antigens).
- Statistical evaluation of the effect of DR matching on cadaver graft outcomes.
Main Results:
- No antigen matching resulted in significantly worse 1-year graft survival (72%) compared to any antigen matching (81%).
- DR matching demonstrated a statistically beneficial effect on cadaver graft outcomes in pediatric recipients.
- A trend towards improved graft survival was observed with increasing HLA antigen matching.
Conclusions:
- Enhanced human lymphocyte antigen (HLA) matching, especially at the DR locus, improves pediatric renal allograft survival.
- Cadaver donor organ assignment should integrate center- and patient-driven recipient selection criteria for optimal outcomes.
- Improved antigen matching contributes to better long-term graft function and enhanced recipient quality of life.
Abstract:
Adult studies have shown a high renal graft survival if the donor and recipient match for each antigen of the human lymphocyte antigen (HLA)-A, B and DR loci (six-antigen match). The 4 yr of data from the North American Pediatric Renal Transplant Cooperative Study Registry show a statistically beneficial effect of DR matching for cadaver graft outcome. No antigen matching clearly has a worse outcome, 72% at 1 yr versus those with one or more antigen matching at each loci with a 1-yr graft survival of 81% and 2-yr graft survival of 69%. The long-term improved outcome from better antigen matching suggests that cadaver donor allograft organ assignment should address both the need of the center-driven and patient-driven concepts of recipient selection to achieve the best use of this scarce resource and an improved quality of life.