Distribution of ABO blood group antibody titers in pediatric patients awaiting renal transplantation: implications for organ allocation policy.

Abstract:

BACKGROUND:Blood group-incompatible transplantation is one strategy used when a potential recipient does not have a compatible living donor. Current practice includes desensitization strategies to reduce antibody titers. However, when antibodies are low, in cardiac transplantation in neonates for example, no desensitization is required. This study is the first to examine the distribution of ABO blood group antibody titers in a population of pediatric patients on the deceased-donor renal transplantation waiting list. METHODS:All patients from two pediatric nephrology centers active on the national deceased-donor waiting list had antibody titers (total immunoglobulin load) measured. A simulation modeling the effect of allocating blood group-incompatible deceased-donor kidneys to those patients with titers of 16 or lower was developed. RESULTS:Twenty-four children were screened; eight (33.3%) had titers of either anti-A or anti-B antibodies of 8 or lower. A further three (12.5%) had either an anti-A or anti-B antibody titer of 16. Blood group A or B patients had lower antibody levels than blood group O patients. In blood group O patients, levels of anti-A antibodies were higher than anti-B antibodies (Wilcoxon signed rank test, P=0.028). The simulation model showed that a change in organ allocation policy would increase pediatric transplant activity by 2.2% and reduce the median waiting time for a transplant. CONCLUSION:This allocation strategy may be of particular benefit to those pediatric patients who have been on the deceased-donor waiting list for a long time or those with a high calculated reaction frequency.

journal_name

Transplantation

journal_title

Transplantation

authors

Barnett AN,Hudson A,Hadjianastassiou VG,Marks SD,Reid CJ,Maggs TP,Vaughan R,Mamode N

doi

10.1097/TP.0b013e31825b7608

subject

Has Abstract

pub_date

2012-08-27 00:00:00

pages

362-8

issue

4

eissn

0041-1337

issn

1534-6080

journal_volume

94

pub_type

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