Transplanting the highly sensitized patient: The emory algorithm

Am J Transplant. 2006 Oct;6(10):2307-15. doi: 10.1111/j.1600-6143.2006.01521.x. Epub 2006 Aug 25.

Abstract

Renal transplant patients sensitized to HLA antigens comprise nearly one-third of the UNOS wait-list and receive 14% of deceased donor (DD) transplants, a rate half that of unsensitized patients. Between 1999 and 2003, we performed 492 adult renal transplants from DD; 120 patients (approximately 25%) had a panel reactive antibody (PRA) of >30%, with nearly half (n = 58) having a PRA of >80%. Our approach is based upon high-resolution solid-phase HLA antibody analysis to identify class I/II antibodies and a 'virtual crossmatch' to predict compatible donor/recipient combinations. Recipients are excluded from the United Network for Organ Sharing match run if donors possess unacceptable antigens. Thus, when sensitized patients appear on the match run, they have a high probability of a negative final crossmatch. Here, we describe our 5-year experience with this approach. Five-year graft survival ranged from 66% to 70% among unsensitized (n = 272), moderately sensitized (PRA < 30%, n = 100) and highly sensitized (>30% PRA; n = 120) patients, equal to the average national graft survival (65.7%). The application of this approach (the Emory Algorithm) provides a logical and systematic approach to improve the access of sensitized patients to DD organs and promote more equitable allocation to a highly disadvantaged group of patients awaiting renal transplantation.

MeSH terms

  • Algorithms*
  • B-Lymphocytes / immunology*
  • Female
  • Flow Cytometry
  • Follow-Up Studies
  • Graft Rejection / immunology*
  • Graft Rejection / prevention & control
  • Graft Survival
  • HLA Antigens / immunology
  • Histocompatibility Antigens Class I / immunology
  • Histocompatibility Antigens Class II / immunology
  • Humans
  • Immunity, Cellular*
  • Immunization / methods*
  • Immunosuppressive Agents / therapeutic use
  • Kidney Transplantation / immunology*
  • Male
  • Retrospective Studies
  • Risk Factors
  • T-Lymphocytes / immunology*
  • Transplantation, Homologous

Substances

  • HLA Antigens
  • Histocompatibility Antigens Class I
  • Histocompatibility Antigens Class II
  • Immunosuppressive Agents