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01.01.2017 | original article | Ausgabe 1-2/2017

Wiener klinische Wochenschrift 1-2/2017

Pretransplantation monitoring of HLA antibodies by complement dependent cytotoxicity and Luminex-based assays

Zeitschrift:
Wiener klinische Wochenschrift > Ausgabe 1-2/2017
Autoren:
Nataša Katalinić, Marina Fućak, Tajana Crnić, Milena Ćurković, Alma Starčević, Sanja Balen

Summary

Background

The introduction of more sensitive techniques, such as Luminex® for HLA antibody screening of patients awaiting organ transplantation has resulted in a better understanding of transplantation immunology and improvements in clinical practice.

Objective

The interpretation of the results obtained only by Luminex® can lead to inaccurate evaluation of a patient’s antibody status and unjustified rejection of a potential organ donor. The aim of this study was to demonstrate the benefits of performing HLA antibody screening in the sera of patients on the waiting list for organ transplantation by two different assays, complement dependent cytotoxicity (CDC) and Luminex®.

Methods

A retrospective analysis was performed on 563 pretransplant serum samples from 141 patients on the kidney transplantation waiting list in Rijeka, tested from March 2012 until March 2015. All samples were tested in parallel by the CDC assay and the Luminex®-based assay.

Results

Out of the 563 samples tested 302 (53.7%) tested negative for HLA antibodies and 88 (15.6%) positive by both assays. From 173 (30.7%) samples with discordant results 149 (26.5%) were CDC negative and Luminex® positive, while 24 (4.3%) were CDC positive and Luminex® negative. Among the Luminex positive patients seven did not experience any immunizing events.

Conclusion

Evaluation of the HLA antibody status in patients on a waiting list for organ transplantation should be based on the results of the both CDC and Luminex® (or other sensitive) assays in accordance to information about patient’s clinical status and exposure to immunizing events.

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