Heat inactivation can differentiate between IgG and IgM antibodies in the pretransplant cross match.

Abstract:

:The presence of IgG antibodies in the pretransplant cross-match (XM) test results in hyperacute rejection, but IgM antibodies are inconsequential. The XM should be able to differentiate between IgG and IgM antibodies. This study evaluated 3 methods. This study was based on 500 patients for whom XM were performed between 2004 and 2006 with all 3 techniques. Two patient sera were used: normal serum and heat inactivated serum, which was prepared by incubating patient serum at 63 degrees C for 10 minutes to destroy IgM antibodies. The efficiencies of flow cytometry XM (FC-XM), dithiothreitol complement-dependent microlymphocytotoxicity (DTT/CDC-XM), and heat inactivation (HI-CDC-XM) to differentiate between IgG and IgM were evaluated by using both sera. Patients with positive XM, and negative HI-CDC-XM were reported as negative XM. During the study period, there were 70 patients with positive B-cell XM. Forty-nine became negative after HI-XM, and 21 remained positive. Only 34 cases became negative after DTT-CDC-XM and 36 remained positive. HI-CDC-XM was comparable to FC-XM; all patients testing negative with this technique experienced successful renal transplantations without hyperacute, accelerated, or acute rejection episodes. Our study showed that HI-CDC-XM was effective at exclude donor-specific IgM antibodies, a result which was comparable to FCXM to detect only IgG antibodies. HI is simple and rapid and does not involve any extra equipment or cost.

journal_name

Transplant Proc

authors

Al-Muzairai IA,Mansour M,Almajed L,Alkanderi N,Alshatti N,Samhan M

doi

10.1016/j.transproceed.2008.07.045

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

2198-9

issue

7

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(08)00882-8

journal_volume

40

pub_type

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