Detection of anti-HLA antibodies with flow cytometry in needle core biopsies of renal transplants recipients with chronic allograft nephropathy.

Abstract:

:The aim of this study was to assess the feasibility of detecting anti-HLA antibodies in eluates from needle core biopsies of renal transplants with chronic allograft nephropathy. Two methods of screening, the enzyme-linked immunosorbent assay (ELISA) and flow cytometry (FlowPRA) were compared. Twenty renal transplants with CAN were removed after irreversible graft failure. To assess the feasibility of detecting anti-HLA antibodies in small samples, needle core biopsies were sampled at the same place as surgical samples and at a second cortical area. Antibodies were eluted with an acid elution kit and anti-class I and class II IgG HLA antibodies detected using ELISA and flow cytometry. Flow cytometry was found to be more sensitive than ELISA for detecting anti-HLA antibodies in eluates from renal transplants with CAN (95% vs. 75% of positive cases). Detection of anti-HLA antibodies showed good agreement between surgical samples and needle core biopsies performed at the same place for anti-class I (80% vs. 65%, r=0.724 P<0.01) and anti-class II HLA antibodies (70% vs. 55%, r=0.827 P<0.01). In addition, differences in the detection of anti-class I HLA antibodies in needle core biopsies sampled at different sites suggests that immunization to class I donor antigen could be underestimated in needle core biopsy samples. These data indicate that anti-HLA antibodies can be detected in needle core biopsies from renal transplants. Provided further evaluation is done, elution might be a complementary method to detect anti-HLA antibodies when they are bound to the transplant.

journal_name

Transplantation

journal_title

Transplantation

authors

Martin L,Guignier F,Bocrie O,D'Athis P,Rageot D,Rifle G,Justrabo E,Mousson C

doi

10.1097/01.tp.0000156164.54216.de

subject

Has Abstract

pub_date

2005-05-27 00:00:00

pages

1459-61

issue

10

eissn

0041-1337

issn

1534-6080

pii

00007890-200505270-00033

journal_volume

79

pub_type

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