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. 2013 Mar;30(1):37-45.
doi: 10.5152/balkanmedj.2012.071. Epub 2013 Mar 1.

Long-Term Effects of Antibodies against Human Leukocyte Antigens Detected by Flow Cytometry in the First Year after Renal Transplantation

Tülay Kılıçaslan Ayna  1 , Yaşar Calışkan  2 , Hayriye Şentürk Ciftçi  1 , Aydın Türkmen  2 , Mehmet Gürtekin  1
Affiliations

Long-Term Effects of Antibodies against Human Leukocyte Antigens Detected by Flow Cytometry in the First Year after Renal Transplantation

Tülay Kılıçaslan Ayna et al. Balkan Med J. 2013 Mar.

Abstract

Objective: In this study, we aimed to investigate the incidence, dynamics and profiles of human leukocyte antigen (HLA)-directed antibodies developed after transplantation and their impact on graft rejection and outcome in kidney recipients.

Study design: Prospective follow-up study.

Material and methods: A total of 56 kidney recipients were monitored at 1(st), 6(th) and 12(th) months for the development of anti-HLA antibodies using bead based flow-cytometry assays (Flow PRA tests).

Results: In 21 (37.5%) patients, panel reactive antibodies (PRA) was positive after transplantation, however, in 35 (62.5%) patients PRA was found negative. Twelve (57.1%) patients with post-transplantation HLA-reactive antibodies [PRA (+)] and 8 (22.9%) patients with no detectable alloantibodies [PRA (-)] were developed allograft rejection (p=0.010). In the PRA positive patient group the rates of early period infection and delayed graft function (DGF) were higher than the PRA negative patient group. Serum creatinine levels of PRA positive group at 6. and 12. months after transplantation were significantly higher than the PRA negative group (p=0.015 and p=0.048, respectively). The rejection rates of patients who had class I and II HLA antibodies were significantly higher than the patients who had either class I or II HLA antibodies (p=0.011). Acute rejection rates were significantly higher in patients who had class I and II HLA antibodies at the first month (p=0.007).

Conclusion: Higher occurrence of rejection episodes in PRA positive group may show the importance of anti-HLA antibody monitoring using Flow-PRA after renal transplantation as a prognostic marker in terms of graft survival.

Keywords: Anti-HLA antibodies; flow cytometry; renal transplantation.

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Figures

Figure 1.
Figure 1.
Relation between rejection and the rates of PRA positive and negative groups
Figure 2.
Figure 2.
Relation between rejection and the rates of transiently or permenantly positive PRAs
See this image and copyright information in PMC

References

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