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. 2011 Nov 24;118(22):5957-64.
doi: 10.1182/blood-2011-06-362111. Epub 2011 Oct 3.

Donor-specific anti-HLA Abs and graft failure in matched unrelated donor hematopoietic stem cell transplantation

Affiliations

Donor-specific anti-HLA Abs and graft failure in matched unrelated donor hematopoietic stem cell transplantation

Stefan O Ciurea et al. Blood. .

Abstract

Anti-HLA donor-specific Abs (DSAs) have been reported to be associated with graft failure in mismatched hematopoietic stem cell transplantation; however, their role in the development of graft failure in matched unrelated donor (MUD) transplantation remains unclear. We hypothesize that DSAs against a mismatched HLA-DPB1 locus is associated with graft failure in this setting. The presence of anti-HLA Abs before transplantation was determined prospectively in 592 MUD transplantation recipients using mixed-screen beads in a solid-phase fluorescent assay. DSA identification was performed using single-Ag beads containing the corresponding donor's HLA-mismatched Ags. Anti-HLA Abs were detected in 116 patients (19.6%), including 20 patients (3.4%) with anti-DPB1 Abs. Overall, graft failure occurred in 19 of 592 patients (3.2%), including 16 of 584 (2.7%) patients without anti-HLA Abs compared with 3 of 8 (37.5%) patients with DSA (P = .0014). In multivariate analysis, DSAs were the only factor highly associated with graft failure (P = .0001; odds ratio = 21.3). Anti-HLA allosensitization was higher overall in women than in men (30.8% vs 12.1%; P < .0001) and higher in women with 1 (P = .008) and 2 or more pregnancies (P = .0003) than in men. We conclude that the presence of anti-DPB1 DSAs is associated with graft failure in MUD hematopoietic stem cell transplantation.

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Figures

Figure 1
Figure 1
Cumulative incidence of ANC recovery based on HLA mismatches in HEL, LEL, anti-HLA Abs, and donor-specific anti-HLA Abs.
Figure 2
Figure 2
Representative flow cytometric analysis of class I and class II HLA Ag expression on CD34+ and CD3+ cell surface for a peripheral blood sample from a normal donor.

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