Is there any impact of HLA-DPB1 disparity in 10/10 HLA-matched unrelated hematopoietic SCT? Results of a French multicentric retrospective study

Bone Marrow Transplant. 2015 Feb;50(2):232-6. doi: 10.1038/bmt.2014.253. Epub 2014 Nov 3.

Abstract

We retrospectively analyzed the impact of HLA-DPB1 mismatches in a large cohort of 1342 French patients who underwent 10/10 HLA-matched unrelated HSCT. A significant impact of HLA-DPB1 allelic mismatches (2 vs 0) was observed in severe acute GVHD (aGVHDIII-IV) (risk ratio (RR)=1.73, confidence interval (CI) 95% 1.09-2.73, P=0.019) without impact on OS, TRM, relapse and chronic GVHD (cGVHD). According to the T-cell epitope 3 (TCE3)/TCE4 HLA-DPB1 disparity algorithm, 37.6% and 58.4% pairs had nonpermissive HLA-DPB1, respectively. TCE3 and TCE4 disparities had no statistical impact on OS, TRM, relapse, aGVHD and cGVHD. When TCE3/TCE4 disparities were analyzed in the graft-vs-host or host-vs-graft (HVG) direction, only a significant impact of TCE4 nonpermissive disparities in the HVG direction was observed on relapse (RR=1.34, CI 95% 1.00-1.80, P=0.048). In conclusion, this French retrospective study shows an adverse prognosis of HLA-DPB1 mismatches (2 vs 0) on severe aGVHD and of nonpermissive TCE4 HVG disparities on relapse after HLA-matched 10/10 unrelated HSCT.

Publication types

  • Clinical Trial
  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Algorithms*
  • Allografts
  • Child
  • Child, Preschool
  • Female
  • France
  • Graft vs Host Disease / mortality
  • Graft vs Host Disease / prevention & control
  • HLA-DP beta-Chains*
  • Hematologic Neoplasms / mortality
  • Hematologic Neoplasms / therapy*
  • Hematopoietic Stem Cell Transplantation*
  • Host vs Graft Reaction
  • Humans
  • Male
  • Middle Aged
  • Unrelated Donors*

Substances

  • HLA-DP beta-Chains
  • HLA-DPB1 antigen