Impact of HLA-DPB1 Matching in Unrelated Allogeneic Stem Cell Transplantation: Results of Two Centers From Turkey

Kantarcioglu B., Bekoz H. S. , Hindilerden I. Y. , Kivanc D. , Ogret Y. D. , Besisik S. , ...Daha Fazla

UHOD-ULUSLARARASI HEMATOLOJI-ONKOLOJI DERGISI, cilt.27, ss.74-84, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 27 Konu: 2
  • Basım Tarihi: 2017
  • Doi Numarası: 10.4999/uhod.171736
  • Sayfa Sayıları: ss.74-84


In this study, we retrospectively examined 34 donor/recipient transplant pairs fully tested for the alleles HLA-A, B, C, DRB1, DQB1 and DPB1 in two different centers in Istanbul, Turkey. HLA-DPB1 disparity in at least one antigen level was 79.6% and only 20.6% of transplant pairs were fully identical for HLA-DPB1, in our study group. Neutrophil and thrombocyte engraftment successfully occurred in the entire study group. When the occurrence of severe (Grade III-IV) aGVHD was taken into account, we have observed that, non-permissive HLA-DPB1 mismatches were a significant factor for development of severe aGVHD (p= 0.019). There was a trend of increasing significance for the gut (p= 0.006) and liver (p: 0.054) aGVHD but not for skin aGVHD in non-permissive HLA-DPB1 mismatched transplantations. In multivariate analysis, non-permissive HLA-DPB1 mismatches remained as an independent factor for severe aGVHD. Our results did not show a significant impact of HLA-DPB1 mismatches on relapse. In survival analysis, both HLA-DPB1 disparities and non-permissive mismatches showed a decreasing trend of event free and overall survival times. Considering these results during donor selection may improve transplant outcomes in the setting of unrelated ASCT.