Donor selection in a pediatric stem cell transplantation cohort using PIRCHE and HLA-DPB1 typing

Wiebke Stenger1, Annette Künkele1,2,3,4, Matthias Niemann5

  • 1Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, Berlin, Germany.

Pediatric Blood & Cancer
|December 19, 2019
PubMed

Insights

Optimizing donor selection for pediatric hematopoietic stem cell transplantation (HSCT) using HLA-DPB1 and PIRCHE matching is crucial. High PIRCHE scores significantly increase graft-versus-host disease (GvHD) risk in children undergoing HSCT.

Area of Science:

  • Immunogenetics
  • Pediatric Hematology
  • Transplantation Science

Background:

  • Hematopoietic stem cell transplantation (HSCT) strategies are often adult-focused, yet pediatric HSCT differs in disease spectrum and complication risks like graft-versus-host disease (GvHD).
  • Optimizing donor selection is critical for improving outcomes in pediatric HSCT.
  • Understanding genetic factors influencing HSCT success in children is essential.

Purpose of the Study:

  • To evaluate HLA-DPB1 and Predicted Indirectly ReCognizable HLA-Epitope (PIRCHE) matching for donor selection in pediatric HSCT.
  • To minimize GvHD and other complications in children undergoing HSCT.
  • To assess the impact of HLA-DPB1 and PIRCHE matching on HSCT outcomes in a pediatric cohort.

Main Methods:

  • Analysis of HLA-DPB1 and PIRCHE matching in a pediatric cohort undergoing HSCT between 2014 and 2016 in Berlin.
  • Evaluation of the association between HLA-DPB1 mismatches and GvHD or relapse incidence.
  • Assessment of PIRCHE-I scores in relation to GvHD risk, considering HLA-DPB1 matching.

Main Results:

  • Nonpermissive HLA-DPB1 mismatches did not increase GvHD but were linked to higher relapse rates.
  • High PIRCHE-I scores significantly correlated with increased GvHD risk in pediatric HSCT recipients from matched unrelated donors.
  • The association between high PIRCHE scores and GvHD risk remained significant even after incorporating HLA-DPB1 matching.

Conclusions:

  • Implementing PIRCHE typing in donor selection for pediatric HSCT may improve outcomes.
  • PIRCHE-based donor selection could particularly benefit pediatric patients with nonmalignant diseases.
  • Further validation of PIRCHE-based donor selection in larger, multi-center pediatric cohorts is recommended.
Abstract

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