PMID- 37741003 OWN - NLM STAT- MEDLINE DCOM- 20231124 LR - 20231124 IS - 1898-4002 (Electronic) IS - 1896-1126 (Linking) VI - 68 IP - 2 DP - 2023 Sep TI - Alternative donor strategy in unrelated hematopoietic stem cell transplantation - outcome with mismatched donors. PG - 332-340 LID - S1896-1126(23)00030-5 [pii] LID - 10.1016/j.advms.2023.09.003 [doi] AB - PURPOSE: This study retrospectively investigated the association between the level of human leukocyte antigen (HLA) mismatches (MMs), direction of disparities and differences at particular HLA locus on clinical outcomes of hematopoietic stem cell transplantation (HSCT). Investigated outcomes were overall survival (OS) and disease-free survival (DFS), graft-versus-host disease (GvHD), relapse and non-relapse mortality (NRM). PATIENTS AND METHODS: Study cohort included 108 adult patients transplanted between 2011 and 2021 and their 9/10 mismatched unrelated donors (MMUD). All individuals were typed for HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1 loci using Polymerase Chain Reaction-Sequence Specific Primers, PCR-Sequence Based Typing and Next-Generation Sequencing. All statistical analyses were done in the MedCalc software, version 19.2.6. RESULTS: Patients with MMs at HLA-B locus demonstrated worse OS (P ​= ​0.0440, HR ​= ​2.00, n ​= ​20). Absence of HLA-DRB5 was associated with a higher incidence of GvHD (P ​= ​0.0112, HR ​= ​1.93, n ​= ​67). A lower incidence of GvHD was observed in patients with HLA class II MMs compared to patients with HLA class I MMs (P ​= ​0.0166, HR ​= ​1.94, n ​= ​29). Finally, analysis of PIRCHE score (PS) impact revealed that patients with HLA class II PS ​> ​10 in GvH direction showed higher incidence of GvHD compared to patients with HLA class II PS ​< ​10 (P ​= ​0.0073, HR ​= ​2.01, n ​= ​55). CONCLUSION: Obtained results undisputedly indicate the necessity to further investigate this matter on a larger patient group, with focus on specific HLA alleles to define precisely priority criteria for selecting the best donor for all patients, thus improving the outcome of HSCT with an MMUD. CI - Copyright (c) 2023 Medical University of Bialystok. Published by Elsevier B.V. All rights reserved. FAU - Grubic, Zorana AU - Grubic Z AD - Tissue Typing Centre, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia. Electronic address: zgrubic@kbc-zagreb.hr. FAU - Maskalan, Marija AU - Maskalan M AD - Tissue Typing Centre, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Burek Kamenaric, Marija AU - Burek Kamenaric M AD - Tissue Typing Centre, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Desnica, Lana AU - Desnica L AD - Department of Hematology, Internal Clinic, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Mikulic, Mirta AU - Mikulic M AD - Department of Hematology, Internal Clinic, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Stingl Jankovic, Katarina AU - Stingl Jankovic K AD - Tissue Typing Centre, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Durakovic, Nadira AU - Durakovic N AD - Department of Hematology, Internal Clinic, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Serventi Seiwerth, Ranka AU - Serventi Seiwerth R AD - Department of Hematology, Internal Clinic, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Vrhovac, Radovan AU - Vrhovac R AD - Department of Hematology, Internal Clinic, University Hospital Centre Zagreb, Zagreb, Croatia. FAU - Zunec, Renata AU - Zunec R AD - Tissue Typing Centre, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia. LA - eng PT - Journal Article DEP - 20230922 PL - Netherlands TA - Adv Med Sci JT - Advances in medical sciences JID - 101276222 RN - 0 (HLA Antigens) SB - IM MH - Adult MH - Humans MH - Retrospective Studies MH - Histocompatibility Testing MH - *Hematopoietic Stem Cell Transplantation MH - HLA Antigens/genetics MH - *Graft vs Host Disease/etiology OTO - NOTNLM OT - HLA alleles OT - HLA supertypes OT - HSCT OT - Mismatch OT - PIRCHE COIS- Declaration of competing interest The authors declare no conflict of interests. EDAT- 2023/09/24 00:42 MHDA- 2023/11/24 06:42 CRDT- 2023/09/23 18:01 PHST- 2022/12/14 00:00 [received] PHST- 2023/04/06 00:00 [revised] PHST- 2023/09/06 00:00 [accepted] PHST- 2023/11/24 06:42 [medline] PHST- 2023/09/24 00:42 [pubmed] PHST- 2023/09/23 18:01 [entrez] AID - S1896-1126(23)00030-5 [pii] AID - 10.1016/j.advms.2023.09.003 [doi] PST - ppublish SO - Adv Med Sci. 2023 Sep;68(2):332-340. doi: 10.1016/j.advms.2023.09.003. Epub 2023 Sep 22.