PMID- 36385618 OWN - NLM STAT- MEDLINE DCOM- 20230222 LR - 20230314 IS - 1365-2141 (Electronic) IS - 0007-1048 (Linking) VI - 200 IP - 5 DP - 2023 Mar TI - Human leukocyte antigen evolutionary divergence influences outcomes of paediatric patients and young adults affected by malignant disorders given allogeneic haematopoietic stem cell transplantation from unrelated donors. PG - 622-632 LID - 10.1111/bjh.18561 [doi] AB - High genetic heterogeneity in the human leukocyte antigen (HLA) increases the likelihood of efficient immune response to pathogens and tumours. As measure of HLA diversity, HLA evolutionary divergence (HED) has been shown to predict the response of tumours to immunotherapy and haematopoietic stem cell transplantation (HSCT) in adults. We retrospectively investigated the association of HED with outcomes of 153 paediatric/young adults patients, treated for malignant disorders with HSCT from 9-10/10 HLA-matched unrelated donors. HED was calculated as pairwise genetic distance between alleles in patient HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1, using the locus median to stratify patients with 'high' or 'low' HED. Patients with high HED-B and -DRB1 showed significantly improved disease-free survival (DFS), especially when combined (70.8% vs 53.7% p = 0.008). High HED-B + -DRB1 was also associated with improved overall survival (OS) (82.1 vs 66.4% p = 0.014), and concomitant reduction of non-relapse-mortality (5.1% vs 21.1% p = 0.006). The impact on OS and DFS of combined HED-B + -DRB1 was confirmed in multivariate analysis [hazard ratio (HR) 0.39, p = 0.009; and HR 0.45, p = 0.007 respectively]. Only high HED scores for HLA-DPB1 were associated, in univariate analysis, with reduced incidence of relapse (15.9% vs 31.1%, p = 0.03). These results support HED as prognostic marker in allogeneic HSCT and, if confirmed in larger cohorts, would allow its use to inform clinical risk and potentially influence clinical practice. CI - (c) 2022 The Authors. British Journal of Haematology published by British Society for Haematology and John Wiley & Sons Ltd. FAU - Merli, Pietro AU - Merli P AUID- ORCID: 0000-0001-6426-4046 AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Crivello, Pietro AU - Crivello P AUID- ORCID: 0000-0001-9668-5013 AD - Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany. FAU - Strocchio, Luisa AU - Strocchio L AUID- ORCID: 0000-0002-5993-0857 AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Pinto, Rita Maria AU - Pinto RM AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Algeri, Mattia AU - Algeri M AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Del Bufalo, Francesca AU - Del Bufalo F AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Pagliara, Daria AU - Pagliara D AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Becilli, Marco AU - Becilli M AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Carta, Roberto AU - Carta R AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Gaspari, Stefania AU - Gaspari S AUID- ORCID: 0000-0002-1387-0836 AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Galaverna, Federica AU - Galaverna F AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Quagliarella, Francesco AU - Quagliarella F AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Boz, Giulia AU - Boz G AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Catanoso, Maria Luigia AU - Catanoso ML AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Boccieri, Emilia AU - Boccieri E AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Troiano, Maria AU - Troiano M AD - Laboratory of Transplant Immunogenetics, Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Fleischhauer, Katharina AU - Fleischhauer K AUID- ORCID: 0000-0002-5827-8000 AD - Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany. AD - German Cancer Consortium, Partner Site Essen/Dusseldorf, Heidelberg, Germany. FAU - Andreani, Marco AU - Andreani M AUID- ORCID: 0000-0003-3451-3624 AD - Laboratory of Transplant Immunogenetics, Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. FAU - Locatelli, Franco AU - Locatelli F AUID- ORCID: 0000-0002-7976-3654 AD - Department of Hematology/Oncology, Cell and Gene Therapy, IRCCS Bambino Gesu Children's Hospital, Rome, Italy. AD - Catholic University of the Sacred Heart, Department of Life Sciences and Public Health, Rome, Italy. LA - eng GR - DFG FL 843/1-1/Deutsche Forschungsgemeinschaft/ GR - DKMS-SLS-MHG-2018-01/Deutsche Knochermarkspenderdatei/ GR - Joseph-Senker Stiftung/ GR - GR-2011-02350175/Ministero della Salute/ GR - DJCLS 11 R/2021/Deutsche Jose Carreras Leukamie Stiftung/ GR - DJCLS 20R/2019/Deutsche Jose Carreras Leukamie Stiftung/ PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20221116 PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 SB - IM MH - Humans MH - Child MH - Young Adult MH - Unrelated Donors MH - Retrospective Studies MH - Histocompatibility Testing MH - *Hematopoietic Stem Cell Transplantation/adverse effects MH - *Neoplasms/etiology MH - *Graft vs Host Disease OTO - NOTNLM OT - haematopoietic stem cell transplantationhuman leukocyte antigen (HLA)HLA evolutionary divergenceleukaemiapaediatric EDAT- 2022/11/18 06:00 MHDA- 2023/02/22 06:00 CRDT- 2022/11/17 11:21 PHST- 2022/10/29 00:00 [revised] PHST- 2022/07/07 00:00 [received] PHST- 2022/10/31 00:00 [accepted] PHST- 2022/11/18 06:00 [pubmed] PHST- 2023/02/22 06:00 [medline] PHST- 2022/11/17 11:21 [entrez] AID - 10.1111/bjh.18561 [doi] PST - ppublish SO - Br J Haematol. 2023 Mar;200(5):622-632. doi: 10.1111/bjh.18561. Epub 2022 Nov 16.