PMID- 33767404 OWN - NLM STAT- MEDLINE DCOM- 20211013 LR - 20220720 IS - 1476-5365 (Electronic) IS - 0268-3369 (Linking) VI - 56 IP - 8 DP - 2021 Aug TI - Natural killer cell alloreactivity in HLA-haploidentical hematopoietic transplantation: a study on behalf of the CTIWP of the EBMT. PG - 1900-1907 LID - 10.1038/s41409-021-01259-0 [doi] AB - Human leukocyte antigen (HLA) class-I mismatches that trigger donor-versus-recipient natural killer (NK)-cell alloreactivity reduce the incidence of leukemia relapse and improve survival of acute myeloid leukemia patients after T-cell-depleted HLA-haplotype mismatched ("haploidentical") hematopoietic transplantation. In murine graft-versus-host disease (GvHD) models, alloreactive NK-cells also prevent GvHD. Here we report the results of a non-interventional, prospective study performed on behalf of the Cellular Therapy and Immunobiology Working Party of the European Society for Blood and Marrow Transplantation. The study was aimed at re-assessing the role of NK-cell alloreactivity in a cohort of haploidentical transplants performed in Europe between 2012 and 2015 and composed of unmanipulated, as well as T-cell-depleted transplants. One hundred thirty-eight patients with acute myeloid or lymphoid leukemias were analyzed. Eighty-six patients received ex-vivo T-cell-depleted transplants, 52 patients received unmanipulated transplants. Fifty patients were transplanted from NK alloreactive donors, 88 from non-NK alloreactive donors. NK cell alloreactivity did not impact on GvHD/relapse-free survival (GRFS) in unmanipulated transplants (HR: 1.66 (0.9-3.1), p = 0.1). In contrast, it did impact beneficially on GRFS in T-cell-depleted transplants (HR: 0.6, (0.3-1.2), p = 0.14, interaction p < 0.001). This effect was the consequence of reduced incidences of acute and chronic GvHD and non-relapse mortality. CI - (c) 2021. The Author(s), under exclusive licence to Springer Nature Limited. FAU - Ruggeri, Loredana AU - Ruggeri L AUID- ORCID: 0000-0002-3804-2551 AD - University of Perugia, Perugia, Italy. loredana.ruggeri@ospedale.perugia.it. FAU - Vago, Luca AU - Vago L AUID- ORCID: 0000-0003-4247-3175 AD - Ospedale San Raffaele and Universita Vita-Salute San Raffaele, Milano, Italy. FAU - Eikema, Diderik-Jan AU - Eikema DJ AD - EBMT Statistical Unit, Leiden, The Netherlands. FAU - de Wreede, Liesbeth C AU - de Wreede LC AD - Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands. FAU - Ciceri, Fabio AU - Ciceri F AD - Ospedale San Raffaele and Universita Vita-Salute San Raffaele, Milano, Italy. FAU - Diaz, Miguel Angel AU - Diaz MA AD - Nino Jesus Children's Hospital, Madrid, Spain. FAU - Locatelli, Franco AU - Locatelli F AD - IRRCS Ospedale Pediatrico Bambino Gesu, Rome, Italy. FAU - Jindra, Pavel AU - Jindra P AUID- ORCID: 0000-0002-8415-7069 AD - Charles University Hospital, Pilsen, Czech Republic. FAU - Milone, Giuseppe AU - Milone G AUID- ORCID: 0000-0002-7840-4414 AD - Ospedale Ferrarotto, Catania, Italy. FAU - Diez-Martin, Jose Luis AU - Diez-Martin JL AD - Hospital Gregorio Maranon, Madrid, Spain. FAU - Perez-Simon, Jose Antonio AU - Perez-Simon JA AD - Hospital Universitario Virgen del Rocio, Sevilla, Spain. FAU - Merluzzi, Mara AU - Merluzzi M AD - University of Perugia, Perugia, Italy. FAU - Koster, Linda AU - Koster L AD - EBMT Data Office Leiden, Leiden, The Netherlands. FAU - van der Werf, Steffie AU - van der Werf S AD - EBMT Data Office Leiden, Leiden, The Netherlands. FAU - van Biezen, Anja AU - van Biezen A AD - EBMT Data Office Leiden, Leiden, The Netherlands. FAU - Toubert, Antoine AU - Toubert A AUID- ORCID: 0000-0002-7308-7317 AD - Hopital Saint-Louis, APHP, INSERM U1160, Universite Paris Diderot, Paris, France. FAU - Nagler, Arnon AU - Nagler A AUID- ORCID: 0000-0002-0763-1265 AD - Chaim Sheba Medical Center, Tel-Hashomer, Israel. FAU - Chabannon, Christian AU - Chabannon C AUID- ORCID: 0000-0002-3755-4889 AD - Institut Paoli-Calmettes, Centre de Lutte Contre le Cancer; Centre d'Investigations Cliniques en Biotherapie, Universite d'Aix-Marseille, Inserm CBT, Marseille, France. FAU - Bonini, Chiara AU - Bonini C AD - Ospedale San Raffaele and Universita Vita-Salute San Raffaele, Milano, Italy. FAU - Velardi, Andrea AU - Velardi A AD - University of Perugia, Perugia, Italy. LA - eng PT - Journal Article DEP - 20210325 PL - England TA - Bone Marrow Transplant JT - Bone marrow transplantation JID - 8702459 SB - IM MH - Animals MH - *Graft vs Host Disease/prevention & control MH - *Hematopoietic Stem Cell Transplantation MH - Humans MH - Killer Cells, Natural MH - *Leukemia, Myeloid, Acute/therapy MH - Mice MH - Prospective Studies MH - Transplantation, Haploidentical EDAT- 2021/03/27 06:00 MHDA- 2021/10/14 06:00 CRDT- 2021/03/26 06:49 PHST- 2020/10/31 00:00 [received] PHST- 2021/02/23 00:00 [accepted] PHST- 2021/02/04 00:00 [revised] PHST- 2021/03/27 06:00 [pubmed] PHST- 2021/10/14 06:00 [medline] PHST- 2021/03/26 06:49 [entrez] AID - 10.1038/s41409-021-01259-0 [pii] AID - 10.1038/s41409-021-01259-0 [doi] PST - ppublish SO - Bone Marrow Transplant. 2021 Aug;56(8):1900-1907. doi: 10.1038/s41409-021-01259-0. Epub 2021 Mar 25.