PMID- 26544669 OWN - NLM STAT- MEDLINE DCOM- 20160718 LR - 20160216 IS - 1545-5017 (Electronic) IS - 1545-5009 (Linking) VI - 63 IP - 4 DP - 2016 Apr TI - Loss of Mismatched HLA on the Leukemic Blasts of Patients With Relapsed Lymphoid Malignancies Following Bone Marrow Transplantation From Related Donors With HLA Class II Mismatches in the Graft Versus Host Direction. PG - 709-11 LID - 10.1002/pbc.25819 [doi] AB - Mechanisms of relapse of acute lymphoblastic leukemia (ALL) after human leukocyte antigen (HLA) class II mismatched hematopoietic stem cell transplantation (HSCT) remain unclear. We report two children with relapsed ALL after HSCT from related donors with HLA-DRB1 and -DQB1 mismatches in the graft versus host direction. One lost HLA-DRB1, DQB1, and DPB1 alleles, and the other lost one HLA haplotype of the leukemic blasts at relapse. HLA class II loss may be a triggering event for ALL relapse after partially HLA-mismatched-related HSCT. In addition, HLA typing of relapsed leukemic blasts could be vital in the selection of retransplant donors. CI - (c) 2015 Wiley Periodicals, Inc. FAU - Hirabayashi, Koichi AU - Hirabayashi K AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Kurata, Takashi AU - Kurata T AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Horiuchi, Kazuki AU - Horiuchi K AD - Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan. FAU - Saito, Shoji AU - Saito S AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Shigemura, Tomonari AU - Shigemura T AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Tanaka, Miyuki AU - Tanaka M AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Yanagisawa, Ryu AU - Yanagisawa R AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Matsuda, Kazuyuki AU - Matsuda K AD - Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan. FAU - Sakashita, Kazuo AU - Sakashita K AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Koike, Kenichi AU - Koike K AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. FAU - Nakazawa, Yozo AU - Nakazawa Y AD - Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan. LA - eng PT - Case Reports PT - Journal Article DEP - 20151106 PL - United States TA - Pediatr Blood Cancer JT - Pediatric blood & cancer JID - 101186624 RN - 0 (HLA-DP beta-Chains) RN - 0 (HLA-DPB1 antigen) RN - 0 (HLA-DQ beta-Chains) RN - 0 (HLA-DQB1 antigen) RN - 0 (HLA-DRB1 Chains) RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Alleles MH - Child MH - Female MH - Graft vs Host Disease/*genetics/immunology MH - HLA-DP beta-Chains/genetics MH - HLA-DQ beta-Chains/genetics MH - HLA-DRB1 Chains/genetics MH - Haplotypes MH - Hematopoietic Stem Cell Transplantation/*methods MH - Histocompatibility MH - Histocompatibility Antigens Class II/*genetics/immunology MH - Humans MH - Infant MH - Male MH - Neoplasm Recurrence, Local/*genetics/immunology MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics/immunology/*surgery OTO - NOTNLM OT - HLA class II OT - HLA loss OT - acute lymphoblastic leukemia OT - relapse OT - stem cell transplantation EDAT- 2015/11/07 06:00 MHDA- 2016/07/19 06:00 CRDT- 2015/11/07 06:00 PHST- 2015/05/30 00:00 [received] PHST- 2015/09/17 00:00 [revised] PHST- 2015/10/04 00:00 [accepted] PHST- 2015/11/07 06:00 [entrez] PHST- 2015/11/07 06:00 [pubmed] PHST- 2016/07/19 06:00 [medline] AID - 10.1002/pbc.25819 [doi] PST - ppublish SO - Pediatr Blood Cancer. 2016 Apr;63(4):709-11. doi: 10.1002/pbc.25819. Epub 2015 Nov 6.