PMID- 35833981 OWN - NLM STAT- MEDLINE DCOM- 20220816 LR - 20220816 IS - 1432-0584 (Electronic) IS - 0939-5555 (Print) IS - 0939-5555 (Linking) VI - 101 IP - 9 DP - 2022 Sep TI - An association between a positive direct antiglobulin test and HLA-DR12 in COVID-19. PG - 1959-1969 LID - 10.1007/s00277-022-04921-9 [doi] AB - SARS-CoV-2 infection has been reported to be associated with a positive direct antiglobulin test (DAT). In this study, an analysis of 40 consecutive coronavirus disease 2019 (COVID-19) cases from December 2020 to September 2021 in Japan revealed that patients of 70 years and over were predisposed to a positive DAT. DAT positivity was related to a decrease in the hemoglobin level. Anemia in DAT-positive COVID-19 patients was attributed to hemolysis, which was corroborated by high reticulocyte counts and an increase in the red blood cell distribution width. Human leukocyte antigen (HLA)-DRB1*12:01 and DRB1*12:02 were exclusively found in DAT-positive COVID-19 patients. In silico assays for the Spike protein of SARS-CoV-2 predicted several common core peptides that met the criteria for a B cell epitope and strong binding to both HLA-DRB1*12:01 and DRB1*12:02. Among these peptides, the amino acids sequence TSNFR, which is found within the S1 subunit of SARS-CoV-2 Spike protein, is shared by human blood group antigen Rhesus (Rh) CE polypeptides. In vitro analysis showed that the expression of HLA-DR in CD4(+) T cells and CD8(+) T cells from a DAT-positive patient was increased after pulsation with TSNFR-sequence-containing peptides. In summary, positive DAT is related to enhanced anemia and to HLA-DR12 in the Japanese population. A peptide sequence within SARS-CoV-2 Spike protein may act as an epitope for IgG binding to RBCs in DAT-positive COVID-19 patients. CI - (c) 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. FAU - Matsuura, Hideaki AU - Matsuura H AD - Department of Blood Transfusion, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. AD - Department of Cellular and Molecular Biology, Fujita Health University School of Medical Sciences, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. FAU - Fujii, Sumie AU - Fujii S AD - Department of Transfusion Medicine and Cell Therapy, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. FAU - Matsui, Yusuke AU - Matsui Y AD - Gladstone Institute of Virology and Immunology, University of California, San Francisco, San Francisco, CA, USA. FAU - Sugiura, Yukari AU - Sugiura Y AD - Department of Blood Transfusion, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. FAU - Akiyama, Hidehiko AU - Akiyama H AD - Department of Cellular and Molecular Biology, Fujita Health University School of Medical Sciences, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. FAU - Miura, Yasuo AU - Miura Y AUID- ORCID: 0000-0001-9654-1300 AD - Department of Blood Transfusion, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. ymiura@fujita-hu.ac.jp. AD - Department of Transfusion Medicine and Cell Therapy, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. ymiura@fujita-hu.ac.jp. LA - eng PT - Journal Article DEP - 20220714 PL - Germany TA - Ann Hematol JT - Annals of hematology JID - 9107334 RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (HLA-DR Serological Subtypes) RN - 0 (HLA-DR12 antigen) RN - 0 (Spike Glycoprotein, Coronavirus) RN - 0 (spike protein, SARS-CoV-2) SB - IM MH - CD8-Positive T-Lymphocytes MH - *COVID-19 MH - Coombs Test MH - Epitopes, T-Lymphocyte/chemistry MH - HLA-DR Serological Subtypes MH - Humans MH - SARS-CoV-2 MH - Spike Glycoprotein, Coronavirus PMC - PMC9281373 OTO - NOTNLM OT - COVID-19 OT - Direct antiglobulin test OT - Epitope OT - Human leukocyte antigen OT - Red blood cell COIS- The authors declare no competing interests. EDAT- 2022/07/15 06:00 MHDA- 2022/08/17 06:00 PMCR- 2022/07/14 CRDT- 2022/07/14 11:15 PHST- 2022/03/14 00:00 [received] PHST- 2022/06/28 00:00 [accepted] PHST- 2022/07/15 06:00 [pubmed] PHST- 2022/08/17 06:00 [medline] PHST- 2022/07/14 11:15 [entrez] PHST- 2022/07/14 00:00 [pmc-release] AID - 10.1007/s00277-022-04921-9 [pii] AID - 4921 [pii] AID - 10.1007/s00277-022-04921-9 [doi] PST - ppublish SO - Ann Hematol. 2022 Sep;101(9):1959-1969. doi: 10.1007/s00277-022-04921-9. Epub 2022 Jul 14.