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Binder TMC, Kelsch R, Wikner JM, Aly L, Brendel C, Alster I, Kühnl P, Finckh U, Eiermann TH. A rare ancestral HLA-DRB1(∗)15:01̃DQB1(∗)02:01 haplotype and its reversion in the same Western European family. Hum Immunol 2015; 76:124-8. [PMID: 25636575 DOI: 10.1016/j.humimm.2015.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 12/17/2014] [Accepted: 01/14/2015] [Indexed: 11/20/2022]
Abstract
The HLA-DR and -DQ loci are close neighbors on chromosome 6 that are highly linked. Many common associations between HLA-DR and DQ-alleles are known, normally transmitted as HLA-DR̃DQ haplotypes from one generation to another. Reports of very recent genetic rearrangements between HLA-DR and -DQ are rarely found in the literature. In Europeans haplotypes containing DRB1(∗)15:01, DQB1(∗)02:01, and DQA1(∗)05:01 have not been reported before. We report the finding of the rare HLA haplotype A(∗)24:02̃C(∗)07:02̃B(∗)07:02̃MICA(∗)008:01̃DRB5(∗)01:01̃DRB1(∗)15:01̃DQA1(∗)05:01̃DQB1(∗)02:01̃DPB1(∗)04:01 in a German stem cell donor with East Frisian ancestry. Our observation suggests a rare ancestral recombination between the DR and DQ loci. In order to investigate this haplotype, we typed 50/74 members of the family encompassing four generations for HLA classes I and II by serological and molecular methods. The rare haplotype was identified in 12 heterozygous carriers. Furthermore, we identified and further characterized a putative crossing over event resulting in its reversion to a common haplotype.
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Affiliation(s)
- Thomas M C Binder
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Reinhard Kelsch
- Institute of Transfusion Medicine and Transplantation Immunology, University Clinics of Muenster, Muenster, Germany
| | - Julia M Wikner
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lilian Aly
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Neurology, Klinikum Rechts der Isar, Munich, Germany
| | - Cornelia Brendel
- Department of Hematology, Oncology and Immunology, Philipps University Marburg and Universitätsklinikum Giessen und Marburg, Germany
| | - Ina Alster
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Peter Kühnl
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Thomas H Eiermann
- Diagnostic Center, Institute of Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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