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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bettens, F. Nicoloso de Faveri, G. Tiercy, J-M |
| Description | Country affiliation: Switzerland Author Affiliation: Bettens F ( Transplantation Immunology Unit, National Reference Laboratory for Histocompatibility, University Hospital, 24 rue Micheli-du-Crest, Geneva, Switzerland.) |
| Abstract | In unrelated hematopoietic stem cell transplantation (HSCT), human leukocyte antigen (HLA)-C locus incompatibilities occur frequently and are associated with increased risk of posttransplant complications. Because HLA-B51 is associated with a high rate of Cw disparities, we performed a comprehensive four-digit typing analysis of 140 ABCDRB1 B51 genotypes proven by pedigree analysis and 311 unrelated donors selected for 75 B51-positive patients. In addition, 145 A1/Ax-B8/B51-DR3/DRx donors were HLA typed at a high-resolution level and tested for three microsatellite (Msat) polymorphisms located in the HLA class I and III regions. Based on these data sets, 182 different ABCDR haplotypes with 14 different B-Cw associations were detected. Rates of Cw mismatches were shown to be highly correlated with the ABDRB1 haplotypes. We have computed 21 B51 haplotypes that disclose a high probability of HLA-C allele matching and 30 haplotypes with a low (<25%) probability. The HLA-C allele frequency profiles were quite different in these two groups, with a more heterogeneous distribution in the low matching probability group. HLA-Cw*1502 was inversely correlated with the likelihood to identify a Cw-mismatched donor: it was present in 61% of the high vs 18% of the low probability group (P < 0.0001). The analysis of three Msats in the class I and III regions showed a higher allelic diversity in B51-positive haplotypes compared with the conserved A1-B8-DR3 haplotype. HLA-B51 haplotypes therefore exhibit a high diversity at the level of B-Cw associations and of non-HLA polymorphisms in the class I and III regions. Such heterogeneity negatively impacts on overall matching in HSCT. |
| File Format | HTM / HTML |
| ISSN | 20592302 |
| Issue Number | 4 |
| Volume Number | 73 |
| e-ISSN | 20592310 |
| Journal | Tissue Antigens |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2009-04-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Genetics Discipline Immunology Genetic Variation Hla-b Antigens Genetics Haplotypes Hematopoietic Stem Cell Transplantation Genetics, Population Genotype Hla-b51 Antigen Hla-c Antigens Histocompatibility Testing Humans Microsatellite Repeats Registries Tissue Donors Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Immunology and Allergy Immunology |
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