| Autor: |
Tian, Li, Hou, Li, Wang, Lixin, Xu, Hong, Xiao, Jie, Ying, Binwu |
| Předmět: |
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| Zdroj: |
Transfusion; Jun2018, Vol. 58 Issue 6, p1536-1539, 4p, 1 Chart |
| Abstrakt: |
Background: Anti-E is the most common and important RBC alloantibody in the Chinese population. Several studies have demonstrated that the production of specific RBC alloantibodies is associated with HLA-DRB1 polymorphisms. Considering that the Chinese population has its own unique characteristics of HLA-DRB1 polymorphisms, we investigate whether specific HLA-DRB1 alleles are associated with E immunization in a Chinese population.Study Design and Methods: The frequencies of HLA-DRB1 phenotypes were compared among 78 patients possessing anti-E and 192 healthy blood donors. HLA-DRB1 genotyping was carried out using sequence-based typing method. The TEPITOPEpan software was used to predict E antigen-derived anchor peptides binding to HLA-DRB1 molecules.Results: The frequency of HLA-DRB1*09:01 phenotype was significantly higher in the patients with anti-E than in healthy controls: 76.9% versus 27.6% (odds ratio, 8.7; 95% confidence interval, 4.7-16.2; corrected p value < 0.0034). One E antigen-derived anchor peptide (217WMFWPSVNS225) was predicted to bind three HLA-DRB1 molecules (HLA-DRB1*04:05, *04:17, and *13:02); however, no anchor peptide was predicted to bind HLA-DRB1*09:01.Conclusion: This study indicated that HLA-DRB1*09:01 phenotype was significantly more prevalent in E-immunized patients than the control group. It suggested that HLA-DRB1*09:01 molecule might represent a susceptibility phenotype enhancing formation of anti-E alloantibody. Further study would be necessary to identify the anchor peptide responsible for E alloimmunization by stimulation of specific T cells by peptide originating from E antigen. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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