1. HLA-DRB1*01:01, but not HLA-DRB1:1503 or HLA-DRB1*11, is associated with decreased inhibitor risk in Iranian hemophilia A patients.
- Author
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Hosseini S, Arabi S, Yari F, Pourfatollah A, Rezaie N, Moazezi S, and Aghaie A
- Subjects
- Adolescent, Adult, Aged, Child, Child, Preschool, Factor VIII genetics, Female, Humans, Infant, Iran, Male, Middle Aged, Risk Factors, Alleles, Blood Coagulation Factor Inhibitors genetics, Gene Frequency, HLA-DRB1 Chains genetics, Hemophilia A genetics
- Abstract
Background/objective: Hemophilia A is a genetic disorder through which patients suffer from recurrent bleeding. This can be caused by a defect in human plasma coagulation factor VIII. High incidence of FVIII inhibitors in some severe hemophilia A patients after FVIII therapy is a considerable complication. Determination of good predictive factors can improve the safety of this treatment. HLA-II have been shown as a predictive element for inhibitor development. The goal of this study is to determine the association between HLA-DRB1*15:03, HLA-DRB1*11 and HLA-DRB1*01:01 alleles and FVIII inhibitors in severe hemophilia A patients in Iran., Materials/methods: HLA-DRB1 genotyping was performed using Multiplex sequences Specific Primers (PCR-SSP) in two groups of severe hemophilia A patients comprising 51 and 50 individuals with and without FVIII inhibitors respectively. The levels of inhibitor were determined through Nijmegen-modified Bethesda assay. HLA-DRB1 allele frequencies were compared between groups by using multiple logistic regression models., Results: HLA-DRB1*01:01 allele frequency was significantly higher in patients without inhibitor OR
adj : 2.7 (95%CI: 1.08, 6.97; P = 0.034). There wasn't any statistically significant difference in HLA-DRB1*11 allele frequency between groups ORadj : 0.7 (95%CI: 0.27, 1.82; P = 0.47). There was no connection between HLA-DRB1*15:03 and inhibitor development ORadj : 0.94 (95%CI: 0.38, 2.35; P = 0.94)., Conclusion: An association between HLA-DRB1*01:01 and paucity of FVIII inhibitor showed that this allele has probably a protective effect in severe hemophilia A patients in Iran. Determination of the predictive and protective alleles are beneficial in pre-treatment activities and decrease the risk of unsuccessful therapy with FVIII in each population., (Copyright © 2019 Elsevier Ltd. All rights reserved.)- Published
- 2019
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