Abstract:
:The acquired form of idiopathic thrombotic thrombocytopenic purpura (TTP) is an autoimmune disease, in which the underlying ADAMTS13-deficiency is caused by inhibitory autoantibodies against the protease. Human leukocyte antigens (HLA), responsible for antigen presentation, play an important role in the development of antibodies. The loci coding HLA DR and DQ molecules are inherited in linkage as haplotypes. The c.1858C>T polymorphism of the PTPN22 gene, which codes a protein tyrosine phosphatase important in lymphocyte activation, predisposes to a number of autoimmune diseases. We determined the HLA-DRB1-DQB1 haplotypes and the PTPN22 c.1858C>T genotypes in 75 patients with acquired idiopathic TTP and in healthy controls, in order to assess the role of these genetic factors and their interactions in the susceptibility to TTP. We found that the carrier frequencies of the DRB1∗11-DQB1∗03 and DRB1∗15-DQB1∗06 haplotypes were higher, while those of the DRB1∗07-DQB1∗02 and DRB1∗13-DQB1∗06 haplotypes were lower in TTP patients. There was no difference in the overall frequency of the PTPN22 c.1858T allele between TTP patients and controls. In conclusion, we identified four HLA-DRB1-DQB1 haplotypes associated with an increased (DRB1∗11-DQB1∗03 and DRB1∗15-DQB1∗06) or a decreased (DRB1∗07-DQB1∗02 and DRB1∗13-DQB1∗06) susceptibility to acquired idiopathic TTP.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Sinkovits G,Szilágyi Á,Farkas P,Inotai D,Szilvási A,Tordai A,Rázsó K,Réti M,Prohászka Zdoi
10.1016/j.humimm.2016.11.005subject
Has Abstractpub_date
2017-02-01 00:00:00pages
80-87issue
2eissn
0198-8859issn
1879-1166pii
S0198-8859(16)30509-2journal_volume
78pub_type
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