Is HLA class II susceptibility to primary antiphospholipid syndrome different from susceptibility to secondary antiphospholipid syndrome?

被引:13
作者
Freitas, MVC [1 ]
da Silva, LM [1 ]
Deghaide, NHS [1 ]
Donadi, EA [1 ]
Louzada, P [1 ]
机构
[1] Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Clin Med, Div Clin Immunol, BR-14048900 Ribeirao Preto, SP, Brazil
关键词
anticardiolipin antibodies (aCL); antiphospholipid syndrome (APS); Brazilians; HLA;
D O I
10.1191/0961203304lu520oa
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To assess whether the major histocompatibility complex (MHC) profile of patients presenting with primary antiphospholipid syndrome (PAPS) is different from that of patients with secondary antiphospholipid syndrome ( SAPS), we studied 123 patients, 34 of whom presented PAPS and 35 SAPS due to systemic lupus erythematosus (SLE), 54 SLE patients without antiphospholipid syndrome (APS), and 166 controls. HLA-DRB1 and DQB1 alleles were typed using amplified DNA hybridized with sequence-specific primers. Compared to controls, PAPS patients exhibited a nonsignificantly increased frequency of DR53-associated alleles, and SAPS patients presented an increased frequency of HLA-DRB1*03 alleles (corrected P = 0.05). In addition, HLA- DRB1*03 alleles were over-represented in SAPS patients presenting anticardiolipin antibody (aCL) (P-c = 0.02), in SLE patients as a whole (P-c < 0.0001), and in SLE patients without APS (P-c = 0.02). The frequency of aCL among SLE patients presenting or not HLA-DRB1*03 alleles was closely similar. A trend to an increase in the frequency of the DQB1*0604 allele (14.3 versus 4.2%, P = 0.03) and of the DQB1*0302 allele (31.4 versus 12.7%, P = 0.01) was observed in SAPS. Taken together, these results indicate that the association of SAPS with HLA-DRB1*03 is due to the association with SLE and is not due to aCL, and suggest that the HLA class II profile of PAPS is different from that of SAPS.
引用
收藏
页码:125 / 131
页数:7
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