HLA antigens in psoriatic arthritis subtypes of a Spanish population

Hospital NS Covadonga, Oviedo, Spain.
Annals of the Rheumatic Diseases (Impact Factor: 10.38). 06/1990; 49(5):318-9. DOI: 10.1136/ard.49.5.318
Source: PubMed


HLA-A, B, and C antigens were studied in 104 Spanish patients with psoriatic arthritis. Different clinical features were evaluated and the patients divided into disease subsets. HLA-B17, B27, B16, and Cw6 were the most common haplotypes in the total group. The HLA-B17/Cw6 haplotype was increased in patients with oligoarthritis. The increase of antigen B17 correlated with oligoarthritis and spondarthritis, whereas Cw6 was more significant in oligoarthritis. The prevalence of the B27/Cw1 haplotype was greater in association with spondarthritis and was probably related to the B27.5 subtype linked to Cw1. A significant negative association between the B44/Cw5 haplotype and psoriatic arthritis was found. The existence of several haplotypic factors in the different subsets is discussed. Lack of one or more HLA factors is thought to be responsible for the different clinical forms of psoriatic arthritis.

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    • "It is estimated that 17% of patients with psoriatic arthritis in this region are positive for this antigen. 8 However, a study from 1990 has found positive HLA-B27 in 22% of patients with psoriatic arthritis 9 and in 2002 the observed frequency was 34%. 10 World wide the positivity of HLA-B27 may vary from 4%, as confirmed by Israeli researchers to 36.4% as observed in the Brazilian state of Minas Gerais. 11,12 "
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    ABSTRACT: HLA-B27 is associated with spondyloarthritis, a group of diseases that includes psoriatic arthritis. To describe the HLA-B27 frequency in a group of Brazilian patients with psoriatic arthritis and correlate its presence or absence with their clinical manifestations. Cross-sectional study with 44 psoriatic arthritis patients of a Rheumatology clinic. Demographic and social data were recorded, as were skin and joints clinical examination. HLA-B27 was tested. All data were processed descriptively and comparatively by appropriate software. Parametric and non parametric tests were used with 5% statistical significance. HLA-B27 was negative in 32 of the 44 patients (72,7%). Most of them were male, Caucasian, living in Rio de Janeiro, with plaque type psoriasis and average age of 52,9 years. There was statistical significant correlation between positive HLA-B27 and male gender (p=0,004). Negative HLA-B27 had a tendency to correlate with hands and wrists arthritis (p=0,07). There was an inverse significant correlation between HLA values and Schöber's test (p=0,02). Although HLA-B27 is negative in most of patients, it is significantly associated to male gender and inversely correlated with Schöber's test.
    Anais brasileiros de dermatologia 12/2012; 87(6):847-50. DOI:10.1590/S0365-05962012000600004 · 0.72 Impact Factor
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    • "The frequency of the HLA-Cw*06 phenotype in the population controls tested in the current study was within the range reported previously15 16 25 26 39–41 (table 2). "
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    ABSTRACT: Psoriasis of early onset (type I; age of onset <or=40 years) is associated with HLA-Cw*06 while the shared epitope (SE) is associated with rheumatoid arthritis susceptibility. Our aim was to investigate the role of HLA-Cw*06 and HLA-DRB1 genes (including SE) with psoriatic arthritis (PsA) susceptibility. In a case-control association study, HLA-Cw*06 phenotype frequencies were compared between patients with PsA (n = 480), psoriasis alone (n = 611) and healthy controls (n = 166). Similarly, at the HLA-DRB1 locus, phenotype and SE frequencies were compared in patients with PsA (n = 480), early undifferentiated inflammatory arthritis alone (n = 1621) and healthy controls (n = 537). The HLA-Cw*06 phenotype was associated with type I psoriasis (OR 6.9, 95% CI 4.4, 11.1, p = 2.2 x 10(-21)) and with patients with PsA having type I psoriasis (OR 5.0, 95% CI 3.2, 7.9, p = 4.39 x 10(-13)), but not with patients with PsA having type II psoriasis (age of onset >40 years). HLA-DRB1*07, in linkage disequilibrium with HLA-Cw*06, was also associated with patients with PsA having type I psoriasis (OR 2.7, 95% CI 2.1, 3.7, p<0.00001). HLA-DRB1*04 alleles and the SE were associated with undifferentiated inflammatory arthritis but not with PsA. The SE is not a PsA susceptibility locus. HLA-Cw*06 and HLA-DRB1*07 are associated with patients with PsA having type I psoriasis, suggesting that the primary association is with age of onset of psoriasis. Patients with PsA having type I psoriasis, therefore, have a genetic background different to those with type II psoriasis, and adjustment for this is necessary in future studies that investigate the genetic susceptibility of PsA.
    Annals of the rheumatic diseases 05/2008; 67(5):677-82. DOI:10.1136/ard.2007.071399 · 10.38 Impact Factor
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    • "According to this, the HLA-B*2705/Cw*0102, B*2705/Cw*02022 and B*2702/Cw*02022 were the main haplotypes found in normal and spondylitic patients in Spanish and Jewish populations [13]. Indeed, the spondylitic form of PsA was found in association with the HLA-B27/Cw1 haplotype in a Spanish population [14]. As we have shown here, the HLA-B27 antigen correlated well with the risk of uveitis and was more strongly associated with isolated forms of spondylitis, whereas HLA-Cw*0702 was not related to the presence of uveitis and was distributed equally between the three subgroups of spondylitis. "
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    ABSTRACT: The aim of the present study was to evaluate the relative contribution of human leukocyte antigen (HLA)-C locus alleles in determining the risk and the clinical expression of psoriatic arthritis (PsA). One hundred PsA patients were randomly selected and grouped into three disease subsets: oligoarthritis (n = 40), polyarthritis (n = 25) and spondylitis (n = 35). The HLA-C locus profile of this cohort was studied by methods based on molecular biology and was compared with that of 45 patients with psoriasis vulgaris and 177 healthy blood donors from the same ethnic origin. HLA-Cw*0602 was found associated with both psoriasis (odds ratio (OR) 6.2; 95% confidence interval (CI) 3.1 to 12.5; p < 0.0001) and PsA (OR 6.2; 95% CI 3.6 to 10.8; p < 0.0001); however, this allele was equally found among the PsA subsets. HLA-Cw6-positive patients showed a longer psoriasis-arthritis latency period (p = 0.012). HLA-Cw*0701 was found under-represented in PsA in comparison with controls (OR 0.5; 95% CI 0.3 to 0.9; p = 0.04), as was HLA-Cw*0802 (OR 0.3; 95% CI 0.08 to 1; p = 0.05). A positive association was found between psoriatic spondylitis and HLA-Cw*0702 (OR 5.0; 95% CI 1.4 to 25; p = 0.01). HLA-Cw*0602 seems to confer a general risk for psoriasis, but the presence of other HLA-C locus alleles may explain an additional arthritogenic risk. HLA-C alleles may modulate some aspects of the clinical expression of PsA, but these findings need confirmation.
    Arthritis research & therapy 02/2006; 8(6):R185. DOI:10.1186/ar2097 · 3.75 Impact Factor
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