Association and frequency of HLA-A, B and HLA-DR genes in south Tunisian patients with spondyloarthritis (SpA)
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Nadia Mahfoudh & Mariam Siala & Markus Rihl & Arwa Kammoun & Faten Frikha & Hela Fourati & Mohamed Younes & Radhouane Gdoura & Lilia Gaddour & Faiza H
- چاپ و سال / کشور: 2011
Description
The aim of this study is to investigate the association of HLA-A, B and HLA-DR gene expression and to assess an association of additional HLA antigens besides HLA-B27 in south Tunisian patients with spondyloarthritis (SpA). Eighty-five patients diagnosed with ankylosing spondylitis (AS, n=68) and reactive arthrithis (ReA, n=17) were selected and compared with 100 healthy controls (HC). HLA class I antigens were typed serologically using microlymphocytotoxicity technique. HLADRB1* alleles were studied by polymerase chain reaction amplification with sequence-specific primers. The significance of differences between patients and controls was tested by chi-square analysis. We found significantly increased frequencies of HLA-A3 (30.6%; pC=0.04; OR=2.95), HLA-B27 (62.35%; pC=4.10-17, OR=53.55), and HLA-DRB1*15 (17.2%; pC=0.026; RR=2.58) alleles in SpA patients compared to HC. The most frequent and strongest association was observed for HLA-B27 in AS (pC=6.6×10-16, OR=52.23). When AS and ReA patients were analysed separately, HLA-DRB1*15 and HLA-A3 were increased only in AS (pC=0.01, OR=2.99 and pC= 0.03, OR=3.14, respectively). In ReA patients, HLADRB1* 04 (p=0.033, pC=NS, OR=2.89) was found to be the most common allele. By analysing the HLA-B27- negative subgroup, HLA-A3 and HLA-DRB1*15 expression was found to be dependent on the presence of HLA B27. HLA-B27 expression was higher in male (45/53; 85%) as compared to female (8/53; 15%) patients (p=0.03). Apart from HLA-B27, HLA-A3 and HLA-DRB1*15 are the MHC class I and II alleles found most frequent in Tunisian patients with AS, whereas HLA-DRB1*04 was found most frequent in ReA patients. HLA-B27 is more frequent in male than in female patients.
Clin Rheumatol (2011) 30:1069–1073 Received: 23 June 2010 / Revised: 16 December 2010 / Accepted: 28 January 2011 / Published online: 1 March 2011
