title: The prevalence of human leukocyte antigen (HLA) DR/DQ/DP alleles in Kuwaiti children with oligoarticular juvenile idiopathic arthritis.
abstract: We have determined the prevalence of human leukocyte antigen (HLA)-DR, DQ and DP alleles in Kuwaiti children with oligoarticular juvenile idiopathic arthritis (OA-JIA) and healthy controls using the PCR-SSP (sequence specific primers) method. The analysis took into account the presence of antinuclear antibodies and chronic anterior uveitis. DRB1*03 (RR 2.20, P<0.001), DRB1*08 (RR 5.280, P<0.026), DQA1*0501 (RR 1.930, P<0.001), DQB1*0304 (RR 7.920, P<0.002), DQB1*0501 (RR 3.080, P<0.007) and DPB1*0101 (RR 8.8, P<0.001) were the main HLA alleles associated with OA-JIA in Kuwaiti Arabs in this study. DRB1*03 was detected in 71% of children with positive ANA, and in 50% of children with anterior uveitis. DQA1 alleles *0501, *0103 and *0105 (P<0.001; 0.029 and 0.024 respectively) were found to be associated with OA-JIA. In contrast, DQA1*0301 and DQA1*0302 alleles appear to be protective in Kuwaiti children (RR 0.153, P<0.001 and RR 0.278, P<0.016 respectively). The DQB1 alleles *0304 and *0501 were associated with OA-JIA (P<0.002 and P<0.007 respectively). In the case of DPB1, only one allele (*0101) was associated with OA-JIA (P<0.001). Most Kuwaiti Arab patients with OA-JIA who carried a DQ or DP susceptibility allele also had an accompanying DRB1*03 or *8 allele.
authors.affiliation: Department of Pediatrics, Faculty of Medicine, Kuwait University, PO Box 24923, Safat, 13110, Kuwait. khaledalsaeid@hotmail.com
authors.forename: K
authors.initials: K
authors.lastname: Alsaeid
authors.forename: M Z
authors.initials: MZ
authors.lastname: Haider
authors.forename: P N
authors.initials: PN
authors.lastname: Sharma
authors.forename: E M
authors.initials: EM
authors.lastname: Ayoub
mesh_terms: D000483:Alleles; D000974:Antibodies, Antinuclear / Q000097:blood; D001171:Arthritis, Juvenile / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005838:Genotype; D006682:HLA-DP Antigens / Q000235:genetics*; D006683:HLA-DQ Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D006801:Humans; D007730:Kuwait; D008297:Male; D014606:Uveitis, Anterior / Q000150:complications
chemical_list: D000974:Antibodies, Antinuclear; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens