title: Association of HLA-Aw31 and HLA-DR1 with adult rheumatoid arthritis.
abstract: Forty-nine Israeli Jewish patients with rheumatoid arthritis (RA) were studied for their HLA A, B, C, DR antigen frequency. A significant increase in HLA Aw31 and HLA DR1 was observed (p less than 5.10(-5) and p less than 5.10(-3) respectively). 45% of Aw31 positive patients were sero-negative for rheumatoid factor, while most HLA DR1 positive individuals were seropositive. DR5 was found to be significantly decreased (p less than 5.10(-4)). Contrary to previous reports, DRw4 was found to be within the range of antigen frequency of the controls (34.7% vs. 32%). It is suggested that in our population of patients Aw31 and DR1 and not DR4 are highly associated with adult onset of RA.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005260:Female; D006680:HLA Antigens / Q000032:analysis*; D015234:HLA-A Antigens; D015798:HLA-DR1 Antigen; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D006680:HLA Antigens; D015234:HLA-A Antigens; C069527:HLA-A31 antigen; D015798:HLA-DR1 Antigen; D000949:Histocompatibility Antigens Class II