title: [Distribution of HLA-DR antigens in unrelated giant cell arteritis].
abstract: HLA-DR antigen distribution was determined by lymphotoxicity on total lymphocytes for locus A.B.C. antigens numbering 14,28 and 7 respectively, and by a search on B lymphocytes for the 12 antigens of locus DR. The normal population included 124 subjects typed for HLA-A.B.C. and 200 subjects typed for HLA-DR. The frequency of alleles was compared to that of the different groups of patients. Significant variations were evaluated by the X2 test, using Woolf's method; the P value obtained was multiplied by the number of antigens looked for (P corrected, or pc). No deviation in frequency was found with the HLA-A.B.C. antigens. Only the DR 4 antigen, present in 23% of the normal population, was increased in proportions that depended on clinical classification: 39.4% (Pc = 0.05) in all patients with giant cell arteritis: 27% (NS) in the 37 polymyalgia rheumatica patients with negative biopsy of the temporal artery; 46.8% (P 0.05) in the 62 patients with Horton's disease presenting either as clinical and histological temporal arteritis (26 cases; DR 4 = 38.5%; NS), or as clinical and/or histological temporal arteritis associated with polymyalgia rheumatica (36 cases; DR 4 = 52.8%; Pc less than 0.005). The frequency of DR 4 antigen in Horton's disease with typical temporal artery biopsy (37 cases) was 46% (Pc = 0.05).
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D005260:Female; D013700:Giant Cell Arteritis / Q000235:genetics*; D006680:HLA Antigens / Q000032:analysis; D006681:HLA-D Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000032:analysis / Q000235:genetics*; D015804:HLA-DR4 Antigen; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D011111:Polymyalgia Rheumatica / Q000235:genetics*
chemical_list: D006680:HLA Antigens; D006681:HLA-D Antigens; D006684:HLA-DR Antigens; D015804:HLA-DR4 Antigen
vernacular_title: Groupage HLA DR dans les artérites à cellules géantes non apparentées.