title: HLA-DR4 in Negro and Mexican rheumatoid arthritis patients.
abstract: We tested HLA-DR antigens in 38 Caucasian, 18 Negro, 17 Mexican, and 5 Japanese patients with rheumatoid arthritis. Significantly high HLA-DR4 frequencies were observed in all races; 61% in Caucasians, 39% in Negroes, 77% in Mexicans, and 100% in Japanese. However, no clinical correlation with DR4 was found in these patients.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D044383:Black People; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D015804:HLA-DR4 Antigen; D006630:Hispanic or Latino; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D008297:Male; D008800:Mexico / Q000208:ethnology; D044465:White People
chemical_list: D006680:HLA Antigens; D015804:HLA-DR4 Antigen; D000949:Histocompatibility Antigens Class II