title: DNA polymorphism of HLA class II genes in systemic lupus erythematosus.
abstract: We investigated the DNA restriction fragment length polymorphism (RFLP) of the major histocompatibility complex (MHC) genes: HLA-DRB, -DQA, -DQB, -DPB in 24 Danish patients with systemic lupus erythematosus (SLE) and in 102 healthy Danes. A highly significant increase of the frequency of the DR3- and DRw6-associated 7.00 kb DRB TaqI DNA fragment was found in SLE patients compared to normal controls (83.3% vs 35.5%; RR = 9.1, p < 10(-4). The frequencies of the DQA1*0501-associated 4.56 kb DQA TaqI fragment and the DRB3*01/03-associated 9.79 kb TaqI fragment were also found to be significantly increased in SLE patients (70.8% vs 29.7%; RR = 5.8, p < 10(-2) for the DQA fragment and 70.8% vs 36.1%; RR = 4.3, p < 0.05 for the DRB3 fragment). Less extensive and insignificant increases of the frequencies of the DR3-associated DQB and DPB fragments were observed. The frequencies of the DR2-associated DRB, DQA, and DQB fragments were comparable to those found in normal controls.
authors.affiliation: Institute of Forensic Genetics, University of Copenhagen, Denmark.
authors.forename: J B
authors.initials: JB
authors.lastname: Cowland
authors.forename: V
authors.initials: V
authors.lastname: Andersen
authors.forename: P
authors.initials: P
authors.lastname: Halberg
authors.forename: N
authors.initials: N
authors.lastname: Morling
mesh_terms: D004247:DNA / Q000235:genetics*; D006682:HLA-DP Antigens / Q000235:genetics; D006683:HLA-DQ Antigens / Q000235:genetics; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000235:genetics; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000235:genetics* / Q000276:immunology*; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; C069050:HLA-DQA1 antigen; C057615:HLA-DQbeta antigen; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D004247:DNA