title: HLA-DQ and TAP2 genes in patients with insulin-dependent diabetes mellitus.
abstract: We examined the prevalence of HLA-DRB1, DQB1, DQA1 and TAP2 genes in children with insulin-dependent diabetes mellitus (type 1 diabetes). These HLA and TAP2 alleles were identified by dot-blot analysis of polymerase chain reaction (PCR)-amplified genomic DNA with sequence-specific oligonucleotide probes. The results show that those DQB1 alleles, which carry non-aspartic acid at position 57, in conjunction with DQA1 alleles carrying arginine at position 52, are strongly associated with susceptibility to type 1 diabetes. The prevalence of the TAP2* 0201 allele in diabetic patients was significantly lower than that in normal controls. Analysis of the data suggests that DQ alleles have the primary association with type 1 diabetes and that the association of TAP2 alleles with the disease is secondary.
authors.affiliation: Department of Pathology, McMaster University, Hamilton, Ontario, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Lotfi
authors.forename: A
authors.initials: A
authors.lastname: Sastry
authors.forename: M
authors.initials: M
authors.lastname: Ye
authors.forename: J
authors.initials: J
authors.lastname: VanderMeulen
authors.forename: H M
authors.initials: HM
authors.lastname: Dosch
authors.forename: D P
authors.initials: DP
authors.lastname: Singal
mesh_terms: D000071450:ATP Binding Cassette Transporter, Subfamily B, Member 3; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D001483:Base Sequence; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics* / Q000276:immunology; D006683:HLA-DQ Antigens / Q000235:genetics*; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006801:Humans; D008969:Molecular Sequence Data
chemical_list: D000071450:ATP Binding Cassette Transporter, Subfamily B, Member 3; D018528:ATP-Binding Cassette Transporters; D006683:HLA-DQ Antigens; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; C069050:HLA-DQA1 antigen; C069051:HLA-DQB1 antigen; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; C071692:TAP2 protein, human