title: HLA-DR4 subtype and -B alleles in DQB1*0302-positive haplotypes associated with IDDM. The Childhood Diabetes in Finland Study Group.
abstract: We determined the distribution of DR4 subtypes in 309 DQB1*0302-positive haplotypes found in insulin-dependent diabetes mellitus (IDDM) patients and 70 control haplotypes present only in healthy family members. An increased frequency of DRB1*0401 allele (74.4% vs. 55.7%, P = 0.003) and a decrease of DRB1*0404 allele (23.6% vs. 40.0%, P = 0.0064) was revealed. A further analysis of extended haplotypes demonstrated strong linkages between various B alleles and DRB1*04 subtypes. HLA-B39 was more frequent in DRB1*0404-DQB1*0302-positive IDDM haplotypes compared with control ones (37.0% vs. 14.3%, P = 0.049), suggesting an involvement of the region telomeric to HLA-DRB1 in the susceptibility to IDDM.
authors.affiliation: Turku Immunology Centre, University of Turku, Finland.
authors.forename: H
authors.initials: H
authors.lastname: Reijonen
authors.forename: S
authors.initials: S
authors.lastname: Nejentsev
authors.forename: J
authors.initials: J
authors.lastname: Tuokko
authors.forename: S
authors.initials: S
authors.lastname: Koskinen
authors.forename: E
authors.initials: E
authors.lastname: Tuomilehto-Wolf
authors.forename: H K
authors.initials: HK
authors.lastname: Akerblom
authors.forename: J
authors.initials: J
authors.lastname: Ilonen
mesh_terms: D000293:Adolescent; D000483:Alleles; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000453:epidemiology / Q000235:genetics* / Q000276:immunology; D004198:Disease Susceptibility; D005387:Finland / Q000453:epidemiology; D005787:Gene Frequency; D008040:Genetic Linkage; D015235:HLA-B Antigens / Q000032:analysis / Q000235:genetics*; D006683:HLA-DQ Antigens / Q000235:genetics; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000032:analysis / Q000235:genetics*; D015804:HLA-DR4 Antigen / Q000032:analysis / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D012307:Risk Factors
chemical_list: D015235:HLA-B Antigens; D006683:HLA-DQ Antigens; D059866:HLA-DQ beta-Chains; C069051:HLA-DQB1 antigen; D006684:HLA-DR Antigens; D015804:HLA-DR4 Antigen; D059811:HLA-DRB1 Chains; C553505:HLA-DRB1*04:01 antigen