title: Sequence-based association analysis of HLA class I and II alleles in Japanese supports conservation of common haplotypes.
abstract: Alleles of HLA-A, B, C, DRB1, DQB1, and DPB1 loci were fully determined in 117 healthy Japanese. A*2402, A*3303, A*1101, A*0201, B*4403, B*5201, Cw*0102, Cw*1403, Cw*0304, Cw*0702, Cw*0801, and Cw*1202 showed frequencies of over 10%. Multi-locus haplotype frequencies were estimated by the maximum likelihood method. Strength of association between C and B loci was comparable with that between DRB1 and DQB1 loci. Alleles unidentified by a serological method and having very similar nucleotide sequences (A2: A*0201, A*0206, A*0207, B61: B*4002, B*4006) were carried by different haplotypes. Several frequent five-locus haplotypes were identified including A*3303-Cw*1403-B*4403-DRB1(*)1302-DQB1(*)0604, and A*2402-Cw*1202-B*5201-DRB1(*)1502-DQB1(*)0601. These sequence-based haplotypes corresponded to serology-based common haplotypes which have already been described in Japanese. These findings indicate that common HLA haplotypes consist of particular sets of HLA alleles and that these haplotypes have been conserved through recent human evolution.
authors.affiliation: Department of Human Genetics, Graduate School of International Health, University of Tokyo, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Y
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: A
authors.initials: A
authors.lastname: Ogawa
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Mitsunaga
authors.forename: S
authors.initials: S
authors.lastname: Moriyama
authors.forename: L
authors.initials: L
authors.lastname: Lin
authors.forename: M
authors.initials: M
authors.lastname: Bannai
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: K
authors.initials: K
authors.lastname: Kashiwase
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Akaza
authors.forename: K
authors.initials: K
authors.lastname: Tadokoro
authors.forename: T
authors.initials: T
authors.lastname: Juji
mesh_terms: D000483:Alleles; D005787:Gene Frequency; D005805:Genes, MHC Class I; D005802:Genes, MHC Class II; D006681:HLA-D Antigens / Q000235:genetics*; D006239:Haplotypes; D015395:Histocompatibility Antigens Class I / Q000235:genetics*; D006801:Humans; D007564:Japan
chemical_list: D006681:HLA-D Antigens; D015395:Histocompatibility Antigens Class I