title: Unique associations between HLA-B and HLA-DRB1*04 gene variants in Japanese.
abstract: HLA-DRB1*04 gene variants were determined in apparently healthy Japanese with PCR-SSCP and PCR-RFLP, and HLA-B-DRB1*04 haplotype frequencies were estimated statistically. DRB1*0405, which consisted of 60% of the Japanese DRB1*04 gene pool, was associated strongly with HLA-B54. This association was observed only for DRB1*0405, and not for any other DR4 variants. DRB1*0403 and DRB1*0406, which share the same peptide sequence except for amino acid 37, were both associated with B35 and B62. DRB1*0407 was associated exclusively with B35. DRB1*0410 was associated with B60 and B61. B60 and B61, on the other hand, were associated only with DRB1*0410 and DRB1*0405. B35 was associated with all DR4 microvariants. With this possible exception, our calculation suggests that unique B-DR associations were present even for DR4 microvariants. The knowledge of HLA-B and DRB1*04 associations would be useful in clinical settings.
authors.affiliation: BML General Laboratory, Saitama, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nishimoto
authors.forename: K
authors.initials: K
authors.lastname: Matsuki
authors.forename: S M
authors.initials: SM
authors.lastname: Islam
authors.forename: R
authors.initials: R
authors.lastname: Hirata
authors.forename: H
authors.initials: H
authors.lastname: Maeda
mesh_terms: D044466:Asian People / Q000235:genetics*; D001483:Base Sequence; D004247:DNA / Q000235:genetics; D014644:Genetic Variation / Q000235:genetics*; D015235:HLA-B Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D007564:Japan; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D015235:HLA-B Antigens; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II; D004247:DNA