title: [Ankylosing spondylitis and heterogenity of HLA-B27 in Chinese].
abstract: HLA-B27 represents a family of closely related antigens. More than six alleles differing in limited number of nucleotide substitution had been described (B2701-B2706). We subtyped HLA-B27 in 76 patients with ankylosing spondylitis (AS) and 1200 Chinese healthy persons of Han nationality. Polymerase chain reaction was designed to amplify specific regions for class I (exon 2 and 3). Amplified sequences were tested with eight sequence-specific oligonucleotides to distinguish all HLA-B27 subtypes. The results showed: the HLA-B27 was closely related with AS and at least four subtypes existed in Chinese patients. B2704 was the most common subtype occurring in 54.8% and 50.85% respectively in HLA-B27 positive AS patients and healthy controls. The main HLA-B27 subtypes in the HLA-B27 positive patients distributed in similar proportion to that of HLA-B27 positive healthy controls (P > 0.1). We believe that the above results imply that the prevalences of the various subtypes of HLA-B27 vary in different races. The HLA-B27 specific residues that are shared by the subtypes might be involved in the pathogenesis of AS.
authors.affiliation: Arthritts Clinic & Research Center, People's Hospital, Beijing Medical University.
authors.forename: J
authors.initials: J
authors.lastname: Lin
authors.forename: H
authors.initials: H
authors.lastname: Lu
authors.forename: C
authors.initials: C
authors.lastname: Feng
mesh_terms: D000483:Alleles; D002681:China; D018740:Genetic Heterogeneity; D015796:HLA-B27 Antigen / Q000097:blood* / Q000145:classification / Q000235:genetics; D006801:Humans; D013045:Species Specificity; D013167:Spondylitis, Ankylosing / Q000276:immunology*
chemical_list: D015796:HLA-B27 Antigen