title: Molecular typing of HLA-B27 alleles.
abstract: HLA-B27 represents a family of closely related antigens. Six alleles which differ in a limited number of nucleotide substitutions have been described (B*2701--B*2706). These changes are clustered in alpha 1 and alpha 2 domains. Polymerase chain reaction strategies were designed to amplify specific regions of class I exons 2 and 3. Amplified sequences were tested with eight sequence-specific oligonucleotides to distinguish all B27 subtypes. We also subtyped B27 in 50 healthy Spanish individuals using this procedure. The B*2705 subtype is over-represented in our population (96%). The remaining 4% carried the B*2702 allele. This finding is in agreement with the frequencies described by other techniques (cytotoxic T lymphocytes and isoelectric-focusing) for Caucasian populations. Class I oligotyping is a poorly developed field with significant potential applications. This procedure of genotyping B27 alleles is a reliable method which can be used in transplantation and B27-associated disease studies.
authors.affiliation: Immunologia, Hospital Central, Oviedo, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Dominguez
authors.forename: E
authors.initials: E
authors.lastname: Coto
authors.forename: E
authors.initials: E
authors.lastname: Martinez-Naves
authors.forename: S Y
authors.initials: SY
authors.lastname: Choo
authors.forename: C
authors.initials: C
authors.lastname: López-Larrea
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D002460:Cell Line; D005091:Exons / Q000235:genetics; D005838:Genotype; D015796:HLA-B27 Antigen / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D015345:Oligonucleotide Probes; D016133:Polymerase Chain Reaction / Q000379:methods
chemical_list: D015796:HLA-B27 Antigen; D015345:Oligonucleotide Probes