title: HLA-DQA1 and -DQB1 genotyping by PCR-RFLP, heteroduplex and homoduplex analysis.
abstract: PCR-RFLP typing methods for DQA1 and DQB1 in conjunction with the analysis of heteroduplex and homoduplex patterns have allowed a simple method for typing all of the major DQA1 and DQB1 alleles. This method has advantages over PCR amplification with sequence-specific primers (PCR-SSP), PCR hybridization with sequence-specific oligonucleotide probes (PCR-SSO) and other PCR-RFLP strategies for typing DQ alleles. The analysis of heteroduplex and homoduplex patterns can be used in conjunction with other PCR typing systems such as PCR-SSP as a confirmatory step with little additional work. In addition, a PCR-RFLP strategy was designed for resolving the DQB1*0602 and DQB1*0603 alleles, which involved the use of a primer containing a base mutation, creating a new restriction site which distinguished the two alleles. These techniques have enabled resolution of the major homozygous and heterozygous combinations of these DQA1 and DQB1 alleles. The PCR-RFLP technique does not require the large number of oligonucleotides that are necessary for both the PCR-SSP and PCR-SSO techniques and is thus both time and cost effective for infrequent or small numbers of samples.
authors.affiliation: Department of Immunology, Westmead Hospital, Sydney, NSW, Australia.
authors.forename: S M
authors.initials: SM
authors.lastname: Teutsch
authors.forename: B H
authors.initials: BH
authors.lastname: Bennetts
authors.forename: M
authors.initials: M
authors.lastname: Castle
authors.forename: M
authors.initials: M
authors.lastname: Hibbins
authors.forename: R N
authors.initials: RN
authors.lastname: Heard
authors.forename: G J
authors.initials: GJ
authors.lastname: Stewart
mesh_terms: D000483:Alleles; D001483:Base Sequence; D002460:Cell Line; D002461:Cell Line, Transformed; D017931:DNA Primers; D005838:Genotype; D006683:HLA-DQ Antigens / Q000235:genetics*; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; D006801:Humans; D008969:Molecular Sequence Data; D009103:Multiple Sclerosis / Q000097:blood / Q000235:genetics / Q000276:immunology; D009692:Nucleic Acid Heteroduplexes; D016133:Polymerase Chain Reaction / Q000379:methods*; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D017931:DNA Primers; D006683:HLA-DQ Antigens; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; C069050:HLA-DQA1 antigen; C069051:HLA-DQB1 antigen; D009692:Nucleic Acid Heteroduplexes