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Background  The HLA-A*02-B*46 haplotype is one of most frequent haplotypes among Guangdong Han populations. To explore the characteristics of the HLA-A*02-B*46 haplotype in Guangdong Han populations, the genetic polymorphism of HLA-A*02-B*46 haplotype was analysed by PCR-SBT in our study.    Findings  Among 88 samples with the homozygotes for HLA-A*02-B*46 in the low resolution, 4 different alleles for A*02 (A*0201, A*0203, A*0206, A*0207) and 1 allele for B*46 (B*4601) were identified by PCR-SBT. Among them, the A*0207 allele was the predominant allele. Inversely, among the samples with HLA-A*2-B*46(-), six alleles were detected for A*02 (A*020101, A*0203, A*0205, A*0206 and A*0207), and the A*0201 allele was predominant. On the other hand, the HLA-A*02-B*46 haplotype presented moderate heterozygosis (32.95%). In addition, the linkage with DRB1 was analysed in HLA-A*2-B*46 haplotype, and there existed 10 alleles with DRB1. With the low resolution for DRB1, the other 10 DRB1 alleles all linked with the HLA-A*02-B*46 haplotype except for DRB1*01, DRB1*10, and DRB1*17. Moreover, we found eight alleles of DRB1 in the HLA-A*0207-B*4601 haplotype.    Conclusion  The polymorphism distribution of the A*02 allele between the HLA-A*02-B*46 and HLA-A*02-B*46(-) haplotypes among the Guangdong Han populations provides useful information for research on unrelated hematopoietic stem cell transplantation (UHSCT), anthropology, and disease association for populations with the HLA-A*02-B*46 haplotype.

Identification of HLA-A*02-B*46 haplotype allele variant in Guangdong Han populations on the basis of PCR-SBT

Identification of HLA-A02-B46 haplotype allele variant in Guangdong Han populations on the basis of PCR-SBT