title: Genetic polymorphisms at HLA-A, -B, and -DRB1 loci in Han population of Xi'an city in China.
abstract: OBJECTIVE
  To determine genetic polymorphisms at human leukocyte antigen (HLA)-A, -B, and -DRB1 loci in Han population of Xi'an city in China.
  
  
  METHODS
  Polymerase chain reaction-based reverse line-strip sequence specific oligonucleotide hybridization was used to determine the alleles of HLA-A, -B, and -DRB1 in 516 unrelated, healthy individuals of Han population in Xi'an. Allele frequencies at HLA-A, -B, and -DRB1 loci were estimated by direct counting method. Haplotype frequencies were calculated from genotype data by expectation maximization.
  
  
  RESULTS
  A total of 14 alleles of HLA-A, 33 alleles of HLA-B, and 13 alleles of HLA-DRB1 were found. The most common alleles were HLA-A*02 (28.39%), A*11 (19.19%), and A*24 (16.28%); HLA-B*13 (11.05%), B*15 (B62: 9.30%), and B*51 (8.53%); and HLA-DRB1*15 (17.15%), DRB1*09 (13.18%), and DRB1*04 (10.85%). The most common haplotypes of HLA-A-B-DRB1 haplotype were HLA-A*30-B*13-DRB1*07 (3.93%), HLA-A*02-B*46-DRB1*09 (3.20%), and HLA-A*33-B*58-DRB1*17 (1.63%).
  
  
  CONCLUSIONS
  The finding that the HLA loci are highly polymorphic in Han population of Xi'an City may be useful for population genetics, HLA-related studies, human identification, and paternity tests in forensic sciences.
authors: Department of Forensic Medicine, School of Medicine, Xi'an Jiaotong University, Xi'an, 710061 Shaanxi, P. R. China.
authors: Chunmei
authors: C
authors: Shen
authors: Bofeng
authors: B
authors: Zhu
authors: Mengli
authors: M
authors: Liu
authors: Shengbin
authors: S
authors: Li
mesh_terms: D002681:China; D005006:Ethnicity; D005828:Genetics, Population; D005838:Genotype; D015234:HLA-A Antigens / Q000235:genetics*; D015235:HLA-B Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006801:Humans; D010865:Pilot Projects; D011110:Polymorphism, Genetic / Q000235:genetics*
chemical_list: D015234:HLA-A Antigens; D015235:HLA-B Antigens; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains