title: [HLA-DRB1 allelic polymorphism in children with juvenile idiopathic arthritis].
abstract: OBJECTIVE
  To investigate the predisposing alleles of HLA-DRB1 genes in Han children with juvenile idiopathic arthritis (JIA) from Guangdong Province, China.
  
  
  METHODS
  Polymerase chain reaction-specific sequence primers (PCR-SSP) method was used to type HLA-DRB1 subregions in 94 Han children with JIA and 226 Han healthy controls.
  
  
  RESULTS
  The frequency of HLA-DRB1*08 allele in the JIA group was significantly higher than that in the control group (P=0.0014, OR=2.26), in contrast, the frequency of HLA-DRB1*12 allele was significantly lower than that in the control group (P=0.032, OR=0.55). It was found that in children with So-JIA subset (P=0.023, OR=2.25) and polyarthritis JIA subset (P=0.034, OR=2.81), the allele HLA-DRB1*08 was expressed most commonly. The allele HLA-DRB1*15 was expressed in a lower frequency in children with So-JIA subset (P=0.049, OR=0.413) and oligoarthritis subset (P=0.045, OR=0.16) compared with that in the control group.
  
  
  CONCLUSIONS
  HLA-DRB1*08 may be the susceptible allele of JIA, while HLA-DRB1*12 may be the protective allele of JIA in Han children from Guangdong Province. HLA-DRB1*08 is the susceptible allele of So-JIA and polyarthrits. HLA-DRB1*15 is the protective allele for systemic JIA and oligoarthritis.
authors.affiliation: Department of Allergy, Guangzhou Children's Hospital/Guangzhou Women and Children's Medical Center, Guangzhou, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Wu
authors.forename: Hua-Song
authors.initials: HS
authors.lastname: Zeng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000483:Alleles; D001171:Arthritis, Juvenile / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D055815:Young Adult
chemical_list: D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains