title: [Association between asthma and the polymorphism of HLA-DQ genes].
abstract: OBJECTIVE
  To investigate association between asthma and HLA-DQ genes in Chinese asthma family.
  
  
  METHODS
  HLA genotyping was done for HLA-DQ using polymerase chain reaction-sequence specific primers (PCR-SSP) in 98 members of 32 Chinese asthma families and 67 normal controls.
  
  
  RESULTS
  The allele frequencies of DQA1 * 0101 and DQA1 * 0601 in asthmatics (40.0% and 45.0% respectively) were significantly higher than those in normal controls (16.4% and 13.4% respectively; chi(2) = 6.1860, P < 0.05, RR = 3.39 and chi(2) = 11.609 0, P < 0.01, RR = 5.27 respectively). The allele frequencies of DQB1 * 0303 and DQB1 * 0601 in asthmatics (55.0% and 47.5% respectively) were also significantly higher than those in normal controls (13.7% and 13.7% respectively; chi(2) = 15.740 0, P < 0.01, RR = 7.68 and chi(2) = 10.930 0, P < 0.01, RR = 5.69 respectively). The allele frequency of DQ * 0201 (39.4%) was significantly higher in members with positive specific IgE response to dermatophagoides than that in non-atopy members (12.0%) in asthma family (t = 2.382 5, P < 0.05).
  
  
  CONCLUSIONS
  HLA-DQA1* 0101, DQA1 * 0601 and HLA-DQB1 * 0303, DQB1 * 0601 may be the susceptible alleles of asthma. HLA-DQB1 * 0201 allele may limit the specific IgE response to dermatophagoides.
authors.affiliation: Department of Respiratory Medicine, Ruijin Hospital, Shanghai Second Medical University, Shanghai 200025, China.
authors.forename: X
authors.initials: X
authors.lastname: Guo
authors.forename: P
authors.initials: P
authors.lastname: Ni
authors.forename: L
authors.initials: L
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000235:genetics*; D002648:Child; D002675:Child, Preschool; D004247:DNA / Q000235:genetics; D005192:Family Health; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006683:HLA-DQ Antigens / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic
chemical_list: D006683:HLA-DQ Antigens; D004247:DNA