title: Influence of HLA-DRB1 gene variation on the clinical course of Vogt-Koyanagi-Harada disease.
abstract: OBJECTIVE
  To investigate the difference, if any, in the immunogenetic backgrounds between two clinical subtypes of Vogt-Koyanagi-Harada disease (VKH).
  
  
  METHODS
  HLA-DR4 gene variations were investigated in 46 Japanese patients, 28 with the prolonged type and 18 with the nonprolonged type of VKH. HLA-DR4 genes were amplified with polymerase chain reaction (PCR) and then analyzed for its variation with single-strand conformation polymorphism (SSCP) and restriction fragment length polymorphism (RFLP) methods.
  
  
  RESULTS
  Significant differences were found in the DR4 gene variation in the two clinical subtypes. All the patients with the prolonged type had either the DRB1*0405 or DRB1*0410 variant, whereas 39% of the patients with the nonprolonged type had neither of them. This difference in frequency was statistically highly significant (P = 0.00059, Pc = 0.0041). DRB1*0405 was also more frequent in the prolonged type (93%) than in the nonprolonged type (56%) (P = 0.0044, Pc " 0.030). In the prolonged type, relative risk was highest for DRB1*0405/0410 (128), whereas in the nonprolonged type it was highest for DR4 (8.6).
  
  
  CONCLUSIONS
  This preliminary study showed that DR4 gene variants differed significantly between the two subtypes of VKH, suggesting that the clinical course of VKH is determined partly by the patient's HLA-DR gene variation.
authors.affiliation: Department of Ophthalmology, University of Tokyo School of Medicine, Japan.
authors.forename: S M
authors.initials: SM
authors.lastname: Islam
authors.forename: J
authors.initials: J
authors.lastname: Numaga
authors.forename: K
authors.initials: K
authors.lastname: Matsuki
authors.forename: Y
authors.initials: Y
authors.lastname: Fujino
authors.forename: H
authors.initials: H
authors.lastname: Maeda
authors.forename: K
authors.initials: K
authors.lastname: Masuda
mesh_terms: D001483:Base Sequence; D017931:DNA Primers; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D005787:Gene Frequency; D005802:Genes, MHC Class II / Q000235:genetics*; D014644:Genetic Variation; D006684:HLA-DR Antigens / Q000235:genetics*; D015804:HLA-DR4 Antigen / Q000235:genetics; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D011897:Random Allocation; D014607:Uveomeningoencephalitic Syndrome / Q000235:genetics*
chemical_list: D017931:DNA Primers; D006684:HLA-DR Antigens; D015804:HLA-DR4 Antigen; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II