title: Absence of an association between HLA-DRB1*04 and rheumatoid arthritis in newly diagnosed cases from the community.
abstract: OBJECTIVE
  To determine HLA-DR4 and DR1 allele frequencies in a series of patients with newly diagnosed early inflammatory arthritis.
  
  
  METHODS
  HLA-DR1 and DR4 frequencies were determined by oligonucleotide typing of 208 patients classified as having either rheumatoid arthritis (RA) or undifferentiated inflammatory polyarthritis.
  
  
  RESULTS
  The frequency of occurrence of DR4 in these patients with RA did not differ significantly from that in controls in the United Kingdom (42 v 37%). HLA-DR1 was increased in the group with inflammatory polyarthritis (25 v 18%).
  
  
  CONCLUSIONS
  The frequency of DR4 is not increased in newly diagnosed community based patients with RA. This supports the hypothesis that DR4 is less important as a marker for susceptibility to RA than it is for disease persistence or severity.
authors.affiliation: ARC Epidemiology Research Unit, Manchester Medical School, United Kingdom.
authors.forename: W
authors.initials: W
authors.lastname: Thomson
authors.forename: L
authors.initials: L
authors.lastname: Pepper
authors.forename: A
authors.initials: A
authors.lastname: Payton
authors.forename: D
authors.initials: D
authors.lastname: Carthy
authors.forename: D
authors.initials: D
authors.lastname: Scott
authors.forename: W
authors.initials: W
authors.lastname: Ollier
authors.forename: A
authors.initials: A
authors.lastname: Silman
authors.forename: D
authors.initials: D
authors.lastname: Symmons
mesh_terms: D001172:Arthritis, Rheumatoid / Q000235:genetics*; D001483:Base Sequence; D005802:Genes, MHC Class II / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D015798:HLA-DR1 Antigen / Q000235:genetics; D015804:HLA-DR4 Antigen / Q000235:genetics; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D016017:Odds Ratio; D015345:Oligonucleotide Probes; D016133:Polymerase Chain Reaction; D013997:Time Factors
chemical_list: D006684:HLA-DR Antigens; D015798:HLA-DR1 Antigen; D015804:HLA-DR4 Antigen; D059811:HLA-DRB1 Chains; D000949:Histocompatibility Antigens Class II; D015345:Oligonucleotide Probes