Abstract：
:Rheumatoid arthritis is associated with HLA-DR4 in several ethnic groups. Since DR4 haplotypes encode a diverse array of class II molecules, it is of interest to characterize the nature of the primary association. We have examined molecular polymorphisms of HLA class II gene products expressed by normals and rheumatoid arthritis patients using monoclonal antibodies and two-dimensional electrophoresis. Most homozygous DR4 rheumatoid arthritis patients express DR beta 1 molecules associated with Dw4 or Dw14 mixed lymphocyte culture determinants. In Caucasoids, two DR4-linked DQw3-associated beta-chain alleles are defined by two-dimensional electrophoresis. These variants, designated DQ beta 3.1 and 3.2, are associated with the serologic determinants DQw7 and DQw8, respectively. A panel of 40 DR4-positive normals was also examined for nucleotide sequence polymorphisms associated with DQB3.1 and 3.2 genes using the polymerase chain reaction and specific oligonucleotide probes. At the DQ beta level the rheumatoid arthritis panel was distinguished by enrichment for the DQ beta 3.1 allele with 100% of patients positive for DQw7. Results presented here suggest that specific DQ beta alleles may modify the effect of HLA-DR4 beta 1 alleles in conferring susceptibility to rheumatoid arthritis in a phenotype-specific fashion.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Lanchbury JS,Sakkas LI,Marsh SG,Bodmer JG,Welsh KI,Panayi GSdoi
10.1016/0198-8859(89)90033-5subject
Has Abstractpub_date
1989-09-01 00:00:00pages
59-71issue
1eissn
0198-8859issn
1879-1166pii
0198-8859(89)90033-5journal_volume
26pub_type
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