Abstract
Many reports have described HLA-DRB1 genes as having an influence on disease severity and susceptibility in rheumatoid arthritis (RA). Studies were undertaken to define the effect of RA-associated alleles on disease severity in Korean patients with seropositive RA. The results indicate that the most common RA susceptibility allele, HLA-DRB1*0405, is significantly associated with bony erosion, joint deformity and extra-articular manifestations. However, RA-associated alleles in Koreans have less effect on nodular disease than in Caucasians. This suggests that the presence of RA-associated alleles, especially HLA-DRB1*0405, seems to be a prognostic marker for severe erosive disease in Koreans.
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