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, 36 (4), 465-72

HLA Class II Alleles and Heterogeneity of Juvenile Rheumatoid Arthritis. DRB1*0101 May Define a Novel Subset of the Disease

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HLA Class II Alleles and Heterogeneity of Juvenile Rheumatoid Arthritis. DRB1*0101 May Define a Novel Subset of the Disease

R Ploski et al. Arthritis Rheum.

Abstract

Objective: To examine the distribution of HLA class II alleles in clinically distinct juvenile rheumatoid arthritis (JRA) subsets.

Methods: We typed 298 patients and 181 controls for HLA-DRB1, DQA1, DQB1, and DPB1 alleles using polymerase chain reaction and oligonucleotide probe techniques.

Results: Each JRA subset was characterized by a distinct distribution of HLA class II alleles. For the persistently pauciarticular and rheumatoid factor-negative polyarticular JRA subsets, certain combinations of DRB1 and DPB1 alleles were characteristic. In patients without antinuclear antibodies and chronic iridocyclitis, there was an increase of DRB1*0101/02 and DQA1*0101.

Conclusion: Findings of HLA typing support clinical subdivisions of the disease and suggest the existence of a novel DRB1*0101/02 and DQA1*0101 associated disease subset.

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