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  • Title: DPB1 polymorphism in rheumatoid arthritis: evidence of an association with allele DPB1 0401.
    Author: Perdriger A, Semana G, Quillivic F, Chalès G, Chardevel F, Legrand E, Meadeb J, Fauchet R, Pawlotsky Y.
    Journal: Tissue Antigens; 1992 Jan; 39(1):14-8. PubMed ID: 1542871.
    Abstract:
    HLA-DP polymorphism was examined in 71 rheumatoid arthritis patients and 148 controls, using dot-blot analysis with 14 synthetic oligonucleotide probes specific for the variable region of the DPB1 second exon. The DPB1 0401 allele was found to be significantly more frequent in RA patients than in controls (77.46% vs 55.40%, p less than 0.002, pc less than 0.03, relative risk value: 2.74). An association between DPB1 0401 and seropositivity for rhumatoid factors was also observed: 44 of the 55 seropositive RA patients were DPB1 0401 (p less than 0.001). Analyzing the HLA DPB1 alleles frequencies in 57 HLA-DR-typed RA patients did not show any linkage between the DPB1 0401 and the DR4 specificities. Furthermore, the DPB1 0401 homozygous frequency was increased in DR4-negative RA patients. Our findings suggest an independent role of the DPB1 0401 allele in the genetic susceptibility to RA.
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