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  • Title: Dw subtypes of DR4 in rheumatoid arthritis: evidence for a preferential association with Dw4.
    Author: Zoschke D, Segall M.
    Journal: Hum Immunol; 1986 Jan; 15(1):118-24. PubMed ID: 2419283.
    Abstract:
    We have determined the frequency of the DR4-associated Dw subtypes, defined by homozygous typing cells, in a group of rheumatoid arthritis (RA) patients on second-line drug therapy. The frequency of DR4 in these patients was 86%. Among Caucasians, the frequency of Dw4 in the DR4-positive patients was significantly increased (68%) as compared to DR4-positive normal individuals (46%; p less than 0.025). Dw4, as compared to the other DR4 subtypes tested, may also be associated with more severe disease as judged by indices of functional impairment and joint damage. In a small subgroup of non-Caucasian (black and Native American) patients, the Dw13 (DB3) subtype of DR4 was often seen, suggesting that RA may have different Dw associations in different ethnic groups.
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