The British Journal of Rheumatology, Vol 36, 630-636, Copyright © 1997 by British Society for Rheumatology
S Wakitani, N Murata, Y Toda, R Ogawa, T Kaneshige, Y Nishimura and T Ochi
To assess the association between HLA-DRB1 and the pathogenesis of
rheumatoid arthritis (RA) in the Japanese population, we typed for HLA-
DRB1 alleles in 852 Japanese patients. An analysis of HLA-DRB1 allele
associations was performed on the overall group and in three disease
subsets of adult-onset RA, classified according to the extent of joint
destruction evident on plain radiograms, i.e. least erosive subset (LES),
more erosive subset (MES) and most erosive subset with mutilating disease
(MUD). The Japanese RA patients with positively associated with DRB1*0101
and *0405, and negatively associated with DRB1*0701, *0802, *1302 and
*1405. DRB1*0101 was associated more strongly with a milder disease subset
and the relative risk (RR) was 1.9, 1.5 and 1.2 for LES, MES and MUD,
respectively. On the other hand, DRB1*0405 was associated more strongly
with a more severe disease subset, the RR being 1.8, 4.0 and 4.3 for LES,
MES and MUD, respectively. These findings suggest that RA is a
heterogeneous disease, not only clinically, but also in terms of its
immunogenetic background, and that HLA-DRB1 can be a useful prognostic
factor for RA.
ORIGINAL PAPERS
The relationship between HLA-DRB1 alleles and disease subsets of rheumatoid arthritis in Japanese
Department of Orthopaedic Surgery, Osaka-Minami National Hospital, Japan.
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