Journal
RHEUMATIC DISEASE CLINICS OF NORTH AMERICA
Volume 38, Issue 3, Pages 539-+Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.rdc.2012.08.018
Keywords
Genetics; Genomics; Ankylosing spondylitis; Axial spondyloarthritis; Arthritis; HLA-B27; ERAP1
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Ankylosing spondylitis (AS) and spondyloarthritis are strongly genetically determined. The long-standing association with HLA-B27 is well described, although the mechanism by which that association induces AS remains uncertain. Recent developments include the description of HLA-B27 tag single nucleotide polymorphisms in European and Asian populations. An increasing number of non-MHC genetic associations have been reported, which provided amongst other things the first evidence of the involvement of the IL-23 pathway in AS. The association with ERAP1 is now known to be restricted to HLA-B27 positive disease. Preliminary studies on the genetics of axial spondyloarthritis demonstrate a lower HLA-B27 carriage rate compared with AS. Studies with larger samples and including non-European ethnic groups are likely to further advance the understanding of the genetics of AS and spondyloarthritis.
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