Ankylosing spondylitis (AS) is a common chronic immune-mediated arthropathy affecting primarily the spine and pelvis. The condition is strongly associated with as well as other human leukocyte antigen variants and at least 47 individual non-MHC-associated variants. However, substantial additional heritability remains as yet unexplained. To identify further genetic variants associated with the disease, we undertook an association study of AS in 5,040 patients and 21,133 healthy controls using the Illumina Exomechip microarray. A novel association achieving genome-wide significance was noted at . Suggestive associations were demonstrated with common variants in , and and with a low-frequency variant in Two of the variants have been previously associated with inflammatory bowel disease (IBD; and ). These findings further increase the evidence for the marked similarity of genetic risk factors for IBD and AS, consistent with the two diseases having similar aetiopathogenesis.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5685324PMC
http://dx.doi.org/10.1038/npjgenmed.2016.8DOI Listing

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