Rheumatoid arthritis susceptibility loci at chromosomes 10p15, 12q13 and 22q13

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Abstract
Jane Worthington and colleagues report that three SNPs, located on chromosomes 10p15, 12q13 and 22q13, are associated with susceptibility to rheumatoid arthritis. These SNPs had previously been putatively associated with rheumatoid arthritis in the genome-wide association study conducted by the Wellcome Trust Case Control Consortium. The WTCCC study identified 49 SNPs putatively associated with rheumatoid arthritis at P = 1 × 10−4 − 1 × 10−5 (tier 3). Here we show that three of these SNPs, mapping to chromosome 10p15 (rs4750316), 12q13 (rs1678542) and 22q13 (rs3218253), are also associated (trend P = 4 × 10−5, P = 4 × 10−4 and P = 4 × 10−4, respectively) in a validation study of 4,106 individuals with rheumatoid arthritis and an expanded reference group of 11,238 subjects, confirming them as true susceptibility loci in individuals of European ancestry.