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Association of the AFF3 gene and IL2/IL21 gene region with juvenile idiopathic arthritis

By A. Hinks, S. Eyre, X. Ke, A. Barton, P. Martin, E. Flynn, J. Packham, J. Worthington, W. Thomson, J. [CAPS and BSPAR study groups] Gardner-Medwin, Childhood Arthritis Prospective Study (CAPS), UKRAG Consortium and British Society of Paediatric and Adolescent Rheumatology (BSPAR) Study Group


Recent genetic studies have led to identification of numerous loci that are associated with susceptibility to autoimmune diseases. The strategy of using information from these studies has facilitated the identification of novel juvenile idiopathic arthritis (JIA) susceptibility loci, specifically, PTPN22 and IL2RA. Several novel autoimmune susceptibility loci have recently been identified, and we hypothesise that single-nucleotide polymorphisms (SNPs) within these genes may also be JIA susceptibility loci. Five SNPs within the genes AFF3, IL2/IL21, IL7R, CTLA4 and CD226, previously associated with multiple autoimmune diseases were genotyped, in a large data set of Caucasian JIA patients and controls, and tested for association with JIA. We identified two susceptibility loci for JIA, AFF3 and the IL2/IL21 region and additional weak evidence supporting an association with the CTLA4 and IL7R genes, which warrant further investigation. All results require validation in independent JIA data sets. Further characterisation of the specific causal variants will be required before functional studies can be performed

Topics: R1, QH426
Publisher: Macmillan Publishers Limited
Year: 2010
OAI identifier:
Provided by: Enlighten

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