Investigation of rheumatoid arthritis susceptibility loci in juvenile idiopathic arthritis confirms high degree of overlap

Hinks, A. et al. (2012) Investigation of rheumatoid arthritis susceptibility loci in juvenile idiopathic arthritis confirms high degree of overlap. Annals of the Rheumatic Diseases, 71(7), pp. 1117-1121. (doi: 10.1136/annrheumdis-2011-200814)

Abstract

<p>Objectives: Rheumatoid arthritis (RA) shares some similar clinical and pathological features with juvenile idiopathic arthritis (JIA); indeed, the strategy of investigating whether RA susceptibility loci also confer susceptibility to JIA has already proved highly successful in identifying novel JIA loci. A plethora of newly validated RA loci has been reported in the past year. Therefore, the aim of this study was to investigate these single nucleotide polymorphisms (SNP) to determine if they were also associated with JIA.</p> <p>Methods: Thirty-four SNP that showed validated association with RA and had not been investigated previously in the UK JIA cohort were genotyped in JIA cases (n=1242), healthy controls (n=4281), and data were extracted for approximately 5380 UK Caucasian controls from the Wellcome Trust Case–Control Consortium 2. Genotype and allele frequencies were compared between cases with JIA and controls using PLINK. A replication cohort of 813 JIA cases and 3058 controls from the USA was available for validation of any significant findings.</p> <p>Results: Thirteen SNP showed significant association (p<0.05) with JIA and for all but one the direction of association was the same as in RA. Of the eight loci that were tested, three showed significant association in the US cohort.</p> <p>Conclusions: A novel JIA susceptibility locus was identified, CD247, which represents another JIA susceptibility gene whose protein product is important in T-cell activation and signalling. The authors have also confirmed association of the PTPN2 and IL2RA genes with JIA, both reaching genome-wide significance in the combined analysis.</p>

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Gardner-Medwin, Dr Janet
• Authors: Hinks, A., Cobb, J., Sudman, M., Eyre, S., Martin, P., Flynn, E., Packham, J., Barton, A., Worthington, J., Langefeld, C.D., Glass, D.N., Thompson, S.D., Thomson, W., and Gardner-Medwin, J.
• College/School: College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
• Research Group: CAPS
• Journal Name: Annals of the Rheumatic Diseases
• Publisher: B M J Group
• ISSN: 0003-4967
• Published Online: 30 January 2012
• Copyright Holders: Copyright © 2012 BMJ
• First Published: First published in Annals of the Rheumatic Diseases 71(7):1117-1121
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher