The interferon induced with helicase domain 1 A946T polymorphism is not associated with rheumatoid arthritis

被引:25
作者
Marinou, Ioanna
Montgomery, Douglas S.
Dickson, Marion C.
Binks, Michael H.
Moore, David J.
Bax, Deborah E.
Wilson, Anthony G. [1 ]
机构
[1] Univ Sheffield, Sch Musculoskeletal Sci, Sch Med & Biomed Sci, Royal Hallamshire Hosp, Sheffield S10 2RX, S Yorkshire, England
[2] GlaxoSmithKline R&D, Stevenage SG1 2NY, Herts, England
关键词
D O I
10.1186/ar2179
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
An important feature of autoimmune diseases is the overlap of pathophysiological characteristics. Clustering of autoimmune diseases in families suggests that genetic variants may contribute to autoimmunity. The aim of the present study was to investigate the role of the interferon induced with helicase domain 1 (IFIH1) A946T ( rs1990760 A > G) variant in rheumatoid arthritis ( RA), as this was recently associated with susceptibility to type 1 diabetes. A total of 965 Caucasians with RA and 988 healthy controls were genotyped for IFIH1 A946T. Gene expression of IFIH1 was measured in peripheral blood leukocytes using real-time PCR. Genotypes were equally distributed in both RA cases and healthy controls ( odds ratio for allele C = 0.9, 95% confidence interval = 0.8 - 1.0, P = 0.3). No association was detected after stratification by sex, age at onset, rheumatoid factor status, anti-cyclic citrullinated peptide status or radiological joint damage. Levels of IFIH1 mRNA were approximately twofold higher in blood leucocytes of RA cases compared with healthy controls ( P < 0.0001). These results indicate that the IFIH1 is upregulated in RA but that the A946T variant does not contribute significantly to the genetic background of RA.
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页数:5
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