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- Title
The role of a nonsynonymous CD226 (DNAX-accessory molecule-1) variant (Gly 307Ser) in isolated Addison's disease and autoimmune polyendocrinopathy type 2 pathogenesis.
- Authors
Gan, Earn H.; Mitchell, Anna L.; MacArthur, Katie; Pearce, Simon H. S.
- Abstract
Summary Context Genome-wide association studies have discovered various susceptibility alleles that are shared among different autoimmune conditions, implicating several biochemical pathways in the pathogenesis of autoimmunity. A nonsynonymous polymorphism in exon 7 of the gene encoding the lymphocyte cell-surface CD226 (DNAM1) receptor, Gly307Ser (rs763361), has recently been identified as conferring risk to many autoimmune disorders. We performed a case-control study to determine if the CD226 307Ser variant is also associated with autoimmune Addison's disease (AAD). Patient and design We genotyped rs763361 in a UK cohort of 326 AAD subjects [183 with associated autoimmune conditions - autoimmune polyendocrinopathy syndrome type-2 (APS2)] and 311 healthy controls, using a Taqman genotyping assay. Results The susceptibility 'T' allele at rs763361 was found in 50·5% of patients with AAD compared to 46·5% of controls ( P-value 0·16, OR 1·17; 95% CI 0·94-1·46). However, comparing the APS2 subgroup to healthy controls, the T allele was found in 53·8% vs 46·5% in controls (OR 1·34; CI 1·04-1·74, P-value 0·03). In contrast, the T allele frequency was 46·2% in isolated Addison's disease ( P-value 0·94 vs healthy controls). Conclusion It seems likely that the 307Ser variant of the CD226 receptor is associated with APS2 because of its underlying association with type 1 diabetes and autoimmune thyroid disease. The strength of association in patients with isolated AAD appears to be weak or nonexistent compared to that in APS2.
- Subjects
ADDISON'S disease; AUTOIMMUNE diseases; AUTOIMMUNITY; GENETIC polymorphisms; DIABETES; DISEASE risk factors
- Publication
Clinical Endocrinology, 2011, Vol 75, Issue 2, p165
- ISSN
0300-0664
- Publication type
Article
- DOI
10.1111/j.1365-2265.2011.04030.x