Horm Metab Res 2009; 41(6): 426-429
DOI: 10.1055/s-0029-1214414
Humans, Clinical

© Georg Thieme Verlag KG Stuttgart · New York

CTLA-4 CT60 Polymorphism in Thyroid and Polyglandular Autoimmunity

G. Dultz 1 , N. Matheis 1 , M. Dittmar 2 , K. Bender 3 , G. J. Kahaly 1
  • 1Department of Medicine I, Gutenberg University, Mainz, Germany
  • 2Department of Human Biology, Christian-Albrechts-University, Kiel, Germany
  • 3Institute of Legal Medicine, Gutenberg University, Mainz, Germany
Further Information

Publication History

received 18.12.2008

accepted 11.02.2009

Publication Date:
06 April 2009 (online)

Abstract

Autoimmune thyroid diseases (AITDs) frequently occur together with other endocrine autoimmune conditions, denominated as polyglandular autoimmunity (PGA). The cytotoxic T-lymphocyte antigen 4 (CTLA-4) gene was recently associated with AITD and PGA, and the CTLA-4 protein is a strong inhibitor of T-cells. The tumor necrosis factor alpha (TNF-α) is a proinflammatory cytokine. This study aimed to analyze the association of the CTLA-4 CT60 and TNF-α -863 polymorphisms with PGA. Homogeneous groups of 70 patients with AITD, 70 with type 1 diabetes (T1D), 70 with both AITD and T1D (PGA), and 100 healthy controls were genotyped for the CTLA-4 CT60 and TNF-α -863 polymorphisms by minisequencing on an ABI PRISM-3100 genetic analyzer. The CT60 G/G genotype was significantly more common in patients with PGA than in healthy controls (48.6% vs. 32.0%, OR=2.01, 95% CI=1.07–3.77, p=0.038). The CT60 allele frequencies differed as well between PGA patients and controls, with the predisposing G allele being increased in PGA (OR=1.63, 95% CI=1.03–2.55, p=0.042). Patients with PGA did not differ from those with AITD (p=0.602) or T1D (p=0.362). For TNF-α -863, carriers of the minor A allele occurred more frequently in the T1D group than in controls (47.1% vs. 33%, OR=1.81, 95% CI=0.97–3.39, p=0.079), but no differences in allele or genotype distribution were noted between PGA patients and controls (p=0.886 and 0.389, respectively). In conclusion the CTLA-4 CT60 polymorphism is associated with PGA.

References

Correspondence

Prof. Dr. G. J. Kahaly

Department of Medicine I

Gutenberg University Hospital

Langenbeckstr. 1

55131 Mainz

Germany

Phone: +49/6131/17 37 68

Fax: +49/6131/17 34 60

Email: [email protected]