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CTLA4 exon1 A49G polymorphism in Slovak patients with rheumatoid arthritis and Hashimoto thyroiditis—results and the review of the literature

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Abstract

Autoimmune thyroid diseases frequently overlaps with rheumatoid arthritis (RA). Among genetic factors, the role of the HLA antigens and CTLA4 gene polymorphisms in the overlapping has been suggested. The aim of this study was to investigate the alleles and genotypes frequency of the CTLA4 exon1 A49G polymorphism in Slovak patients with RA, Hashimoto thyroiditis (HT), both (RA + HT) and in healthy controls. Fifty-seven unrelated adults with RA, 57 patients with HT, 34 patients with both (RA + HT), and 51 normal subjects were studied. All were ethnic Slovaks living in the same geographical area. The CTLA4 exon1 A49G polymorphism was genotyped by using small amplicon melting analysis after real-time PCR. The CTLA4 49GG genotype and G allele frequency in the group with RA was not significantly higher in comparison with controls (10.53% vs. 9.8%, p = 0.62, OR 1.39, 95% CI 0.35–5.74 and 39.47% vs. 34.31%, p = 0.43, OR 1.25, 95% CI 0.72–2.18). The frequency of GG genotype was slightly but not significantly higher in patients with HT as compared with control group (19.3% vs. 9.8%, p = 0.17, OR 2.27, 95% CI 0.67–8.45). However, the frequency of GG genotype and G allele in patients with both RA and HT was significantly higher than that in controls (29.41% vs. 9.8%, p = 0.02, OR 4.49, 95% CI 1.20–18.54 and 51.47% vs. 34.31%, p = 0.03, OR 2.02, 95% CI 1.08–3.81). The frequency of GG genotype of CTLA4 A49G gene polymorphism in Slovak patients with RA is not significantly higher in comparison to control group. However, carriers of GG genotype with RA may be susceptible to develop HT.

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Authors and Affiliations

  1. 1st Department of Internal Medicine Medical Faculty, P.J.Šafárik University, Trieda SNP 1, 04011, Košice, Slovakia

    Karim Benhatchi, Ivana Jochmanová, Hedviga Wagnerová & Ivica Lazúrová

  2. Department of Biology Medical Faculty, P.J. Šafárik University Košice, Trieda SNP 1, 04011, Košice, Slovakia

    Viera Habalová

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  1. Karim Benhatchi
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  2. Ivana Jochmanová
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Correspondence to Ivica Lazúrová.

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Benhatchi, K., Jochmanová, I., Habalová, V. et al. CTLA4 exon1 A49G polymorphism in Slovak patients with rheumatoid arthritis and Hashimoto thyroiditis—results and the review of the literature. Clin Rheumatol 30, 1319–1324 (2011). https://doi.org/10.1007/s10067-011-1752-z

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  • DOI: https://doi.org/10.1007/s10067-011-1752-z

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