The GTF2I rs117026326 polymorphism is associated with anti-SSA-positive primary Sjögren's syndrome.

Rheumatology (Oxford)

Laboratory of Autoimmunity, Medical College of Xiamen University, Xiamen, 361102, Department of Rheumatology, First Afflict Hospital of Xiamen University, Xiamen, 361003, Department of Clinical Laboratory, Xiamen University Hospital, Xiamen University, Xiamen, 361005, Eye Institute and Affiliated Xiamen Eye Center of Xiamen University, Xiamen, 361102, China and Priority Area Asthma & Allergy, Research Center Borstel, 23845 Borstel, Germany. Laboratory of Autoimmunity, Medical College of Xiamen University, Xiamen, 361102, Department of Rheumatology, First Afflict Hospital of Xiamen University, Xiamen, 361003, Department of Clinical Laboratory, Xiamen University Hospital, Xiamen University, Xiamen, 361005, Eye Institute and Affiliated Xiamen Eye Center of Xiamen University, Xiamen, 361102, China and Priority Area Asthma & Allergy, Research Center Borstel, 23845 Borstel, Germany.

Published: March 2015

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http://dx.doi.org/10.1093/rheumatology/keu466DOI Listing

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  • Genetic factors, particularly two single-nucleotide polymorphisms (SNPs) in the GTF2I gene, are linked to a higher susceptibility to chronic kidney disease (CKD) in the Taiwanese population, affecting prevalence and onset age.
  • Men with specific GTF2I genotypes (CT/TT and CT/CC) are at greater risk for developing CKD compared to women, especially with lower estimated glomerular filtration rates (eGFR).
  • A study involving over 58,000 participants revealed that those with CKD also have a higher occurrence of metabolic, cardiovascular, autoimmune, and nephritic disorders, highlighting the importance of these genetic variants in kidney-related diseases.
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Genetic association studies have discovered the intergenic region as a strong susceptibility locus for multiple autoimmune disorders, with the missense mutation rs201802880 as the causal polymorphism. In this work, we aimed to perform a comprehensive meta-analysis of the association of the locus with various autoimmune diseases and to provide a systemic review on potential mechanisms underlying the effect of the causal risk variants. The frequencies of the two most extensively investigated polymorphisms within the locus, rs117026326 and rs201802880, vary remarkably across the world, with the highest frequencies in East Asian populations.

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Sjögren's syndrome (SS) is an autoimmune disease characterized by inflammation with lymphoid infiltration and destruction of the salivary glands. Although many genome-wide association studies have revealed disease-associated risk alleles, the functions of the majority of these alleles are unclear. Here, we show previously unrecognized roles of GTF2I molecules by using two SS-associated single nucleotide polymorphisms (SNPs), rs73366469 and rs117026326 (GTF2I SNPs).

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