Gestational diabetes mellitus shares polymorphisms of genes associated with insulin resistance and type 2 diabetes in the Greek population

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Abstract

Gestational diabetes mellitus (GDM) and type 2 diabetes (T2D) share common pathophysiological features, including β-cell dysfunction and insulin resistance. In this study, we investigated the association between GDM and five recently identified T2D susceptibility loci, in a Greek population. We studied 148 women with GDM and 107 non-diabetic unrelated pregnant Greek women, for polymorphisms in the TCF7L2 gene (rs7903146 C/T), the PPARG gene (Pro12Ala), the KCNJ11 gene (E23K), the IRS1 gene (G972R) and in the FOXC2 gene (-512C>T). The T-allele of the TCF7L2 rs7903146 (C/T) polymorphism was found to be significantly associated with an increased risk of GDM [p = 0.0003; odds ratio (OR) 2.04 (95%CI 1.38-3.00)]. Additionally, CT and TT genotypes were significantly overrepresented in women with GDM compared to controls (p = 0.0003 and p = 0.0148, respectively). Analysis of the IRS1 G972R polymorphism showed that the R-allele frequency was increased in women with GDM [(p = 0.009; OR 1.67 (95%CI 1.14-2.47)]. The genotypes and allele frequencies of the other polymorphisms studied did not statistically differ between the GDM and the control women. Thus, our data suggest that the common T2D susceptibility polymorphism of TCF7L2 (rs7903146 C/T) gene, and the G972R polymorphism of the IRS1 gene, seem to predispose to GDM in Greek women.

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Pappa, K. I., Gazouli, M., Economou, K., Daskalakis, G., Anastasiou, E., Anagnou, N. P., & Antsaklis, A. (2011). Gestational diabetes mellitus shares polymorphisms of genes associated with insulin resistance and type 2 diabetes in the Greek population. Gynecological Endocrinology, 27(4), 267–272. https://doi.org/10.3109/09513590.2010.490609

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