Polymorphisms in the SLC2A2 (GLUT2) gene are associated with the conversion from impaired glucose tolerance to type 2 diabetes: the Finnish Diabetes Prevention Study |
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Authors: | Laukkanen Olli Lindström Jaana Eriksson Johan Valle Timo T Hämäläinen Helena Ilanne-Parikka Pirjo Keinänen-Kiukaanniemi Sirkka Tuomilehto Jaakko Uusitupa Matti Laakso Markku;Finnish Diabetes Prevention Study |
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Institution: | Department of Medicine, University of Kuopio, 70210 Kuopio, Finland. |
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Abstract: | Impaired insulin secretion is a fundamental defect in type 2 diabetes. The aim of this study was to investigate whether single nucleotide polymorphisms (SNPs) in the genes regulating insulin secretion (SLC2A2 encoding GLUT2], GCK, TCF1 encoding HNF-1alpha], HNF4A, GIP, and GLP1R) are associated with the conversion from impaired glucose tolerance (IGT) to type 2 diabetes in participants of the Finnish Diabetes Prevention Study. With the exception of SLC2A2, other genes were not associated with the risk of type 2 diabetes. All four SNPs of SLC2A2 predicted the conversion to diabetes, and rs5393 (AA genotype) increased the risk of type 2 diabetes in the entire study population by threefold (odds ratio 3.04, 95% CI 1.34-6.88, P = 0.008). The risk for type 2 diabetes in the AA genotype carriers was increased in the control group (5.56 1.78-17.39], P = 0.003) but not in the intervention group. We conclude that the SNPs of SLC2A2 predict the conversion to diabetes in obese subjects with IGT. |
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