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DOI: 10.1055/s-2008-1081492
© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York
The A98V Single Nucleotide Polymorphism (SNP) in Hepatic Nuclear Factor 1 α (HNF-1α) is Associated with Insulin Sensitivity and β-Cell Function
Publication History
received 24.04.2008
accepted 23.05.2008
Publication Date:
05 September 2008 (online)
![](https://www.thieme-connect.de/media/eced/2008S01/lookinside/thumbnails/10.1055-s-2008-1081492-1.jpg)
Abstract
Objective: Mutations in the hepatic nuclear factor-1-alpha (HNF-1α) gene is considered as a candidate for the aetiology of type 2 diabetes. The aims of the study was to determine whether two single nucleotide polymorphisms (SNPs) ile27-to-leu and ala98-to-val in the HNF-1α gene associate with diabetes, insulin sensitivity as well as β-cell function.
Research Design and Methods: 1 479 subjects of a volunteer sample with increased risk of type 2 diabetes were investigated. They underwent a 75 g oral glucose tolerance test (OGTT) with measurements of plasma glucose, insulin and C-peptide at fasting and at 30, 60, 90 and 120 minutes after the glucose challenge. The HNF-1α SNPs, I27L and A98V were genotyped.
Result: Patients harbouring the V98 allele exhibited higher serum insulin and C-peptide levels. The heterozygote variant was also associated with decrease in beta-cell function but better insulin sensitivity. No significant differences of any clinical parameters were found for I27L gene variants.
Conclusion: Significant associations between the heterozygote A98V genotype and clinical parameters of insulin metabolism were reported but no relationship with type 2 diabetes was obtained. This may be explained by a balancing negative effect on insulin secretion and concomitant positive effect on insulin resistance in Val allele carriers.
Key words
hepatic nuclear factor-1-alpha - β-cell function - insulin sensitivity - diabetes
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1 These authors contributed equally to this work.
Correspondence
Dr. P. E. H. Schwarz
Medical Faculty Carl-Gustav-Carus of the Technical University Dresden
Medical Clinic III, Building 10
Room 108
Fetscherstraße 74
01309 Dresden
Germany
Phone: +49/351/458 27 15
Fax: +49/351/458 73 19
Email: peter.schwarz@uniklinikum-dresden.de