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- Title
A genome-wide association study identifies novel risk loci for type 2 diabetes.
- Authors
Sladek, Robert; Rocheleau, Ghislain; Rung, Johan; Dina, Christian; Shen, Lishuang; Serre, David; Boutin, Philippe; Vincent, Daniel; Belisle, Alexandre; Hadjadj, Samy; Balkau, Beverley; Heude, Barbara; Charpentier, Guillaume; Hudson, Thomas J; Montpetit, Alexandre; Pshezhetsky, Alexey V; Prentki, Marc; Posner, Barry I; Balding, David J; Meyre, David; Polychronakos, Constantin; Froguel, Philippe
- Abstract
Type 2 diabetes mellitus results from the interaction of environmental factors with a combination of genetic variants, most of which were hitherto unknown. A systematic search for these variants was recently made possible by the development of high-density arrays that permit the genotyping of hundreds of thousands of polymorphisms. We tested 392,935 single-nucleotide polymorphisms in a French case-control cohort. Markers with the most significant difference in genotype frequencies between cases of type 2 diabetes and controls were fast-tracked for testing in a second cohort. This identified four loci containing variants that confer type 2 diabetes risk, in addition to confirming the known association with the TCF7L2 gene. These loci include a non-synonymous polymorphism in the zinc transporter SLC30A8, which is expressed exclusively in insulin-producing beta-cells, and two linkage disequilibrium blocks that contain genes potentially involved in beta-cell development or function (IDE-KIF11-HHEX and EXT2-ALX4). These associations explain a substantial portion of disease risk and constitute proof of principle for the genome-wide approach to the elucidation of complex genetic traits.
- Publication
Nature, 2007, Vol 445, Issue 7130, p881
- ISSN
1476-4687
- Publication type
Journal Article
- DOI
10.1038/nature05616