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Bayesian refinement of association signals for 14 loci in 3 common diseases.


ABSTRACT: To further investigate susceptibility loci identified by genome-wide association studies, we genotyped 5,500 SNPs across 14 associated regions in 8,000 samples from a control group and 3 diseases: type 2 diabetes (T2D), coronary artery disease (CAD) and Graves' disease. We defined, using Bayes theorem, credible sets of SNPs that were 95% likely, based on posterior probability, to contain the causal disease-associated SNPs. In 3 of the 14 regions, TCF7L2 (T2D), CTLA4 (Graves' disease) and CDKN2A-CDKN2B (T2D), much of the posterior probability rested on a single SNP, and, in 4 other regions (CDKN2A-CDKN2B (CAD) and CDKAL1, FTO and HHEX (T2D)), the 95% sets were small, thereby excluding most SNPs as potentially causal. Very few SNPs in our credible sets had annotated functions, illustrating the limitations in understanding the mechanisms underlying susceptibility to common diseases. Our results also show the value of more detailed mapping to target sequences for functional studies.

SUBMITTER: Wellcome Trust Case Control Consortium 

PROVIDER: S-EPMC3791416 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature

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Bayesian refinement of association signals for 14 loci in 3 common diseases.

Maller Julian B JB   McVean Gilean G   Byrnes Jake J   Vukcevic Damjan D   Palin Kimmo K   Su Zhan Z   Howson Joanna M M JM   Auton Adam A   Myers Simon S   Morris Andrew A   Pirinen Matti M   Brown Matthew A MA   Burton Paul R PR   Caulfield Mark J MJ   Compston Alastair A   Farrall Martin M   Hall Alistair S AS   Hattersley Andrew T AT   Hill Adrian V S AV   Mathew Christopher G CG   Pembrey Marcus M   Satsangi Jack J   Stratton Michael R MR   Worthington Jane J   Craddock Nick N   Hurles Matthew M   Ouwehand Willem W   Parkes Miles M   Rahman Nazneen N   Duncanson Audrey A   Todd John A JA   Kwiatkowski Dominic P DP   Samani Nilesh J NJ   Gough Stephen C L SC   McCarthy Mark I MI   Deloukas Panagiotis P   Donnelly Peter P  

Nature genetics 20121028 12


To further investigate susceptibility loci identified by genome-wide association studies, we genotyped 5,500 SNPs across 14 associated regions in 8,000 samples from a control group and 3 diseases: type 2 diabetes (T2D), coronary artery disease (CAD) and Graves' disease. We defined, using Bayes theorem, credible sets of SNPs that were 95% likely, based on posterior probability, to contain the causal disease-associated SNPs. In 3 of the 14 regions, TCF7L2 (T2D), CTLA4 (Graves' disease) and CDKN2A-  ...[more]

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