Fine-mapping type 2 diabetes loci to single-variant resolution using high-density imputation and islet-specific epigenome maps

Mahajan, Anubha; Taliun, Daniel; Thurner, Matthias; Robertson, Neil R.; Torres, Jason M.; Rayner, N. William; Payne, Anthony J.; Steinthorsdottir, Valgerdur; Scott, Robert A.; Grarup, Niels; Cook, James P.; Schmidt, Ellen M.; Wuttke, Matthias; Sarnowski, Chloe; Magill, Reedik; Nano, Jana; Gieger, Christian; Trompet, Stella; Lecoeur, Cecile; Preuss, Michael H.; Prins, Bram Peter; Guo, Xiuqing; Bielak, Lawrence F.; Below, Jennifer E.; Bowden, Donald W.; Chambers, John Campbell; Kim, Young Jin; Ng, Maggie C. Y.; Petty, Lauren E.; Sim, Xueling; Zhang, Weihua; Bennett, Amanda J.; Bork-Jensen, Jette; Brummett, Chad M.; Canouil, Mickael; Kardt, Kai-Uwe Ec; Fischer, Krista; Kardia, Sharon L. R.; Kronenberg, Florian; Lall, Kristi; Liu, Ching-Ti; Locke, Adam E.; Luan, Jian'an; Ntalla, Loanna; Nylander, Vibe; Schönherr, Sebastian; Schurmann, Claudia; Yengo, Loic; Bottinger, Erwin P.; Brandslund, Ivan; Christensen, Cramer; Dedoussis, George; Florez, Jose C.; Ford, Ian; France, Oscar H.; Frayling, Timothy M.; Giedraitis, Vilmantas; Hackinger, Sophie; Hattersley, Andrew T.; Herder, Christian; Ikram, M. Arfan; Ingelsson, Martin; Jorgensen, Marit E.; Jorgensen, Torben; Kriebel, Jennifer; Kuusisto, Johanna; Ligthart, Symen; Lindgren, Cecilia M.; Linneberg, Allan; Lyssenko, Valeriya; Mamakou, Vasiliki; Meitinger, Thomas; Mohlke, Karen L.; Morris, Andrew D.; Nadkarni, Girish; Pankow, James S.; Peters, Annette; Sattar, Naveed; Stancakova, Alena; Strauch, Konstantin; Taylor, Kent D.; Thorand, Barbara; Thorleifsson, Gudmar; Thorsteinsdottir, Unnur; Tuomilehto, Jaakko; Witte, Daniel R.; Dupuis, Josee; Peyser, Patricia A.; Zeggini, Eleftheria; Loos, Ruth J. F.; Froguel, Philippe; Ingelsson, Erik; Lind, Lars; Groop, Leif; Laakso, Markku; Collins, Francis S.; Jukema, J. Wouter; Palmer, Colin N. A.; Grallert, Harald; Metspalu, Andres; Dehghan, Abbas; Koettgen, Anna; Abecasis, Goncalo R.; Meigs, James B.; Rotter, Jerome; Marchini, Jonathan; Pedersen, Oluf; Hansen, Torben; Langenberg, Claudia; Wareham, Nicholas J.; Stefansson, Kari; Gloyn, Anna L.; Morris, Andrew P.; Böhnke, Michael; McCarthy, Mark (2018): Fine-mapping type 2 diabetes loci to single-variant resolution using high-density imputation and islet-specific epigenome maps. In: Nature Genetics, Vol. 50, No. 11: pp. 1505-1513

Abstract

We expanded GWAS discovery for type 2 diabetes (T2D) by combining data from 898,130 European-descent individuals (9% cases), after imputation to high-density reference panels. With these data, we (i) extend the inventory of T2D-risk variants (243 loci,135 newly implicated in T2D predisposition, comprising 403 distinct association signals);(ii) enrich discovery of lower-frequency risk alleles (80 index variants with minor allele frequency <5%,14 with estimated allelic odds ratio >2);(iii) substantially improve fine-mapping of causal variants (at 51 signals, one variant accounted for >80% posterior probability of association (PPA));(iv) extend fine-mapping through integration of tissue-specific epigenomic information (islet regulatory annotations extend the number of variants with PPA >80% to 73);(v) highlight validated therapeutic targets (18 genes with associations attributable to coding variants);and (vi) demonstrate enhanced potential for clinical translation (genome-wide chip heritability explains 18% of T2D risk;individuals in the extremes of a T2D polygenic risk score differ more than ninefold in prevalence).

• Item Type: Journal article
• Faculties: Medicine > Institute for Medical Information Processing, Biometry and Epidemiology
• Subjects: 600 Technology > 610 Medicine and health
• ISSN: 1061-4036
• Language: English