Genome-wide association study in individuals of South Asian ancestry identifies six new type 2 diabetes susceptibility loci.

TitleGenome-wide association study in individuals of South Asian ancestry identifies six new type 2 diabetes susceptibility loci.
Publication TypeJournal Article
Year of Publication2011
AuthorsKooner JS, Saleheen D, Sim X, Sehmi J, Zhang W, Frossard P, Been LF, Chia K-S, Dimas AS, Hassanali N, Jafar T, Jowett JBM, Li X, Radha V, Rees SD, Takeuchi F, Young R, Aung T, Basit A, Chidambaram M, Das D, Grundberg E, Hedman AK, Hydrie ZI, Islam M, Khor C-C, Kowlessur S, Kristensen MM, Liju S, Lim W-Y, Matthews DR, Liu J, Morris AP, Nica AC, Pinidiyapathirage JM, Prokopenko I, Rasheed A, Samuel M, Shah N, Shera SA, Small KS, Suo C, Wickremasinghe AR, Wong T Y, Yang M, Zhang F, Abecasis GR, Barnett AH, Caulfield M, Deloukas P, Frayling TM, Froguel P, Kato N, Katulanda P, Kelly AM, Liang J, Mohan V, Sanghera DK, Scott J, Seielstad M, Zimmet PZ, Elliott P, Teo Y Y, McCarthy MI, Danesh J, Tai SE, Chambers JC
Corporate AuthorsDIAGRAM, MuTHER
JournalNat Genet
Volume43
Issue10
Pagination984-9
Date Published2011 Oct
ISSN1546-1718
KeywordsAsian Continental Ancestry Group, Case-Control Studies, Diabetes Mellitus, Type 2, Female, Gene Expression Regulation, Genetic Predisposition to Disease, Genetics, Population, Genome, Human, Genome-Wide Association Study, Humans, Linkage Disequilibrium, London, Male, Pakistan, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Singapore
Abstract

We carried out a genome-wide association study of type-2 diabetes (T2D) in individuals of South Asian ancestry. Our discovery set included 5,561 individuals with T2D (cases) and 14,458 controls drawn from studies in London, Pakistan and Singapore. We identified 20 independent SNPs associated with T2D at P < 10(-4) for testing in a replication sample of 13,170 cases and 25,398 controls, also all of South Asian ancestry. In the combined analysis, we identified common genetic variants at six loci (GRB14, ST6GAL1, VPS26A, HMG20A, AP3S2 and HNF4A) newly associated with T2D (P = 4.1 × 10(-8) to P = 1.9 × 10(-11)). SNPs at GRB14 were also associated with insulin sensitivity (P = 5.0 × 10(-4)), and SNPs at ST6GAL1 and HNF4A were also associated with pancreatic beta-cell function (P = 0.02 and P = 0.001, respectively). Our findings provide additional insight into mechanisms underlying T2D and show the potential for new discovery from genetic association studies in South Asians, a population with increased susceptibility to T2D.

DOI10.1038/ng.921
Alternate JournalNat. Genet.
PubMed ID21874001