Li, S and Zhao, JH and Luan, J and Langenberg, C and Luben, RN and Khaw, KT and Wareham, NJ and Loos, RJF (2011) Genetic predisposition to obesity leads to increased risk of type 2 diabetes. DIABETOLOGIA , 54 (4) 776 - 782. 10.1007/s00125-011-2044-5.
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Obesity is a major risk factor for type 2 diabetes. Recent genome-wide association (GWA) studies have identified multiple loci robustly associated with BMI and risk of obesity. However, information on their associations with type 2 diabetes is limited. Such information could help increase our understanding of the link between obesity and type 2 diabetes. We examined the associations of 12 obesity susceptibility loci, individually and in combination, with risk of type 2 diabetes in the population-based European Prospective Investigation of Cancer (EPIC) Norfolk cohort.We genotyped 12 SNPs, identified by GWA studies of BMI, in 20,428 individuals (aged 39-79 years at baseline) with an average follow-up of 12.9 years, during which 729 individuals developed type 2 diabetes. A genetic predisposition score was calculated by adding the BMI-increasing alleles across the 12 SNPs. Associations with incidence of type 2 diabetes were examined by logistic regression models.Of the 12 SNPs, eight showed a trend with increased risk of type 2 diabetes, consistent with their BMI-increasing effects. Each additional BMI-increasing allele in the genetic predisposition score was associated with a 4% increased odds of developing type 2 diabetes (OR 1.041, 95% CI 1.005-1.078; p = 0.02). Adjustment for BMI completely abolished the association with incident type 2 diabetes (OR 1.003, 95% CI 0.967-1.039; p = 0.89).The genetic predisposition to obesity leads to increased risk of developing type 2 diabetes, which is completely mediated by its obesity-predisposing effect.
|Title:||Genetic predisposition to obesity leads to increased risk of type 2 diabetes|
|Keywords:||Genetic predisposition, Genome-wide association studies, Obesity, Type 2 diabetes, COMMON CHRONIC DISEASES, WIDE ASSOCIATION DATA, BODY-MASS INDEX, FTO GENE, VARIANTS, LOCI, METAANALYSIS, REPLICATION, NORFOLK, HEALTHY|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health Care > Epidemiology and Public Health|
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