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Gene x dietary pattern interactions in obesity: analysis of up to 68 317 adults of European ancestry
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2015 (English)In: Human Molecular Genetics, ISSN 0964-6906, E-ISSN 1460-2083, Vol. 24, no 16, 4728-4738 p.Article in journal (Refereed) Published
Abstract [en]

Obesity is highly heritable. Genetic variants showing robust associationswith obesity traits have been identified through genome wide association studies. We investigated whether a composite score representing healthy diet modifies associations of these variants with obesity traits. Totally, 32 body mass index (BMI)- and 14 waist-hip ratio (WHR)-associated single nucleotide polymorphismswere genotyped, and genetic risk scores (GRS) were calculated in 18 cohorts of European ancestry (n = 68 317). Diet score was calculated based on self-reported intakes of whole grains, fish, fruits, vegetables, nuts/seeds (favorable) and red/processed meats, sweets, sugar-sweetened beverages and fried potatoes (unfavorable). Multivariable adjusted, linear regression within each cohort followed by inverse variance-weighted, fixed-effects meta-analysis was used to characterize: (a) associations of each GRS with BMI and BMI-adjustedWHR and (b) diet score modification of genetic associations with BMI and BMI-adjusted WHR. Nominally significant interactions (P = 0.006-0.04) were observed between the diet score and WHR-GRS (but not BMI-GRS), two WHR loci (GRB14 rs10195252; LYPLAL1 rs4846567) and two BMI loci (LRRN6C rs10968576; MTIF3 rs4771122), for the respective BMI-adjustedWHR or BMI outcomes. Although the magnitudes of these select interactions were small, our data indicated that associations between genetic predisposition and obesity traits were stronger with a healthier diet. Our findings generate interesting hypotheses; however, experimental and functional studies are needed to determine their clinical relevance.

Place, publisher, year, edition, pages
Oxford University Press, 2015. Vol. 24, no 16, 4728-4738 p.
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy) Medical Genetics Nutrition and Dietetics
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URN: urn:nbn:se:umu:diva-109946DOI: 10.1093/hmg/ddv186ISI: 000361315400020PubMedID: 25994509OAI: oai:DiVA.org:umu-109946DiVA: diva2:860928
Available from: 2015-10-14 Created: 2015-10-09 Last updated: 2017-12-01Bibliographically approved

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Johansson, IngegerdHallmans, GöranRenström, FridaFranks, Paul W
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Department of OdontologyNutritional ResearchDepartment of Biobank ResearchMedicine
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Human Molecular Genetics
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)Medical GeneticsNutrition and Dietetics

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