Genome-wide meta-analysis of 241,258 adults accounting for smoking behaviour identifies novel loci for obesity traits.
Authors | |
Abstract | Few genome-wide association studies (GWAS) account for environmental exposures, like smoking, potentially impacting the overall trait variance when investigating the genetic contribution to obesity-related traits. Here, we use GWAS data from 51,080 current smokers and 190,178 nonsmokers (87% European descent) to identify loci influencing BMI and central adiposity, measured as waist circumference and waist-to-hip ratio both adjusted for BMI. We identify 23 novel genetic loci, and 9 loci with convincing evidence of gene-smoking interaction (GxSMK) on obesity-related traits. We show consistent direction of effect for all identified loci and significance for 18 novel and for 5 interaction loci in an independent study sample. These loci highlight novel biological functions, including response to oxidative stress, addictive behaviour, and regulatory functions emphasizing the importance of accounting for environment in genetic analyses. Our results suggest that tobacco smoking may alter the genetic susceptibility to overall adiposity and body fat distribution. |
Year of Publication | 2017
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Journal | Nat Commun
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Volume | 8
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Pages | 14977
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Date Published | 2017 Apr 26
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ISSN | 2041-1723
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DOI | 10.1038/ncomms14977
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PubMed ID | 28443625
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PubMed Central ID | PMC5414044
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Grant list | N01HC55020 / HL / NHLBI NIH HHS / United States
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RC2 MH089951 / MH / NIMH NIH HHS / United States
RC4 AG039029 / AG / NIA NIH HHS / United States
R01 HL053353 / HL / NHLBI NIH HHS / United States
R01 HL103612 / HL / NHLBI NIH HHS / United States
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P30 ES010126 / ES / NIEHS NIH HHS / United States
N01AG12100 / AG / NIA NIH HHS / United States
R01 AA014041 / AA / NIAAA NIH HHS / United States
R01 MH081802 / MH / NIMH NIH HHS / United States
K05 AA017688 / AA / NIAAA NIH HHS / United States
N01HC95160 / HL / NHLBI NIH HHS / United States
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R03 AG046389 / AG / NIA NIH HHS / United States
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UL1 RR025005 / RR / NCRR NIH HHS / United States
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R01 HL045670 / HL / NHLBI NIH HHS / United States
RG/10/12/28456 / British Heart Foundation / United Kingdom
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