Physical Activity Attenuates the Influence of FTO Variants on Obesity Risk: A Meta-Analysis of 218,166 Adults and 19,268 Children

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dc.contributor.author Kilpeläinen, Tuomas O -
dc.contributor.author Qi, Lu -
dc.contributor.author Brage, Soren -
dc.contributor.author Kähönen, Mika (Tay) -
dc.contributor.author Lehtimäki, Terho (Tay) -
dc.date.accessioned 2012-06-17T20:14:27Z
dc.date.available 2012-06-16 12:47:25 -
dc.date.available 2012-06-17T20:14:27Z
dc.date.issued 2011 -
dc.identifier.issn 1549-1277 -
dc.identifier.uri http://tampub.uta.fi/handle/10024/65918
dc.description Public Library of Science -
dc.description.abstract Background The FTO gene harbors the strongest known susceptibility locus for obesity. While many individual studies have suggested that physical activity (PA) may attenuate the effect of FTO on obesity risk, other studies have not been able to confirm this interaction. To confirm or refute unambiguously whether PA attenuates the association of FTO with obesity risk, we meta-analyzed data from 45 studies of adults (n = 218,166) and nine studies of children and adolescents (n = 19,268). Methods and Findings All studies identified to have data on the FTO rs9939609 variant (or any proxy [r2>0.8]) and PA were invited to participate, regardless of ethnicity or age of the participants. PA was standardized by categorizing it into a dichotomous variable (physically inactive versus active) in each study. Overall, 25% of adults and 13% of children were categorized as inactive. Interaction analyses were performed within each study by including the FTO×PA interaction term in an additive model, adjusting for age and sex. Subsequently, random effects meta-analysis was used to pool the interaction terms. In adults, the minor (A−) allele of rs9939609 increased the odds of obesity by 1.23-fold/allele (95% CI 1.20–1.26), but PA attenuated this effect (pinteraction = 0.001). More specifically, the minor allele of rs9939609 increased the odds of obesity less in the physically active group (odds ratio = 1.22/allele, 95% CI 1.19–1.25) than in the inactive group (odds ratio = 1.30/allele, 95% CI 1.24–1.36). No such interaction was found in children and adolescents. Conclusions The association of the FTO risk allele with the odds of obesity is attenuated by 27% in physically active adults, highlighting the importance of PA in particular in those genetically predisposed to obesity. -
dc.language.iso en -
dc.title Physical Activity Attenuates the Influence of FTO Variants on Obesity Risk: A Meta-Analysis of 218,166 Adults and 19,268 Children -
dc.type fi=Artikkeli aikakauslehdessä | en=Journal article| -
dc.identifier.urn urn:nbn:uta-3-675 -
dc.identifier.doi 10.1371/journal.pmed.1001116 -
dc.type.version fi=Kustantajan versio | en=Publisher's version| -
dc.subject.okm fi=Biokemia, solu- ja molekyylibiologia | en=Biochemistry, cell and molecular biology| -
dc.administrativeunit fi=Lääketieteen yksikkö | en=School of Medicine| -
dc.journal.title Plos Medicine -
dc.journal.volume 8 -
dc.journal.number 11 -
dc.journal.volumepagerange 1-14 -
dc.oldstats 55 -

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