Genome-wide meta-analysis of 241,258 adults accounting for smoking behaviour identifies novel loci for obesity traits.
Justice AE., Winkler TW., Feitosa MF., Graff M., Fisher VA., Young K., Barata L., Deng X., Czajkowski J., Hadley D., Ngwa JS., Ahluwalia TS., Chu AY., Heard-Costa NL., Lim E., Perez J., Eicher JD., Kutalik Z., Xue L., Mahajan A., Renström F., Wu J., Qi Q., Ahmad S., Alfred T., Amin N., Bielak LF., Bonnefond A., Bragg J., Cadby G., Chittani M., Coggeshall S., Corre T., Direk N., Eriksson J., Fischer K., Gorski M., Neergaard Harder M., Horikoshi M., Huang T., Huffman JE., Jackson AU., Justesen JM., Kanoni S., Kinnunen L., Kleber ME., Komulainen P., Kumari M., Lim U., Luan J., Lyytikäinen L-P., Mangino M., Manichaikul A., Marten J., Middelberg RPS., Müller-Nurasyid M., Navarro P., Pérusse L., Pervjakova N., Sarti C., Smith AV., Smith JA., Stančáková A., Strawbridge RJ., Stringham HM., Sung YJ., Tanaka T., Teumer A., Trompet S., van der Laan SW., van der Most PJ., Van Vliet-Ostaptchouk JV., Vedantam SL., Verweij N., Vink JM., Vitart V., Wu Y., Yengo L., Zhang W., Hua Zhao J., Zimmermann ME., Zubair N., Abecasis GR., Adair LS., Afaq S., Afzal U., Bakker SJL., Bartz TM., Beilby J., Bergman RN., Bergmann S., Biffar R., Blangero J., Boerwinkle E., Bonnycastle LL., Bottinger E., Braga D., Buckley BM., Buyske S., Campbell H., Chambers JC., Collins FS., Curran JE., de Borst GJ., de Craen AJM., de Geus EJC., Dedoussis G., Delgado GE., den Ruijter HM., Eiriksdottir G., Eriksson AL., Esko T., Faul JD., Ford I., Forrester T., Gertow K., Gigante B., Glorioso N., Gong J., Grallert H., Grammer TB., Grarup N., Haitjema S., Hallmans G., Hamsten A., Hansen T., Harris TB., Hartman CA., Hassinen M., Hastie ND., Heath AC., Hernandez D., Hindorff L., Hocking LJ., Hollensted M., Holmen OL., Homuth G., Jan Hottenga J., Huang J., Hung J., Hutri-Kähönen N., Ingelsson E., James AL., Jansson J-O., Jarvelin M-R., Jhun MA., Jørgensen ME., Juonala M., Kähönen M., Karlsson M., Koistinen HA., Kolcic I., Kolovou G., Kooperberg C., Krämer BK., Kuusisto J., Kvaløy K., Lakka TA., Langenberg C., Launer LJ., Leander K., Lee NR., Lind L., Lindgren CM., Linneberg A., Lobbens S., Loh M., Lorentzon M., Luben R., Lubke G., Ludolph-Donislawski A., Lupoli S., Madden PAF., Männikkö R., Marques-Vidal P., Martin NG., McKenzie CA., McKnight B., Mellström D., Menni C., Montgomery GW., Musk AB., Narisu N., Nauck M., Nolte IM., Oldehinkel AJ., Olden M., Ong KK., Padmanabhan S., Peyser PA., Pisinger C., Porteous DJ., Raitakari OT., Rankinen T., Rao DC., Rasmussen-Torvik LJ., Rawal R., Rice T., Ridker PM., Rose LM., Bien SA., Rudan I., Sanna S., Sarzynski MA., Sattar N., Savonen K., Schlessinger D., Scholtens S., Schurmann C., Scott RA., Sennblad B., Siemelink MA., Silbernagel G., Slagboom PE., Snieder H., Staessen JA., Stott DJ., Swertz MA., Swift AJ., Taylor KD., Tayo BO., Thorand B., Thuillier D., Tuomilehto J., Uitterlinden AG., Vandenput L., Vohl M-C., Völzke H., Vonk JM., Waeber G., Waldenberger M., Westendorp RGJ., Wild S., Willemsen G., Wolffenbuttel BHR., Wong A., Wright AF., Zhao W., Zillikens MC., Baldassarre D., Balkau B., Bandinelli S., Böger CA., Boomsma DI., Bouchard C., Bruinenberg M., Chasman DI., Chen Y-D., Chines PS., Cooper RS., Cucca F., Cusi D., Faire UD., Ferrucci L., Franks PW., Froguel P., Gordon-Larsen P., Grabe H-J., Gudnason V., Haiman CA., Hayward C., Hveem K., Johnson AD., Wouter Jukema J., Kardia SLR., Kivimaki M., Kooner JS., Kuh D., Laakso M., Lehtimäki T., Marchand LL., März W., McCarthy MI., Metspalu A., Morris AP., Ohlsson C., Palmer LJ., Pasterkamp G., Pedersen O., Peters A., Peters U., Polasek O., Psaty BM., Qi L., Rauramaa R., Smith BH., Sørensen TIA., Strauch K., Tiemeier H., Tremoli E., van der Harst P., Vestergaard H., Vollenweider P., Wareham NJ., Weir DR., Whitfield JB., Wilson JF., Tyrrell J., Frayling TM., Barroso I., Boehnke M., Deloukas P., Fox CS., Hirschhorn JN., Hunter DJ., Spector TD., Strachan DP., van Duijn CM., Heid IM., Mohlke KL., Marchini J., Loos RJF., Kilpeläinen TO., Liu C-T., Borecki IB., North KE., Cupples LA.
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.