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The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-206) under grant agreement no 308333-the HELIX project. Dr Maribel Casas and Dr Jordi Julvez received funding from Instituto de Salud Carlos III (Ministry of Economy and Competitiveness) (MS16/00128, MS14/00108). INMA data collections were supported by grants from the Instituto de Salud Carlos III, CIBERESP, the Conselleria de Sanitat, Generalitat Valenciana, Department of Health of the Basque Government; the Provincial Government of Gipuzkoa, and the Generalitat de Catalunya-CIRIT. KANC was funded by the grant of the Lithuanian Agency for Science Innovation and Technology (6-04-2014_31V-66). The Norwegian Mother and Child Cohort Study (MoBa) is supported by the Norwegian Ministry of Health and the Ministry of Education and Research, NIH/NIEHS (contract no. N01-ES-75558), and NIH/NINDS (grant no. 1 UO1 NS 047537-01 and grant no. 2 UO1 NS 047537-06A1). The Rhea project was financially supported by European projects, and the Greek Ministry of Health (Program of Prevention of Obesity and Neurodevelopmental Disorders in Preschool Children, in Heraklion district, Crete, Greece: 2011-2014; 'Rhea Plus': Primary Prevention Program of Environmental Risk Factors for Reproductive Health, and Child Health: 2012-2015). The work was also supported by MICINN (MTM2015-68140-R) and Centro Nacional de Genotipado-CEGEN-PRB2-ISCIII. CW received funding from the Fondation de France.

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Human Early Life Exposome (HELIX) study: a European population-based exposome cohort

Publicat a:Bmj Open. 8 (9): e021311- - 2018-09-01 8(9), DOI: 10.1136/bmjopen-2017-021311

Autors: Maitre, L; de Bont, J; Casas, M; Robinson, O; Aasvang, GM; Agier, L; Andrusaityte, S; Ballester, F; Basagaña, X; Borràs, E; Brochot, C; Bustamante, M; Carracedo, A; de Castro, M; Dedele, A; Donaire-Gonzalez, D; Estivill, X; Evandt, J; Fossati, S; Giorgis-Allemand, L; Gonzalez, JR; Granum, B; Grazuleviciene, R; Gützkow, KB; Haug, LS; Hernandez-Ferrer, C; Heude, B; Ibarluzea, J; Julvez, J; Karachaliou, M; Keun, HC; Krog, NH; Lau, CHE; Leventakou, V; Lyon-Caen, S; Manzano, C; Mason, D; McEachan, R; Meltzer, HM; Petraviciene, I; Quentin, J; Roumeliotaki, T; Sabido, E; Saulnier, PJ; Siskos, AP; Siroux, V; Sunyer, J; Tamayo, I; Urquiza, J; Vafeiadi, M; van Gent, D; Vives-Usano, M; Waiblinger, D; Warembourg, C; Chatzi, L; Coen, M; van den Hazel, P; Nieuwenhuijsen, MJ; Slama, R; Thomsen, C; Wright, J; Vrijheid, M

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Essential to exposome research is the collection of data on many environmental exposures from different domains in the same subjects. The aim of the Human Early Life Exposome (HELIX) study was to measure and describe multiple environmental exposures during early life (pregnancy and childhood) in a prospective cohort and associate these exposures with molecular omics signatures and child health outcomes. Here, we describe recruitment, measurements available and baseline data of the HELIX study populations.The HELIX study represents a collaborative project across six established and ongoing longitudinal population-based birth cohort studies in six European countries (France, Greece, Lithuania, Norway, Spain and the UK). HELIX used a multilevel study design with the entire study population totalling 31 472 mother-child pairs, recruited during pregnancy, in the six existing cohorts (first level); a subcohort of 1301 mother-child pairs where biomarkers, omics signatures and child health outcomes were measured at age 6-11 years (second level) and repeat-sampling panel studies with around 150 children and 150 pregnant women aimed at collecting personal exposure data (third level).Cohort data include urban environment, hazardous substances and lifestyle-related exposures for women during pregnancy and their offspring from birth until 6-11 years. Common, standardised protocols were used to collect biological samples, measure exposure biomarkers and omics signatures and assess child health across the six cohorts. Baseline data of the cohort show substantial variation in health outcomes and determinants between the six countries, for example, in family affluence levels, tobacco smoking, physical activity, dietary habits and prevalence of childhood obesity, asthma, allergies and attention deficit hyperactivity disorder.HELIX study results will inform on the early life exposome and its association with molecular omics signatures and child health outcomes. Cohort data are accessible for future research involving researchers external to the project.© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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