Unit 1209 “Institute for Advanced Biosciences”
Team: “Environmental Epidemiology applied to Reproduction and Respiratory Health”
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A team of researchers from Inserm, CNRS, Université Grenoble Alpes and Barcelona Institute for Global Health has shown that prenatal and postnatal exposure to various chemical pollutants is linked to decreased respiratory function in children. These results, based on the concept of the exposome (defined as the totality of an individual’s environmental exposures from conception until old age), were obtained as part of the European HELIX project and have been published in The Lancet Planetary Health.
With the changes in our lifestyles and the development of synthetic chemistry, exposure to environmental contaminants has become multiple and complex. Pregnancy and the early years of life are recognized as being periods of high sensitivity to environmental factors, with potential lifetime health consequences for the child. Researchers from Inserm, CNRS, Université Grenoble Alpes and Barcelona Institute for Global Health have measured a large number of environmental factors to which children are exposed – including through maternal exposure during pregnancy –, and which are defined as the “early life exposome”.
The researchers collected data from prenatal and postnatal exposures related to the external environment (pollution of the air with fine particles, noise…), chemical contaminants (endocrine disruptors, metals, persistent organic pollutants…), and lifestyle (diet…) in over 1,000 pregnant women and their children in six European countries. Through 85 prenatal exposures and 125 postnatal exposures, a snapshot of the early-life environment was established for each child. The pregnant women and the children had generally been exposed to dozens of chemical substances at variable levels. Over two-thirds of the chemical exposure biomarkers had levels detectable in at least 9 women or 9 children out of 10.
This study, one of the very first large-scale implementations of the exposome approach, suggests links between pre- and postnatal exposure to chemical substances and deteriorated respiratory function in children. Valérie Siroux, Inserm researcher and joint-coordinator of the study specifies: “Identifying the risk factors of decreased early-life respiratory function is important because lung development is a determinant factor not just of a child’s lifetime respiratory health, but also their general health”.
This exposome approach must be seen as an initial selection step making it possible to identify questionable exposures for which more specific research is needed.
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Early-Life exposome and lung function in children from the Helix cohort. The Lancet Planetary Health
Lydiane Agier 1, Xavier Basagaña 2,3,4, Lea Maitre 2,3,4, Berit Granum 6, Philippa Bird 7,
Maribel Casas 2,3,4, Bente Oftedal 6, John Wright 7, Sandra Andrusaityte 8, Montserrat de
Castro 2,3,4, Enrique Cequier 6, Leda Chatzi 9,10,11, David Donaire-Gonzales 2,3,4, Regina
Grazuleviciene 8, Line S. Haug 6, Amrit K. Sakhi 6, Vasiliki Leventakou 11, Rosemary
McEachan 7, Mark Nieuwenhuijsen 2,3,4, Inga Petraviciene 8, Oliver Robinson 5, Theano
Roumeliotaki 11, Jordi Sunyer 2,3,4, Ibon Tamayo 2,3,4, Cathrine Thomsen 6, Jose Urquiza 2,3,4,
Antonia Valentin 2,3,4, Rémy Slama 1, Martine Vrijheid 2,3,4,*, Valérie Siroux 1,*
* Equal contributions
1 Team of Environmental Epidemiology applied to Reproduction and Respiratory Health,
Inserm, CNRS, University Grenoble Alpes, Institute for Advanced Biosciences (IAB), U1209
Joint Research Center, Grenoble, France
2 ISGlobal, Barcelona, Spain
3 Universitat Pompeu Fabra (UPF), Barcelona, Spain
4 CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
5 MRC-PHE Centre for Environment and Health, School of Public Health, Imperial College
London, London, UK
6 Norwegian Institute of Public Health, Oslo, Norway
7 Bradford Institute for Health Research, Bradford Teaching Hospitals NHS Foundation Trust,
8 Department of Environmental Sciences, Vytauto Didziojo Universitetas, Kaunas, Lithuania;
9 Department of Preventive Medicine, Keck School of Medicine, University of Southern
California, Los Angeles, USA
10 Department of Social Medicine, University of Crete, Greece
11 Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences,
Maastricht University, Maastricht, Netherlands
The Lancet Planetary Health. DOI: http://dx.doi.org/10.1016/S2542-5196(19)30010-5