title: Associations between ambient air pollution and bone turnover markers in 10-year old children: results from the GINIplus and LISAplus studies.
abstract: Negative associations between bone turnover markers and bone mineral density have been reported. In order to study the association between ambient air pollution and bone turnover markers, as indicators of bone loss, we investigated associations between land-use regression modeled air pollution (NO2, PM2.5 mass, PM2.5 - 10 [coarse particles], PM10 mass and PM2.5 absorbance) and bone turnover markers in 2264 children aged 10 years. Serum osteocalcin and C-terminal telopeptide of type I collagen (CTx), measured by Modular-System (Roche), were the two bone turnover markers considered in this analysis. In total population, NO2, PM2.5 - 10 and PM10 mass exposure were positively and significantly associated with both osteocalcin and CTx. A 2.5 (95% CI: 0.6, 4.4) ng/ml increase in osteocalcin and a 24.0 (95% CI: 6.7, 41.3) ng/L increase in CTx were observed per IQR (6.7μg/m(3)) increase in NO2, independent of socioeconomic status, sex, age, pubertal status, fasting status and total physical activity. The estimated coefficients were 3.0 (95% CI: 0.1, 5.8) for osteocalcin and 32.3 (95% CI: 6.1, 58.5) for CTx with PM2.5 - 10; 3.2 (95% CI: 0.0, 6.4) for osteocalcin and 30.7 (95% CI: 1.7, 59.7) for CTx with PM10. Children living close to a major road (≤ 350m) had higher levels of both osteocalcin (1.4 [-1.2, 4.0] ng/ml) and CTx (16.2 [-7.4, 39.8] ng/L). The adverse impact of ambient air pollution on bone turnover rates observed in one of the study areas showed stimulation of more such studies.
authors.affiliation: Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Epidemiology I, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; Faculty of Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany.
authors.forename: Chuang
authors.initials: C
authors.lastname: Liu
authors.affiliation: Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Epidemiology I, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; School of Population and Public Health, The University of British Columbia, Vancouver, Canada.
authors.forename: Elaine
authors.initials: E
authors.lastname: Fuertes
authors.affiliation: Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Epidemiology I, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
authors.forename: Claudia
authors.initials: C
authors.lastname: Flexeder
authors.affiliation: Medizinische Klinik III, Universitätsklinikum Dresden, Dresden, Germany.
authors.forename: Lorenz C
authors.initials: LC
authors.lastname: Hofbauer
authors.affiliation: Department of Pediatrics, Marien Hospital Wesel, Wesel, Germany.
authors.forename: Dietrich
authors.initials: D
authors.lastname: Berdel
authors.affiliation: IUF Leibniz Research Institute for Environmental Medicine and Medical Faculty, Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany.
authors.forename: Barbara
authors.initials: B
authors.lastname: Hoffmann
authors.affiliation: Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Leipzig, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Kratzsch
authors.affiliation: Department of Pediatrics, Marien Hospital Wesel, Wesel, Germany.
authors.forename: Andrea
authors.initials: A
authors.lastname: von Berg
authors.affiliation: Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Epidemiology I, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany. Electronic address: heinrich@helmholtz-muenchen.de.
authors.forename: Joachim
authors.initials: J
authors.lastname: Heinrich
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D015415:Biomarkers / Q000097:blood; D015519:Bone Density; D001846:Bone Development; D002648:Child; D015331:Cohort Studies; D024042:Collagen Type I / Q000097:blood*; D004781:Environmental Exposure / Q000032:analysis*; D005260:Female; D005858:Germany; D006801:Humans; D008297:Male; D015675:Osteocalcin / Q000097:blood*; D052638:Particulate Matter / Q000633:toxicity*; D010455:Peptides / Q000097:blood*
chemical_list: D015415:Biomarkers; D024042:Collagen Type I; D052638:Particulate Matter; D010455:Peptides; C052929:collagen type I trimeric cross-linked peptide; D015675:Osteocalcin
keywords: Ambient air pollution; Bone health; Bone turnover markers; Children; Epidemiology