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High plasma organochlorine pesticide levels are related to increased biological age as calculated by DNA methylation analysis
Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden.
Örebro University, School of Science and Technology. Department of Medical Sciences, Molecular Epidemiology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden. (MTM)ORCID iD: 0000-0001-5752-4196
Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University, Uppsala, Sweden.
2018 (English)In: Environment International, ISSN 0160-4120, E-ISSN 1873-6750, Vol. 113, p. 109-113Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Organochlorine pesticides (OCPs) have been shown in the experimental setting to alter DNA methylation. Since DNA methylation changes during the life-span, formulas have been presented to calculate "DNA methylation age" as a measure of biological age.

OBJECTIVES: We aimed to investigate if circulating levels of three OCPs were related to increased DNA methylation age METHODS: 71CpG DNA methylation age (Hannum formula) was calculated based on data from the Illumina 450 k Bead Methylation chip in 1000 subjects in the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS) study (50% women, all aged 70 years at the examination). The difference between DNA methylation age and chronological age was calculated (DiffAge). 2,2-bis (4-chlorophenyl)-1,1-dichloroethene (p,p'-DDE), hexachlorobenzene (HCB), and transnonachlor (TNC) levels were measured in plasma by high-resolution gas chromatography coupled mass spectrometry (HRGC-HRMS).

RESULTS: Increased p,p'-DDE and TNC, but not HCB, levels were related to increased DiffAge both in sex and BMI-adjusted models, as well as in multiple adjusted models (sex, education level, exercise habits, smoking, energy and alcohol consumption and BMI) (p = 0.0051 and p = 0.011, respectively). No significant interactions between the OCPs and sex or BMI regarding DiffAge were found.

CONCLUSION: In this cross-sectional study, increased levels of two out of three OCPs were related to increased DNA methylation age, further suggesting negative health effects in humans of these widespread environmental contaminants.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 113, p. 109-113
Keywords [en]
Biological age, Epidemiology, Methylation, Organochlorine pesticides (OCPs), Transnonachlor, p, p′-DDE
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:oru:diva-66468DOI: 10.1016/j.envint.2018.01.019ISI: 000428976700013PubMedID: 29421399Scopus ID: 2-s2.0-85041677797OAI: oai:DiVA.org:oru-66468DiVA, id: diva2:1197612
Funder
Swedish Research Council Formas, 2007-2047, 942-2015-756, 216-2013-478Available from: 2018-04-13 Created: 2018-04-13 Last updated: 2018-07-26Bibliographically approved

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Salihovic, Samira

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