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Merrill AK, Anderson T, Conrad K, et al. Protracted Impairment of Maternal Metabolic Health in Mouse Dams Following Pregnancy Exposure to a Mixture of Low Dose Endocrine-Disrupting Chemicals, a Pilot Study. Toxics. 2021;9(12)doi: 10.3390/toxics9120346.
Merrill, A. K., Anderson, T., Conrad, K., Marvin, E., James-Todd, T., Cory-Slechta, D. A., & Sobolewski, M. (2021). Protracted Impairment of Maternal Metabolic Health in Mouse Dams Following Pregnancy Exposure to a Mixture of Low Dose Endocrine-Disrupting Chemicals, a Pilot Study. Toxics, 9(12), . https://doi.org/10.3390/toxics9120346
Merrill, Alyssa K, et al. "Protracted Impairment of Maternal Metabolic Health in Mouse Dams Following Pregnancy Exposure to a Mixture of Low Dose Endocrine-Disrupting Chemicals, a Pilot Study." Toxics vol. 9,12 (2021). doi: https://doi.org/10.3390/toxics9120346
Merrill AK, Anderson T, Conrad K, Marvin E, James-Todd T, Cory-Slechta DA, Sobolewski M. Protracted Impairment of Maternal Metabolic Health in Mouse Dams Following Pregnancy Exposure to a Mixture of Low Dose Endocrine-Disrupting Chemicals, a Pilot Study. Toxics. 2021 Dec 09;9(12). doi: 10.3390/toxics9120346. PMID: 34941779.
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Toxics. 2021 Dec 09;9(12). doi: 10.3390/toxics9120346.

Protracted Impairment of Maternal Metabolic Health in Mouse Dams Following Pregnancy Exposure to a Mixture of Low Dose Endocrine-Disrupting Chemicals, a Pilot Study.

Toxics

Alyssa K Merrill, Timothy Anderson, Katherine Conrad, Elena Marvin, Tamarra James-Todd, Deborah A Cory-Slechta, Marissa Sobolewski

Affiliations

  1. Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, NY 14642, USA.
  2. Department of Environmental Health, Harvard University, Boston, MA 02115, USA.

PMID: 34941779 DOI: 10.3390/toxics9120346

Abstract

Pregnancy, a period of increased metabolic demands coordinated by fluctuating steroid hormones, is an understudied critical window of disease susceptibility for later-life maternal metabolic health. Epidemiological studies have identified associations between exposures to various endocrine-disrupting chemicals (EDCs) with an increased risk for metabolic syndrome, obesity, and diabetes. Whether such adverse outcomes would be heightened by concurrent exposures to multiple EDCs during pregnancy, consistent with the reality that human exposures are to EDC mixtures, was examined in the current pilot study. Mouse dams were orally exposed to relatively low doses of four EDCs: (atrazine (10 mg/kg), bisphenol-A (50 µg/kg), perfluorooctanoic acid (0.1 mg/kg), 2,3,7,8-tetrachlorodibenzo-p-dioxin (0.036 µg/kg)), or the combination (MIX), from gestational day 7 until birth or for an equivalent 12 days in non-pregnant females. Glucose intolerance, serum lipids, weight, and visceral adiposity were assessed six months later. MIX-exposed dams exhibited hyperglycemia with a persistent elevation in blood glucose two hours after glucose administration in a glucose tolerance test, whereas no such effects were observed in MIX-exposed non-pregnant females. Correspondingly, MIX dams showed elevated serum low-density lipoprotein (LDL). There were no statistically significant differences in weight or visceral adipose; MIX dams showed an average visceral adipose volume to body volume ratio of 0.09, while the vehicle dams had an average ratio of 0.07. Collectively, these findings provide biological plausibility for the epidemiological associations observed between EDC exposures during pregnancy and subsequent maternal metabolic dyshomeostasis, and proof of concept data that highlight the importance of considering complex EDC mixtures based of off common health outcomes, e.g., for increased risk for later-life maternal metabolic effects following pregnancy.

Keywords: endocrine-disrupting chemicals; maternal health; pregnancy; type 2 diabetes

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