title: Low-dose food contaminants trigger sex-specific, hepatic metabolic changes in the progeny of obese mice.
abstract: Environmental contaminants are suspected to be involved in the epidemic incidence of metabolic disorders, food ingestion being a primarily route of exposure. We hypothesized that life-long consumption of a high-fat diet that contains low doses of pollutants will aggravate metabolic disorders induced by obesity itself. Mice were challenged from preconception throughout life with a high-fat diet containing pollutants commonly present in food (2,3,7,8-tetrachlorodibenzo-p-dioxin, polychlorinated biphenyl 153, diethylhexyl phthalate, and bisphenol A), added at low doses in the tolerable daily intake range. We measured several blood parameters, glucose and insulin tolerance, hepatic lipid accumulation, and gene expression in adult mice. Pollutant-exposed mice exhibited significant sex-dependent metabolic disorders in the absence of toxicity and weight gain. In males, pollutants increased the expression of hepatic genes (from 36 to 88%) encoding proteins related to cholesterol biosynthesis and decreased (40%) hepatic total cholesterol levels. In females, there was a marked deterioration of glucose tolerance, which may be related to the 2-fold induction of estrogen sulfotransferase and reduced expression of estrogen receptor α (25%) and estrogen target genes (>34%). Because of the very low doses of pollutants used in the mixture, these findings may have strong implications in terms of understanding the potential role of environmental contaminants in food in the development of metabolic diseases.
authors.affiliation: Institut National de la Santé et de la Recherche Médicale (INSERM), U1060, Cardiovasculaire, Métabolisme, Diabétologie, et Nutrition (CarMeN) Laboratory, Oullins, France.
authors.forename: Danielle
authors.initials: D
authors.lastname: Naville
authors.forename: Claudie
authors.initials: C
authors.lastname: Pinteur
authors.forename: Nathalie
authors.initials: N
authors.lastname: Vega
authors.forename: Yoan
authors.initials: Y
authors.lastname: Menade
authors.forename: Michèle
authors.initials: M
authors.lastname: Vigier
authors.forename: Alexandre
authors.initials: A
authors.lastname: Le Bourdais
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Labaronne
authors.forename: Cyrille
authors.initials: C
authors.lastname: Debard
authors.forename: Céline
authors.initials: C
authors.lastname: Luquain-Costaz
authors.forename: Martine
authors.initials: M
authors.lastname: Bégeot
authors.forename: Hubert
authors.initials: H
authors.lastname: Vidal
authors.forename: Brigitte
authors.initials: B
authors.lastname: Le Magueresse-Battistoni
mesh_terms: D000818:Animals; D001559:Benzhydryl Compounds / Q000633:toxicity; D015153:Blotting, Western; D001835:Body Weight / Q000187:drug effects; D005260:Female; D008099:Liver / Q000187:drug effects* / Q000378:metabolism*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008820:Mice, Obese; D010636:Phenols / Q000633:toxicity; D011078:Polychlorinated Biphenyls / Q000633:toxicity; D000072317:Polychlorinated Dibenzodioxins / Q000633:toxicity; D020133:Reverse Transcriptase Polymerase Chain Reaction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D010636:Phenols; D011078:Polychlorinated Biphenyls; D000072317:Polychlorinated Dibenzodioxins; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: BPA; DEHP; cholesterol biosynthesis; estrogen sulfotransferase; persistent organic pollutant