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Hepatic Lipid Accumulation and Nrf2 Expression following Perinatal and Peripubertal Exposure to Bisphenol A in a Mouse Model of Nonalcoholic Liver Disease.
Shimpi, Prajakta C; More, Vijay R; Paranjpe, Maneesha; Donepudi, Ajay C; Goodrich, Jaclyn M; Dolinoy, Dana C; Rubin, Beverly; Slitt, Angela L.
Afiliación
  • Shimpi PC; Biomedical and Pharmaceutical Sciences, University of Rhode Island , Kingston, Rhode Island, USA.
  • More VR; Biomedical and Pharmaceutical Sciences, University of Rhode Island , Kingston, Rhode Island, USA.
  • Paranjpe M; Sackler School of Graduate Biomedical Sciences, Tufts University , Boston, Massachusetts, USA.
  • Donepudi AC; Biomedical and Pharmaceutical Sciences, University of Rhode Island , Kingston, Rhode Island, USA.
  • Goodrich JM; Department of Environmental Health Sciences, University of Michigan School of Public Health , Ann Arbor, Michigan, USA.
  • Dolinoy DC; Department of Environmental Health Sciences, University of Michigan School of Public Health , Ann Arbor, Michigan, USA.
  • Rubin B; Sackler School of Graduate Biomedical Sciences, Tufts University , Boston, Massachusetts, USA.
  • Slitt AL; Biomedical and Pharmaceutical Sciences, University of Rhode Island , Kingston, Rhode Island, USA.
Environ Health Perspect ; 125(8): 087005, 2017 08 04.
Article en En | MEDLINE | ID: mdl-28796629
BACKGROUND: Exposure to chemicals during critical windows of development may re-program liver for increased risk of nonalcoholic fatty liver disease (NAFLD). Bisphenol A (BPA), a plastics component, has been described to impart adverse effects during gestational and lactational exposure. Our work has pointed to nuclear factor E2-related factor 2 (Nrf2) being a modulator of hepatic lipid accumulation in models of NAFLD. OBJECTIVES: To determine if chemical exposure can prime liver for steatosis via modulation of NRF2 and epigenetic mechanisms. METHODS: Utilizing BPA as a model exposure, pregnant CD-1 mice were administered 25µg/kg/day BPA via osmotic minipumps from gestational day 8 through postnatal day (PND)16. The offspring were weaned on PND21 and exposed to same dose of BPA via their drinking water through PND35. Tissues were collected from pups at week 5 (W5), and their littermates at week 39 (W39). RESULTS: BPA increased hepatic lipid content concomitant with increased Nrf2 and pro-lipogenic enzyme expression at W5 and W39 in female offspring. BPA exposure increased Nrf2 binding to a putative antioxidant response element consensus sequence in the sterol regulatory-element binding protein-1c (Srebp-1c) promoter. Known Nrf2 activators increased SREBP-1C promoter reporter activity in HepG2 cells. Methylated DNA immunoprecipitation-PCR and pyrosequencing revealed that developmental BPA exposure induced hypomethylation of the Nrf2 and Srebp-1c promoters in livers of W5 mice, which was more prominent in W39 mice than in others. CONCLUSION: Exposure to a xenobiotic during early development induced persistent fat accumulation via hypomethylation of lipogenic genes. Moreover, increased Nrf2 recruitment to the Srebp-1c promoter in livers of BPA-exposed mice was observed. Overall, the underlying mechanisms described a broader impact beyond BPA exposure and can be applied to understand other models of NAFLD. https://doi.org/10.1289/EHP664.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fenoles / Efectos Tardíos de la Exposición Prenatal / Compuestos de Bencidrilo / Epigénesis Genética / Contaminantes Ambientales / Proteína 1 de Unión a los Elementos Reguladores de Esteroles / Factor 2 Relacionado con NF-E2 / Enfermedad del Hígado Graso no Alcohólico Tipo de estudio: Prognostic_studies Límite: Animals / Female / Humans / Male / Pregnancy Idioma: En Revista: Environ Health Perspect Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fenoles / Efectos Tardíos de la Exposición Prenatal / Compuestos de Bencidrilo / Epigénesis Genética / Contaminantes Ambientales / Proteína 1 de Unión a los Elementos Reguladores de Esteroles / Factor 2 Relacionado con NF-E2 / Enfermedad del Hígado Graso no Alcohólico Tipo de estudio: Prognostic_studies Límite: Animals / Female / Humans / Male / Pregnancy Idioma: En Revista: Environ Health Perspect Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos