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Article Publish Status: FREE
Abstract Title:

Bisphenol A Exposure May Induce Hepatic Lipid Accumulation via Reprogramming the DNA Methylation Patterns of Genes Involved in Lipid Metabolism.

Abstract Source:

Sci Rep. 2016 ;6:31331. Epub 2016 Aug 9. PMID: 27502578

Abstract Author(s):

Zhang-Hong Ke, Jie-Xue Pan, Lu-Yang Jin, Hai-Yan Xu, Tian-Tian Yu, Kamran Ullah, Tanzil Ur Rahman, Jun Ren, Yi Cheng, Xin-Yan Dong, Jian-Zhong Sheng, He-Feng Huang

Article Affiliation:

Zhang-Hong Ke

Abstract:

Accumulating evidence suggests a role of bisphenol A (BPA) in metabolic disorders. However, the underlying mechanism is still unclear. Using a mouse BPA exposure model, we investigated the effects of long-term BPA exposure on lipid metabolism and the underlying mechanisms. The male mice exposed to BPA (0.5 μg BPA /kg/day, a human relevant dose) for 10 months exhibited significant hepatic accumulation of triglycerides and cholesterol. The liver cells from the BPA-exposed mice showed significantly increased expression levels of the genes related to lipid synthesis. These liver cells showed decreasedDNA methylation levels of Srebf1 and Srebf2, and increased expression levels of Srebf1 and Srebf2 that may upregulate the genes related to lipid synthesis. The expression levels of DNA methyltransferases were decreased in BPA-exposed mouse liver. Hepa1-6 cell line treated with BPA showed decreasedexpression levels of DNA methyltransferases and increased expression levels of genes involved in lipid synthesis. DNA methyltransferase knockdown in Hepa1-6 led to hypo-methylation and increased expression levels of genes involved in lipid synthesis. Our results suggest that long-term BPA exposure could induce hepatic lipid accumulation, which may be due to the epigenetic reprogramming of the genes involved in lipid metabolism, such as the alterations of DNA methylation patterns.

Study Type : Animal Study

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Sayer Ji
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