Dataset Information

Possible Obesogenic Effects of Bisphenols Accumulation in the Human Brain.

ABSTRACT: Evidence of bisphenols' obesogenic effects on humans is mixed and inconsistent. We aimed to explore the presence of bisphenol A (BPA), bisphenol F (BPF) and chlorinated BPA (ClBPA), collectively called the bisphenols, in different brain regions and their association with obesity using post-mortem hypothalamic and white matter brain material from twelve pairs of obese (body mass index (BMI) >30?kg/m2) and normal-weight individuals (BMI <25?kg/m2). Mean ratios of hypothalamus:white matter for BPA, BPF and ClBPA were 1.5, 0.92, 0.95, respectively, suggesting no preferential accumulation of the bisphenols in the grey matter (hypothalamic) or white matter-enriched brain areas. We observed differences in hypothalamic concentrations among the bisphenols, with highest median level detected for ClBPA (median: 2.4?ng/g), followed by BPF (2.2?ng/g) and BPA (1.2?ng/g); similar ranking was observed for the white matter samples (median for: ClBPA-2.5?ng/g, BPF-2.3?ng/g, and BPA-1.0?ng/g). Furthermore, all bisphenol concentrations, except for white-matter BPF were associated with obesity (p?

SUBMITTER: Charisiadis P

PROVIDER: S-EPMC5974368 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Possible Obesogenic Effects of Bisphenols Accumulation in the Human Brain.

Charisiadis Pantelis P Andrianou Xanthi D XD van der Meer Thomas P TP den Dunnen Wilfred F A WFA Swaab Dick F DF Wolffenbuttel Bruce H R BHR Makris Konstantinos C KC van Vliet-Ostaptchouk Jana V JV

Scientific reports 20180529 1

Evidence of bisphenols' obesogenic effects on humans is mixed and inconsistent. We aimed to explore the presence of bisphenol A (BPA), bisphenol F (BPF) and chlorinated BPA (ClBPA), collectively called the bisphenols, in different brain regions and their association with obesity using post-mortem hypothalamic and white matter brain material from twelve pairs of obese (body mass index (BMI) >30 kg/m<sup>2</sup>) and normal-weight individuals (BMI <25 kg/m<sup>2</sup>). Mean ratios of hypothalamus ...[more]

PMID: 29844501

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Project description:Receptor for activated C kinase 1 (RACK1) has an important role in immune activation, and is regulated through a balance between glucocorticoid and androgen levels. We have previously demonstrated that RACK1 expression can serve as a marker for evaluation of immunotoxic profiles of hormone-active substances, such as endocrine-disrupting chemicals (EDCs). In this study, we investigated the effects of three bisphenols (BPA, BPAF, BPS) on RACK1 expression and on the innate immune responses in the THP-1 human promyelocytic cell line, a validated model for this investigation. BPA and BPAF reduced RACK1 promoter transcriptional activity, mRNA expression, and protein levels. However, BPS had the opposite effect. As expected, these results on RACK1 were paralleled by lipopolysaccharide (LPS)-induced interleukin-8 (IL-8) and tumor necrosis factor-α (TNFα) production. Since BPA and BPAF induced RACK1 expression in the presence of glucocorticoid receptor (GR) antagonist mifepristone, a role of G-protein-coupled estrogen receptor (GPER) has been considered due to their known estrogenic profile. Therefore, additional molecular effects of BPA and BPAF were unmasked after treatment with different inhibitors of well-known pivotal players of GPER-mediated signaling. BPA exerted its effects on RACK1 via NF-κB, as shown using the NF-κB inhibitor BAY11-7085 and NF-κB-specific luciferase reporter assay. Conversely, BPAF induced RACK1 up-regulation via androgen receptor (AR) activation, as confirmed by treatment with AR antagonist flutamide. Indeed, a biased agonism profile for BPA and BPAF for GPER was suggested based on their different binding modes revealed by our molecular docking. Altogether, our data suggest that RACK1 could represent an important target of EDCs and serves as a screening tool for their immunotoxic potential. Furthermore, RACK1 can be exploited to unmask multiple molecular interactions of hormone-active substances to better dissect out their mechanisms of action.

Dataset Information

Possible Obesogenic Effects of Bisphenols Accumulation in the Human Brain.

Publications

Possible Obesogenic Effects of Bisphenols Accumulation in the Human Brain.

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