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Abstract Title:

Effects of Bisphenol A on glucose homeostasis and brain insulin signaling pathways in male mice.

Abstract Source:

Gen Comp Endocrinol. 2015 Feb 1 ;212:44-50. Epub 2015 Jan 28. PMID: 25637671

Abstract Author(s):

Fangfang Fang, Donglong Chen, Pan Yu, Wenyi Qian, Jing Zhou, Jingli Liu, Rong Gao, Jun Wang, Hang Xiao

Article Affiliation:

Fangfang Fang

Abstract:

The potential effects of Bisphenol A (BPA) on peripheral insulin resistance have recently gained more attention, however, its functions on brain insulin resistance are still unknown. The aim of the present study was to investigate the effects of BPA on insulin signaling and glucose transport in mouse brain. The male mice were administrated of 100μg/kg/day BPA or vehicle for 15 days then challenged with glucose and insulin tolerance tests. The insulin levels were detected with radioimmunoassay (RIA), and the insulin signaling pathways were investigated by Western blot. Our results revealed that BPA significantly increased peripheral plasmainsulin levels, and decreased the insulin signals including phosphorylated insulin receptor (p-IR), phosphorylated insulin receptor substrate 1 (p-IRS1), phosphorylated protein kinase B (p-AKT), phosphorylated glycogen synthase kinase 3β (p-GSK3β) and phosphorylated extracellular regulated proteinkinases (p-ERK1/2) in the brain, though insulin expression in both hippocampus and profrontal cortex was increased. In parallel, BPA exposure might contribute to glucose transport disturbance in the brain since the expression of glucose transporters were markedly decreased. In conclusion, BPA exposure perturbs the insulin signaling and glucose transport in the brain, therefore, it might be a risk factor for brain insulin resistance.

Study Type : Animal Study

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Sayer Ji
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