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Environ Toxicol Pharmacol. 2017 Dec;56:29-34. doi: 10.1016/j.etap.2017.08.030. Epub 2017 Sep 1.

BDE-47 and BDE-85 stimulate insulin secretion in INS-1 832/13 pancreatic β-cells through the thyroid receptor and Akt.

Author information

1
Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, 33612, United States.
2
Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, 33612, United States. Electronic address: eheart@health.usf.edu.

Abstract

PBDEs (polybrominated diphenyl ethers) are environmental pollutants that have been linked to the development of type 2 diabetes, however, the precise mechanisms are not clear. Particularly, their direct effect on insulin secretion is unknown. In this study, we show that two PBDE congeners, BDE-47 and BDE-85, potentiate glucose-stimulated insulin secretion (GSIS) in INS-1 832/13 cells. This effect of BDE-47 and BDE-85 on GSIS was dependent on thyroid receptor (TR). Both BDE-47 and BDE-85 (10μM) activated Akt during an acute exposure. The activation of Akt by BDE-47 and BDE-85 plays a role in their potentiation of GSIS, as pharmacological inhibition of PI3K, an upstream activator of Akt, significantly lowers GSIS compared to compounds alone. This study shows that BDE-47 and BDE-85 directly act on pancreatic β-cells to stimulate GSIS, and that this effect is mediated by the thyroid receptor (TR) and Akt activation.

KEYWORDS:

Akt; BDE-47; BDE-85; Glucose-stimulated insulin secretion; Thyroid hormone; Thyroid receptor

PMID:
28869857
DOI:
10.1016/j.etap.2017.08.030
[Indexed for MEDLINE]

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