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Mol Cell Endocrinol. 2015 Dec 15;418 Pt 1:3-8. doi: 10.1016/j.mce.2015.09.019. Epub 2015 Sep 26.

Brain lipid sensing and the neural control of energy balance.

Author information

1
Univ Paris Diderot, Sorbonne Paris Cité, CNRS UMR 8251, F-75205, Paris, France. Electronic address: christophe.magnan@univ-paris-diderot.fr.
2
Neurology Service, VA Medical Center, East Orange, NJ, USA; Department of Neurology, Rutgers, NJ Medical School, Newark, NJ, USA.
3
Univ Paris Diderot, Sorbonne Paris Cité, CNRS UMR 8251, F-75205, Paris, France.

Abstract

Fatty acid (FA) -sensitive neurons are present in the brain, especially the hypothalamus, and play a key role in the neural control of energy and glucose homeostasis including feeding behavior, secretion insulin and action. Subpopulations of neurons in the arcuate and ventromedial hypothalamic nuclei are selectively either activated or inhibited by FA. Molecular effectors of these FA effects include ion channels such as chloride, potassium or calcium. In addition, at least half of the responses in the hypothalamic ventromedial FA neurons are mediated through interaction with the FA translocator/receptor, FAT/CD36, that does not require metabolism to activate intracellular signaling downstream. Recently, an important role of lipoprotein lipase in FA detection has also been demonstrated not only in the hypothalamus, but also in the hippocampus and striatum. Finally, FA could overload energy homeostasis via increased hypothalamic ceramide synthesis which could, in turn, contribute to the pathogenesis of diabetes of obesity and/or type 2 in predisposed individuals by disrupting the endocrine signaling pathways of insulin and/or leptin.

KEYWORDS:

Ceramides; Energy balance; FAT/CD36; Hypothalamus; Ion channels; Lipoprotein lipase

PMID:
26415589
DOI:
10.1016/j.mce.2015.09.019
[Indexed for MEDLINE]

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