The role of epigenetics in hypothalamic energy balance control: implications for obesity

Authors:

Arnaud Obri1 and Marc Claret1,2

Affiliations:

1 Neuronal Control of Metabolism Laboratory, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.

2 Centro de Investigación Biomédica en Red (CIBER) de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 08036 Barcelona, Spain.

Keywords: 

obesity, hypothalamus, epigenetic, energy balance, AgRP neurons, POMC neurons.

Abbreviatons:

5-mC – 5-methylcytosine,

α-MSH – α-melanocyte-stimulating hormone,

AgRP – agouti-related protein,

AMPK – AMP-activated protein kinase,

ARC – arcuate nucleus,

DNMT – DNA methyltransferases,

GABA – γ-aminobutyric acid,

GWAS – genome-wide association studies,

HAT – histone acetyltransferase,

HDAC – histone deacetylase,

LH – lateral hypothalamus,

lncRNA – long ncRNA,

MCR – melanocortin receptor,

miRNA – micro RNA,

mRNA – messenger RNA,

ncRNA – non-coding RNA,

NPY – neuropeptide Y,

POMC – pro-opimelanocortin,

PTM – post-translational modification,

PVN – paraventricular nucleus,

snoRNA – small nucleolar RNA,

snRNA – small nuclear RNA,

T2D – type 2 diabetes,

VMH – ventromedial hypothalamus.

Corresponding Author(s):

Arnaud Obri, Neuronal Control of Metabolism Laboratory, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), C/ Rosselló 149-153, 5th floor, 08036 Barcelona, Spain, Tel: +34932275707 ext 2910; obri@clinic.cat

Conflict of interest statement:

The authors declare no competing interests.

Please cite this article as:

Arnaud Obri and Marc Claret (2019). The role of epige-netics in hypothalamic energy balance control: implications for obesity. Cell Stress 3(7): 208-220. doi: 10.15698/cst2019.07.191

© 2019 Obri and Claret. This is an open-access article released under the terms of the Creative Commons Attribution (CC BY) license, which allows the unrestricted use, distribution, and reproduc-tion in any medium, provided the original author and source are acknowledged.

Abstract:

Despite enormous social and scientific efforts, obesity rates continue to increase worldwide. While genetic factors contribute to obesity development, genetics alone cannot explain the current epidemic. Obesity is essentially the consequence of complex genetic-environmental interactions. Evidence suggests that contemporary lifestyles trigger epigenetic changes, which can dysregulate energy balance and thus contribute to obesity. The hypothalamus plays a pivotal role in the regulation of body weight, through a sophisticated network of neuronal systems. Alterations in the activity of these neuronal pathways have been implicated in the pathophysiology of obesity. Here, we review the current knowledge on the central control of energy balance with a focus on recent studies linking epigenetic mechanisms in the hypothalamus to the development of obesity and metabolic disorders.