Abstract
Genome-wide DNA methylation patterns significantly change during brain development and maturation and are the basis for neuronal plasticity. Widespread methylome reconfiguration, such as non-CG methylation (mCH), occurs in neurons, but not in glial cells, during fetal to young adult development and becomes the dominant form of methylation in the human neuronal genome. In parallel, during brain development, there is an increase of 5hmC marks and possibly CpG demethylation in particular at gene bodies.
Rapid and dynamic methylation and demethylation of specific genes in the brain may play a fundamental role in learning, memory formation, and behavioral plasticity. MeCP2 is the best-characterized methyl-binding transcription factor and is involved both in gene activation and repression. MeCP2 is highly expressed in the brain and an important component of neuronal chromatin, where it reduces – via replacing the linker histone H1 – the chromatin repeat length to 165 bp. Mutations in the MECP2 gene are the mechanistic basis of the autism spectrum disorder Rett syndrome. In addition, also the histone acetylation level in neurons contributes to the cell’s proper function. Accordingly, KDAC inhibitors offer an effective therapy in neurodegenerative diseases, such as Rubinstein-Taybi syndrome, Friedreich ataxia and Huntington disease, in which the homeostasis of this epigenetic mark is disturbed. The transcription factor REST (RE1-silencing transcription factor) acts as DNA-binding platform for a large number of chromatin modifiers, such as KDACs, KMTs and KDMs, and primarily mediates silencing of its neuronal target genes. Dys-regulation of REST provides insight into epigenetic processes in the context of Alzheimer and Huntington diseases.
In this chapter, we will describe the field of neuroepigenetics and will provide mechanistic explanations for the contribution of epigenetics to neurodevelopmental and neurodegenerative diseases.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Additional Reading
Ausio J, Martinez de Paz A, Esteller M (2014) MeCP2: the long trip from a chromatin protein to neurological disorders. Trends Mol Med 20:487–498
Gräff J, Tsai LH (2013) Histone acetylation: molecular mnemonics on the chromatin. Nat Rev Neurosci 14:97–111
Hwang JY, Aromolaran KA, Zukin RS (2017) The emerging field of epigenetics in neurodegeneration and neuroprotection. Nat Rev Neurosci 18:347–361
Kazantsev AG, Thompson LM (2008) Therapeutic application of histone deacetylase inhibitors for central nervous system disorders. Nat Rev Drug Discov 7:854–868
Klein HU, De Jager PL (2016) Uncovering the role of the methylome in dementia and neurodegeneration. Trends Mol Med 22:687–700
Lister R, Mukamel EA, Nery JR et al (2013) Global epigenomic reconfiguration during mammalian brain development. Science 341:1237905
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this chapter
Cite this chapter
Carlberg, C., Molnár, F. (2018). Neuroepigenetics. In: Human Epigenomics. Springer, Singapore. https://doi.org/10.1007/978-981-10-7614-5_11
Download citation
DOI: https://doi.org/10.1007/978-981-10-7614-5_11
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-10-7613-8
Online ISBN: 978-981-10-7614-5
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)