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Neuropharmacology. 2014 May;80:3-17. doi: 10.1016/j.neuropharm.2014.01.001. Epub 2014 Jan 10.

Transcriptional and epigenetic regulation of Hebbian and non-Hebbian plasticity.

Author information

1
Department of Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA.
2
Department of Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA. Electronic address: dsweatt@uab.edu.

Abstract

The epigenome is uniquely positioned as a point of convergence, integrating multiple intracellular signaling cascades into a cohesive gene expression profile necessary for long-term behavioral change. The last decade of neuroepigenetic research has primarily focused on learning-induced changes in DNA methylation and chromatin modifications. Numerous studies have independently demonstrated the importance of epigenetic modifications in memory formation and retention as well as Hebbian plasticity. However, how these mechanisms operate in the context of other forms of plasticity is largely unknown. In this review, we examine evidence for epigenetic regulation of Hebbian plasticity. We then discuss how non-Hebbian forms of plasticity, such as intrinsic plasticity and synaptic scaling, may also be involved in producing the cellular adaptations necessary for learning-related behavioral change. Furthermore, we consider the likely roles for transcriptional and epigenetic mechanisms in the regulation of these plasticities. In doing so, we aim to expand upon the idea that epigenetic mechanisms are critical regulators of both Hebbian and non-Hebbian forms of plasticity that ultimately drive learning and memory.

KEYWORDS:

DNA methylation; Epigenetics; Hebbian; Histone modifications; Homeostatic; Intrinsic; Metaplasticity; Non-Hebbian; Synaptic; Synaptic scaling

PMID:
24418102
PMCID:
PMC3984596
DOI:
10.1016/j.neuropharm.2014.01.001
[Indexed for MEDLINE]
Free PMC Article

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