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Neural Plast. 2013;2013:753656. doi: 10.1155/2013/753656. Epub 2013 Aug 18.

Microglia and spinal cord synaptic plasticity in persistent pain.

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1
Pain Signaling and Plasticity Laboratory, Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710, USA.

Abstract

Microglia are regarded as macrophages in the central nervous system (CNS) and play an important role in neuroinflammation in the CNS. Microglial activation has been strongly implicated in neurodegeneration in the brain. Increasing evidence also suggests an important role of spinal cord microglia in the genesis of persistent pain, by releasing the proinflammatory cytokines tumor necrosis factor-alpha (TNFα), Interleukine-1beta (IL-1β), and brain derived neurotrophic factor (BDNF). In this review, we discuss the recent findings illustrating the importance of microglial mediators in regulating synaptic plasticity of the excitatory and inhibitory pain circuits in the spinal cord, leading to enhanced pain states. Insights into microglial-neuronal interactions in the spinal cord dorsal horn will not only further our understanding of neural plasticity but may also lead to novel therapeutics for chronic pain management.

PMID:
24024042
PMCID:
PMC3759269
DOI:
10.1155/2013/753656
[Indexed for MEDLINE]
Free PMC Article
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