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The known knowns of microglia-neuronal signalling in neuropathic pain

Simon Beggs1, Michael W Salter

  • 1Program in Neurosciences & Mental Health, Hospital for Sick Children, Toronto, ON M5G 1X8, Canada.

Neuroscience Letters
|September 3, 2013
PubMed

Insights

Reactive microglia in the spinal cord drive neuropathic pain via P2X4 receptors. Targeting these pathways offers new strategies for treating pain hypersensitivity after nerve damage.

Area of Science:

  • Neuroscience
  • Immunology
  • Pain Research

Background:

  • Microglia are crucial for spinal cord plasticity, contributing to pain hypersensitivity after peripheral nerve injury.
  • A specific reactive microglial phenotype involves increased expression of purinergic P2X4 receptors.

Purpose of the Study:

  • To review recent advancements in understanding molecules that regulate the microglial-neuronal signaling pathway.
  • To identify opportunities for therapeutic targeting of key signaling hubs in neuropathic pain.

Main Methods:

  • Literature review of recent research on microglial function in neuropathic pain.
  • Analysis of signaling pathways involving purinergic P2X4 receptors and neuronal disinhibition.

Main Results:

  • Purinergic P2X4 receptor activation in microglia initiates a signaling cascade.
  • This cascade leads to disinhibition of dorsal horn neurons, altering pain signal transmission to the brain.

Conclusions:

  • Microglia-derived purinergic signaling is central to neuropathic pain mechanisms.
  • Targeting specific molecules within this pathway presents potential therapeutic avenues for treating neuropathic pain.
Keywords:
BDNFMicrogliaP2X4Spinal cord

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