P2X4 receptors and neuropathic pain

Research output: Contribution to journalReview article

62 Citations (Scopus)

Abstract

Neuropathic pain, a debilitating pain condition, is a common consequence of damage to the nervous system. Neuropathic pain is often resistant to currently available analgesics. A growing body of evidence indicates that spinal microglia react and undergo a series of changes that directly influence the establishment of neuropathic pain states. After nerve injury, P2X4 receptors (P2X4Rs) are upregulated in spinal microglia by several factors at the transcriptional and translational levels. Those include the CC chemokine CCL21 derived from damaged neurons, the extracellular matrix protein flbronectin in the spinal cord, and the transcription factor interferon regulatory factor 8 (IRF8) expressed in microglia. P2X4R expression in microglia is also regulated at the post-translational level by signaling from other cell-surface receptors such as CC chemokine receptor (CCR2). Importantly, inhibiting the function or expression of P2X4Rs and P2X4R-regulating molecules suppresses the aberrant excitability of dorsal horn neurons and neuropathic pain. These findings indicate that P2X4R-positive microglia are a central player in mechanisms for neuropathic pain. Thus, microglial P2X4Rs are a potential target for treating the chronic pain state.

Original languageEnglish
Article number191
JournalFrontiers in Cellular Neuroscience
Issue numberOCT
DOIs
Publication statusPublished - Oct 28 2013

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Purinergic P2X4 Receptors
Microglia
Neuralgia
Chemokine CCL21
CCR Receptors
Cord Factors
Posterior Horn Cells
CC Chemokines
Extracellular Matrix Proteins
Cell Surface Receptors
Chronic Pain
Nervous System
Analgesics
Spinal Cord
Transcription Factors
Neurons
Pain
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Cellular and Molecular Neuroscience

Cite this

P2X4 receptors and neuropathic pain. / Tsuda, Makoto; Masuda, Takahiro; Tozaki-Saitoh, Hidetoshi; Inoue, Kazuhide.

In: Frontiers in Cellular Neuroscience, No. OCT, 191, 28.10.2013.

Research output: Contribution to journalReview article

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