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Related Experiment Videos

Voltage-gated sodium channels and hyperalgesia.

Josephine Lai1, Frank Porreca, John C Hunter

  • 1Departments of Pharmacology, University of Arizona Health Sciences Center, Tucson, Arizona 85724, USA. lai@u.arizona.edu

Annual Review of Pharmacology and Toxicology
|January 28, 2004
PubMed
Summary

Voltage-gated sodium channels (VGSCs) are crucial in chronic pain by affecting neuronal excitability. Targeting specific channels like NaV1.8 in peripheral nerves offers a promising strategy for effective pain relief with improved safety.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Pain Research

Background:

  • Voltage-gated sodium channels (VGSCs) are essential for neuronal excitability in the central and peripheral nervous systems.
  • Dysfunction and hyperexcitability of neurons are linked to various chronic pain syndromes.
  • Use-dependent sodium channel blockers are established treatments for numerous chronic pain conditions.

Purpose of the Study:

  • To review the role of VGSCs in the hyperexcitability of sensory primary afferent neurons.
  • To examine the contribution of VGSCs to inflammatory and neuropathic pain states.
  • To explore the potential of targeting specific VGSCs for novel pain therapeutics.

Main Methods:

  • Review of physiological and pharmacological evidence.
  • Analysis of the role of neuronal hyperexcitability in pain.

Related Experiment Videos

  • Focus on tetrodotoxin (TTX)-resistant sodium channels, specifically NaV1.8.

    • Main Results:

    • VGSCs play a critical role in the neuronal hyperexcitability underlying chronic pain.
    • Alterations in VGSC function are closely associated with pain states.
    • Tetrodotoxin (TTX)-resistant channels, particularly NaV1.8, are localized in peripheral nerves.

    Conclusions:

    • Targeting VGSCs, especially NaV1.8 in peripheral nerves, presents a novel therapeutic strategy.
    • Development of drugs targeting these specific channels could lead to effective pain relief.
    • This approach may offer an improved safety profile compared to current pain medications.