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Calcium-activated chloride current expression in axotomized sensory neurons: what for?

Mathieu Boudes1, Frédérique Scamps

  • 1INSERM U-1051, Sensory Diseases, Neuro-plasticity and Therapy, Institut des Neurosciences de Montpellier Montpellier, France.

Frontiers in Molecular Neuroscience
|March 31, 2012
PubMed

Insights

Peripheral nerve injury affects sensory neurons by altering calcium-activated chloride currents (CaCCs). Best1 and Tmem16a are key genes involved in CaCC expression and function, influencing nerve regeneration and pain signaling.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Calcium-activated chloride currents (CaCCs) play roles in neuronal function.
  • Peripheral nerve injury is a significant clinical issue impacting sensory neurons.

Purpose of the Study:

  • To investigate the role and molecular identity of CaCCs in sensory neurons following peripheral nerve injury.
  • To understand how CaCCs contribute to neuronal electrical activity and neurite regeneration.

Main Methods:

  • Primary culture of adult sensory neurons.
  • Functional screening of candidate genes (Best1, Tmem16a).
  • Analysis of CaCC expression and activity in axotomized neurons and nociceptors.

Main Results:

  • Peripheral nerve injury induces CaCCs in mechano- and proprioceptors, mediated by Best1, promoting electrical silencing for growth.
  • Tmem16a mediates CaCC activation in nociceptors by inflammatory mediators, contributing to pain signaling.
  • CaCC expression correlates with regenerative neurite growth in sensory neurons.

Conclusions:

  • Best1 and Tmem16a are critical regulators of CaCCs in distinct sensory neuron populations after injury.
  • CaCCs have dual roles: promoting regeneration in some neurons and contributing to pain in others.
  • Further research is needed to elucidate CaCC regulatory mechanisms during neurite regeneration.
Keywords:
CaCCDRGaxotomybestrophinelectrical activitymembrane tensionregeneration

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