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Sensory Pathway Modulation by Calcium Channel α2δ1 Subunit

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Modulation of Presynaptic Calcium Channels

Abstract

Voltage-gated calcium channels (VGCC) are importantly involved in modulation of pathophysiological functions, including the transduction of nociceptive and non-nociceptive signals. As an auxiliary subunit of VGCC, the α2δ (Cavα2δ) subunit plays critical roles in modulating VGCC expression and functions such as regulations of VGCC trafficking, kinetics of voltage-dependent activation and inactivation. Cavα2δ also modulates neuronal and synaptic functions through both VGCC-dependent and independent mechanisms. Among Cavα2δ1–4 subunits, Cavα2δ1 subunit is implicated in pain processing because (1) its upregulation in neuropathic pain models is shown to play a critical role in the onset and maintenance of pain states; (2) its upregulation in sensory neurons leads to dorsal spinal cord neuron sensitization; (3) it is the receptor for gabapentinoids that can normalize activity of sensitized dorsal spinal cord neurons, and have anti-neuropathic pain properties in animal models and patients. In this chapter, we briefly review the regulation of Cavα2δ and its functional contribution to pathophysiological conditions with a main focus on pain transduction and processing. Underlying mechanisms related to Cavα2δ1 contributions to pain processing and the therapeutic effects of gabapentinoids are also discussed.

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Acknowledgements

This work was partially supported by NIH grants (NS064341 and DE021847) to ZD Luo.

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Zhou, C., Luo, Z.D. (2013). Sensory Pathway Modulation by Calcium Channel α2δ1 Subunit. In: Stephens, G., Mochida, S. (eds) Modulation of Presynaptic Calcium Channels. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6334-0_15

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