The Calcium Channel alpha 2 delta 1 Subunit: Interactional Targets in Primary Sensory Neurons and Role in Neuropathic Pain
FRONTIERS IN CELLULAR NEUROSCIENCE(2021)
Abstract
Neuropathic pain is mainly triggered after nerve injury and associated with plasticity of the nociceptive pathway in primary sensory neurons. Currently, the treatment remains a challenge. In order to identify specific therapeutic targets, it is necessary to clarify the underlying mechanisms of neuropathic pain. It is well established that primary sensory neuron sensitization (peripheral sensitization) is one of the main components of neuropathic pain. Calcium channels act as key mediators in peripheral sensitization. As the target of gabapentin, the calcium channel subunit alpha 2 delta 1 (Cav alpha 2 delta 1) is a potential entry point in neuropathic pain research. Numerous studies have demonstrated that the upstream and downstream targets of Cav alpha 2 delta 1 of the peripheral primary neurons, including thrombospondins, N-methyl-D-aspartate receptors, transient receptor potential ankyrin 1 (TRPA1), transient receptor potential vanilloid family 1 (TRPV1), and protein kinase C (PKC), are involved in neuropathic pain. Thus, we reviewed and discussed the role of Cav alpha 2 delta 1 and the associated signaling axis in neuropathic pain conditions.
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Key words
neuropathic pain, primary sensory neuron, Cav alpha 2 delta 1, molecular target, peripheral sensitization
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