Transient Receptor Potential (TRP) Ion Channels in Orofacial Pain

Molecular Neurobiology (2021)Cite this article

Abstract

Orofacial pain, including temporomandibular joint disorders pain, trigeminal neuralgia, dental pain, and debilitating headaches, affects millions of Americans each year with significant population health impact. Despite the existence of a large body of information on the subject, the molecular underpinnings of orofacial pain remain elusive. Two decades of research has identified that transient receptor potential (TRP) ion channels play a crucial role in pathological pain. A number of TRP ion channels are clearly expressed in the trigeminal sensory system and have critical functions in the transduction and pathogenesis of orofacial pain. Although there are many similarities, the orofacial sensory system shows some distinct peripheral and central pain processing and different sensitivities from the spinal sensory system. Relative to the extensive review on TRPs in spinally-mediated pain, the summary of TRPs in trigeminally-mediated pain has not been well-documented. This review focuses on the current experimental evidence involving TRP ion channels, particularly TRPV1, TRPA1, TRPV4, and TRPM8 in orofacial pain, and discusses their possible cellular and molecular mechanisms.

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Data Availability

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Acknowledgments

The authors acknowledge the support by the National Institutes of Health Grant DE027454 to YC.

Funding

This work was supported by the National Institutes of Health Grant DE027454 to YC.

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Affiliations

  1. Department of Neurology, Duke University, Durham, NC, 27710, USA

    Yuhui Luo, Abbie Suttle, Qiaojuan Zhang, Peng Wang & Yong Chen

  2. Department of Pathology, Duke University, Durham, NC, 27710, USA

    Yong Chen

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YHL and YC conceived the original idea and designed the outlines of the study. YHL, AS, QJZ, PW, and YC performed the literature review and wrote the draft of the manuscript. YHL and YC prepared the figures and tables for the manuscript. All authors have read and agreed to the final version of the manuscript.

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Luo, Y., Suttle, A., Zhang, Q. et al. Transient Receptor Potential (TRP) Ion Channels in Orofacial Pain. Mol Neurobiol (2021). https://doi.org/10.1007/s12035-021-02284-2

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Keywords

  • TRP ion channels
  • Temporomandibular joint pain
  • Trigeminal neuropathic pain
  • Dental pain
  • Trigeminal ganglion sensory neurons