A novel approach for detection of functional expression of TRPV1 channels on regenerated neurons following nerve injury
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- Zakir Hossain M.
- Department of Oral Physiology, School of Dentistry, Matsumoto Dental University
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- Masuda Yuji
- Institute for Oral Science, Matsumoto Dental University
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- Kitagawa Junichi
- Department of Oral Physiology, School of Dentistry, Matsumoto Dental University
Abstract
<p>Transient receptor potential vanilloid 1 (TRPV1) is a polymodal receptor channel, which plays an important role in pain transduction. It is important to understand the functional expression of this channel under neuropathic pain (NP) conditions. A novel method was used to investigate the dynamics of functional expression of this channel on regenerated neurons under NP conditions following trigeminal nerve injury using a combination of a permanently charged sodium channel blocker (QX-314) and a TRPV1 agonist (capsaicin; QX-CAP). The combination was originally introduced as a local anesthetic. Synchronization between the local anesthetic effect of QX-CAP and TRPV1 expression on regenerated neurons was observed following the nerve injury. QX-CAP had no local anesthetic effect under NP conditions 2 weeks after the injury when TRPV1 expression on regenerated neurons was low. However, this combination was effective under NP conditions 3 and 4 weeks following injury when TRPV1 expression in regenerated neurons was moderate to high. The current review, discusses the potential of QX-314 as a local anesthetic and a novel approach of using QX-CAP to reveal the dynamics of functional expression of TRPV1 on regenerated neurons following trigeminal nerve injury.</p>
Journal
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- Journal of Oral Science
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Journal of Oral Science 62 (2), 136-139, 2020
Nihon University School of Dentistry