Published in:
Open Access
01-12-2007 | Research
A role of TRPA1 in mechanical hyperalgesia is revealed by pharmacological inhibition
Authors:
Matt Petrus, Andrea M Peier, Michael Bandell, Sun Wook Hwang, Truc Huynh, Nicholas Olney, Tim Jegla, Ardem Patapoutian
Published in:
Molecular Pain
|
Issue 1/2007
Login to get access
Abstract
Mechanical hyperalgesia is a clinically-relevant form of pain sensitization that develops through largely unknown mechanisms. TRPA1, a Transient Receptor Potential ion channel, is a sensor of pungent chemicals that may play a role in acute noxious mechanosensation and cold thermosensation. We have developed a specific small molecule TRPA1 inhibitor (AP18) that can reduce cinnameldehyde-induced nociception in vivo. Interestingly, AP18 is capable of reversing CFA-induced mechanical hyperalgesia in mice. Although TRPA1-deficient mice develop normal CFA-induced hyperalgeisa, AP18 is ineffective in the knockout mice, consistent with an on-target mechanism. Therefore, TRPA1 plays a role in sensitization of nociception, and that compensation in TRPA1-deficient mice masks this requirement.