Title |
Prostaglandin Metabolite Induces Inhibition of TRPA1 and Channel-Dependent Nociception
|
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Published in |
Molecular Pain, January 2012
|
DOI | 10.1186/1744-8069-8-75 |
Pubmed ID | |
Authors |
Yingqi Weng, Patricia A Batista-Schepman, Marie E Barabas, Eli Q Harris, Thomas B Dinsmore, Elena A Kossyreva, Audra M Foshage, Michelle H Wang, Matthew J Schwab, Victoria M Wang, Cheryl L Stucky, Gina M Story |
Abstract |
The Transient Receptor Potential (TRP) ion channel TRPA1 is a key player in pain pathways. Irritant chemicals activate ion channel TRPA1 via covalent modification of N-terminal cysteines. We and others have shown that 15-Deoxy-Δ12, 14-prostaglandin J2 (15d-PGJ2) similarly activates TRPA1 and causes channel-dependent nociception. Paradoxically, 15d-PGJ2 can also be anti-nociceptive in several pain models. Here we hypothesized that activation and subsequent desensitization of TRPA1 in dorsal root ganglion (DRG) neurons underlies the anti-nociceptive property of 15d-PGJ2. To investigate this, we utilized a battery of behavioral assays and intracellular Ca2+ imaging in DRG neurons to test if pre-treatment with 15d-PGJ2 inhibited TRPA1 to subsequent stimulation. |
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