期刊
NEUROREPORT
卷 18, 期 10, 页码 969-973出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/WNR.0b013e328165d1a2
关键词
alternative splicing; capsaicin; dorsal root ganglion; heat; pain; resiniferatoxin; TRPVI cation channels
资金
- NINDS NIH HHS [NS38737] Funding Source: Medline
The capsaicin receptor (VRI, TRPVI) is a ligand-gated ion channel predominantly expressed in peripheral nociceptors and activated by multiple noxious stimuli including products of inflammation. A 5'-splice variant (VR.5'sv) of TRPVI has been previously isolated and found to be insensitive to noxious stimuli. We report in this study that coexpression of VR.5'sv with TRPVI in Xenopus oocytes blocks TRPVI-mediated current responses. Oocytes expressing the inhibitory profile demonstrated colocalization of TRPVI and VR.5'sv-associated immunostaining in the plasma membrane. TRPVI protein expression was comparable in all groups. Evidence of endogenous VR.5'-splice variant-like-protein expression was detected in dorsal root ganglion. These results support the idea that coexpression of VR.5'sv or a similar variant could result in inhibitory modulation of TRPVI activation.
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