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URL Address
<a href="http://doi.org/10.1002/prp2.153" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/prp2.153</a>
Pages
e00153–e00153
Issue
4
Volume
3
Dublin Core
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Title
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Propofol restores TRPV1 sensitivity via a TRPA1-, nitric oxide synthase-dependent activation of PKCepsilon.
Publisher
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Pharmacology research & perspectives
Date
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2015
2015-08
Subject
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PKCepsilon and NOS; propofol; TRPA1; TRPV1
Creator
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Sinharoy Pritam; Zhang Hongyu; Sinha Sayantani; Prudner Bethany C; Bratz Ian N; Damron Derek S
Description
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We previously demonstrated that the intravenous anesthetic, propofol, restores the sensitivity of transient receptor potential vanilloid channel subtype-1 (TRPV1) receptors via a protein kinase C epsilon (PKCepsilon)-dependent and transient receptor potential ankyrin channel subtype-1 (TRPA1)-dependent pathway in sensory neurons. The extent to which the two pathways are directly linked or operating in parallel has not been determined. Using a molecular approach, our objectives of the current study were to confirm that TRPA1 activation directly results in PKCepsilon activation and to elucidate the cellular mechanism by which this occurs. F-11 cells were transfected with complimentary DNA (cDNA) for TRPV1 only or both TRPV1 and TRPA1. Intracellular Ca(2+) concentration was measured in individual cells via fluorescence microscopy. An immunoblot analysis of the total and phosphorylated forms of PKCepsilon, nitric oxide synthase (nNOS), and TRPV1 was also performed. In F-11 cells containing both channels, PKCepsilon inhibition prevented the propofol- and allyl isothiocyanate (AITC)-induced restoration of TRPV1 sensitivity to agonist stimulation as well as increased phosphorylation of PKCepsilon and TRPV1. In cells containing TRPV1 only, neither agonist induced PKCepsilon or TRPV1 phosphorylation. Moreover, NOS inhibition blocked propofol-and AITC-induced restoration of TRPV1 sensitivity and PKCepsilon phosphorylation, and PKCepsilon inhibition prevented the nitric oxide donor, SNAP, from restoring TRPV1 sensitivity. Also, propofol-and AITC-induced phosphorylation of nNOS and nitric oxide (NO) production were blocked with the
Identifier
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<a href="http://doi.org/10.1002/prp2.153" target="_blank" rel="noreferrer noopener">10.1002/prp2.153</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2015
Bratz Ian N
Damron Derek S
Pharmacology research & perspectives
PKCepsilon and NOS
propofol
Prudner Bethany C
Sinha Sayantani
Sinharoy Pritam
TRPA1
TRPV1
Zhang Hongyu