Linked Life Data

15337272

Source:http://linkedlifedata.com/resource/pubmed/id/15337272

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2004-8-31
pubmed:abstractText
The Nav1.8 sodium channel isoform, expressed in sensory neurons and implicated in pain responses, is known to be upregulated in Xenopus oocytes by agents that activate protein kinase A. In the absence of exogenous modulators, Nav1.8 channels expressed in oocytes exhibited spontaneous downregulation, so that the amplitudes of peak sodium currents at the end of a 30-min recording period were reduced to 58% of those at the outset of recording with no change in the properties of the expressed channels. Perfusion of oocytes with either cyclosporin A or deltamethrin, considered to be diagnostic inhibitors of the protein phosphatase calcineurin, at 10 microM blocked spontaneous downregulation. These results identify endogenous calcineurin as the mediator of Nav1.8 sodium channel downregulation in oocytes. The use of a calcineurin inhibitor such as cyclosporin A provides an effective means of stabilizing the expression of Nav1.8 sodium channels in oocytes for functional and pharmacological studies.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0304-3940
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
367
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
389-93
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Cyclosporin A and deltamethrin block the downregulation of Nav1.8 sodium channels expressed in Xenopus oocytes.
pubmed:affiliation
Department of Neurology, Yale University School of Medicine, New Haven, CT 06510, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't