Linked Life Data

1836059

Source:http://linkedlifedata.com/resource/pubmed/id/1836059

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3-4
pubmed:dateCreated
1992-1-14
pubmed:abstractText
Cultured astrocytes from rat cortex respond to the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) by the activation of Cl- channels [Bormann J, Kettenmann H (1988) Proc Natl Acad Sci USA 85:9336-9340]. The glial response shares many pharmacological properties with those mediated by neuronal GABAA receptors, but differs in its sensitivity to inverse benzodiazepine agonists [Backus KH, Kettenmann H, Schachner M (1988) Glia 1:132-140]. To compare glial GABA receptors further with their neuronal counterparts, we analysed the effect of steroids, which have recently been shown to modulate neuronal GABAA-receptor-mediated responses, on GABA-induced currents in astrocytes. The agonist allotetrahydrodeoxycorticosterone (THDOC) at concentrations of 100 nM and 1 microM enhanced GABA-evoked (with 10 microM GABA) currents up to 115% and 162.4% of controls respectively. The antagonist dehydroisoandrosterone 3-sulphate (DHEAS) at concentrations of 1 microM, and 100 microM depressed GABA-evoked (10 microM) currents to 72%, 42.8% and 21.4% of controls respectively. The steroids were less effective at higher GABA concentrations. 100 microM DHEAS directly elicited a membrane current, while THDOC (1 microM) did not exert any direct response. This study demonstrates that steroids modulate GABA-evoked currents and thus may interfere with any of the functions of glial GABA receptors that are at present under discussion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0031-6768
pubmed:author
pubmed:issnType
Print
pubmed:volume
419
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
263-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Effect of steroids on gamma-aminobutyrate-induced currents in cultured rat astrocytes.
pubmed:affiliation
Department of Neurobiology, University of Heidelberg, Federal Republic of Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't