Linked Life Data

10340310

Source:http://linkedlifedata.com/resource/pubmed/id/10340310

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1999-7-21
pubmed:abstractText
High concentrations of diazepam-binding inhibitor (DBI) mRNA have been detected in astrocytoma, suggesting that DBI-derived peptides may play a role in glial cell proliferation. In the present study, we have investigated the effect of a processing product of DBI, the octadecaneuropeptide ODN, on DNA synthesis in cultured rat astrocytes. At very low concentrations (10(-14) to 10(-11) M), ODN caused a dose-dependent increase of [3H]thymidine incorporation. At higher doses (10(-10) to 10(-5) M), the effect of ODN gradually declined. The central-type benzodiazepine receptor antagonist flumazenil (10(-6) M) completely suppressed the stimulatory action of ODN whereas the peripheral-type benzodiazepine receptor ligand, PK11195 (10(-6) M) had no effect. The ODN-induced stimulation of [3H]thymidine incorporation was mimicked by methyl 6,7-dimethoxy-4-ethyl-beta-carboline-3-carboxylate (DMCM). The GABAA receptor antagonist bicuculline (10(-4) M) suppressed the effect of both ODN and DMCM on DNA synthesis. Exposure of cultured astrocytes to the specific GABAA agonist 3APS (10(-10) to 10(-4) M) also induced a dose-related increase of [3H]thymidine incorporation. The present study indicates that ODN, acting through central-type benzodiazepine receptors associated with the GABAA receptor complex, stimulates DNA synthesis in rat glial cells. These data provide evidence for an autocrine role of endozepines in the control of glial cell proliferation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0028-3908
pubmed:author
pubmed:issnType
Print
pubmed:volume
38
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
725-32
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
The endozepine ODN stimulates [3H]thymidine incorporation in cultured rat astrocytes.
pubmed:affiliation
European Institute for Peptide Research (IFRMP no. 23), INSERM U 413, UA CNRS, University of Rouen, Mont-Saint-Aignan, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't