Linked Life Data

3874997

Source:http://linkedlifedata.com/resource/pubmed/id/3874997

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1985-9-13
pubmed:abstractText
Rat hypothalamic blocks incubated in vitro were used to study the characteristics of binding of [3H]dexamethasone and other steroids to cytosolic binding sites. Cytosols prepared following incubation of the tissue with [3H]dexamethasone for 2 h contained specifically bound steroid in amounts that depended upon the concentration of potassium (but not sodium) ions in the extracting buffer. There was an increase in bound [3H]dexamethasone extracted as the potassium ion concentration increased up to 0.1 M, but not beyond. Dexamethasone, when added to hypothalami in vitro caused a biphasic inhibition of bioactive corticotrophin-releasing factor (CRF) release, and the extent of the second phase of inhibition was dose-related. 11-Epicortisol, when added in a 100-fold molar excess over dexamethasone was able to prevent the second phase of inhibition caused by the latter steroid, as in the binding studies it was able to cause a 50% reduction in the binding of [3H]dexamethasone. In the functional studies it was shown that 11-epicortisol was able to "rescue" the tissue from dexamethasone-mediated delayed inhibition of CRF secretion if added to the blocks 30 min (but not later) after the agonistic steroid.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0022-4731
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
759-65
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
A correlative study of the binding of dexamethasone in hypothalamic blocks in vitro with its ability to inhibit the release of bioactive corticotrophin-releasing factor.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't