Linked Life Data

1395506

Source:http://linkedlifedata.com/resource/pubmed/id/1395506

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1992-11-2
pubmed:abstractText
1. The effect of free fatty acids [FFAs (saturated (S) and unsaturated (U))] on dexamethasone binding in vitro using liver cytosol from rainbow trout was examined. 2. All UFFAs but none of the SFFAs tested suppressed binding. This suppression is dose-dependent and correlated roughly with the degree of unsaturation of the FFAs. 3. Scatchard analysis indicated that the addition of linoleic C18:2 (150 microM) increased the dissociation constant (Kd = 5.1 +/- 0.4 x 10(-8) M vs control of 1.7 +/- 0.3 x 10(-8) M) but minimally affected the binding capacity (Bmax = 68 +/- 6.2 vs control of 88 +/- 15.2 fmol/mg protein) suggesting C18:2 caused a conformational change of the receptor. 4. Lineweaver-Burk plot revealed a mixed non-competitive type of inhibition by C18:2. 5. Free acid appeared to be required for inhibition as esterification or derivatization of the acid greatly diminished its potency. 6.C18:2 also promotes the dissociation of bound [3H]-dexamethasone from the steroid-receptor complex but slower in rate and lesser in magnitude compared to that caused by dexamethasone or the glucocorticoid antagonist RU 38486. 7. UFFAs and some of their derivatives can thus modulate glucocorticoid receptor function in vitro and might play essential roles in regulating glucocorticoid action in fish as well. 8. These fatty acids presumably acts at a site different from that of the glucocorticoid binding site.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0305-0491
pubmed:author
pubmed:issnType
Print
pubmed:volume
102
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
707-11
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Unsaturated fatty acids inhibit glucocorticoid receptor binding of trout hepatic cytosol.
pubmed:affiliation
Department of Pediatrics, Medical College of Wisconsin, University of Wisconsin, Milwaukee 53226.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.