Linked Life Data

6144717

Source:http://linkedlifedata.com/resource/pubmed/id/6144717

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1984-6-27
pubmed:abstractText
Groups of rats were pretreated with 4-week diets containing 12.5% corn oil or linseed oil. At the end of this period peritoneal macrophages were elicited and isolated. These cells were used for binding experiments with 3H-PGE2 and for estimation of prostaglandin-stimulated cAMP production. Specific binding of 3H-PGE2 was saturable, reversible, protein-dependent, and correlated with stimulation of cAMP production, indicating that specific binding referred to receptor binding. PGE1 and PGI2 were far less effective than PGE2 in competition of binding with 3H-PGE2, indicating receptor selectivity for PGE2. Scatchard analysis of the specific binding data revealed a high affinity component (Kd 17 nM) and low affinity component. The total number of high- and low-affinity binding sites, respective Kd values, and PG stimulation of cAMP production of cells from rats fed the linseed oil diet were comparable to controls. The corn oil diet, however, resulted in a twofold increase in total number of high- and low-affinity binding sites, while respective Kd values were unchanged. This enhancement of binding capacity could be explained by an increased density of binding sites on the cells, and may itself be responsible for the increased sensitivity of the macrophages in this diet group for PG-stimulated cAMP production. The data suggest a regulatory mechanism at the receptor level and are discussed in terms of possible altered bioavailability of arachidonic acid-derived PGE2.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-2275
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
262-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Regulation of prostaglandin E2 receptors in vivo by dietary fatty acids in peritoneal macrophages from rats.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't