Linked Life Data

1322710

Source:http://linkedlifedata.com/resource/pubmed/id/1322710

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-9-10
pubmed:abstractText
Hormonal activation of the cGMP-inhibited low Km cyclic AMP phosphodiesterase isoenzyme (cGI.PDE) by effectors, acting either through the cAMP-independent (insulin) or through cAMP-dependent (isoproterenol, forskolin ACTH and 8Br-cAMP) mechanisms, were compared in parametrial (PM) and femoral subcutaneous (SC) adipocytes from sham-operated (SHAM) and ovariectomized (OVX) rats. In SHAM rats, the basal cGI.PDE activity was 50% higher in PM than in SC adipocytes. In OVX rats, the cGi.PDE activatory responses to all the effectors tested remained unchanged in SC, but were completely suppressed in PM adipocytes. The mechanism underlying these defective cGI.PDE activatory responses to cAMP-dependent effectors observed in PM adipocytes after OVX seems to involve protein kinase A, since a decreased activation of cGI.PDE by protein kinase A was also found in these cells. Treatment of OVX rats with both estradiol and progesterone reversed the defective cAMP-dependent activation of cGI.PDE, but not the refractoriness of this isoenzyme to insulin activation. Taken together with previous observations from this laboratory on the fat cell adenylate cyclase system (Lacasa et al. (1991) Endocrinology 128, 747-753), these results: (a) demonstrate that the influence of the ovarian status on the key enzymes controlling cAMP metabolism in fat cells depends on the anatomical origin of these cells, and; (b) provide a biochemical explanation to the insensitivity of the SC adipocyte lipolytic system to ovarian hormones.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
22
pubmed:volume
1136
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
99-104
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Hormonal activation of the cGMP-inhibited low-Km cyclic AMP phosphodiesterase of rat adipocytes from different sites: influence of ovariectomy.
pubmed:affiliation
Department of Biochemistry, Faculty of Medicine Paris-Ouest, Centre hospitalier de Poissy, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't