Linked Life Data

7655653

Source:http://linkedlifedata.com/resource/pubmed/id/7655653

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1995-10-2
pubmed:abstractText
In recent years, considerable evidence has been accumulated on prostaglandins (PG) in modulating atrial natriuretic peptide (ANP) release. In the current study we investigated whether eicosanoids promote isoproterenol-induced ANP secretion from superfused rabbit sliced atria. Inclusion of the cyclooxygenase inhibitor indomethacin (10 mumol) to the superfusing medium abolished isoproterenol-induced ANP release. Next, PGE2, but not PGF2 alpha or PGI2 (10 mumol), increased ANP release. Furthermore, isoproterenol-induced PGE2 formation was fully attenuated by indomethacin. Dibutyl-cAMP (0.5 mmol) had no effect on PGE2 formation, and the protein kinase A (PKA) inhibitor H89 (20 mumol) did not alter isoproterenol-induced PGE2 formation. On the other hand, indomethacin led to a significant decrease in isoproterenol-induced cAMP production. In addition, PGE2 enhanced basal cAMP concentration in superfusates. Superfusion of sliced atria by forskolin (10 mumol) or by dibutyl-cAMP (0.5 mmol) produced a significant rise in ANP release. Finally, H89 was ineffective on basal ANP release but abolished the increase of ANP release in response to isoproterenol or to PGE2. We conclude that: the effect of isoproterenol on ANP release is sensitive to indomethacin and H89; PGE2, but not PGE2 alpha or PGI2, increases ANP release; isoproterenol promotes myocardial PGE2 formation independently of adenylate cyclase and PKA activation pathways; and PGE2-induced ANP release is mediated by cAMP production and subsequent PKA activation. These results suggest that isoproterenol-induced ANP release appears to be mediated at least partly by PGE2 with underlying cAMP formation and PKA activation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0804-4643
pubmed:author
pubmed:issnType
Print
pubmed:volume
133
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
255-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Myocardial production of prostaglandins: its role in atrial natriuretic peptide release.
pubmed:affiliation
Service de Biochimie, CHU Pitié-Salpêtrière, Paris, France.
pubmed:publicationType
Journal Article, In Vitro