Linked Life Data

825505

Source:http://linkedlifedata.com/resource/pubmed/id/825505

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5 Pt. 1
pubmed:dateCreated
1977-1-25
pubmed:abstractText
Prostaglandins are naturally occurring substances with powerful vasoactive effects that are released from tissues during hypoxia or ischemia. Several workers have suggested that a prostaglandin may help to mediate the pulmonary vascular pressor response to alveolar hypoxia. To investigate this possibility, we have measured the pressor responses to hypoxia before and after prostaglandin synthesis antagonism with meclofenamate in eight anesthetized dogs, two groups of awake calves (n=10 and =5), and nine isolated, perfused rat lungs. In addition, synthesis was inhibited by the use of indomethacin in nine additional dogs. The stability of the pulmonary vascular response to repeated hypoxic challenges was demonstrated in nine other dogs. In each species and with both prostaglandin antagonists, the pulmonary pressor responses to hypoxia were significantly increased rather than reduced. We conclude that prostaglandins do not mediate the pulmonary vasoconstriction caused by hypoxia. The consistent increase observed suggests that hypoxic vasoconstriction stimulates prostaglandin synthesis, the net effect of which is pulmonary vasodilatation which opposes the constriction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0021-8987
pubmed:author
pubmed:issnType
Print
pubmed:volume
41
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
714-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1976
pubmed:articleTitle
Prostaglandin synthetase inhibitors do not decrease hypoxic pulmonary vasoconstriction.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.