Linked Life Data

7404849

Source:http://linkedlifedata.com/resource/pubmed/id/7404849

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1980-10-27
pubmed:abstractText
Experiments were performed to determine the influence of varying inspired oxygen tension on renal prostaglandin E2 (PGE2) excretion, renal hemodynamics, and water and electrolyte excretion in the conscious dog. Hypoxic exposure (PIO2 = 56 torr) resulted in a 13% increase in renal blood flow (RBF), while hyperoxic breathing with PIO2 of 700, 1426, or 2139 torr, all resulted in significant 5--7% decline in RBF, a response that was significantly attenuated compared to the striking renal vasoconstriction caused by hyperoxia in anesthetized dogs. Hyperbaric oxygenation (HBO) (1426 torr O2, 2139 torr O2) was associated with unexpected decreases in urine flow (V) of 61% and 70%, respectively. The antidiuresis and mild hemodynamic adjustments were correlated with a 67% decline in urinary PGE2 excretion (UPGE2 x V) when the dogs breathed 700 torr O2, while exposure to 1426 torr O2 and 2139 torr O2 diminished UPGE2 x V by 92% and 99%, respectively. Plasma antidiuretic hormone (ADH) concentration, measured during exposure to 1426 torr O2, was unchanged. In addition, this nonpharmacologic hyperbaric decline in PGE2 excretion was not associated with any changes in sodium excretion of renin secretion, in contrast to the usual depression of these variables with pharmacologic PG inhibition (indomethacin). The HBO antidiuresis may be a consequence of an increased medullary osmotic gradient secondary to reduced vasa recta blood flow. Alternatively, this antiduresis could occur as a consequence of a lowering of the normal functional antagonism existing between PGE2 and ADH, such that the influence of endogenous ADH is potentiated.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0093-5387
pubmed:author
pubmed:issnType
Print
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
113-26
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Antidiuresis and inhibition of PGE2 excretion by hyperoxia in the conscious dog.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.