Linked Life Data

8238431

Source:http://linkedlifedata.com/resource/pubmed/id/8238431

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4 Pt 2
pubmed:dateCreated
1993-12-1
pubmed:abstractText
We tested the effect of certain newly synthesized allosteric modifiers of hemoglobin on the dilation induced by arterial hypoxia, arterial hypotension, and arterial hypercapnia in cerebral arterioles of anesthetized cats equipped with cranial windows for the observation of the cerebral microcirculation. The allosteric modifiers of hemoglobin are isomers of 2-(aryloxy)-2-methylpropionic acid. They shift the oxygen dissociation of hemoglobin to the right, thereby facilitating the local release of oxygen. When these compounds were applied topically by superfusion at a rate of 1 ml/min in a concentration of 0.1 mM, they had no significant effect on baseline arteriolar diameter but reduced significantly the vasodilation from arterial hypoxia and arterial hypotension. They did not influence the vasodilation from arterial hypercapnia. Spectrophotometric measurements of optical densities from pial veins 50-80 microns in diameter indicated that the superfusion with the allosteric compounds reduced hemoglobin oxygen saturation both during room air breathing and during hypoxia. We conclude that the vasodilations from arterial hypoxia and arterial hypotension are mediated by local oxygen-dependent mechanisms. The allosteric modifiers of hemoglobin may be useful as tools in investigating oxygen-dependent mechanisms.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
265
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
H1439-43
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Effect of local change in O2 saturation of hemoglobin on cerebral vasodilation from hypoxia and hypotension.
pubmed:affiliation
Departments of Medicine and Medicinal Chemistry, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.