Linked Life Data

9572537

Source:http://linkedlifedata.com/resource/pubmed/id/9572537

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-6-22
pubmed:abstractText
The vascular effects of PGE2, PGF2alpha and latanoprost acid on isolated bovine long posterior ciliary arteries and episcleral veins have been investigated using a small vessel myograph. PGE2 caused vasorelaxation both in the ciliary artery and episcleral vein (EC50: 7.9x10(-9) M and 2.1x10(-8) M respectively). Blockade of thromboxane receptors with GR 32191B, a TP receptor antagonist, shifted the concentration-response curves to the left in both preparations, probably indicating a slight co-stimulation of TP receptors in these vessels. Blockade of tachykinin NK-1 receptors had no effect on the PGE2 concentration-response curve. PGF2alpha caused a concentration dependent contraction in half of the ciliary arteries examined and relaxation in the other half. In the presence of the thromboxane receptor antagonist (GR 3211B) PGF2alpha always induced relaxation of the ciliary artery (EC50:1.3x10[-5] M). At higher concentrations PGF2alpha tended to slightly constrict the episcleral veins, but in the presence of the TP receptor antagonist (GR 32191B) only relaxation was observed. Latanoprost acid contracted the ciliary artery at concentrations above 10(-6) M. This effect was completely abolished by the TP receptor antagonist (GR 32191B). In the episcleral vein latanoprost acid induced a slight relaxation but in the presence of the TP receptor antagonist (GR 32191B) no effect was observed. These results indicate that PGE2 invariably induces vasorelaxation of bovine ciliary arteries and episcleral veins, whereas both PGF2alpha and latanoprost acid at high concentrations can cause vasoconstriction probably by stimulating TP receptors. PGF2alpha causes marked relaxation of both ciliary arteries and episcleral veins in the presence of the TP blocker which seems unlikely to be mediated by FP receptors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1080-7683
pubmed:author
pubmed:issnType
Print
pubmed:volume
14
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
119-28
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Effects of prostaglandin E2, F2alpha, and latanoprost acid on isolated ocular blood vessels in vitro.
pubmed:affiliation
Glaucoma Research Laboratories, Pharmacia & Upjohn, Uppsala, Sweden.
pubmed:publicationType
Journal Article, In Vitro