Linked Life Data

8861428

Source:http://linkedlifedata.com/resource/pubmed/id/8861428

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-4-1
pubmed:abstractText
The development of intimal hyperplasia in reversed vein grafts is associated with altered endothelial and vasomotor function. This study examines the effect of surgery on the morphology and vasomotor function of experimental arterial and venous vein bypass grafts. Twelve reversed vein grafts, 12 in situ vein grafts and 12 venovenous grafts were placed in 24 New Zealand White rabbits. All grafts remained patent and were harvested after 28 days. Isometric contraction to norepinephrine, histamine, bradykinin, serotonin and relaxation to acetylcholine and sodium nitroprusside following pre-contraction with prostaglandin F(2 alpha) were determined on the grafts and on contralateral jugular veins. Compared to the contralateral jugular veins, norepinephrine supersensitivity was induced in the reversed vein grafts, and venovenous vein grafts but not in the in situ vein grafts. Decrease in histamine sensitivity occurred in all grafted vessels. Bradykinin responses were significantly reduced in the in situ vein grafts and reversed vein grafts. Contractile responses to serotonin developed in the in situ vein grafts and reversed vein grafts only. Acetylcholine-induced endothelium-derived relaxing factor-mediated relaxation of the contralateral jugular veins was preserved in both venovenous grafts and in situ vein grafts but was lost in reversed vein grafts. All tissues relaxed to sodium nitroprusside in dose-dependent manner. The data suggest that norepinephrine supersensitivity in reversed vein grafts results from excision of the vessel. Attenuation of bradykinin responses and the enhanced contractile responses to serotonin appear predominantly to result from arterialization. Decreases in histamine sensitivity appear related both to excision and to arterialization. Neither the excision of the vein nor arterialization individually influences the alterations in endothelium-derived relaxing factor-mediated relaxation. However, a combination of excision and arterialization results in the altered endothelium-derived relaxing factor-mediated relaxation. This study suggests that the surgical preparation of the vein and the surgical procedure used have significantly different effects on endothelium-derived relaxing factor-mediated relaxation and smooth muscle contractility in vein grafts.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0967-2109
pubmed:author
pubmed:issnType
Print
pubmed:volume
4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
150-60
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
A comparative study of endothelium-derived relaxing factor-mediated relaxation and smooth muscle cell function in arterial and venous vein bypass grafts.
pubmed:affiliation
Vascular Biology and Atherosclerosis Research Laboratory, Duke University Medical Center, Durham, North Carolina, USA.
pubmed:publicationType
Journal Article, Comparative Study, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't