Linked Life Data

11703386

Source:http://linkedlifedata.com/resource/pubmed/id/11703386

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2001-11-12
pubmed:abstractText
1. In the present study we tested the effect of arg-gly-asp (RGD) peptides on vasomotor responses in rat isolated mesenteric arteries. More specifically, the hypothesis was tested that RGD interaction with integrins mediates relaxation attributed to endothelium-derived hyperpolarizing factor (EDHF). 2. The presence of the beta3 integrin subunit was shown by western blot analysis. To study its functional role, arteries (355 +/- 11 microm; n = 50) were mounted in a wire myograph set-up to measure isometric force generation. After blockade of nitric oxide synthesis with N(G)-nitro-L-arginine (0.1 mmol/L) and prostaglandin synthesis with indomethacin (10 micromol/L), methacholine (10 micromol/L) induced a transient relaxation within 1 min of 72 +/- 4.0% (as percentage of precontraction with phenylephrine; n = 27). 3. These responses were inhibited by a 60 mmol/L potassium buffer (18 +/- 6.0%; n = 6) or endothelium denudation (12 +/- 3.2%; n = 7), consistent with EDHF. 4. A function-blocking monoclonal antibody against the integrin beta3 chain did not affect relaxation. 5. The RGD peptides gly-arg-gly-asp-thr-pro (GRGDTP), gly-arg-gly-asp-ser (GRGDS) and cyclic RGD, ligands for the RGD binding site of integrins, also did not affect relaxation induced by methacholine. 6. Cyclic RGD increased contraction from 91 +/- 3 to 98 +/- 3% (as percentage of 120 mmol/L potassium). 7. In conclusion, these data show that vasomotor responses related to integrins are small and not involved in hyperpolarization attributed to EDHF in rat mesenteric artery.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0305-1870
pubmed:author
pubmed:issnType
Print
pubmed:volume
28
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
873-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Vasomotor effects of arg-gly-asp (RGD) peptides are limited and not related to endothelium-derived hyperpolarizing factor-mediated relaxation in rat mesenteric arteries.
pubmed:affiliation
Department of Medical Physics, Academic Medical Center, University of Amsterdam, The Netherlands.
pubmed:publicationType
Journal Article, In Vitro