Linked Life Data

15347843

Source:http://linkedlifedata.com/resource/pubmed/id/15347843

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2004-9-6
pubmed:abstractText
Mesenteric arteries (230-290 microm) were isolated from virgin female rats at diestrous and proestrous phases of the estrous cycle and from ovariectomized (OVX) rats with or without estrogen (E2) replacement (17beta-estradiol, 7.5 + 5 mg pellets, 21 d release). Arteries were mounted in a pressurized myograph system. Angiotensin-(1-7) [Ang-(1-7)] concentration-dependent responses (10(-10)-10(-5) M) were determined in arteries preconstricted with endothelin-1 (10(-7) M). Mesenteric arteries were pretreated with the specific Ang-(1-7) antagonist, D-[Ala7]-Ang-(1-7) (10(-7) M) to assess the Ang-(1-7) receptor-mediated dilator effect. Ang-(1-7) did not dilate mesenteric arteries from virgin rats at diestrus and placebo-treated OVX female rats as compared to the time control; however, Ang-(1-7) elicited a modest dilation at proestrus as compared to diestrus, which reached statistical significance at 10(-8) M concentrations. Ang-(1-7) caused a concentration-dependent vasodilation in mesenteric arteries of females with E2 replacement, with an EC50 of 21 nM. D-[Ala7]-Ang-(1-7) blocked the vasodilator effect of Ang-(1-7). Our results demonstrate that during proestrus Ang-(1-7) elicits modest vasodilation as compared to diestrus, but lacks vasodilatory properties in vessels from diestrous and ovariectomized rats. Estrogen replacement restores a significant dilator response to Ang-(1-7) in OVX rats that is mediated by a D-[Ala7]-Ang-(1-7) sensitive site.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1355-008X
pubmed:author
pubmed:issnType
Print
pubmed:volume
24
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
161-5
pubmed:dateRevised
2010-6-24
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Vascular responses to Angiotensin-(1-7) during the estrous cycle.
pubmed:affiliation
The Hypertension and Vascular Disease Center, Wake Forest University School of Medicine, Winston-Salem, NC 27157-1032, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't