Linked Life Data

3002196

Source:http://linkedlifedata.com/resource/pubmed/id/3002196

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1 Pt 2
pubmed:dateCreated
1986-2-20
pubmed:abstractText
Essential components of the renin-angiotensin system such as renin enzymes, angiotensinogen, converting enzyme, and angiotensin receptors have been found in vascular tissues. Locally generated angiotensin (ANG) II may regulate vascular tone by contracting vascular smooth muscle or potentiating sympathetic activity. Recently it was suggested that beta-adrenoceptor-induced enhancement of noradrenergic neurotransmission is mediated by the vascular renin-angiotensin system. The present study was designated to obtain direct evidence for the release of ANG II from the vasculature by beta-adrenoceptor activation. Isolated rat mesenteric arteries were perfused in vitro with Krebs-Ringer solution, and released ANG II was concentrated in a Sep-Pak C-18 cartridge connected to the perfusion system. High-pressure liquid chromatography combined with radioimmunoassay clearly demonstrated the presence of ANG I, II, and a small amount of ANG III in the perfusate. Isoproterenol (10(-9) - 10(-6) M) induced the enhancement of pressor responses to nerve stimulation. This effect was markedly suppressed by propranolol (5 X 10(-7) M), captopril (2 X 10(-6) M), or [Sar1-Ile8]ANG II (10(-6) M). Isoproterenol (10(-9) - 10(-6) M) caused increase in the release of ANG II from mesenteric arteries. The increase in ANG II release during isoproterenol (10(-6) M) infusion was blocked by propranolol (10(-6) M). Captopril (2 X 10(-6) M) also inhibited the increase in ANG II induced by isoproterenol. These results indicate that locally generated ANG II is released from isolated perfused rat mesenteric arteries and its release is mediated by beta-adrenoceptors.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
250
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
H144-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Beta-adrenoceptor-mediated release of angiotensin II from mesenteric arteries.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't