Linked Life Data

12623961

Source:http://linkedlifedata.com/resource/pubmed/id/12623961

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2003-3-7
pubmed:abstractText
In the rat, activation of alpha2-adrenergic receptors in the anterior hypothalamic nucleus inhibits sympathetic nervous system activity. Furthermore, local release of atrial natriuretic peptide inhibits norepinephrine release in this nucleus, blocking local activation of alpha2-adrenergic receptors, and thereby contributes to NaCl-sensitive hypertension in spontaneously hypertensive rats. To further test the specificity of this mechanism, either alpha2-adrenergic receptor agonists or atrial natriuretic peptide was microinjected into anterior hypothalamic nucleus of conscious C57BL/6 mice in which the alpha2-adrenergic receptor was functionally deleted by a single point mutation (n=10 per group). In control mice, microinjection of either clonidine or guanabenz (10-3 to 10-7 mol/L) caused a rapid fall in mean arterial pressure that lasted for several minutes. In the knockout mice there was no response to the injection of either dose of either agonist. Microinjection of atrial natriuretic peptide (10-6 to 10-7 mol/L) caused a rapid increase in mean arterial pressure (8.2+/-1.3 and 6.55+/-1.2 mm Hg, respectively) in the control mice that was similar to the responses previously observed in Wistar-Kyoto rats. In contrast, the microinjections did not significantly alter mean arterial pressure in the knockout mice. These experiments demonstrate that in the anterior hypothalamic nucleus of the mouse (and probably in the rat) alpha2A-adrenergic receptors mediate both sympathoinhibitory responses to alpha2-adrenergic receptor agonists and the action of atrial natriuretic peptide.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1524-4563
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
41
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
571-5
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Alpha2A-adrenergic receptors mediate sympathoinhibitory responses to atrial natriuretic peptide in the mouse anterior hypothalamic nucleus.
pubmed:affiliation
Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294-0006, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.