Linked Life Data

8897489

Source:http://linkedlifedata.com/resource/pubmed/id/8897489

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-2-6
pubmed:abstractText
Nerve terminals obtained from rat brain cortex and hippocampus, were labelled with 0.04 microM of [3H]noradrenaline ([3H]NA). Thereafter the basal release of [3H]NA was measured in a Brandel superfusion apparatus, in the presence of alpha 1-adrenoceptor agonists (phenylephrine or noradrenaline) or these alpha 1-adrenoceptor agonists along with prazosin, an alpha 1-adrenoceptor antagonist. In cortical synaptosomes both alpha 1-adrenoceptor agonists increased the basal release of [3H]NA in a concentration-dependent manner (EC50 = 0.15 microM for phenylephrine and 12.6 microM for noradrenaline). Effects were reversed by 0.01 microM prazosin (EC50 = 2.46 and 130.1 microM, respectively). In synaptosomes from rat brain hippocampus, phenylephrine (EC50 = 1.28 microM) and noradrenaline (EC50 = 33.7 microM) also increased the [3H]NA release and prazosin (0.01 microM) shifted the corresponding concentration-response curves to the right (EC50 = 7.38 and 264.0 microM, respectively). Events produced by noradrenaline acting as alpha 1-adrenoceptor agonist did not show Ca2+ dependence. These results suggest (1) the presence of functional alpha 1-adrenoceptors in nerve terminals from rat brain cortex and hippocampus, (2) that these receptors seem to play a role in the presynaptic modulation of [3H]NA release, and (3) that intraterminal Ca2+ may be involved.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0304-3940
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
216
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
187-90
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Possible involvement of alpha 1-adrenoceptors in the modulation of [3H]noradrenaline release in rat brain cortical and hippocampal synaptosomes.
pubmed:affiliation
Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Spain.
pubmed:publicationType
Journal Article