rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
2
|
pubmed:dateCreated |
1994-3-15
|
pubmed:abstractText |
It has been reported in the literature that alpha 1-adrenoceptor activation in adult rat heart does not cause an increase in Ca2+ current but involves a decrease in I(t). This may explain in part the positive inotropic effect of alpha 1-adrenoceptor activation. In this study, the effect of phenylephrine, an alpha-adrenergic agonist, on L-type Ca2+ channel current was compared in young and neonatal rat myocytes. In the presence of propranolol, phenylephrine increased the Ca2+ current (reversed by prazosin) in neonatal but not in young rat myocytes suggesting that the coupling of the alpha 1-adrenoceptor to Ca2+ channels may switch during development.
|
pubmed:language |
eng
|
pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
Jan
|
pubmed:issn |
0014-5793
|
pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
31
|
pubmed:volume |
338
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
234-8
|
pubmed:dateRevised |
2008-11-21
|
pubmed:meshHeading |
pubmed-meshheading:8307186-Aging,
pubmed-meshheading:8307186-Animals,
pubmed-meshheading:8307186-Animals, Newborn,
pubmed-meshheading:8307186-Calcium Channels,
pubmed-meshheading:8307186-Electric Conductivity,
pubmed-meshheading:8307186-Heart,
pubmed-meshheading:8307186-Membrane Potentials,
pubmed-meshheading:8307186-Phenylephrine,
pubmed-meshheading:8307186-Prazosin,
pubmed-meshheading:8307186-Propranolol,
pubmed-meshheading:8307186-Rats,
pubmed-meshheading:8307186-Rats, Sprague-Dawley,
pubmed-meshheading:8307186-Receptors, Adrenergic, alpha,
pubmed-meshheading:8307186-Ventricular Function
|
pubmed:year |
1994
|
pubmed:articleTitle |
Changes in alpha 1-adrenoceptor coupling to Ca2+ channels during development in rat heart.
|
pubmed:affiliation |
Department of Physiology, University of Alberta, Edmonton, Canada.
|
pubmed:publicationType |
Journal Article,
Comparative Study
|