Linked Life Data

1664940

Source:http://linkedlifedata.com/resource/pubmed/id/1664940

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1992-3-23
pubmed:abstractText
We examined the effects of calcitonin gene-related peptide (CGRP) on the membrane currents of single atrial and ventricular cells of guinea pig heart. The tight-seal whole-cell voltage-clamp technique was used. In atrial cells, like isoproterenol, CGRP increased the L-type Ca channel current (ICa.L) in a concentration-dependent manner. Human CGRP-(8-37), a putative CGRP receptor antagonist, completely abolished the CGRP-induced increase of ICa.L. Although the effects of CGRP were similar to those of isoproterenol, propranolol, a beta-adrenergic receptor antagonist, did not affect the CGRP-induced increase of ICa.L. After ICa.L had been maximally activated by isoproterenol (2 microM) or intracellular cyclic adenosine 5'-monophosphate (100 microM), CGRP failed to increase ICa.L. Acetylcholine antagonized the effects of CGRP on ICa.L. Unlike the effects on atrial cells, CGRP had no significant effects on the membrane currents of ventricular myocytes. These results indicate that CGRP increases ICa.L via adenylate cyclase activation by binding to specific membrane receptors in cardiac atrial myocytes. Furthermore, CGRP receptors are expressed in atrial cells but probably not in ventricular cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0031-6768
pubmed:author
pubmed:issnType
Print
pubmed:volume
419
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
644-50
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Effects of calcitonin gene-related peptide on membrane currents in mammalian cardiac myocytes.
pubmed:affiliation
2nd Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan.
pubmed:publicationType
Journal Article, In Vitro