Linked Life Data

8220175

Source:http://linkedlifedata.com/resource/pubmed/id/8220175

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1993-12-14
pubmed:abstractText
A combination of the stopped-flow technology with dual channel spectrofluorometry of Ca(2+)-indicators was utilized for the measurement of rapid Ca(2+)-signals in rat cerebral cortical synaptosomes evoked by K(+)-depolarization. There was no observable contribution of Ca(2+)-ions from intracellular stores to the rise in [Ca2+]i. The kinetics of the fast increase in intracellular Ca2+ concentration was analysed in relation to the depolarization strength. The maximal increase in [Ca2+]i and the time course of Ca(2+)-channel inactivation were determined for depolarizations obtained by different extracellular K(+)-concentrations ([K+]o). An apparent threshold was observed at about 18 mM [K+]o; a maximal Ca(2+)-signal amplitude was estimated at about 40 mM [K+]o. Pharmacological properties of the involved Ca(2+)-channels were determined using selective Ca(2+)-channel blockers (Dihydropyridines, omega-Conotoxin, omega-Agatoxins); the results suggest that a P-type voltage-dependent Ca(2+)-channel is the relevant channel type, generating the evoked Ca(2+)-signals in rat cerebral cortical synaptosomes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0197-0186
pubmed:author
pubmed:issnType
Print
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
331-41
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Analysis of rapid calcium signals in synaptosomes.
pubmed:affiliation
University Stuttgart-Hohenheim, Institute of Zoophysiology, Germany.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't