Linked Life Data

4030763

Source:http://linkedlifedata.com/resource/pubmed/id/4030763

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
19
pubmed:dateCreated
1985-10-7
pubmed:abstractText
Addition of 0.4-25 microM extracellular ATP results in transient, dose-dependent increases in cytosolic free calcium measured in Ehrlich ascites tumor cells. In cells incubated with 1 mM extracellular Ca2+, ATP induces a triphasic Ca2+ transient: an initial rapid increase (2-3 s), a second, slower phase of increase (60-90 s), and, finally, a gradual return to near resting [Ca2+]i (4-5 min). Several findings demonstrate that the initial, rapid phase of Ca2+ transient results from a mobilization of Ca2+ from a non-mitochondrial intracellular store, while the second, slow phase of increase is produced by enhanced influx of Ca2+ across the plasma membrane. Successive additions of extracellular ATP can elicit repetitive Ca2+ transients if the initially added ATP is removed either through the action of native ecto-ATPase activity or exogenous hexokinase. Other adenine nucleotides, including non-hydrolyzable ATP analogs, neither alter cytosolic [Ca2+] nor antagonize the ATP-induced effects. Conversely, other nucleotide triphosphates (ITP, UTP, and GTP) induce Ca2+ transients which are identical to those produced by ATP. A variety of experimental results indicate that these actions of ATP and other nucleotide triphosphates are not due to a generalized increase in plasma membrane permeability. The results suggest that, in these transformed cells, ATP may act in a manner similar to other Ca2+ mobilizing hormones and growth factors.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
260
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
10653-61
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Intracellular Ca2+ mobilization activated by extracellular ATP in Ehrlich ascites tumor cells.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.