Linked Life Data

11839753

Source:http://linkedlifedata.com/resource/pubmed/id/11839753

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
16
pubmed:dateCreated
2002-4-15
pubmed:abstractText
The effects of cholesterol-perturbing agents on the mobilization of calcium induced upon the stimulation of human neutrophils by chemotactic factors were tested. Methyl-beta-cyclodextrin and filipin did not alter the initial peak of calcium mobilization but shortened the duration of the calcium spike that followed the addition of fMet-Leu-Phe. These agents also inhibited the influx of Mn(2+) induced by fMet-Leu-Phe or thapsigargin. Methyl-beta-cyclodextrin and filipin completely abrogated the mobilization of calcium induced by 10(-10) m platelet-activating factor, which at this concentration depends to a major extent on an influx of calcium as well as the influx of calcium induced by 10(-7) m platelet-activating factor. On the other hand, methyl-beta-cyclodextrin and filipin enhanced the mobilization of calcium induced by ligation of FcgammaRIIA, an agonist that did not induce a detectable influx of calcium. Finally, methyl-beta-cyclodextrin and filipin enhanced the stimulation of the profile of tyrosine phosphorylation, the activity of phospholipase D (PLD), and the production of superoxide anions induced by fMet-Leu-Phe. These results suggest that the calcium channels utilized by chemotactic factors in human neutrophils are either located in cholesterol-rich regions of the plasma membrane, or that the mechanisms that lead to their opening depend on the integrity of these microdomains.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
19
pubmed:volume
277
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
13473-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Cholesterol-modulating agents selectively inhibit calcium influx induced by chemoattractants in human neutrophils.
pubmed:affiliation
Canadian Institutes for Health Research group on the Molecular Mechanisms of Inflammation, Department of Medicine, Laval University, Québec, G1V 4G2 Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't