Linked Life Data

1612634

Source:http://linkedlifedata.com/resource/pubmed/id/1612634

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1992-7-28
pubmed:abstractText
Basophils located in tissues are called mast cells and are found in connective tissue. Many different compounds are secreted from basophil granules upon appropriate stimulation. Products such as heparin, histamine, serotonin (5-hydroxytryptamine, 5-HT), and membrane-derived materials which give rise to arachidonic acid metabolites, such as prostaglandins and leukotrienes, are some of the more important compounds released by mast cells. These compounds, when released after stimulation with a variety of molecules, such as IgE, specific antigen anaphylotoxin, as well as the compound 48/80 (C48/80) or calcium ionophore A23187, cause contraction of endothelial cells and mediate atopic or anaphylactic hypersensitivity. In this report, we study the generation of some arachidonic acid products, namely leukotrienes C4, D4, E4, and B4 and the prostaglandins D2 and E2 by rat peritoneal mast cells (RPMC), using calcium ionophore A23187 as a degranulating agonist. We have also studied the new lipoxygenase products, lipoxins A4 and B4, on RPMC secretion using C48/80 as a secretagogue. A rat basophilic leukemia cell line (RBL) was also used to compare results with RPMC. In this paper we have demonstrated that RPMC stimulated with A23187 release LTC4, LTD4, LTE4 and LTB4 and also PGD2 but not PGE2. These results were also confirmed when RBLs were used. In addition, we have shown that mast cells pretreated with LTC4, LTD4, LTE4 or 15-HETE do not modify the release of [3H]5HT exerted by C48/80 (0.5 microgram/ml) or A23187 (5 micrograms/ml). When LXA4 or B4 was used, mast cells were inhibited slightly (not statistically significant) from degranulating after the secretagogue treatment.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0165-2478
pubmed:author
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
117-23
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Role of lipoxins A4 and B4 in the generation of arachidonic acid metabolites by rat mast cells and their effect on [3H]serotonin release.
pubmed:affiliation
Immunology Division, University of Chieti, Italy.
pubmed:publicationType
Journal Article, Comparative Study