Linked Life Data

3923567

Source:http://linkedlifedata.com/resource/pubmed/id/3923567

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1985-7-12
pubmed:abstractText
The contractions elicited by leukotriene (LT) C4 and D4 in isolated guinea pig trachea were characterized under conditions in which LTC4 to LTD4 metabolism was blocked by the presence of 45 mM l-serine-borate complex (SB). The presence of SB caused a shift of the LTC4-concentration-response curve to the left by 7.5-fold, and blocked the bioconversion of LTC4 to LTD4 by the trachea as estimated by HPLC analysis of the LTs present in the tissue bath fluid. The potency of FPL 55712 as an antagonist of the LTC4-induced contractions in the presence of SB was 15-30-fold less than its potency as an antagonist of the LTD4-induced contractions. In contrast, another LT antagonist, SK&F 101132, equally antagonized the contractions elicited by LTC4 and LTD4 in either the presence or absence of SB. The differential antagonism of LTC4 and LTD4 implies the existence of multiple pharmacologic receptors for the LTs. The calcium channel entry blockers, nifedipine and verapamil, at concentrations as high as 10 microM, suppressed the maximal LTC4-induced contraction by no more than 20%, whereas the purported intracellular calcium antagonist, TMB-8, completely suppressed the LTC4 concentration-response curve in the presence of SB, a profile identical to that previously reported for LTD4. Thus, if multiple LT receptors exist, they appear to mobilize calcium in a qualitatively similar fashion following LT stimulation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0090-6980
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
547-60
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Differentiation of the mechanisms by which leukotrienes C4 and D4 elicit contraction of the guinea pig trachea.
pubmed:publicationType
Journal Article, In Vitro