Linked Life Data

2974286

Source:http://linkedlifedata.com/resource/pubmed/id/2974286

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1989-1-25
pubmed:abstractText
Both thromboxane A2 (TXA2) and its precursor prostaglandin H2 (PGH2) are labile and share a common receptor. The affinities of these two compounds for their putative common receptor are unknown. We compared the potencies of TXA2 and PGH2 to aggregate human platelets and bind to the TXA2/PGH2 receptor. TXA2 was more potent than PGH2 in initiating aggregation in platelet-rich plasma, EC50 of 66 +/- 15 nM and 2.5 +/- 1.3 microM, respectively. In washed platelets, however, PGH2 was more potent than TXA2 with EC50 values of 45 +/- 2 nM and 163 +/- 21 nM, respectively. The affinity of these two compounds in washed platelets was determined in radioligand competition binding assays employing [125I]-PTA-OH. The Kd values for PGH2 and TXA2 were 43 nM and 125 nM, respectively. The results demonstrate that the affinity of PGH2 for the platelet TXA2/PGH2 receptor is greater than previously thought. The data raise the possibility that PGH2 may significantly contribute to the responses attributed to TXA2 in vivo.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0006-291X
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
157
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
733-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
The affinities of prostaglandin H2 and thromboxane A2 for their receptor are similar in washed human platelets.
pubmed:affiliation
Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston 29425.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't