Linked Life Data

2154585

Source:http://linkedlifedata.com/resource/pubmed/id/2154585

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1990-3-20
pubmed:abstractText
Gastrin releasing peptide (GRP) is a 27 amino acid hormone that elicits a variety of biological effects. Receptor-binding antagonists of GRP may have therapeutic use in several pathologic conditions including cancer. The identification and characterization of GRP receptor antagonists have been aided by the use of murine 3T3 cells that possess functional GRP receptors. However, no human or primate cell lines that possess high-density GRP receptors and exhibit a biochemical or biological response to GRP have been described. To address this problem, we examined a series of cell lines and found that GRP specifically binds to Cos-7 monkey cells and stimulates elevation of intracellular calcium in these cells. Cos-7 cells exhibit a single class of high-affinity (dissociation constant = 0.13 nM) GRP binding sites (35,000/cell). Cross-linking experiments that use radiolabeled GRP identified two species of putative GRP receptor proteins (relative molecular mass, 90,000 and 22,000). Competitive binding inhibition studies indicate that Cos-7 cells tightly bind GRP-specific receptor antagonists. These antagonists block the binding of radiolabeled GRP to Cos-7 cells and inhibit GRP-stimulated elevation of intracellular calcium. These properties make Cos-7 cells a useful reagent for the study of GRP receptor antagonists.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0027-8874
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
82
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
402-7
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
High-density functional gastrin releasing peptide receptors on primate cells.
pubmed:affiliation
Department of Cancer Research, Merck Sharp and Dohme Research Laboratories, West Point, PA 19486.
pubmed:publicationType
Journal Article