Linked Life Data

8191926

Source:http://linkedlifedata.com/resource/pubmed/id/8191926

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1994-6-23
pubmed:abstractText
It is now widely accepted that insulin-like growth factor-I (IGF-I) has a local regulatory role in bone remodeling. IGF-I has also been demonstrated to regulate proliferation of bone-derived endothelial cells. Such studies suggest a role of IGF-I in skeletal angiogenesis. Using BBE cells, a bovine bone endothelial cell line, we characterized the kinetics and chemical properties of IGF-I receptors and examined the effect of IGF-I on bone endothelium migration. Two classes of binding sites with high affinity for IGF-I were detected by binding experiments on bone endothelial cells. Both competition analyses and cross-linking studies revealed the presence of type I IGF receptor in bone endothelial cells. Moreover, these cells produced and released authentic IGF-I into the medium, as evidenced by radioimmunoassay analyses of gel-filtered conditioned media. Both IGF-I binding capacity and release decreased either with increases in cell number or after treatment with 17 beta-estradiol (17 beta E2) and parathyroid hormone (PTH). Both hormones also inhibited chemotactic responses of bone endothelial cells to IGF-I. Taken together, these results strongly suggest that IGF-I, a growth factor that promotes the proliferation of various bone cell types, also induces growth and chemotactic responses in bone endothelium acting through the type I IGF receptor. This may be part of a generalized response of bone cells to IGF-I that facilitates cell migration.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0884-0431
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
329-37
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Characterization, regulation, and function of specific cell membrane receptors for insulin-like growth factor I on bone endothelial cells.
pubmed:affiliation
Department of Clinical Physiopathology, University of Florence, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't