Linked Life Data

2431072

Source:http://linkedlifedata.com/resource/pubmed/id/2431072

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1987-1-6
pubmed:abstractText
In earlier studies, it was shown that the human plasma-spreading glycoprotein, epibolin (the 65 kD species of serum-spreading factor or vitronectin), requires a second plasma component, termed coepibolin, in order to support maximal dissociated epidermal cell spreading in tissue culture. Whereas epibolin alone in defined medium supports some cell spreading, the purified plasma coepibolin preparations do not effect spreading in the absence of epibolin. Although not yet entirely purified, coepibolin associates with some plasma fractions but not with others; it is certainly not a property of all proteins, e.g., while bovine serum albumin (BSA) has coepibolin activity, ovalbumin does not. The data presented here show that the phorbol ester, 12-tetra-decanoyl-1-phorbol-13-acetate (TPA) can act as a potent coepibolin and support maximal spreading over a concentration range of 10-100 ng/ml. In the absence of epibolin TPA does not stimulate the spreading of epidermal cells when given alone or in the presence of BSA or ovalbumin. Coepibolin activity appears to associate with tumor-promoting activity in that the phorbol derivative, phorbol-12,13-didecanoate, shows coepibolin activity, while its inactive non-tumor-promoting isomer, phorbol-4 alpha-phorbol-12,13-didecanoate, does not. These data suggest that the proteinaceous plasma-derived cofactor acts in a fashion similar to TPA and that this as yet unexplained mechanism of TPA action is important to the full expression of epibolin and to the early phase of epidermal cell spreading.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
87
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
754-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Phorbol ester serves as a coepibolin in the spreading of primary guinea pig epidermal cells.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't