Linked Life Data

3803452

Source:http://linkedlifedata.com/resource/pubmed/id/3803452

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-3-11
pubmed:abstractText
We have examined the expression of the transformed phenotype in a series of clonal lines of NIH/3T3 cells transfected with the human c-Ha-rasVal 12 oncogene and the neomycin phosphotransferase gene. Cells from individual transformed foci were cloned and subjected to detailed analyses of the ras sequences. Three clones were found that expressed approximately one, 2-4, or 4-8 copies of the human c-ras oncogene, respectively. A fourth clone had multiple copies of the transfected sequences, and expressed abundant c-Ha-ras RNA. Analysis of the transformed phenotype of various clones indicated that cells expressing low levels of mutant c-Ha-ras had lost some of their extracellular fibronectin network, and were barely altered in their cytoskeleton. In contrast, cells expressing abundant c-Ha-ras had lost both their actin and fibronectin networks and showed an increase in plasminogen activator activity. Cells with amplified c-Ha-rasVal 12 grew better in low serum, formed large colonies in soft agar and showed enhanced activity of ornithine decarboxylase, the rate-controlling enzyme in polyamine biosynthesis. These results show that the dosage level of the mutant oncogene makes a significant contribution to the transformed phenotype of c-Ha-ras oncogene-transformed cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0014-4827
pubmed:author
pubmed:issnType
Print
pubmed:volume
168
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
518-30
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Dose effects of transfected c-Ha-rasVal 12 oncogene in transformed cell clones.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't