Linked Life Data

2851120

Source:http://linkedlifedata.com/resource/pubmed/id/2851120

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1989-3-1
pubmed:abstractText
Infection of established (IL-3)-dependent hematopoietic cell lines with Abelson murine leukemia virus (A-MLV) abrogates their requirement for IL-3 and leads to non-autocrine growth factor-independent cells. We were interested to determine whether A-MLV can induce IL-3 independence also in non-established cells. To obtain long-term cultures of diploid myelocytes, splenic hematopoietic cells were first infected with MMCV, a murine retrovirus carrying the avian v-myc oncogene. These cultures were superinfected with A-MLV. In three independent experiments, the first growth factor-independent cells appeared between 18 and 43 days after superinfection with A-MLV and represented .02-1% of the population. Furthermore, the cultures that became growth factor-independent were monoclonal for integration of the v-abl gene. These results indicate that the acquisition of growth factor-independence after superinfection of v-myc-expressing cells with A-MLV is a rare event. The low frequency of growth factor-independent cells was not due to a low percentage of infected cells, since 15-25% of the cells were infected with A-MLV after 7 days. The first appearance of growth factor-independent cells coincided with crisis in the cultures, as indicated by a high incidence of cell death and a reduced overall growth rate of the cell populations. These growth factor-independent cells exhibited variable karyotypes, including many that were near-triploid to near-tetraploid. In summary, growth factor-independence induced by super-infection with A-MLV, like that induced by double-infection with v-myc- and v-H-ras-containing viruses, is associated with unstable karyotypes. The growth factor-independent cells show variable ploidy characteristic of cells which survived crisis.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0890-6467
pubmed:author
pubmed:issnType
Print
pubmed:volume
2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
49-63
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
The induction of growth factor-independence in murine myelocytes by oncogenes results in monoclonal cell lines and is correlated with cell crisis and karyotypic instability.
pubmed:affiliation
Molecular Biology and Virology Laboratory, Salk Institute, San Diego, CA 92138.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.