Publication Date:
1985-03-08
Description:
Transfection of normal human bronchial epithelial (NHBE) cells with a plasmid carrying the ras oncogene of Harvey murine sarcoma virus (v-Ha ras) changed the growth requirements, terminal differentiation, and tumorigenicity of the recipient cells. One of the cell lines isolated after transfection (TBE-1) was studied extensively and shown to contain v-Ha ras DNA. Total cellular RNA from TBE-1 cells hybridized to v-Ha ras structural gene fragment probes five to eight times more than RNA from parental NHBE cells. The TBE-1 cells expressed phosphorylated v-Ha ras polypeptide p21, showed a reduced requirement for growth-factor supplements, and became aneuploid as an early cellular response to v-Ha ras expression. As the transfectants acquire an indefinite life-span and anchorage independence they became transplantable tumor cells and showed many phenotypic changes suggesting a pleiotropic mechanism for the role of Ha ras in human carcinogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoakum, G H -- Lechner, J F -- Gabrielson, E W -- Korba, B E -- Malan-Shibley, L -- Willey, J C -- Valerio, M G -- Shamsuddin, A M -- Trump, B F -- Harris, C C -- New York, N.Y. -- Science. 1985 Mar 8;227(4691):1174-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3975607" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Bronchi/*cytology/microbiology
;
Carcinoma, Bronchogenic/genetics
;
Cell Line
;
Cell Transformation, Neoplastic/metabolism
;
*Cell Transformation, Viral
;
Culture Media
;
DNA, Neoplasm/genetics
;
Epithelial Cells
;
Epithelium/microbiology
;
Humans
;
Lung Neoplasms/genetics
;
Mice
;
Mice, Nude
;
Nucleic Acid Hybridization
;
*Oncogenes
;
Rats
;
*Transfection
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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