Mizuki K, Nose K, Okamoto H, Tsuchida N, Hayashi K. Amplification of c-Ki-ras gene and aberrant expression of c-myc in WI-38 cells transformed in vitro by gamma-irradiation.
Biochem Biophys Res Commun 1985;
128:1037-43. [PMID:
2581563 DOI:
10.1016/0006-291x(85)90152-4]
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Abstract
The expression of c-oncogenes was examined with normal human fibroblasts (WI-38) and the cells transformed in vitro by gamma-irradiation (CT-1). The amount of Ki-ras-specific mRNA in CT-1 cells was found to be approximately twice that in WI-38 cells. By Southern blot hybridization, the c-Ki-ras 2 gene of CT-1 cells was found to be amplified about two-fold. CT-1 cells have higher levels of c-myc mRNA than normal cells, although the gene dosage and the restriction nuclease pattern of the c-myc gene was the same. The content of c-myc mRNA in CT-1 cells was found to be constitutively high, whereas that in normal cells was increased by serum addition.
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