TY - JOUR
T1 - Specific growth response of ras-transformed embryo fibroblasts to tumour promoters
AU - Paolo Dotto, Gian
AU - Parada, Luis F.
AU - Weinberg, Robert A.
PY - 1985
Y1 - 1985
N2 - Chemical carcinogenesis is a process involving multiple steps, as shown in several in vivo experimental systems1. Two early steps have been well characterized: initiation, achieved by a single, subthreshold dose of a carcinogen, and promotion, induced by repetitive treatments with a non-carcinogenic tumour promoter. At the cellular level, establishment of the transformed phenotype is also a multi-step process and activation of several, independent genes appears to be required2-4. Here we show that, like initiated cells, primary rat embryo fibroblasts (REFs) containing a ras but not a myc oncogene, are strongly and specifically stimulated to grow by tumour promoters. In the presence of these promoters, ras-containing REFs acquire the ability to overgrow normal cells in the monolayer and to form foci with 100% efficiency. Similar to the in vivo situation, promoter effects can be blocked by the concomitant application of retinoic acid.
AB - Chemical carcinogenesis is a process involving multiple steps, as shown in several in vivo experimental systems1. Two early steps have been well characterized: initiation, achieved by a single, subthreshold dose of a carcinogen, and promotion, induced by repetitive treatments with a non-carcinogenic tumour promoter. At the cellular level, establishment of the transformed phenotype is also a multi-step process and activation of several, independent genes appears to be required2-4. Here we show that, like initiated cells, primary rat embryo fibroblasts (REFs) containing a ras but not a myc oncogene, are strongly and specifically stimulated to grow by tumour promoters. In the presence of these promoters, ras-containing REFs acquire the ability to overgrow normal cells in the monolayer and to form foci with 100% efficiency. Similar to the in vivo situation, promoter effects can be blocked by the concomitant application of retinoic acid.
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U2 - 10.1038/318472a0
DO - 10.1038/318472a0
M3 - Article
C2 - 4069218
AN - SCOPUS:0022368305
SN - 0028-0836
VL - 318
SP - 472
EP - 475
JO - Nature
JF - Nature
IS - 6045
ER -