title: Abrogation of IL-3 and IL-2 dependence by recombinant murine retroviruses expressing v-myc oncogenes.
abstract: Several oncogenes are thought to cause transformation by affecting the signal transmission pathway of growth factors. One example is the induction of c-myc, the cellular homologue of the avian transforming oncogene v-myc, by platelet-derived growth factor (PDGF) among a set of genes associated with competence induction in fibroblasts. Another of the competence genes, r-fos, has been shown to be related to v-fos, the transforming gene of the FBJ sarcoma virus. In addition, PDGF induces c-fos, the cellular homologue of v-fos. The importance of c-myc induction is suggested by the observation that c-myc, under the control of a glucocorticoid regulator, can partially relieve the requirement of fibroblasts for PDGF. We have examined the effects of oncogenes on haematopoietic/lymphoid cell differentiation, immortalization and factor dependence for growth. Here we report the effects of recombinant murine retroviruses capable of expressing the avian v-myc. With interleukin-3 (IL-3)- or interleukin-2 (IL-2)-dependent cells, the viruses abrogated the requirement for growth factors and suppressed c-myc expression.
mesh_terms: D000818:Animals; D002460:Cell Line; D002472:Cell Transformation, Viral; D005786:Gene Expression Regulation; D007376:Interleukin-2 / Q000378:metabolism*; D007377:Interleukin-3; D008222:Lymphokines / Q000378:metabolism*; D051379:Mice; D009857:Oncogenes; D010455:Peptides / Q000235:genetics; D010982:Platelet-Derived Growth Factor / Q000235:genetics; D012190:Retroviridae / Q000235:genetics / Q000254:growth & development*; D015291:Transforming Growth Factors
chemical_list: D007376:Interleukin-2; D007377:Interleukin-3; D008222:Lymphokines; D010455:Peptides; D010982:Platelet-Derived Growth Factor; D015291:Transforming Growth Factors