title: Extended life span and tumorigenicity of nonestablished mouse connective tissue cells transformed by the fos oncogene of FBR-MuSV.
abstract: We have analyzed the transforming potential of two fos oncogene products in nonestablished cultures of mouse connective tissue cells: p55fos of FBJ-MuSV and p75gag-fos of FBR-MuSV. Although both proteins induced morphological transformation and colony formation at low cell density in a G418 resistance selection assay, p75gag-fos exhibited more pronounced transforming potential than p55fos. In addition, p75gag-fos-transformed cells overcame crisis with a high probability and were tumorigenic in syngenic mice. These properties of the FBR-MuSV appear to be linked to structural alterations in the p75gag-fos oncogene product. Polyoma virus large T protein complemented the transforming potential of fos, in that it not only increased the probability of establishment of fos-transformed cells but also enhanced fos-induced morphological transformation. Our results suggest that different oncogenes affect morphological transformation, low cell density growth, establishment, and tumorigenicity to various degrees.
authors.forename: T
authors.initials: T
authors.lastname: Jenuwein
authors.forename: D
authors.initials: D
authors.lastname: Müller
authors.forename: T
authors.initials: T
authors.lastname: Curran
authors.forename: R
authors.initials: R
authors.lastname: Müller
mesh_terms: D000818:Animals; D000952:Antigens, Polyomavirus Transforming; D000957:Antigens, Viral, Tumor / Q000096:biosynthesis / Q000502:physiology*; D002452:Cell Count; D002460:Cell Line; D002470:Cell Survival; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D002478:Cells, Cultured; D002999:Clone Cells; D003239:Connective Tissue Cells; D005347:Fibroblasts; D005814:Genes, Viral; D051379:Mice; D009857:Oncogenes; D012516:Osteosarcoma; D010641:Phenotype; D009053:Sarcoma Viruses, Murine / Q000235:genetics*; D014162:Transfection; D014764:Viral Proteins / Q000096:biosynthesis / Q000502:physiology*
chemical_list: D000952:Antigens, Polyomavirus Transforming; D000957:Antigens, Viral, Tumor; D014764:Viral Proteins