title: [Model systems of carcinogenesis in vitro: the interaction of the ras oncogene with immortalized cells].
abstract: Gene transfer experiments have shown that ras effector functions are sufficient to transform cells from a variety of established lines (e. g., mouse NIH3T3 cells). In contrast, primary cells and early passage rodent cells can be transformed by ras oncogenes only at low frequencies, unless cotransfected with collaborating genes such as adenovirus early region IA (EIA) or myc retroviral oncogene homologue. Primary rat embryo fibroblasts (REF) were chosen as a model for the analysis of multistep cellular transformation. Transfection of REF, immortalized by early region of simian adenovirus SA7 with c-Ha-ras oncogene cannot induce their morphological transformation. This phenomenon is observed only after second transfection with the same oncogene. These different cell lines can be used for further analysis of the mechanisms of carcinogenesis.
authors.forename: L Z
authors.initials: LZ
authors.lastname: Topol'
authors.forename: D D
authors.initials: DD
authors.lastname: Spitkovskiĭ
authors.forename: F L
authors.initials: FL
authors.lastname: Kiselev
mesh_terms: D000261:Adenoviruses, Simian / Q000235:genetics; D000818:Animals; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D004273:DNA, Neoplasm / Q000235:genetics; D004195:Disease Models, Animal; D011905:Genes, ras; D051379:Mice; D008819:Mice, Nude; D009374:Neoplasms, Experimental / Q000209:etiology* / Q000235:genetics; D051381:Rats; D011916:Rats, Inbred F344; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D004273:DNA, Neoplasm
vernacular_title: Model'nye sistemy kantserogeneza in vitro: vzaimodeĭstvie onkogena ras s immortalizovannymi kletkami.