[Detection of cellular proto-oncogenes and oncogenes].

Detection of proto-oncogenes in normal cells and oncogenes in cells of solid tumors and in leukemic cells confirmed the assumption on the genetic basis of neoplastic cell transformation. Proto-oncogenes constitute a specific group of genes involved in physiological processes of the cell. Inappropriately expressed forms of proto-oncogenes are referred to as oncogenes. Proto-oncogenes and oncogenes were detected either by means of animal oncogenic viruses, in in vitro transfection experiments, or by means of some cytological methods revealing chromosomal abnormalities. Proto-oncogenes were detected in cells of phylogenetically very distant species, suggesting their importance in the regulation of the cell cycle.