Abstract

The studies of oncogene dependence are aimed to understand an unfortunate and puzzling aspect of targeted anticancer treatments-their progression to drug resistance. Drug resistance develops from a pool of cells that survive the original treatment, called minimal residual disease. Mouse models based on tetracycline-dependent expression of transgenic oncogenes are used to imitate targeted oncogene blockade and to reproduce minimal residual disease in humans. Here we describe a novel method for generating oncogene-dependent mammary tumors using somatic transfer of transactivator-containing retroviruses into transgenic mice with tetracycline-dependent oncogenes and a method for measuring continuous mitotic activity in epithelial cells in real time.

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