Project description:Mouse genetic crosses were established between the PyMT model of metastatic breast cancer and the G7 generation of the Diversity Outcross (DO). Tumors were harvested from the animals for gene expression analysis to identify genes association with progression to distant metastatic disease. Gene expression of 159 samples from the PyMT x Diversity Outcross were assayed on Affymetrix chips.
Project description:The aim of this investigation was to study the consequences of interfering with soluble epoxide hydrolase (sEH) expression on tumor growth and metastasis in genetically modified animals that spontaneously generate tumors without the exogenous application of high concentrations of epoxide mediators or inhibitors. Therefore, breast cancer development was studied in mice expressing the polyoma middle T oncogene (PyMT) under the control of the mouse mammary tumor virus promoter, to induce spontaneous mammary tumors. To facilitate the study of endogenous sEH activity in tumor growth, PyMT mice were then crossed with sEH-/- mice to generate sEH-deficient mice that spontaneously generate breast tumors (so called PyMTsEH mice). For these analyses, primary tumors were removed from 20 week old mice.
