We defined more precisely the gains in 17q12-q24, finding as strong candidates for ovarian tumorigenesis the genes LASP1 (17q12), TGF11 (17q21.32), MUL (17q23.2), TBX2 (17q23.2), AXIN2 (17q24.3) and GRB2 (17q25.1).
To assess the role of these molecules in mammary epithelial development and tumorigenesis, we have generated transgenic mice which individually express the Grb2 and Shc proteins in the mammary epithelium.
These findings implicate activation of Ras function as an important component in BCR-ABL-mediated transformation and demonstrate that GRB-2not only functions in normal development and mitogenesis but also plays a role in oncogenesis.