Cordero, AlexSantamaría, Patricia GGonzález-Suárez, Eva2024-04-042024-04-042023-02-18J Mammary Gland Biol Neoplasia . 2023 ;28(1):2http://hdl.handle.net/20.500.12105/19119Determination of the mammary epithelial cell that serves as the cell of origin for breast cancer is key to understand tumor heterogeneity and clinical management. In this study, we aimed to decipher whether Rank expression in the presence of PyMT and Neu oncogenes might affect the cell of origin of mammary gland tumors. We observed that Rank expression in PyMT+/- and Neu+/- mammary glands alters the basal and luminal mammary cell populations already in preneoplasic tissue, which may interfere with the tumor cell of origin restricting their tumorigenesis ability upon transplantation assays. In spite of this, Rank expression eventually promotes tumor aggressiveness once tumorigenesis is established.engVoREctopic Gene ExpressionMammary Neoplasms, ExperimentalAnimalsHumansMiceCarcinogenesisEpithelial CellsOncogenesMice, TransgenicAttribution-NonCommercial-NoDerivatives 4.0 Internacional36808257281210.1007/s10911-023-09530-41573-7039Journal of mammary gland biology and neoplasiaopen access