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- W2395168045 abstract "To discover mechanisms that mediate the initiation and progression of aggressive and stem-like breast cancers, we characterized signaling networks that are present in the mammary stem cells responsible for fetal and adult mammary development. These analyses identified a signaling axis between FGF signaling and the transcription factor, Sox10. Here we report that Sox10 is specifically expressed in mammary cells that exhibit the highest levels of stem/progenitor activity. This includes fetal and adult mammary cells in vivo and mammary organoids in vitro. Sox10 is functionally relevant, as its deletion reduces stem/progenitor competence, while its overexpression increases stem/progenitor activity. Intriguingly, we also discover that Sox10 overexpression elicits epithelial-to-mesenchymal transition (EMT) in mammary organoids in an FGF signaling-dependent manner. Further, modulation of Sox10 levels can induce sequential EMT, migratory, and clonogenic behaviors that strikingly resemble proposed mechanisms of metastasis. Consistent with these findings, we find that Sox10 is preferentially expressed in the most stem- and EMT-like triple negative breast cancer subtypes, and that Sox10+ tumor cells utilize FGF signaling for growth and invasive behaviors, which suggest that Sox10 may reprise these same functions during tumorigenesis. Collectively, these results demonstrate a signaling mechanism through which stem and mesenchymal-like states are acquired in mammary cells, and indicate possible therapeutic targets to counter these functions in breast cancers for which targeted therapies are currently unavailable. Citation Format: Christopher Dravis, Geoffrey M. Wahl. Sox10 regulates stem/progenitor and mesenchymal cell states in mammary epithelial cells. [abstract]. In: Proceedings of the AACR Special Conference on Advances in Breast Cancer Research; Oct 17-20, 2015; Bellevue, WA. Philadelphia (PA): AACR; Mol Cancer Res 2016;14(2_Suppl):Abstract nr IA10." @default.
- W2395168045 created "2016-06-24" @default.
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- W2395168045 date "2016-02-01" @default.
- W2395168045 modified "2023-09-25" @default.
- W2395168045 title "Abstract IA10: Sox10 regulates stem/progenitor and mesenchymal cell states in mammary epithelial cells" @default.
- W2395168045 doi "https://doi.org/10.1158/1557-3125.advbc15-ia10" @default.
- W2395168045 hasPublicationYear "2016" @default.
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