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The regulatory factors governing adult mesenchymal stem cell (MSC) physiology and their tumorigenic potential are still largely unknown, which substantially delays the identifi cation of effective therapeutic approaches for the treatment of aggressive and lethal forms of MSC-derived mesenchymal tumors, such as undifferentiated sarcomas. Here, we have developed a novel platform to screen and quickly identify genes and pathways responsible for adult MSC transformation, modeled undifferentiated sarcoma in vivo , and, ultimately, tested the effi cacy of targeting the identifi ed oncopathways. Importantly, by taking advantage of this new platform, we demonstrate the key role of an aberrant LRF–DLK1–SOX9 pathway in the pathogenesis of undifferentiated sarcoma, with important therapeutic implications. SIGNIFICANCE: The paucity of therapeutic options for the treatment of sarcoma calls for a rapid and effective preclinical assessment of new therapeutic modalities. We have here developed a new platform to deconstruct the molecular genetics underlying the pathogenesis of sarcoma and to evaluate in vivo the effi cacy of novel targeted therapies. Cancer Discov; 5(4); 396–409. ©2015 AACR.

A genetic platform to model sarcomagenesis from primary adult mesenchymal stem cells / Guarnerio, Jlenia; Riccardi, Luisa; Taulli, Riccardo; Maeda, Takahiro; Wang, Guocan; Hobbs, Robin M.; Song, Min Sup; Sportoletti, Paolo; Bernardi, Rosa; Bronson, Roderick T.; Castillo Martin, Mireia; Cordon Cardo, Carlos; Lunardi, Andrea; Pandolfi, Pier Paolo. - In: CANCER DISCOVERY. - ISSN 2159-8274. - 5:4(2015), pp. 396-409.

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