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Baratta, Maria Giuseppina; Schinzel, Anna C.; Zwang, Yaara; Bandopadhayay, Pratiti; Bowman-Colin, Christian; Kutt, Jennifer; Curtis, Jennifer; Piao, Huiying; Wong, Laura C.; Kung, Andrew L.; Beroukhim, Rameen; Bradner, James E.; Drapkin, Ronny; Hahn, William C.; Liu, Joyce F.; Livingston, David M.
Proceedings of the National Academy of Sciences - PNAS, 01/2015, Letnik: 112, Številka: 1Journal Article
High-grade serous ovarian carcinoma (HGSOC) is the most common and aggressive form of epithelial ovarian cancer, for which few targeted therapies exist. To search for new therapeutic target proteins, we performed an in vivo shRNA screen using an established human HGSOC cell line growing either subcutaneously or intraperitoneally in immunocompromised mice. We identified genes previously implicated in ovarian cancer such asAURKA1, ERBB3, CDK2, andmTOR, as well as several novel candidates includingBRD4, VRK1, andGALK2.We confirmed, using both genetic and pharmacologic approaches, that the activity ofBRD4,an epigenetic transcription modulator, is necessary for proliferation/survival of both an established human ovarian cancer cell line (OVCAR8) and a subset of primary serous ovarian cancer cell strains (DFs). Among the DFs tested, the strains sensitive to BRD4 inhibition revealed elevated expression of eitherMYCNorc-MYC, withMYCNexpression correlating closely with JQ1 sensitivity. Accordingly, primary human xenografts derived from high-MYCN or c-MYC strains exhibited sensitivity to BRD4 inhibition. These data suggest that BRD4 inhibition represents a new therapeutic approach for MYC-overexpressing HGSOCs.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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