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• W2938133145 abstract "ABSTRACT Oncogenesis of Ewing sarcoma (EwS), the second most common malignant bone tumor of childhood and adolescence, is dependent on the expression of chimeric EWSR1-ETS fusion oncogenes, most often EWSR1-FLI1 (E/F). E/F expression leads to dysregulation of focal adhesions (FAs) enhancing the migratory capacity of EwS cells. Here we show that, in EwS cell lines and tissue samples, focal adhesion kinase (FAK) is expressed and phosphorylated at Y397 in an E/F-dependent way involving Ezrin. Employing different EwS cell as in vitro models, we found that key malignant properties of E/F are mediated via substrate-independent autophosphorylation of FAK on Y397. This phosphorylation results in enhanced FA formation, Rho-dependent cell migration, and impaired caspase-3-mediated apoptosis in vitro . Conversely, treatment with the FAK inhibitor Y15 enhanced caspase-mediated apoptosis and EwS cell migration, independent from the respective EWSR1-ETS fusion type, mimicking an anoikis-like phenotype. Our findings were confirmed in vivo using an avian chorioallantoic membrane (CAM) model. Our results provide a first rationale for the therapeutic use of FAK inhibitors to impair metastatic dissemination of EwS." @default.
• W2938133145 created "2019-04-25" @default.
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• W2938133145 date "2019-04-09" @default.
• W2938133145 modified "2023-09-26" @default.
• W2938133145 title "Focal adhesion kinase confers pro-migratory and anti-apoptotic properties and is a potential therapeutic target in Ewing sarcoma" @default.
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• W2938133145 doi "https://doi.org/10.1101/604207" @default.
• W2938133145 hasPublicationYear "2019" @default.
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