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- W2051068049 abstract "Glioblastoma multiforme (GBM) is the most aggressive and common form of brain cancer in adults and is among the deadliest cancers with a median survival period of 12-14 months. This poor prognosis despite aggressive therapy underscores the need for novel therapeutic targets specifically required by GBM cells. Many GBM are thought to arise from a neural stem cell (NSC) origin and, consistent with this premise, tumor-initiating GBM stem cells (GSCs) isolated from patients retain the NSC-like phenotype and molecular profile of primary tumors. Importantly, unlike serum-cultured cell lines, GSCs retain the developmental potential and specific genetic mutations acquired as each patient9s tumor progressed from its cell of origin. We hypothesized that these genetic alterations driving GBM growth might also give rise to unique molecular vulnerabilities within the cancer cells. To identify such novel gene targets required for GBM cell growth, but which are dispensable to normal cells, we performed genome-scale RNAi screens in multiple patient-derived GSC isolates and simultaneously counter-screened against primary untransformed human NSCs. From these results, we identified and validated the existence of GBM-lethal genes that, when inhibited, render patient GSCs sensitive to cellular stresses arising within these transformed cells. From these targets, we show that GSCs have an increased requirement for the expression and function of multiple specific members of the pre-mRNA splicing machinery. Notably, loss of specific key splicing proteins resulted in cell cycle arrest and subsequent cell death only in GSCs, identifying the spliceosome as a specific molecular vulnerability in GBM. New treatment strategies for this disease are urgently needed. The identification of spliceosomal proteins as essential for the growth and maintenance of GSCs both adds to our understanding of glioblastoma biology and suggests novel targets for therapeutic intervention. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 5118. doi:1538-7445.AM2012-5118" @default.
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- W2051068049 date "2012-04-15" @default.
- W2051068049 modified "2023-10-01" @default.
- W2051068049 title "Abstract 5118: A functional genetic approach in patient-derived glioblastoma stem cells reveals pre-mRNA splicing components to be cancer-lethal gene targets" @default.
- W2051068049 doi "https://doi.org/10.1158/1538-7445.am2012-5118" @default.
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