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• W2635622685 abstract "Abstract Glioblastoma multiforme (GBM) is the most common primary malignant brain tumor and accounts for a significant proportion of all primary brain tumors. Median survival after treatment is around 15 months. Remodeling of N-glycans by the N-acetylglucosamine glycosyltransferase (MGAT5) regulates tumoral development. Here, perturbation of MGAT5 enzymatic activity by the small-molecule inhibitor 3-hydroxy-4,5-bis-benzyloxy-6-benzyloxymethyl-2-phenyl2-oxo-2λ5-[1,2]oxaphosphinane (PST3.1a) restrains GBM growth. In cell-based assays, it is demonstrated that PST3.1a alters the β1,6-GlcNAc N-glycans of GBM-initiating cells (GIC) by inhibiting MGAT5 enzymatic activity, resulting in the inhibition of TGFβR and FAK signaling associated with doublecortin (DCX) upregulation and increase oligodendrocyte lineage transcription factor 2 (OLIG2) expression. PST3.1a thus affects microtubule and microfilament integrity of GBM stem cells, leading to the inhibition of GIC proliferation, migration, invasiveness, and clonogenic capacities. Orthotopic graft models of GIC revealed that PST3.1a treatment leads to a drastic reduction of invasive and proliferative capacity and to an increase in overall survival relative to standard temozolomide therapy. Finally, bioinformatics analyses exposed that PST3.1a cytotoxic activity is positively correlated with the expression of genes of the epithelial–mesenchymal transition (EMT), while the expression of mitochondrial genes correlated negatively with cell sensitivity to the compound. These data demonstrate the relevance of targeting MGAT5, with a novel anti-invasive chemotherapy, to limit glioblastoma stem cell invasion. Mol Cancer Res; 15(10); 1376–87. ©2017 AACR." @default.
• W2635622685 created "2017-06-30" @default.
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• W2635622685 date "2017-10-01" @default.
• W2635622685 modified "2023-10-16" @default.
• W2635622685 title "Phostine PST3.1a Targets MGAT5 and Inhibits Glioblastoma-Initiating Cell Invasiveness and Proliferation" @default.
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• W2635622685 doi "https://doi.org/10.1158/1541-7786.mcr-17-0120" @default.
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