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- W1497014525 abstract "// Raphael Berges 1 , Nathalie Baeza-Kallee 1 , Emeline Tabouret 1, 2 , Olivier Chinot 1, 2 , Marie Petit 1, 2 , Anna Kruczynski 3 , Dominique Figarella-Branger 1, 2 , Stephane Honore 1, 2 , Diane Braguer 1, 2 1 Aix-Marseille Université, INSERM, CRO2 UMR_S 911, Marseille 13385, France 2 APHM, CHU Timone, Marseille 13385, France 3 Centre de Recherche d'Oncologie Expérimentale, Institut de Recherche Pierre Fabre, Toulouse, France Correspondence to: Diane Braguer, e-mail: diane.braguer@univ-amu.fr Keywords: glioblastoma, EB1, biomarker, Vinca -alkaloid, microtubules Received: July 03, 2014 Accepted: October 26, 2014 Published: November 28, 2014 ABSTRACT End-binding 1 protein (EB1) is a key player in the regulation of microtubule (MT) dynamics. Here, we investigated the role of EB1 in glioblastoma (GBM) tumor progression and its potential predictive role for response to Vinca -alkaloid chemotherapy. Immunohistological analysis of the 109 human GBM cases revealed that EB1 overexpression correlated with poor outcome including progression-free survival and overall survival. Downregulation of EB1 by shRNA inhibited cell migration and proliferation in vitro . Conversely, EB1 overexpression promoted them and accelerated tumor growth in orthotopically-transplanted nude mice. Furthermore, EB1 was largely overexpressed in stem-like GBM6 that display in vivo a higher tumorigenicity with a more infiltrative pattern of migration than stem-like GBM9. GBM6 showed strong and EB1-dependent migratory potential. The predictive role of EB1 in the response of GBM cells to chemotherapy was investigated. Vinflunine and vincristine increased survival of EB1-overexpressing U87 bearing mice and were more effective to inhibit cell migration and proliferation in EB1-overexpressing clones than in controls. Vinca inhibited the increase of MT growth rate and growth length induced by EB1 overexpression. Altogether, our results show that EB1 expression level has a prognostic value in GBM, and that Vinca -alkaloid chemotherapy could improve the treatment of GBM patients with EB1-overexpressing tumor." @default.
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- W1497014525 date "2014-11-28" @default.
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- W1497014525 title "End-binding 1 protein overexpression correlates with glioblastoma progression and sensitizes to<i>Vinca</i>-alkaloids<i>in vitro</i>and<i>in vivo</i>" @default.
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- W1497014525 doi "https://doi.org/10.18632/oncotarget.2646" @default.
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