Journal articles
End-binding 1 protein overexpression correlates with glioblastoma progression and sensitizes to Vinca-alkaloids in vitro and in vivo
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.
Cited literature [48 references]
https://hal-amu.archives-ouvertes.fr/hal-01310714
Contributor : Diane Braguer <>
Submitted on : Wednesday, May 4, 2016 - 3:49:20 PM
Last modification on : Tuesday, February 16, 2021 - 3:10:34 AM
Long-term archiving on: : Tuesday, May 24, 2016 - 6:04:03 PM
Contributor : Diane Braguer <>
Submitted on : Wednesday, May 4, 2016 - 3:49:20 PM
Last modification on : Tuesday, February 16, 2021 - 3:10:34 AM
Long-term archiving on: : Tuesday, May 24, 2016 - 6:04:03 PM
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Oncotarget2014Berges.pdf
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