EFEMP1 induces γ-secretase/Notch-mediated temozolomide resistance in glioblastoma

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EFEMP1 induces γ-secretase/Notch-mediated temozolomide resistance in glioblastoma

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Title: EFEMP1 induces γ-secretase/Notch-mediated temozolomide resistance in glioblastoma
Author: Hiddingh, Lotte; Tannous, Bakhos A.; Teng, Jian; Tops, Bas; Jeuken, Judith; Hulleman, Esther; Boots-Sprenger, Sandra H.; Vandertop, W. Peter; Noske, David P.; Kaspers, Gertjan J.L.; Wesseling, Pieter; Wurdinger, Thomas

Note: Order does not necessarily reflect citation order of authors.

Citation: Hiddingh, L., B. A. Tannous, J. Teng, B. Tops, J. Jeuken, E. Hulleman, S. H. Boots-Sprenger, et al. 2014. “EFEMP1 induces γ-secretase/Notch-mediated temozolomide resistance in glioblastoma.” Oncotarget 5 (2): 363-374.
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Abstract: Glioblastoma is the most common malignant primary brain tumor. Temozolomide (TMZ) is the standard chemotherapeutic agent for this disease. However, intrinsic and acquired TMZ-resistance represents a major obstacle for this therapy. In order to identify factors involved in TMZ-resistance, we engineered different TMZ-resistant glioblastoma cell lines. Gene expression analysis demonstrated that EFEMP1, an extracellular matrix protein, is associated with TMZ-resistant phenotype. Silencing of EFEMP1 in glioblastoma cells resulted in decreased cell survival following TMZ treatment, whereas overexpression caused TMZ-resistance. EFEMP1 acts via multiple signaling pathways, including γ-secretase-mediated activation of the Notch pathway. We show that inhibition of γ-secretase by RO4929097 causes at least partial sensitization of glioblastoma cells to temozolomide in vitro and in vivo. In addition, we show that EFEMP1 expression levels correlate with survival in TMZ-treated glioblastoma patients. Altogether our results suggest EFEMP1 as a potential therapeutic target to overcome TMZ-resistance in glioblastoma.
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3964213/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12064495
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