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• W2213440919 abstract "// Matteo Setti 1, * , Daniela Osti 1, * , Cristina Richichi 1 , Barbara Ortensi 1 , Massimiliano Del Bene 2 , Lorenzo Fornasari 1 , Galina Beznoussenko 3 , Alexandre Mironov 3 , Germana Rappa 1 , Alessandro Cuomo 1 , Mario Faretta 1 , Tiziana Bonaldi 1 , Aurelio Lorico 4 , Giuliana Pelicci 1, 5 1 Department of Experimental Oncology, European Institute of Oncology, Milan, Italy 2 Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico C. Besta, Milan, Italy 3 Institute of Molecular Oncology (IFOM) of the Italian Foundation for Cancer Research (FIRC), Milan, Italy 4 Cancer Research Center, Roseman University of Health Sciences with Roseman University College of Medicine, Las Vegas, NV, USA 5 Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy * These authors have contributed equally to this work Correspondence to: Giuliana Pelicci, e-mail: giuliana.pelicci@ieo.eu Keywords: glioblastoma, cancer stem cells, extracellular vesicles, cell proliferation, tumor growth Received: April 28, 2015      Accepted: September 18, 2015      Published: September 30, 2015 ABSTRACT Little progresses have been made in the treatment of glioblastoma (GBM), the most aggressive and lethal among brain tumors. Recently we have demonstrated that Chloride Intracellular Channel-1 (CLIC1) is overexpressed in GBM compared to normal tissues, with highest expression in patients with poor prognosis. Moreover, CLIC1-silencing in cancer stem cells (CSCs) isolated from human GBM patients negatively influences proliferative capacity and self-renewal properties in vitro and impairs the in vivo tumorigenic potential. Here we show that CLIC1 exists also as a circulating protein, secreted via extracellular vesicles (EVs) released by either cell lines or GBM-derived CSCs. Extracellular vesicles (EVs), comprising exosomes and microvesicles based on their composition and biophysical properties, have been shown to sustain tumor growth in a variety of model systems, including GBM. Interestingly, treatment of GBM cells with CLIC1-containing EVs stimulates cell growth both in vitro and in vivo in a CLIC1-dose dependent manner. EVs derived from CLIC1-overexpressing GBM cells are strong inducers of proliferation in vitro and tumor engraftment in vivo . These stimulations are significantly attenuated by treatment of GBM cells with EVs derived from CLIC1-silenced cells. However, CLIC1 modulation appears to have no direct role in EV structure, biogenesis and secretion. These findings reveal that, apart from the function of CLIC1 cellular reservoir, CLIC1 contained in EVs is a novel regulator of GBM growth." @default.
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• W2213440919 date "2015-09-30" @default.
• W2213440919 modified "2023-10-16" @default.
• W2213440919 title "Extracellular vesicle-mediated transfer of CLIC1 protein is a novel mechanism for the regulation of glioblastoma growth" @default.
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• W2213440919 doi "https://doi.org/10.18632/oncotarget.5105" @default.
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