title: Maintenance of EGFR and EGFRvIII expressions in an in vivo and in vitro model of human glioblastoma multiforme.
abstract: Glioblastoma multiforme (GBM) is the most common, and most aggressive primary brain tumor among adults. A vast majority of the tumors express high levels of the epidermal growth factor receptor (EGFR) as a consequence of gene amplification. Furthermore, gene amplification is often associated with mutation of EGFR, and the constitutive activated deletion variant EGFRvIII is the most common EGFR mutation found in GBM. Activated EGFR signaling, through overexpression and/or mutation, is involved in increased tumorigenic potential. As such, EGFR is an attractive target for GBM therapy. However, clinical studies with EGFR inhibitors have shown inconsistent results, and as such, further knowledge regarding the role of EGFR and EGFRvIII in GBM is needed. For this, an appropriate in vivo/in vitro tumor model is required. Here, we report the establishment of an experimental GBM model in which the expressions of EGFR and EGFRvIII are maintained both in xenograft tumors growing subcutaneously on mice and in cell cultures established in stem cell conditions. With this model it will be possible to further study the role of EGFR and EGFRvIII, and response to targeted therapy, in GBM.
authors.affiliation: Department of Radiation Biology, The Finsen Center, Copenhagen University Hospital, Denmark. marie.stockhausen@rh.regionh.dk
authors.forename: Marie-Thérése
authors.initials: MT
authors.lastname: Stockhausen
authors.forename: Helle
authors.initials: H
authors.lastname: Broholm
authors.forename: Mette
authors.initials: M
authors.lastname: Villingshøj
authors.forename: Maria
authors.initials: M
authors.lastname: Kirchhoff
authors.forename: Tommy
authors.initials: T
authors.lastname: Gerdes
authors.forename: Karina
authors.initials: K
authors.lastname: Kristoffersen
authors.forename: Michael
authors.initials: M
authors.lastname: Kosteljanetz
authors.forename: Mogens
authors.initials: M
authors.lastname: Spang-Thomsen
authors.forename: Hans Skovgaard
authors.initials: HS
authors.lastname: Poulsen
mesh_terms: D000818:Animals; D015153:Blotting, Western; D001932:Brain Neoplasms / Q000235:genetics / Q000378:metabolism*; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005347:Fibroblasts / Q000166:cytology / Q000378:metabolism; D005784:Gene Amplification; D005909:Glioblastoma / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007124:Immunoenzyme Techniques; D017404:In Situ Hybridization, Fluorescence; D066298:In Vitro Techniques; D008168:Lung / Q000166:cytology / Q000378:metabolism; D051379:Mice; D008819:Mice, Nude; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018874:Spheroids, Cellular / Q000378:metabolism; D013234:Stem Cells / Q000378:metabolism; D023041:Xenograft Model Antitumor Assays
chemical_list: D012333:RNA, Messenger; C410723:epidermal growth factor receptor VIII; C512478:EGFR protein, human; D066246:ErbB Receptors