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Pim1 kinase is upregulated in glioblastoma multiforme and mediates tumor cell survival
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 2719230
Author(s) Herzog, Susann; Fink, Matthias Alexander; Weitmann, Kerstin; Friedel, Claudius; Hadlich, Stefan; Langner, Sönke; Kindermann, Katharina; Holm, Tobias; Böhm, Andreas; Eskilsson, Eskil; Miletic, Hrvoje; Hildner, Markus; Fritsch, Michael; Vogelgesang, Silke; Havemann, Christoph; Ritter, Christoph Alexander; Meyer zu Schwabedissen, Henriette Elisabeth; Rauch, Bernhard; Hoffmann, Wolfgang; Kroemer, Heyo Klaus; Schroeder, Henry; Bien-Möller, Sandra
Author(s) at UniBasel Meyer zu Schwabedissen, Henriette
Year 2015
Title Pim1 kinase is upregulated in glioblastoma multiforme and mediates tumor cell survival
Journal Neuro-oncology
Volume 17
Number 2
Pages / Article-Number 223-42
Keywords epidermal growth factor receptor, glioblastoma multiforme, pim1 kinase

Background. The current therapy for glioblastoma multiforme (GBM), the most aggressive and common primary brain tumor of adults, involves surgery and a combined radiochemotherapy that controls tumor progression only for a limited time window. Therefore, the identification of new molecular targets is highly necessary. Inhibition of kinases has become a standard of clinical oncology, and thus the oncogenic kinase Pim1 might represent a promising target for improvement of GBM therapy.Methods. Expression of Pim1 and associated signaling molecules was analyzed in human GBM samples, and the potential role of this kinase in patients' prognosis was evaluated. Furthermore, we analyzed the in vivo role of Pim1 in GBM cell growth in an orthotopic mouse model and examined the consequences of Pim1 inhibition in vitro to clarify underlying pathways.Results. In comparison with normal brain, a strong upregulation of Pim1 was demonstrated in human GBM samples. Notably, patients with short overall survival showed a significantly higher Pim1 expression compared with GBM patients who lived longer than the median. In vitro experiments with GBM cells and analysis of patients' GBM samples suggest that Pim1 regulation is dependent on epidermal growth factor receptor. Furthermore, inhibition of Pim1 resulted in reduced cell viability accompanied by decreased cell numbers and increased apoptotic cells, as seen by elevated subG1 cell contents and caspase-3 and -9 activation, as well as modulation of several cell cycle or apoptosis regulatory proteins.Conclusions. Altogether, Pim1 could be a novel therapeutic target, which should be further analyzed to improve the outcome of patients with aggressive GBM.

Publisher Oxford University Press
ISSN/ISBN 1522-8517
Full Text on edoc No
Digital Object Identifier DOI 10.1093/neuonc/nou216
PubMed ID
ISI-Number WOS:000350138500007
Document type (ISI) Journal Article

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