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Erschienen in: Journal of Neuro-Oncology 3/2016

11.04.2016 | Laboratory Investigation

Shift of microRNA profile upon orthotopic xenografting of glioblastoma spheroid cultures

verfasst von: Bo Halle, Mads Thomassen, Ranga Venkatesan, Vivek Kaimal, Eric G. Marcusson, Sune Munthe, Mia D. Sørensen, Charlotte Aaberg-Jessen, Stine S. Jensen, Morten Meyer, Torben A. Kruse, Helle Christiansen, Steffen Schmidt, Jan Mollenhauer, Mette K. Schulz, Claus Andersen, Bjarne W. Kristensen

Erschienen in: Journal of Neuro-Oncology | Ausgabe 3/2016

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Abstract

Glioblastomas always recur despite surgery, radiotherapy and chemotherapy. A key player in the therapeutic resistance may be immature tumor cells with stem-like properties (TSCs) escaping conventional treatment. A group of promising molecular targets are microRNAs (miRs). miRs are small non-coding RNAs exerting post-transcriptional regulation of gene expression. In this study we aimed to identify over-expressed TSC-related miRs potentially amenable for therapeutic targeting. We used non-differentiated glioblastoma spheroid cultures (GSCs) containing TSCs and compared these to xenografts using a NanoString nCounter platform. This revealed 19 over-expressed miRs in the non-differentiated GSCs. Additionally, non-differentiated GSCs were compared to neural stem cells (NSCs) using a microarray platform. This revealed four significantly over-expressed miRs in the non-differentiated GSCs in comparison to the NSCs. The three most over-expressed miRs in the non-differentiated GSCs compared to xenografts were miR-126, -137 and -128. KEGG pathway analysis suggested the main biological function of these over-expressed miRs to be cell-cycle arrest and diminished proliferation. To functionally validate the profiling results suggesting association of these miRs with stem-like properties, experimental over-expression of miR-128 was performed. A consecutive limiting dilution assay confirmed a significantly elevated spheroid formation in the miR-128 over-expressing cells. This may provide potential therapeutic targets for anti-miRs to identify novel treatment options for GBM patients.
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Metadaten
Titel
Shift of microRNA profile upon orthotopic xenografting of glioblastoma spheroid cultures
verfasst von
Bo Halle
Mads Thomassen
Ranga Venkatesan
Vivek Kaimal
Eric G. Marcusson
Sune Munthe
Mia D. Sørensen
Charlotte Aaberg-Jessen
Stine S. Jensen
Morten Meyer
Torben A. Kruse
Helle Christiansen
Steffen Schmidt
Jan Mollenhauer
Mette K. Schulz
Claus Andersen
Bjarne W. Kristensen
Publikationsdatum
11.04.2016
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 3/2016
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-016-2125-x

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Seit 2022 gehört die medbee GmbH zum Springer Medizin Verlag

Schützt Olivenöl vor dem Tod durch Demenz?

10.05.2024 Morbus Alzheimer Nachrichten

Konsumieren Menschen täglich 7 Gramm Olivenöl, ist ihr Risiko, an einer Demenz zu sterben, um mehr als ein Vierten reduziert – und dies weitgehend unabhängig von ihrer sonstigen Ernährung. Dafür sprechen Auswertungen zweier großer US-Studien.

Bluttest erkennt Parkinson schon zehn Jahre vor der Diagnose

10.05.2024 Parkinson-Krankheit Nachrichten

Ein Bluttest kann abnorm aggregiertes Alpha-Synuclein bei einigen Menschen schon zehn Jahre vor Beginn der motorischen Parkinsonsymptome nachweisen. Mit einem solchen Test lassen sich möglicherweise Prodromalstadien erfassen und die Betroffenen früher behandeln.

Darf man die Behandlung eines Neonazis ablehnen?

08.05.2024 Gesellschaft Nachrichten

In einer Leseranfrage in der Zeitschrift Journal of the American Academy of Dermatology möchte ein anonymer Dermatologe bzw. eine anonyme Dermatologin wissen, ob er oder sie einen Patienten behandeln muss, der eine rassistische Tätowierung trägt.

Wartezeit nicht kürzer, aber Arbeit flexibler

Psychotherapie Medizin aktuell

Fünf Jahren nach der Neugestaltung der Psychotherapie-Richtlinie wurden jetzt die Effekte der vorgenommenen Änderungen ausgewertet. Das Hauptziel der Novellierung war eine kürzere Wartezeit auf Therapieplätze. Dieses Ziel wurde nicht erreicht, es gab jedoch positive Auswirkungen auf andere Bereiche.

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