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Published in: Journal of Neuro-Oncology 3/2013

01-09-2013 | Laboratory Investigation

miR-124 radiosensitizes human glioma cells by targeting CDK4

Authors: Xubin Deng, Lei Ma, Minhua Wu, Gong Zhang, Chuan Jin, Yuping Guo, Ruilei Liu

Published in: Journal of Neuro-Oncology | Issue 3/2013

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Abstract

The aberrant expression of cyclin-dependent kinase-4 (CDK4) has previously been observed in human brain glioma. Furthermore, it is observed that up-regulation of CDK4 is associated with therapy resistance and relapse. However, the mechanisms behind these phenomena remain unclear. Here, we demonstrated that elevated CDK4 expression is correlated with poor prognosis in glioma after radiotherapy and that CDK4 knockdown conferred radiosensitivity in glioma cell lines. CDK4 was identified as potential downstream target of miR-124 through bioinformatics analysis and dual-firefly luciferase reporter assay. Furthermore, restoration of miR-124 could confer radiosensitivity. Cell differentiation agent-2 (CDA-2) mimicked the effect of miR-124 restoration and CDK4 knockdown, and sensitized xenografts to radiation in an animal model. Our findings demonstrated for the first time that CDK4 was a downstream target of miR-124 and that CDA-2 could radiosensitize Glioblastoma multiforme cells through the MiR-124-CDK4 axis.
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Metadata
Title
miR-124 radiosensitizes human glioma cells by targeting CDK4
Authors
Xubin Deng
Lei Ma
Minhua Wu
Gong Zhang
Chuan Jin
Yuping Guo
Ruilei Liu
Publication date
01-09-2013
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 3/2013
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-013-1179-2

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