Journal
CELLULAR AND MOLECULAR NEUROBIOLOGY
Volume 33, Issue 5, Pages 651-657Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10571-013-9927-6
Keywords
miR-107; Glioma stem cells; Proliferation; Invasiveness; Notch2
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Funding
- funds for the National Key Clinic Department
- Natural Science Fund of China [81171179, 81272439]
- Funds for Key Sci-Tech Research Project of Guangdong [2008A030201019]
- Funds for Key Sci-Tech Research Project of Guangzhou [09B52120112-2009J1-C418-2, 2008A1-E4011-6]
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Glioma stem cells (GSCs) are thought to be critical for resistance to radiotherapy and chemotherapy and for tumor recurrence after surgery in glioma patients. Identification of new therapeutic strategies that can target GSCs may thus be critical for improving patient survival. MicroRNAs (miRNAs) are small non-coding RNAs that function as tumor suppressors or oncogenes. In this study, we confirmed that miR-107 was down-regulated in GSCs. To investigate the role of miR-107 in tumorigenesis of GSCs, a lentiviral vector over-expressing miR-107 in U87GSCs was constructed. We found that over-expression of miR-107 suppressed proliferation and down-regulated Notch2 protein and stem cell marker (CD133 and Nestin) expression in U87GSCs. Furthermore, enhanced miR-107 expression significantly inhibited U87GSC invasion and reduced matrix metalloproteinase-12 expression. miR-107 also suppressed U87GSCs xenograft growth in vivo. These findings suggest that miR-107 is involved in U87GSCs growth and invasion and may provide a potential therapeutic target for glioma treatment.
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