Targeting Glioma Stem Cells by Functional Inhibition of a Prosurvival OncomiR-138 in Malignant Gliomas
| Autor: | Vladimir A. Kuznetsov, Felicia E. Gopal, Xin Hui Derryn Chan, Ghim Siong Ow, Ivshina Anna Vladimirovna, Johannes Haybaeck, Pamela Rizk, Srikanth Nama, Prabha Sampath, Gopinath M Sundaram, Vivek Tanavde, Srinivas Ramasamy |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Male
Cell Survival Apoptosis Biology medicine.disease_cause Bioinformatics General Biochemistry Genetics and Molecular Biology Cell Line Tumor Glioma microRNA medicine Humans Prognostic biomarker Clinical significance RNA Neoplasm lcsh:QH301-705.5 Oncomir Prognosis medicine.disease Gene Expression Regulation Neoplastic MicroRNAs lcsh:Biology (General) Neoplastic Stem Cells Cancer research Female Stem cell Carcinogenesis |
| Zdroj: | Cell Reports, Vol 2, Iss 3, Pp 591-602 (2012) |
| ISSN: | 2211-1247 |
| Popis: | Summary Malignant gliomas are the most aggressive forms of brain tumors, associated with high rates of morbidity and mortality. Recurrence and tumorigenesis are attributed to a subpopulation of tumor-initiating glioma stem cells (GSCs) that are intrinsically resistant to therapy. Initiation and progression of gliomas have been linked to alterations in microRNA expression. Here, we report the identification of microRNA-138 (miR-138) as a molecular signature of GSCs and demonstrate a vital role for miR-138 in promoting growth and survival of bona fide tumor-initiating cells with self-renewal potential. Sequence-specific functional inhibition of miR-138 prevents tumorsphere formation in vitro and impedes tumorigenesis in vivo. We delineate the components of the miR-138 regulatory network by loss-of-function analysis to identify specific regulators of apoptosis. Finally, the higher expression of miR-138 in GSCs compared to non-neoplastic tissue and association with tumor recurrence and survival highlights the clinical significance of miR-138 as a prognostic biomarker and a therapeutic target for treatment of malignant gliomas. |
| Databáze: | OpenAIRE |
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