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miR-101 is down-regulated in glioblastoma resulting in EZH2-induced proliferation, migration, and angiogenesis

  1. Author:
    Smits, M.
    Nilsson, J.
    Mir, S. E.
    van der Stoop, P. M.
    Hulleman, E.
    Niers, J. M.
    Hamer, P.
    Marquez, V. E.
    Cloos, J.
    Krichevsky, A. M.
    Noske, D. P.
    Tannous, B. A.
    Wurdinger, T.

  2. Author Address

    [Smits, M; Nilsson, J; Mir, SE; van der Stoop, PM; Hulleman, E; Hamer, PCDW; Cloos, J; Noske, DP; Wurdinger, T] Vrije Univ Amsterdam Med Ctr, Canc Ctr Amsterdam, Dept Neurosurg, Neurooncol Res Grp, Amsterdam, Netherlands. [Smits, M; Nilsson, J; Mir, SE; van der Stoop, PM; Hulleman, E; Hamer, PCDW; Cloos, J; Noske, DP; Wurdinger, T] Vrije Univ Amsterdam Med Ctr, Canc Ctr Amsterdam, Dept Pediat Oncol Hematol, Neurooncol Res Grp, Amsterdam, Netherlands. [Niers, JM; Tannous, BA; Wurdinger, T] Massachusetts Gen Hosp, Dept Neurol, Mol Neurogenet Unit, Boston, MA 02114 USA. [Niers, JM; Tannous, BA; Wurdinger, T] Massachusetts Gen Hosp, Dept Radiol, Mol Neurogenet Unit, Boston, MA 02114 USA. [Niers, JM; Tannous, BA; Wurdinger, T] Harvard Univ, Sch Med, Neurosci Program, Boston, MA 02115 USA. [Marquez, VE] NCI, Med Chem Lab, Ctr Canc Res, Frederick, MD 21701 USA. [Krichevsky, AM] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Neurol, Boston, MA 02115 USA.;Nilsson, J (reprint author), Vrije Univ Amsterdam Med Ctr, Canc Ctr Amsterdam, Dept Neurosurg, Neurooncol Res Grp, Amsterdam, Netherlands;j.nilsson@vumc.nl t.wurdinger@vumc.nl
    1. Year: 2010
    2. Date: Dec
  2. Journal: Oncotarget
    1. 1
    2. 8
    3. Pages: 710-720
  4. Type of Article: Article
  5. ISSN: 1949-2553
  1. Abstract:

    Background: Glioblastoma (GBM) is a malignant brain tumor with dismal prognosis. GBM patients have a median survival of less than 2 years. GBM is characterized by fast cell proliferation, infiltrative migration, and by the induction of angiogenesis. MicroRNAs and polycomb group (PcG) proteins have emerged as important regulators of gene expression. Methods: Here we determined that miR-101 is down-regulated in GBM, resulting in overexpression of the miR-101 target PcG protein EZH2, a histone methyltransferase affecting gene expression profiles in an epigenetic manner. Results: Inhibition of EZH2 in vitro by pre-miR-101, EZH2 siRNA, or small molecule DZNep, attenuated GBM cell growth, migration/invasion, and GBM-induced endothelial tubule formation. In addition, for each biological process we identified ontology-associated transcripts that significantly correlate with EZH2 expression. Inhibition of EZH2 in vivo by systemic DZNep administration in a U87-Fluc-mCherry GBM xenograft mouse imaging model resulted in reduced tumor growth. Conclusion: Our results indicate that EZH2 has a versatile function in GBM progression and that its overexpression is at least partly due to decreased miR-101 expression. Inhibition of EZH2 may be a potential therapeutic strategy to target GBM proliferation, migration, and angiogenesis.cancer, microRNA, Policomb group, glioblastoma, angiogenesis

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External Sources

  1. View record in Web of Science®
  2. WOS: 000293506500003

Library Notes

  1. Fiscal Year: FY2010-2011
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