Restoring the oncosuppressor activity of microRNA-34a in glioblastoma using a polyglycerol-based polyplex

Paula Ofek, Marcelo Calderón, Fatemeh Sheikhi Mehrabadi, Adva Krivitsky, Shiran Ferber, Galia Tiram, Noga Yerushalmi, Sharon Kredo-Russo, Rachel Grossman, Zvi Ram, Rainer Haag, Ronit Satchi-Fainaro

Research output: Contribution to journalArticlepeer-review

Abstract

Glioblastoma multiforme (GBM) is the most common and aggressive primary neoplasm of the brain. Poor prognosis is mainly attributed to tumor heterogeneity, invasiveness, and drug resistance. microRNA-based therapeutics represent a promising approach due to their ability to inhibit multiple targets. In this work, we aim to restore the oncosuppressor activity of microRNA-34a (miR-34a) in GBM. We developed a cationic carrier system, dendritic polyglycerolamine (dPG-NH2), which remarkably improves miRNA stability, intracellular trafficking, and activity. dPG-NH2 carrying mature miR-34a targets C-MET, CDK6, Notch1 and BCL-2, consequently inhibiting cell cycle progression, proliferation and migration of GBM cells. Following complexation with dPG-NH2, miRNA is stable in plasma and able to cross the blood-brain barrier. We further show inhibition of tumor growth following treatment with dPG-NH2-miR-34a in a human glioblastoma mouse model. We hereby present a promising technology using dPG-NH2-miR-34a polyplex for brain-tumor treatment, with enhanced efficacy and no apparent signs of toxicity.

Original languageEnglish
Pages (from-to)2201-2214
Number of pages14
JournalNanomedicine: Nanotechnology, Biology, and Medicine
Volume12
Issue number7
DOIs
StatePublished - 1 Oct 2016

Keywords

  • Glioblastoma
  • MicroRNA-34a
  • Polyglycerol-based polyplex

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Molecular Medicine
  • Biomedical Engineering
  • General Materials Science
  • Medicine (miscellaneous)
  • Pharmaceutical Science

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