Hampering brain tumor proliferation and migration using peptide nanofiber:siPLK1/MMP2 complexes

Mariarosa Mazza, Hassan Ahmad, Marilena Hadjidemetriou, Giulia Agliardi, Omar N Pathmanaban, Andrew T King, Brian W Bigger, Sandra Vranic, Kostas Kostarelos

Research output: Contribution to journalArticlepeer-review

Abstract

Aim: To develop a nonviral tool for the delivery of siRNA to brain tumor cells using peptide nanofibers (PNFs). Materials & methods: Uptake of PNFs was evaluated by confocal microscopy and flow cytometry. Gene silencing was determined by RT-qPCR and cell invasion assay. Results: PNFs enter phagocytic (BV-2) and nonphagocytic (U-87 MG) cells via endocytosis and passive translocation. siPLK1 delivered using PNFs reduced the expression of polo-like kinase 1 mRNA and induced cell death in a panel of immortalized and glioblastoma-derived stem cells. Moreover, targeting MMP2 using PNF:siMMP2 reduced the invasion capacity of U-87 MG cells. We show that stereotactic intra-tumoral administration of PNF:siPLK1 significantly extends the survival of tumor bearing mice comparing with the untreated tumor bearing animals. Conclusion: Our results suggest that this nanomedicine-based RNA interference approach deserves further investigation as a potential brain tumor therapeutic tool.

Original languageEnglish
Pages (from-to)3127-3142
Number of pages16
Journalnanomedicine
Volume14
Issue number24
Early online date19 Dec 2019
DOIs
Publication statusPublished - Dec 2019

Keywords

  • Animals
  • Brain Neoplasms/metabolism
  • Cell Cycle Proteins/genetics
  • Cell Line, Tumor
  • Cell Movement/genetics
  • Cell Proliferation/genetics
  • Flow Cytometry
  • Genetic Therapy/methods
  • Humans
  • Matrix Metalloproteinase 2/genetics
  • Mice
  • Mice, Nude
  • Microscopy, Confocal
  • Nanofibers/chemistry
  • Nanomedicine/methods
  • Peptides/chemistry
  • Protein-Serine-Threonine Kinases/genetics
  • Proto-Oncogene Proteins/genetics

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