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 language | English |
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Pages (from-to) | 3127-3142 |
Number of pages | 16 |
Journal | nanomedicine |
Volume | 14 |
Issue number | 24 |
Early online date | 19 Dec 2019 |
DOIs | |
Publication status | Published - 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