Delivery of miRNA Using Fe2O3 Nanoparticles Capped Polyethyleneimine as a Nonviral Carrier
An efﬁcient and safe delivery system of RNA interfering is required for clinical application of gene therapy. The study aimed to develop Fe2O3-based nanoparticles for gene delivery to overcome the disadvantages of polyethyleneimine (PEI) or cationic liposome as gene carrier including the cytotoxicity caused by positive charge and aggregation in the cells surface. PEI-capped Fe2O3 nanoparticles are successfully manufactured utilizing Fe2O3 as core, PEI as carapace, which bind miRNA at an appropriate weight ratio by electrostatic interaction and result in well-dispersed nanoparticles. The synthesized GFP tag with miR-26a expression plasmid was used for monitoring transfection efficiency in HepG2 cells. The nanocomplex exhibited higher transfection efficiency and lower cytotoxicity in HepG2 cells than the PEI/DNA complex and commercially available liposome. The delivery resulted in a significantly upregulation of miR-26a in HepG2 cells. Our results offer an alternate delivery system for RNA interfering that can be used on any gene of interest.
Chunliang Zhang and Liangchi Zhang
G. F. Liang et al., "Delivery of miRNA Using Fe2O3 Nanoparticles Capped Polyethyleneimine as a Nonviral Carrier", Key Engineering Materials, Vols. 531-532, pp. 543-546, 2013