Abstract
Non-viral carriers for gene therapy have been developed to minimize carrier cytotoxicity and to enhance transfection efficiency. Previously, we synthesized a 9-arginine-based reducible high molecular weight peptide for gene delivery. For the reducible poly(oligo- d-arginines) (rPOA), 9-arginine oligopeptides are connected by internal disulfide linkages to produce a high molecular weight peptide. In this study, rPOA was evaluated as a carrier of the heme oxygenase-1 (HO-1) gene for the treatment of ischemia/reperfusion (I/R) -induced brain stroke. An in vitro transfection assay showed that rPOA had higher transfection efficiency and lower toxicity than polyethylenimine (PEI). For in vivo evaluation, I/R rat models were produced by middle cerebral artery occlusion (MCAO). rPOA/HO-1 expression plasmid (pHO-1) polyplexes were injected into the brain at 1 h before MCAO, and HO-1 expression levels in the brain were then measured by ELISA. The results indicated that rPOA/pHO-1 polyplexes had higher transfection efficiencies than PEI/pHO-1 polyplexes. The rPOA/pHO-1 polyplexes significantly reduced infarct volumes. In addition, tumor necrosis factor-alpha (TNF-α) was reduced in the rPOA/pHO-1 polyplex injection group, suggesting that HO-1 had an anti-inflammatory effect, while the PEI/pHO-1 polyplex did not show this effect. These results suggest that rPOA is a potential non-viral vector for HO-1 gene therapy to protect brain cells from I/R-related neuronal injury including stroke.
Original language | English (US) |
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Pages (from-to) | 9128-9134 |
Number of pages | 7 |
Journal | Biomaterials |
Volume | 31 |
Issue number | 34 |
DOIs | |
State | Published - Dec 2010 |
Externally published | Yes |
Keywords
- Animal model
- Gene expression
- Gene therapy
- In vivo test
- Peptide
ASJC Scopus subject areas
- Biophysics
- Bioengineering
- Ceramics and Composites
- Biomaterials
- Mechanics of Materials