Therapeutic effects of a reducible poly (oligo-D-arginine) carrier with the heme oxygenase-1 gene in the treatment of hypoxic-ischemic brain injury

Biomaterials. 2010 Dec;31(34):9128-34. doi: 10.1016/j.biomaterials.2010.08.038. Epub 2010 Sep 15.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Brain / enzymology
  • Brain / pathology
  • Brain Infarction / complications
  • Brain Infarction / pathology
  • Drug Carriers / chemistry*
  • Electrophoretic Mobility Shift Assay
  • Heme Oxygenase-1 / genetics*
  • Heme Oxygenase-1 / therapeutic use*
  • Hypoxia-Ischemia, Brain / complications
  • Hypoxia-Ischemia, Brain / pathology
  • Hypoxia-Ischemia, Brain / therapy*
  • Infarction, Middle Cerebral Artery
  • Male
  • Mice
  • Particle Size
  • Peptides / chemistry*
  • Plasmids / genetics
  • Proteins / chemistry*
  • Rats
  • Rats, Sprague-Dawley
  • Transfection


  • Drug Carriers
  • Peptides
  • Proteins
  • polyarginine
  • Heme Oxygenase-1