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  • Title: Gene transfer using micellar nanovectors inhibits corneal neovascularization in vivo.
    Author: Iriyama A, Usui T, Yanagi Y, Amano S, Oba M, Miyata K, Nishiyama N, Kataoka K.
    Journal: Cornea; 2011 Dec; 30(12):1423-7. PubMed ID: 21975440.
    Abstract:
    PURPOSE: The efficacy of gene therapy using nonviral vector based on polyplex micelle has been studied against corneal neovascularization in mice. METHODS: A block copolymer, poly(ethylene glycol) (PEG)-block-polycation carrying ethylenediamine units in the side chain (PEG-b-P[Asp(DET)]), was prepared. PEG-b-P[Asp(DET)] formed a polyplex micelle through the polyion complex formation with plasmid DNA. To evaluate in vivo gene transfer efficiency, PEG-b-P[Asp(DET)] micelle was injected into the subconjunctival space of mice, and the expression of the reporter gene was assessed. Furthermore, mouse corneal neovascularization models were treated with the PEG-b-P[Asp(DET)] polyplex micelle containing expression plasmid vector of soluble vascular endothelial growth factor receptor 1 (sflt-1). RESULTS: Subconjunctival injection of the PEG-b-P[Asp(DET)] polyplex micelle containing a reporter gene showed prolonged gene expression with low cytotoxicity. Also, gene transfer into subconjunctival space by the polyplex micelle containing sflt-1 plasmid showed significant inhibition of corneal neovascularization in mice. CONCLUSIONS: Nonviral gene therapy using PEG-b-P[Asp(DET)] polyplex micelle may have potential for safe and effective therapeutic treatment of corneal neovascularization.
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