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Preparation of ε-Polylysine Modified Silica Nanoparticles

Gene vector system is the key to realize gene transduction and therapy. A proper gene vector can introduce the target gene into cells securely, efficiently, controllably and easily, and achieve purposes of gene transfection and disease treatment after its expression. ε-polylysine (ε-PL),which is rich in cationic and has high penetrability through biological membrane,can be applied in DNA carrier. In this study, we presented a novel approach for preparing ε-polylysine modified silica nanoparticles and combinating them with plasmid DNA.