title: A unique and highly efficient non-viral DNA/siRNA delivery system based on PEI-bisepoxide nanoparticles.
abstract: Delivery of DNA and siRNA into mammalian cells is a powerful technique in treating various diseases caused by single gene defects. Herein, we report a highly efficient delivery system using 1,4-butanediol diglycidyl ether (bisepoxide) crosslinked polyethylenimine (PEI) nanoparticles (PN). The nanoparticle/DNA complexes (nanoplexes) exibited approximately 2.5- to 5.0-fold gene transfer efficacy and decreased cytotoxicity in cultured cell lines, compared to the native PEI (25 kDa) (gold standard) and commercially available transfection agents such as Lipofectamine 2000 and Fugene. The bisepoxide crosslinking results in change in amine ratio in PEI; however, it retains the net charge on PN unaltered. A series of nanoparticles obtained by varying the degree of crosslinking was found to be in the size range of 69-77 nm and the zeta potential varying from +35 to 40 mV. The proposed system was also found to deliver siRNA efficiently into HEK cells, resulting in approximately 70% suppression of the targetted gene (GFP).
authors.affiliation: Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi 110 007, India.
authors.forename: Archana
authors.initials: A
authors.lastname: Swami
authors.forename: Raj K
authors.initials: RK
authors.lastname: Kurupati
authors.forename: Atul
authors.initials: A
authors.lastname: Pathak
authors.forename: Y
authors.initials: Y
authors.lastname: Singh
authors.forename: P
authors.initials: P
authors.lastname: Kumar
authors.forename: K C
authors.initials: KC
authors.lastname: Gupta
mesh_terms: D002460:Cell Line; D004247:DNA / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D004337:Drug Carriers / Q000737:chemistry*; D005822:Genetic Vectors; D006801:Humans; D007668:Kidney / Q000502:physiology*; D053758:Nanoparticles / Q000737:chemistry; D011094:Polyethyleneimine / Q000737:chemistry*; D034741:RNA, Small Interfering / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D014162:Transfection / Q000379:methods*; D014780:Viruses / Q000235:genetics