title: PELGE nanoparticles as new carriers for the delivery of plasmid DNA.
abstract: Biodegradable monomethoxy(polyethyleneglycol)-poly(lactide-co-glycolide)-monomethoxy(poly-ethyleneglycol) (PELGE) copolymers were synthesized by ring-opening polymerization to formulate plasmid DNA loaded nanoparticles. A double emulsion method with polyvinyl alcohol as the emulsifier in the external aqueous phase was employed to prepare nanoparticles. The effects of monomethoxypoly(ethyleneglycol) (mPEG) segments in the polymer on particle size, zeta potential, encapsulation efficiency and in vitro release were investigated. It was found that the introduction of a certain amount of hydrophilic mPEG segments in the copolymer chains could improve the affinity of copolymer with plasmid DNA and enhance the emulsification ability of the copolymer. Thus DNA loaded nanoparticles with smaller particle sizes and higher encapsulation efficiencies were obtained by using PELGE copolymer as the matrix.
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Section 3, Renmin South Road, Chengdu 610041, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Sun
authors.forename: You-Rong
authors.initials: YR
authors.lastname: Duan
authors.forename: Qin
authors.initials: Q
authors.lastname: He
authors.forename: Jiao
authors.initials: J
authors.lastname: Lu
authors.forename: Zhi-Rong
authors.initials: ZR
authors.lastname: Zhang
mesh_terms: D004247:DNA / Q000008:administration & dosage* / Q000235:genetics / Q000493:pharmacokinetics; D004337:Drug Carriers / Q000008:administration & dosage* / Q000493:pharmacokinetics; D006016:Glycolates / Q000008:administration & dosage* / Q000493:pharmacokinetics; D019344:Lactic Acid; D049329:Nanostructures; D010316:Particle Size; D011092:Polyethylene Glycols / Q000008:administration & dosage* / Q000493:pharmacokinetics; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer
chemical_list: D004337:Drug Carriers; D006016:Glycolates; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D011092:Polyethylene Glycols; D004247:DNA