title: Poly(ester anhydride)/mPEG amphiphilic block co-polymer nanoparticles as delivery devices for paclitaxel.
abstract: This work focused on the preparation and characterization of a novel amphiphilic block co-polymer and paclitaxel-loaded co-polymer nanoparticles (NPs) and in vitro evaluation of the release of paclitaxel and cytotoxicity of NPs. mPEG-b-P(OA-DLLA)-b-mPEG was prepared via melt polycondensation of methoxy poly(ethylene glycol) (mPEG), octadecanedioic acid (OA) and D,L-lactic acid (DLLA) and characterized by FT-IR, (1)H-NMR, (13)C-NMR, GPC, DSC and XRD. The paclitaxel-loaded mPEG-b-P(OA-DLLA)-b-mPEG NPs were prepared by nanoprecipitation and then characterized by LPSA, TEM and (1)H-NMR. In vitro release behaviors of the paclitaxel-loaded NPs were investigated by HPLC. In vitro cytotoxicity of NPs was evaluated by MTT assay with normal mouse lung fibroblast cells (L929) as model cells. The composition of mPEG-b-P(OA-DLLA)-b-mPEG is consistent with that of the designed co-polymer. The paclitaxel-loaded NPs are of spherical shape with core/shell structure and size smaller than 300 nm. Paclitaxel can be continuously released from the paclitaxel-loaded NPs and the in vitro release rate of paclitaxel decreases with increasing the content of the P(OA-DLLA) segments in the co-polymer. The mPEG-b-P(OA-DLLA)-b-mPEG NPs are non-toxic to L929. The results suggest that mPEG-b-P(OA-DLLA)-b-mPEG NPs are a potential candidate carrier material for the controlled delivery of paclitaxel and other hydrophobic compounds.
authors.affiliation: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Liang
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.forename: Yimei
authors.initials: Y
authors.lastname: Li
authors.forename: Yinglei
authors.initials: Y
authors.lastname: Zhai
authors.forename: Chaopeng
authors.initials: C
authors.lastname: Xie
authors.forename: Liandong
authors.initials: L
authors.lastname: Deng
authors.forename: Anjie
authors.initials: A
authors.lastname: Dong
mesh_terms: D000812:Anhydrides / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism; D002460:Cell Line; D004337:Drug Carriers / Q000737:chemistry* / Q000378:metabolism; D005347:Fibroblasts / Q000166:cytology / Q000378:metabolism; D008422:Materials Testing; D051379:Mice; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D017239:Paclitaxel / Q000737:chemistry* / Q000378:metabolism; D011091:Polyesters / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism; D011092:Polyethylene Glycols / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000812:Anhydrides; D001672:Biocompatible Materials; D004337:Drug Carriers; D011091:Polyesters; D011092:Polyethylene Glycols; D017239:Paclitaxel