title: Synthesis of functional core, star polymers via RAFT polymerization for drug delivery applications.
abstract: Poly(oligoethylene glycol) methyl ether acrylate was polymerized via reversible addition fragmentation transfer polymerization (RAFT), and then chain extended in the presence of both a cross-linker and vinyl benzaldehyde (VBA), yielding monodisperse star polymers. The presence of aldehyde groups in the core was exploited to attach doxorubicin. The drug loading was controlled by the amount of VBA incorporated (until 28 wt% in drug). The doxorubicin release was studied at pH = 5.5 and 7.4; conditions representative of endosomal and extra cellular environments. In vitro studies revealed that the doxorubicin-conjugated star polymers had a level of cytotoxicity comparable to that found for free doxorubicin. Confocal microscopy and flow cytometry studies confirmed efficient cell uptake of the star polymers.
authors.affiliation: Australian Centre for Nanomedicine, School of Chemical Engineering, The University of New South Wales, Sydney NSW 2052, Australia.
authors.forename: Jinna
authors.initials: J
authors.lastname: Liu
authors.forename: Hien
authors.initials: H
authors.lastname: Duong
authors.forename: Michael R
authors.initials: MR
authors.lastname: Whittaker
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Davis
authors.forename: Cyrille
authors.initials: C
authors.lastname: Boyer
mesh_terms: D000179:Acrylates / Q000737:chemistry; D001547:Benzaldehydes / Q000737:chemistry; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003432:Cross-Linking Reagents / Q000737:chemistry; D004317:Doxorubicin / Q000737:chemistry / Q000494:pharmacology; D016503:Drug Delivery Systems; D006801:Humans; D058726:Nanoconjugates / Q000737:chemistry*; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry; D058105:Polymerization; D014753:Vinyl Compounds / Q000737:chemistry
chemical_list: D000179:Acrylates; D001547:Benzaldehydes; D003432:Cross-Linking Reagents; D058726:Nanoconjugates; D014753:Vinyl Compounds; C530664:poly(oligoethylene glycol methyl ether acrylate); D011092:Polyethylene Glycols; D004317:Doxorubicin