Polymersome-loaded capsules for controlled release of DNA

Hannah Lomas, Angus Johnston, Georgina Kate Such, Zhiyuan Zhu, Kang Liang, Martin P Van Koeverden, Siripong Alongkornchotikul, Frank Caruso

Research output: Contribution to journalArticleResearchpeer-review

76 Citations (Scopus)


The formation of a novel drug-delivery carrier for the controlled release of plasmid DNA that comprises layer-by-layer polymer capsules subcompartmentalized with pH-sensitive nanometer-sized polymersomes is reported. The amphiphilic diblock copolymer poly(oligoethylene glycol methacrylate)-block-poly(2-(diisopropylamino)ethyl methacrylate) forms polymersomes at physiological pH, but transitions to unimeric polymer chains upon acidification to cellular endocytic pH. These polymersomes can thus release an encapsulated payload in response to a change in pH from physiological to endocytic conditions. Multicomponent layer-by-layer capsules are formed by exploiting the ability of tannic acid to act as an efficient hydrogen-bond donor for both the polymersomes and poly(N-vinyl pyrrolidone) at physiological pH. These capsules show release of a plasmid DNA payload encapsulated within the polymersome subcompartments in response to changes in pH between physiological and endocytic conditions.
Original languageEnglish
Pages (from-to)2109 - 2119
Number of pages11
Issue number14
Publication statusPublished - 2011
Externally publishedYes

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