Novel poly(amido amine)s with bioreducible disulfide linkages in their diamino-units: structure effects and in vitro gene transfer properties

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Abstract

A series of novel water-soluble, bioreducible poly(amido amine)s (SS-PAAs) was synthesized by Michael addition polymerization of N,N′-dimethylcystamine (DMC) with various bisacrylamides. DMC-based SS-PAAs show high buffer capacities in the pH range 5.1–7.4, facilitating endosomal escape. The polymers form nanoscaled (< 250 nm) and positively charged (> + 20 mV) polyplexes which are relatively stable, but rapidly disintegrate in the presence of 2.5 mM DTT. These polyplexes have transfection efficiencies up to 4 times higher than bPEI in COS-7 cells, with low cytotoxicity.
Original languageEnglish
Pagese12-e13
DOIs
Publication statusPublished - 2 Apr 2008
Event10th European Symposium on Controlled Drug Delivery, ESCDD 2008 - Noordwijk aan Zee, Netherlands
Duration: 2 Apr 20084 Apr 2008
Conference number: 10

Conference

Conference10th European Symposium on Controlled Drug Delivery, ESCDD 2008
Abbreviated titleESCDD
Country/TerritoryNetherlands
CityNoordwijk aan Zee
Period2/04/084/04/08

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