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A biodegradable amphiphilic pentablock copolymer PAE‐PCL‐PEG‐PCL‐PAE with a pH‐sensitive unit was synthesized for use as a nontoxic, biodegradable carrier for gene delivery by forming nanocapsules entrapping nucleic acid drugs. The PAE block can interact with plasmid DNA to form polyelectrolyte complexes in an acidic environment. At physiological pH, the PAE blocks are deprotonated and form an insoluble...
Pluronic/poly(ethylenimine) (PEI2K) nanocapsules (NCs) exhibiting a thermally reversible swelling/deswelling volume expansion behavior were synthesized and used for an siRNA delivery nanocarrier as well as an effective endosome breaking agent. Pluronic/PEI2K nanocapsules were in a collapsed state with an average size of 118.9±15.3 nm at 37 °C, but in a swollen state with that of 412.3±83.2 nm at 15 °C...
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