Efficient encapsulation of plasmid DNA in pH-sensitive PMPC-PDPA polymersomes: study of the effect of PDPA block length on copolymer-DNA binding affinity.

Abstract:

:We report the self-assembly of a series of amphiphilic diblock copolymers comprising a biocompatible, hydrophilic block, poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) and a pH-sensitive block, poly(2-(diisopropylamino)ethyl methacrylate) (PDPA), into a dispersion of colloidally stable, nanometer-sized polymersomes at physiological pH and salt concentration. The pH-sensitivity of the PDPA block affords the electrostatic interaction of these block copolymers with nucleic acids at endocytic pH, as a result of the protonation of its tertiary amine groups at pH values below its pK(a). Herein we investigate the effect of PDPA block length on the binding affinity of the block copolymer to plasmid DNA.

journal_name

Macromol Biosci

authors

Lomas H,Du J,Canton I,Madsen J,Warren N,Armes SP,Lewis AL,Battaglia G

doi

10.1002/mabi.201000083

subject

Has Abstract

pub_date

2010-05-14 00:00:00

pages

513-30

issue

5

eissn

1616-5187

issn

1616-5195

journal_volume

10

pub_type

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