Mechanisms of polyethylenimine-mediated DNA delivery: free carrier helps to overcome the barrier of cell-surface glycosaminoglycans.


BACKGROUND Polyethylenimine (PEI) polyplexes mediate efficient gene transfer only at high +/- charge ratios at which free noncomplexed PEI is present. The excess of PEI gives polyplexes a positive surface charge that plays a role in polyplex binding on the cell membrane. Although positively charged PEI polyplexes are known to interact with anionic cell… (More)
DOI: 10.1002/jgm.1587


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