Development of a low toxicity, effective pDNA vector based on noncovalent assembly of bioresponsive amino-β-cyclodextrin:adamantane-poly(vinyl alcohol)-poly(ethylene glycol) transfection complexes.

Development of a low toxicity, effective pDNA vector based on noncovalent assembly of bioresponsive amino-β-cyclodextrin:adamantane-poly(vinyl alcohol)-poly(ethylene glycol) transfection complexes.
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DOI:
10.1021/bc2005158
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发表时间:
2012-05-16
影响因子:
4.7
通讯作者:
Thompson, David H.
Thompson, David H.
中科院分区:
化学2区
文献类型:
--
作者:
Kulkarni, Aditya;Deng, Wei;Hyun, Seok-hee;Thompson, David H.

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A host:guest-derived gene delivery vector has been developed, based on the self-assembly of cationic β-CD derivatives with a poly(vinyl alcohol)MW27kD (PVA) main chain polymer bearing poly(ethylene glycol)MW750 (PEG) or MW2000 PEG and acid-labile adamantane-modified (Ad) grafts through an acid-sensitive benzylidene acetal linkage. These components were investigated for their ability to promote supramolecular complex formation with pDNA using two different assembly schemes, involving either pre-complexation of the pendant Ad-PVA-PEG polymer with the cationic β-CD derivatives before pDNA condensation (Method A) or pDNA condensation with the cationic β-CD derivatives prior to addition of Ad-PVA-PEG to engage host:guest complexation (Method B). The pendant polymers were observed to degrade under acidic conditions, while remaining intact for more than 5 d at pH 7. HeLa cell culture data shows that these materials have 103-fold lower cytotoxicities than 25 kD bPEI, while maintaining transfection efficiencies that are superior to those observed for this benchmark cationic polymer transfection reagent when the Method A assembly scheme is employed. These findings suggest that degradable cationic polymer constructs employing multivalent host:guest interactions may be an effective and low-toxicity vehicle for delivering nucleic acid cargo to target cells.
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