Receptor-mediated, tumor-targeted gene delivery using folate-terminated polyrotaxanes.

Abstract:

:Safe and effective gene delivery is essential to the success of gene therapy. We synthesized and characterized a novel nonviral gene delivery system in which folate (FA) molecules were functioned as blockers on cationic polyrotaxanes (PR) composed of poly(ethylenimine) (PEI)(600)-grafted α-cyclodextrin rings linearized on polyethylene glycol to form FA-terminated PR-PEI(600) (FPP). The FA terminal caps of FPP target cell surfaces abundant in FA receptor (FR), a common feature of tumor cells. The structure of FPP was characterized by using (1)H nuclear magnetic resonance ((1)H NMR). The delivery particle was composed of chemically bonded PEG (4000), α-cyclodextrins (CD), and PEI (600 Da) at a molar ratio of 1:17:86.7, and the particle size and zeta potential of FPP/pDNA polyplexes were measured using dynamic light scattering. FPP/pDNA exhibited a lower cytotoxicity, strong specificity to FR, and high efficiency of delivering DNA to target cells in vitro and in vivo with the reporter genes. Furthermore, the FPP/DNA complex showed an enhanced antitumor effect in the nude mice compared with other delivery systems, such as PEI-25K. Together, these results suggest that FPP may be useful for gene therapy.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Zhou Y,Wang H,Wang C,Li Y,Lu W,Chen S,Luo J,Jiang Y,Chen J

doi

10.1021/mp200315c

subject

Has Abstract

pub_date

2012-05-07 00:00:00

pages

1067-76

issue

5

eissn

1543-8384

issn

1543-8392

journal_volume

9

pub_type

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