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Article | Open Access

Gold Nanorods Coated with Multilayer Polyelectrolyte as Intracellular delivery Vector of Antisense Oligonucleotides

Shouhui Chen, Yuxuan Ji, Qiong Lian, Yanli Wen, Hebai Shen, Nengqin Jia( )
Department of Chemistry, College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, China
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Abstract

A novel functionaliztion of gold nanorods (GNRs) intracellular delivery system was prepared via electrostatically layer-by-layer assemblying, in which multilayer polyelectrolyte-coated GNRs were used as vector and antisense oligodeoxynucleotides (ASODNs) as therapeutic gene. The as-prepared positively charged GNRs were firstly modified with two successive polyelectrolyte layers of the negatively charged poly(sodium-4-styrenesulfonate) (PSS) and positively charged polyenthylenimine (PEI) in order to greatly improve the biocompatibility of these cetyltrimethylammonium bromide(CTAB)-coated GNRs and facilitate further biofunctionalization. The multilayered polyelectrolyte functionalized GNRs were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM) and MTT assay. The polyelectrolytes-coated GNRs were then used as vector for ASODNs. Electrochemical impedance spectroscopy(EIS) was employed to confirm the formation of the GNRs-ASODNs conjugates through electrostatic interaction. Furthermore, cellular uptake and delivery efficiency of the GNRs-ASODNs conjugates as well as cellular apoptosis induced by the ASODNs transfected with gold nanorods were investigated by confocal microscopy and flow cytometry, exhibiting efficient intracellular delivery and improved antitumor activity of ASODNs by the polyelectrolytes-coated GNRs carriers.

Keywords

BiocompatibilityGold nanorodsPolyelectrolytesAntisense oligodeoxynucleotidesIntracellular delivery vector

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Nano Biomedicine and Engineering
Volume 2 Issue 1,
March 2010
Pages 15-23
DOI: 10.5101/nbe.v2i1.p15-23
Cite this article:
Chen S, Ji Y, Lian Q, et al. Gold Nanorods Coated with Multilayer Polyelectrolyte as Intracellular delivery Vector of Antisense Oligonucleotides. Nano Biomedicine and Engineering, 2010, 2(1): 15-23. https://doi.org/10.5101/nbe.v2i1.p15-23

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Received: 10 January 2010
Accepted: 21 February 2010
Published: 05 March 2010
© 2010 S. Chen et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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