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2016 ; 8
(10
): 6320-8
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Approach to Rapid Synthesis and Functionalization of Iron Oxide Nanoparticles for
High Gene Transfection
#MMPMID26894609
Stephen ZR
; Dayringer CJ
; Lim JJ
; Revia RA
; Halbert MV
; Jeon M
; Bakthavatsalam A
; Ellenbogen RG
; Zhang M
ACS Appl Mater Interfaces
2016[Mar]; 8
(10
): 6320-8
PMID26894609
show ga
Surface functionalization of theranostic nanoparticles (NPs) typically relies on
lengthy, aqueous postsynthesis labeling chemistries that have limited ability to
fine-tune surface properties and can lead to NP heterogeneity. The need for a
rapid, simple synthesis approach that can provide great control over the display
of functional moieties on NP surfaces has led to increased use of highly
selective bioorthoganol chemistries including metal-affinity coordination. Here
we report a simple approach for rapid production of a superparamagnetic iron
oxide NPs (SPIONs) with tunable functionality and high reproducibility under
aqueous conditions. We utilize the high affinity complex formed between catechol
and Fe((III)) as a means to dock well-defined catechol modified polymer modules
on the surface of SPIONs during sonochemical coprecipitation synthesis. Polymer
modules consisted of chitosan and poly(ethylene glycol) (PEG) copolymer (CP)
modified with catechol (CCP), and CCP functionalized with cationic
polyethylenimine (CCP-PEI) to facilitate binding and delivery of DNA for gene
therapy. This rapid synthesis/functionalization approach provided excellent
control over the extent of PEI labeling, improved SPION magnetic resonance
imaging (MRI) contrast enhancement and produced an efficient transfection agent.