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2015 ; 25
(2
): 53-64
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siRNA delivery to the glomerular mesangium using polycationic cyclodextrin
nanoparticles containing siRNA
#MMPMID25734248
Zuckerman JE
; Gale A
; Wu P
; Ma R
; Davis ME
Nucleic Acid Ther
2015[Apr]; 25
(2
): 53-64
PMID25734248
show ga
There is an urgent need for new therapies that can halt or reverse the course of
chronic kidney disease with minimal side-effect burden on the patient. Small
interfering RNA (siRNA) nanoparticles are new therapeutic entities in clinical
development that could be useful for chronic kidney disease treatment because
they combine the tissue-specific targeting properties of nanoparticles with the
gene-specific silencing effects of siRNA. Recent reports have emerged
demonstrating that the kidney, specifically the glomerulus, is a readily
accessible site for nanoparticle targeting. Here, we explore the hypothesis that
intravenously administered polycationic cyclodextrin nanoparticles containing
siRNA (siRNA/CDP-NPs) can be used for delivery of siRNA to the glomerular
mesangium. We demonstrate that siRNA/CDP-NPs localize to the glomerular mesangium
with limited deposition in other areas of the kidney after intravenous injection.
Additionally, we report that both mouse and human mesangial cells rapidly
internalize siRNA/CDP-NPs in vitro and that nanoparticle uptake can be enhanced
by attaching the targeting ligands mannose or transferrin to the nanoparticle
surface. Lastly, we show knockdown of mesangial enhanced green fluorescent
protein expression in a reporter mouse strain following iv treatment with
siRNA/CDP-NPs. Altogether, these data demonstrate the feasibility of mesangial
targeting using intravenously administered siRNA/CDP-NPs.