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2016 ; 6
(ä): 25636
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Discovery of novel peptides targeting pro-atherogenic endothelium in disturbed
flow regions -Targeted siRNA delivery to pro-atherogenic endothelium in vivo
#MMPMID27173134
Chung J
; Shim H
; Kim K
; Lee D
; Kim WJ
; Kang DH
; Kang SW
; Jo H
; Kwon K
Sci Rep
2016[May]; 6
(ä): 25636
PMID27173134
show ga
Atherosclerosis occurs preferentially in arterial regions exposed to disturbed
blood flow. Targeting these pro-atherogenic regions is a potential
anti-atherogenic therapeutic approach, but it has been extremely challenging.
Here, using in vivo phage display approach and the partial carotid ligation model
of flow-induced atherosclerosis in mouse, we identified novel peptides that
specifically bind to endothelial cells (ECs) exposed to disturbed flow condition
in pro-atherogenic regions. Two peptides, CLIRRTSIC and CPRRSHPIC, selectively
bound to arterial ECs exposed to disturbed flow not only in the partially ligated
carotids but also in the lesser curvature and branching point of the aortic arch
in mice as well as human pulmonary artery branches. Peptides were conjugated to
branched polyethylenimine-polyethylene glycol polymer to generate polyplexes
carrying siRNA targeting intercellular adhesion molecule-1 (siICAM-1). In mouse
model, CLIRRTSIC polyplexes carrying si-ICAM-1 specifically bound to endothelium
in disturbed flow regions, reducing endothelial ICAM-1 expression. Mass
spectrometry analysis revealed that non-muscle myosin heavy chain II A (NMHC IIA)
is a protein targeted by CLIRRTSIC peptide. Further studies showed that shear
stress regulates NMHC IIA expression and localization in ECs. The CLIRRTSIC is a
novel peptide that could be used for targeted delivery of therapeutics such as
siRNAs to pro-atherogenic endothelium.
|Amino Acid Sequence
[MESH]
|Animals
[MESH]
|Atherosclerosis/genetics/*prevention & control
[MESH]