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The attenuation of restenosis following arterial gene transfer using carbon nanotube coated stent incorporating TAT/DNAAng1+Vegf nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
6671 510 2012 10 PDF Available
Title
The attenuation of restenosis following arterial gene transfer using carbon nanotube coated stent incorporating TAT/DNAAng1+Vegf nanoparticles
Abstract

This study report the development of a nanobiohybrid hydrogel based endovascular stent device capable of preventing postangioplasty in-stent restenosis (ISR) by promoting significant vascular endothelial recovery in a site-specific manner. The hydrogel is comprised of fibrin matrices, assembled layer-by-layer (LbL) on stent surface with alternate layers carrying endosomolytic Tat peptide/DNA nanoparticles (NPs) or NPs hybridized to polyacrylic acid (PAA) wrapped single-walled carbon nanotubes (NP–CNT). Here, the hydrogel works as a reservoir to carry, protect, and simultaneously deliver pro-angiogenic, vascular endothelial growth factor (Vegf) and Angiopoietin-1(Ang1), gene carrying NPs to the target site. In vitro results demonstrated that CNTs incorporated in the hydrogel layers play a major role in tuning the bioactivity of the stent. In addition, the developed stent formulation can significantly reduce the loss of therapeutics while traversing through the vessel and during deployment. In vivo experiments in balloon-injured canine femoral artery demonstrated that the NCS (+) group, carrying NPvegf+Ang1, can significantly enhance re-endothelialization of injured artery compared to control NCS (−), carrying NPNull, and bare metal stent (BMS) groups, attenuate stenosis (18.5 ± 9.03% vs 39.56 ± 13.8 vs 45.34 ± 8.3%; n = 8, p < 0.05) and prevent neointima formation (1.53 ± 0.36 mm2 vs 2.51 ± 0.27 mm2 vs 2.66 ± 0.14 mm2; n = 8, p < 0.05) as analyzed angiography and histomorphometric analysis. These data collectively implicate that this new technology can be useful for stent and other biomedical devices through controlled delivery of multiple biotherapeutics.

Keywords
Stent; Nanoparticles; Restenosis; Hydrogel; Endothelium
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The attenuation of restenosis following arterial gene transfer using carbon nanotube coated stent incorporating TAT/DNAAng1+Vegf nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 33, Issue 30, October 2012, Pages 7655–7664
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us